Split Nenya into proper Maven submodules (same treatment Narya got).

aslib/pom.xml

@@ -0,0 +1,110 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>com.threerings</groupId>
+    <artifactId>nenya-parent</artifactId>
+    <version>1.4-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>nenyalib</artifactId>
+  <packaging>swc</packaging>
+  <name>Nenya ActionScript</name>
+
+  <repositories>
+    <repository>
+      <id>flexlib-repo</id>
+      <url>http://maven.ow2.org/maven2</url>
+    </repository>
+    <repository>
+      <id>ooo-ext-maven-repo</id>
+      <url>http://ooo-maven.googlecode.com/hg/repository</url>
+    </repository>
+    <repository>
+      <id>ooo-maven-repo</id>
+      <url>http://threerings.github.com/maven-repo</url>
+    </repository>
+  </repositories>
+
+  <properties>
+    <flex.version>4.1.0.16076</flex.version>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.threerings</groupId>
+      <artifactId>aspirin</artifactId>
+      <version>1.9</version>
+      <type>swc</type>
+    </dependency>
+    <dependency>
+      <groupId>flexlib</groupId>
+      <artifactId>flexlib-bin</artifactId>
+      <version>2.4</version>
+      <type>swc</type>
+    </dependency>
+    <dependency>
+      <groupId>as3isolib</groupId>
+      <artifactId>as3isolib-fp9</artifactId>
+      <version>r298</version>
+      <type>swc</type>
+    </dependency>
+    <dependency>
+      <groupId>com.threerings</groupId>
+      <artifactId>naryalib</artifactId>
+      <version>1.11</version>
+      <type>swc</type>
+    </dependency>
+    <!-- needed for the build, but not an exported dependency -->
+    <dependency>
+      <groupId>com.adobe.flex.framework</groupId>
+      <artifactId>flex-framework</artifactId>
+      <version>${flex.version}</version>
+      <type>pom</type>
+      <optional>true</optional>
+    </dependency>
+  </dependencies>
+
+  <pluginRepositories>
+    <pluginRepository>
+      <id>flexmojos</id>
+      <url>http://repository.sonatype.org/content/groups/flexgroup/</url>
+    </pluginRepository>
+  </pluginRepositories>
+
+  <build>
+    <sourceDirectory>src/main/as</sourceDirectory>
+    <plugins>
+      <plugin>
+        <groupId>org.sonatype.flexmojos</groupId>
+        <artifactId>flexmojos-maven-plugin</artifactId>
+        <extensions>true</extensions>
+        <version>4.2-beta</version>
+        <configuration>
+          <omitTraceStatements>false</omitTraceStatements>
+          <debug>true</debug>
+          <incremental>false</incremental>
+          <useNetwork>false</useNetwork>
+          <verboseStacktraces>true</verboseStacktraces>
+          <!-- we've never shown them in the Ant build, why start now? -->
+          <showWarnings>false</showWarnings>
+        </configuration>
+        <dependencies>
+          <dependency>
+            <groupId>com.adobe.flex</groupId>
+            <artifactId>compiler</artifactId>
+            <version>${flex.version}</version>
+            <type>pom</type>
+          </dependency>
+          <dependency>
+            <groupId>com.adobe.flex.compiler</groupId>
+            <artifactId>asdoc</artifactId>
+            <version>${flex.version}</version>
+            <classifier>template</classifier>
+            <type>zip</type>
+          </dependency>
+        </dependencies>
+      </plugin>
+    </plugins>
+  </build>
+</project>

aslib/src/main/as/com/threerings/cast/ActionFrames.as

@@ -0,0 +1,73 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.display.DisplayObject;
+
+/**
+ * Encapsulates a set of frames in each of {@link
+ * DirectionCodes#DIRECTION_COUNT} orientations that are used to render a
+ * character sprite.
+ */
+public interface ActionFrames
+{
+    /**
+     * Returns the number of orientations available in this set of action
+     * frames.
+     */
+    function getOrientationCount () :int;
+
+    /**
+     * Returns the multi-frame image that comprises the frames for the
+     * specified orientation.
+     */
+    function getFrames (orient :int, callback :Function) :void;
+
+    /**
+     * Returns the x offset from the upper left of the image to the
+     * "origin" for this character frame. A sprite with location (x, y)
+     * will be rendered such that its origin is coincident with that
+     * location.
+     */
+    function getXOrigin (orient :int, frameIdx :int) :int;
+
+    /**
+     * Returns the y offset from the upper left of the image to the
+     * "origin" for this character frame. A sprite with location (x, y)
+     * will be rendered such that its origin is coincident with that
+     * location.
+     */
+    function getYOrigin (orient :int, frameIdx :int) :int;
+
+    /**
+     * Creates a clone of these action frames which will have the supplied
+     * colorizations applied to the frame images.
+     */
+    function cloneColorized (zations :Array) :ActionFrames;
+
+    /**
+     * Creates a clone of these action frames which will have the supplied
+     * translation applied to the frame images.
+     */
+    function cloneTranslated (dx :int, dy :int) :ActionFrames;
+}
+}

aslib/src/main/as/com/threerings/cast/ActionSequence.as

@@ -0,0 +1,108 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.geom.Point;
+
+import com.threerings.media.tile.SwissArmyTileSet;
+import com.threerings.util.DirectionUtil;
+import com.threerings.util.StringUtil;
+
+/**
+ * The action sequence class describes a particular character animation
+ * sequence. An animation sequence consists of one or more frames of
+ * animation, renders at a particular frame rate, and has an origin point
+ * that specifies the location of the base of the character in relation to
+ * the bounds of the animation images.
+ */
+public class ActionSequence
+{
+    /**
+     * Defines the name of the default action sequence. When component
+     * tilesets are loaded to build a set of composited images for a
+     * particular action sequence, a check is first made for a component
+     * tileset specific to the action sequence and then for the
+     * component's default tileset if the action specific tileset did not
+     * exist.
+     */
+    public static const DEFAULT_SEQUENCE :String = "default";
+
+    /** The action sequence name. */
+    public var name :String;
+
+    /** The number of frames per second to show when animating. */
+    public var framesPerSecond :Number;
+
+    /** The position of the character's base for this sequence. */
+    public var origin :Point = new Point();
+
+    public var tileset :SwissArmyTileSet;
+
+    /** Orientation codes for the orientations available for this
+     * action. */
+    public var orients :Array;
+
+    public static function fromXml (xml :XML) :ActionSequence
+    {
+        var seq :ActionSequence = new ActionSequence();
+        seq.name = xml.@name;
+        seq.framesPerSecond = xml.framesPerSecond;
+        seq.orients = toOrientArray(xml.orients);
+        seq.origin = toPoint(xml.origin);
+        seq.tileset = SwissArmyTileSet.fromXml(xml.tileset[0]);
+
+        return seq;
+    }
+
+    protected static function toOrientArray (str :String) :Array
+    {
+        if (str == null || str.length == 0) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :String, index :int, arr :Array) :int {
+                return DirectionUtil.fromShortString(StringUtil.trim(element));
+            });
+    }
+
+    protected static function toPoint (str :String) :Point
+    {
+        if (str == null || str.length == 0) {
+            return null;
+        }
+
+        var coords :Array =
+            str.split(",").map(function(element :String, index :int, arr :Array) :int {
+                return int(StringUtil.trim(element));
+            });
+
+        return new Point(coords[0], coords[1]);
+    }
+
+    public function toString () :String
+    {
+        return "[name=" + name + ", framesPerSecond=" + framesPerSecond +
+            ", origin=" + origin +
+            ", orients=" + (orients == null ? 0 : orients.length) + "]";
+    }
+}
+}

aslib/src/main/as/com/threerings/cast/CharacterComponent.as

@@ -0,0 +1,145 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import com.threerings.util.Hashable;
+import com.threerings.util.Equalable;
+import com.threerings.util.Set;
+import com.threerings.util.StringUtil;
+
+/**
+ * The character component represents a single component that can be composited with other
+ * character components to generate an image representing a complete character displayable in any
+ * of the eight compass directions as detailed in the {@link Sprite} class direction constants.
+ */
+public class CharacterComponent
+    implements Equalable, Hashable
+{
+    /** The unique component identifier. */
+    public var componentId :int;
+
+    /** The component's name. */
+    public var name :String;
+
+    /** The class of components to which this one belongs. */
+    public var componentClass :ComponentClass;
+
+    /**
+     * Constructs a character component with the specified id of the specified class.
+     */
+    public function CharacterComponent (
+        componentId :int, name :String, compClass :ComponentClass, fprov :FrameProvider)
+    {
+        this.componentId = componentId;
+        this.name = name;
+        this.componentClass = compClass;
+        _frameProvider = fprov;
+    }
+
+    public function setFrameProvider (frameProvider :FrameProvider) :void
+    {
+        _frameProvider = frameProvider;
+
+        // Notify them all and clear our list.
+        for each (var func :Function in _notifyOnLoad) {
+            func(this);
+        }
+        _notifyOnLoad = [];
+    }
+
+    /**
+     * Returns the render priority appropriate for this component at the specified action and
+     * orientation.
+     */
+    public function getRenderPriority (action :String, orientation :int) :int
+    {
+        return componentClass.getRenderPriority(action, name, orientation);
+    }
+
+    /**
+     * Returns the image frames for the specified action animation or null if no animation for the
+     * specified action is available for this component.
+     *
+     * @param type null for the normal action frames or one of the custom action sub-types:
+     * {@link StandardActions#SHADOW_TYPE}, etc.
+     */
+    public function getFrames (action :String, type :String) :ActionFrames
+    {
+        return isLoaded() ? _frameProvider.getFrames(this, action, type) : null;
+    }
+
+    /**
+     * Returns the path to the image frames for the specified action animation or null if no
+     * animation for the specified action is available for this component.
+     *
+     * @param type null for the normal action frames or one of the custom action sub-types:
+     * {@link StandardActions#SHADOW_TYPE}, etc.
+     *
+     * @param existentPaths the set of all paths for which there are valid frames.
+     */
+    public function getFramePath (action :String, type :String, existentPaths :Set) :String
+    {
+        return _frameProvider.getFramePath(this, action, type, existentPaths);
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        if (other is CharacterComponent) {
+            return componentId == (CharacterComponent(other)).componentId;
+        } else {
+            return false;
+        }
+    }
+
+    public function hashCode () :int
+    {
+    	return componentId;
+    }
+
+    public function toString () :String
+    {
+        return StringUtil.simpleToString(this);
+    }
+
+    public function isLoaded () :Boolean
+    {
+        return _frameProvider != null;
+    }
+
+    public function notifyOnLoad (func :Function) :void
+    {
+        if (isLoaded()) {
+            func(this);
+        } else {
+            _notifyOnLoad.push(func);
+        }
+    }
+
+
+
+    /** The entity from which we obtain our animation frames. */
+    protected var _frameProvider :FrameProvider;
+
+    /** Everyone who cares when we're loaded. */
+    protected var _notifyOnLoad :Array = [];
+}
+}

aslib/src/main/as/com/threerings/cast/CharacterDescriptor.as

@@ -0,0 +1,160 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import com.threerings.media.image.Colorization;
+import com.threerings.util.Arrays;
+import com.threerings.util.Equalable;
+import com.threerings.util.Hashable;
+import com.threerings.util.StringUtil;
+
+/**
+ * The character descriptor object details the components that are
+ * pieced together to create a single character image.
+ */
+public class CharacterDescriptor
+    implements Equalable, Hashable
+{
+    /**
+     * Constructs a character descriptor.
+     *
+     * @param components the component ids of the individual components
+     * that make up this character.
+     * @param zations the colorizations to apply to each of the character
+     * component images when compositing actions (an array of
+     * colorizations for each component, elements of which can be null to
+     * make it easier to support per-component specialized colorizations).
+     * This can be null if image recolorization is not desired.
+     */
+    public function CharacterDescriptor (components :Array, zations :Array)
+    {
+        _components = components;
+        _zations = zations;
+    }
+
+    /**
+     * Returns an array of the component identifiers comprising the
+     * character described by this descriptor.
+     */
+    public function getComponentIds () :Array
+    {
+        return _components;
+    }
+
+    /**
+     * Returns an array of colorization arrays to be applied to the
+     * components when compositing action images (one array per
+     * component).
+     */
+    public function getColorizations () :Array
+    {
+        return _zations;
+    }
+
+    /**
+     * Updates the colorizations to be used by this character descriptor.
+     */
+    public function setColorizations (zations :Array) :void
+    {
+        _zations = zations;
+    }
+
+    /**
+     * Returns the array of translations to be applied to the components
+     * when compositing action images.
+     */
+    public function getTranslations () :Array
+    {
+        return _xlations;
+    }
+
+    /**
+     * Updates the translations to be used by this character descriptor.
+     */
+    public function setTranslations (xlations :Array) :void
+    {
+        _xlations = xlations;
+    }
+
+    public function hashCode () :int
+    {
+        var code :int = 0;
+        var clength :int = _components.length;
+        for (var ii :int = 0; ii < clength; ii++) {
+            code ^= _components[ii];
+        }
+        return code;
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        if (!(other is CharacterDescriptor)) {
+            return false;
+        }
+
+        // both the component ids and the colorizations must be equal
+        var odesc :CharacterDescriptor = CharacterDescriptor(other);
+        if (!Arrays.equals(_components, odesc._components)) {
+            return false;
+        }
+
+        var zations :Array = odesc._zations;
+        if (zations == null && _zations == null) {
+            // if neither has colorizations, we're clear
+            return true;
+
+        } else if (zations == null || _zations == null) {
+            // if one has colorizations whilst the other doesn't, they
+            // can't be equal
+            return false;
+        }
+
+        // otherwise, all of the colorizations must be equal as well
+        var zlength :int= zations.length;
+        if (zlength != _zations.length) {
+            return false;
+        }
+        for (var ii :int= 0; ii < zlength; ii++) {
+            if (!Arrays.equals(_zations[ii], zations[ii])) {
+                return false;
+            }
+        }
+
+        return Arrays.equals(_xlations, odesc._xlations);
+    }
+
+    public function toString () :String
+    {
+        return "[cids=" + StringUtil.toString(_components) +
+            ", colors=" + StringUtil.toString(_zations) + "]";
+    }
+
+    /** The component identifiers comprising the character. */
+    protected var _components :Array;
+
+    /** The colorizations to apply when compositing this character. */
+    protected var _zations :Array;
+
+    /** The translations to apply when compositing this character. */
+    protected var _xlations :Array;
+}
+}

aslib/src/main/as/com/threerings/cast/CharacterManager.as

@@ -0,0 +1,292 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.geom.Point;
+
+import com.threerings.util.Hashable;
+import com.threerings.util.Log;
+import com.threerings.util.Map;
+import com.threerings.util.StringUtil;
+import com.threerings.util.Maps;
+import com.threerings.util.maps.LRMap;
+
+/**
+ * The character manager provides facilities for constructing sprites that
+ * are used to represent characters in a scene. It also handles the
+ * compositing and caching of composited character animations.
+ */
+public class CharacterManager
+{
+    private static var log :Log = Log.getLog(CharacterManager);
+
+    /**
+     * Constructs the character manager.
+     */
+    public function CharacterManager (crepo :ComponentRepository)
+    {
+        // keep this around
+        _crepo = crepo;
+
+        for each (var action :ActionSequence in crepo.getActionSequences()) {
+            _actions.put(action.name, action);
+        }
+    }
+
+    /**
+     * Returns a {@link CharacterSprite} representing the character
+     * described by the given {@link CharacterDescriptor}, or
+     * <code>null</code> if an error occurs.
+     *
+     * @param desc the character descriptor.
+     */
+    public function getCharacter (desc :CharacterDescriptor,
+        charClass :Class = null) :CharacterSprite
+    {
+        if (charClass == null) {
+            charClass = _charClass;
+        }
+
+        try {
+            var sprite :CharacterSprite = new charClass();
+            sprite.init(desc, this);
+            return sprite;
+
+        } catch (e :Error) {
+            log.warning("Failed to instantiate character sprite.", e);
+            return null;
+        }
+        return getCharacter(desc, charClass);
+    }
+
+    public function getActionSequence (action :String) :ActionSequence
+    {
+        return _actions.get(action);
+    }
+
+    public function getComponent (compId :int) :CharacterComponent
+    {
+        return _crepo.getComponent(compId);
+    }
+
+    public function getComponentByName (cclass :String, cname :String) :CharacterComponent
+    {
+        return _crepo.getComponentByName(cclass, cname);
+    }
+
+    public function getActionFrames (descrip :CharacterDescriptor, action :String) :ActionFrames
+    {
+        if (!isLoaded(descrip)) {
+            return null;
+        }
+
+        var key :FrameKey = new FrameKey(descrip, action);
+
+        var frames :ActionFrames = _actionFrames.get(key);
+        if (frames == null) {
+            // this doesn't actually composite the images, but prepares an
+            // object to be able to do so
+            frames = createCompositeFrames(descrip, action);
+            _actionFrames.put(key, frames);
+        }
+
+        return frames;
+    }
+
+    /**
+     * Returns whether all the components are loaded and ready to go.
+     */
+    protected function isLoaded (descrip :CharacterDescriptor) :Boolean
+    {
+        var cids :Array = descrip.getComponentIds();
+        var ccount :int = cids.length;
+
+        for (var ii :int = 0; ii < ccount; ii++) {
+            var ccomp :CharacterComponent = _crepo.getComponent(cids[ii]);
+            if (!ccomp.isLoaded()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function load (descrip :CharacterDescriptor, notify :Function) :void
+    {
+        _crepo.load(descrip.getComponentIds(), notify);
+    }
+
+    protected function createCompositeFrames (descrip :CharacterDescriptor,
+        action :String) :ActionFrames
+    {
+        var cids :Array = descrip.getComponentIds();
+        var ccount :int = cids.length;
+
+        var zations :Array = descrip.getColorizations();
+        var xlations :Array = descrip.getTranslations();
+
+        log.debug("Compositing action [action=" + action +
+                  ", descrip=" + descrip + "].");
+
+        // this will be used to construct any shadow layers
+        var shadows :Map = null; /* of String, Array<TranslatedComponent> */
+
+        // maps components by class name for masks
+        var ccomps :Map = Maps.newMapOf(String); /* of String, ArrayList<TranslatedComponent> */
+
+        // create colorized versions of all of the source action frames
+        var sources :Array = [];
+        for (var ii :int = 0; ii < ccount; ii++) {
+            var cframes :ComponentFrames = new ComponentFrames();
+            sources.push(cframes);
+            var ccomp :CharacterComponent = cframes.ccomp = _crepo.getComponent(cids[ii]);
+
+            // load up the main component images
+            var source :ActionFrames = ccomp.getFrames(action, null);
+            if (source == null) {
+                var errmsg :String = "Cannot composite action frames; no such " +
+                    "action for component [action=" + action +
+                    ", desc=" + descrip + ", comp=" + ccomp + "]";
+                throw new Error(errmsg);
+            }
+            source = (zations == null || zations[ii] == null) ?
+                source : source.cloneColorized(zations[ii]);
+            var xlation :Point = (xlations == null) ? null : xlations[ii];
+            cframes.frames = (xlation == null) ?
+                source : source.cloneTranslated(xlation.x, xlation.y);
+
+            // store the component with its translation under its class for masking
+            var tcomp :TranslatedComponent = new TranslatedComponent(ccomp, xlation);
+            var tcomps :Array = ccomps.get(ccomp.componentClass.name);
+            if (tcomps == null) {
+                ccomps.put(ccomp.componentClass.name, tcomps = []);
+            }
+            tcomps.push(tcomp);
+
+            // if this component has a shadow, make a note of it
+            if (ccomp.componentClass.isShadowed()) {
+                if (shadows == null) {
+                    shadows = Maps.newMapOf(String);
+                }
+                var shadlist :Array = shadows.get(ccomp.componentClass.shadow);
+                if (shadlist == null) {
+                    shadows.put(ccomp.componentClass.shadow, shadlist = []);
+                }
+                shadlist.push(tcomp);
+            }
+        }
+
+/* TODO - Implement shadows & masks - I don't actually know if/where we use these, though.
+        // now create any necessary shadow layers
+        if (shadows != null) {
+            for (Map.Entry<String, ArrayList<TranslatedComponent>> entry : shadows.entrySet()) {
+                ComponentFrames scf = compositeShadow(action, entry.getKey(), entry.getValue());
+                if (scf != null) {
+                    sources.add(scf);
+                }
+            }
+        }
+
+        // add any necessary masks
+        for (ComponentFrames cframes : sources) {
+            ArrayList<TranslatedComponent> mcomps = ccomps.get(cframes.ccomp.componentClass.mask);
+            if (mcomps != null) {
+                cframes.frames = compositeMask(action, cframes.ccomp, cframes.frames, mcomps);
+            }
+        }
+*/
+        // use those to create an entity that will lazily composite things
+        // together as they are needed
+        return new CompositedActionFrames(_frameCache, _actions.get(action), sources);
+    }
+
+    protected var _crepo :ComponentRepository;
+
+    protected var _actions :Map = Maps.newMapOf(String);
+
+    protected var _actionFrames :Map = Maps.newMapOf(FrameKey);
+
+    protected var _frameCache :LRMap = new LRMap(Maps.newMapOf(CompositedFramesKey), MAX_FRAMES);
+
+    protected var _charClass :Class;
+
+    protected static const MAX_FRAMES :int = 1000;
+}
+}
+
+import com.threerings.util.Hashable;
+import com.threerings.util.StringUtil;
+import com.threerings.cast.CharacterDescriptor;
+
+class FrameKey
+    implements Hashable
+{
+    public var desc :CharacterDescriptor;
+
+    public var action :String;
+
+    public function FrameKey (desc :CharacterDescriptor, action :String)
+    {
+        this.desc = desc;
+        this.action = action;
+    }
+
+    public function hashCode () :int
+    {
+        return desc.hashCode() ^ StringUtil.hashCode(action);
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        if (other is FrameKey) {
+            var okey :FrameKey = FrameKey(other);
+            return okey.desc.equals(desc) && okey.action == action;
+        } else {
+            return false;
+        }
+    }
+}
+
+import flash.geom.Point;
+
+import com.threerings.cast.ActionFrames;
+import com.threerings.cast.CharacterComponent;
+
+class TranslatedComponent
+{
+    public var ccomp :CharacterComponent;
+    public var xlation :Point;
+
+    public function TranslatedComponent (ccomp :CharacterComponent, xlation :Point)
+    {
+        this.ccomp = ccomp;
+        this.xlation = xlation;
+    }
+
+    public function getFrames (action :String, type :String) :ActionFrames
+    {
+        var frames :ActionFrames = ccomp.getFrames(action, type);
+        return (frames == null || xlation == null) ?
+            frames : frames.cloneTranslated(xlation.x, xlation.y);
+    }
+
+}

aslib/src/main/as/com/threerings/cast/CharacterSprite.as

@@ -0,0 +1,317 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.display.DisplayObject;
+import flash.display.Sprite;
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import com.threerings.display.DisplayUtil;
+import com.threerings.media.Tickable;
+import com.threerings.util.DirectionCodes;
+import com.threerings.util.Log;
+
+/**
+ * A character sprite is a sprite that animates itself while walking
+ * about in a scene.
+ */
+public class CharacterSprite extends Sprite
+    implements Tickable
+{
+    private static var log :Log = Log.getLog(CharacterSprite);
+
+    /**
+     * Initializes this character sprite with the specified character
+     * descriptor and character manager. It will obtain animation data
+     * from the supplied character manager.
+     */
+    public function init (descrip :CharacterDescriptor, charmgr :CharacterManager) :void
+    {
+        // keep track of this stuff
+        _descrip = descrip;
+        _charmgr = charmgr;
+
+        // sanity check our values
+        sanityCheckDescrip();
+
+        // assign an arbitrary starting orientation
+        _orient = DirectionCodes.SOUTHWEST;
+
+        // pass the buck to derived classes
+        didInit();
+
+        halt();
+
+        updateActionFrames();
+    }
+
+    public function tick (tickStamp :int) :void
+    {
+        if (_framesBitmap != null) {
+            _framesBitmap.tick(tickStamp);
+        }
+    }
+
+    /**
+     * Called after this sprite has been initialized with its character
+     * descriptor and character manager. Derived classes can do post-init
+     * business here.
+     */
+    protected function didInit () :void
+    {
+        _mainSprite = new Sprite();
+        addChild(_mainSprite);
+    }
+
+    /**
+     * Reconfigures this sprite to use the specified character descriptor.
+     */
+    public function setCharacterDescriptor (descrip :CharacterDescriptor) :void
+    {
+        // keep the new descriptor
+        _descrip = descrip;
+
+        // sanity check our values
+        sanityCheckDescrip();
+
+        // update our action frames
+        updateActionFrames();
+    }
+
+    /**
+     * Specifies the action to use when the sprite is at rest. The default
+     * is <code>STANDING</code>.
+     */
+    public function setRestingAction (action :String) :void
+    {
+        _restingAction = action;
+    }
+
+    /**
+     * Returns the action to be used when the sprite is at rest. Derived
+     * classes may wish to override this method and vary the action based
+     * on external parameters (or randomly).
+     */
+    public function getRestingAction () :String
+    {
+        return _restingAction;
+    }
+
+    /**
+     * Specifies the action to use when the sprite is following a path.
+     * The default is <code>WALKING</code>.
+     */
+    public function setFollowingPathAction (action :String) :void
+    {
+        _followingPathAction = action;
+    }
+
+    /**
+     * Returns the action to be used when the sprite is following a path.
+     * Derived classes may wish to override this method and vary the
+     * action based on external parameters (or randomly).
+     */
+    public function getFollowingPathAction () :String
+    {
+        return _followingPathAction;
+    }
+
+    /**
+     * Sets the action sequence used when rendering the character, from
+     * the set of available sequences.
+     */
+    public function setActionSequence (action :String) :void
+    {
+        // sanity check
+        if (action == null) {
+            log.warning("Refusing to set null action sequence " + this + ".", new Error());
+            return;
+        }
+
+        // no need to noop
+        if (action == _action) {
+            return;
+        }
+        _action = action;
+        updateActionFrames();
+    }
+
+    public function setOrientation (orient :int) :void
+    {
+        var oorient :int = _orient;
+        _orient = orient;
+        if (orient < 0 || orient >= DirectionCodes.FINE_DIRECTION_COUNT) {
+            log.info("Refusing to set invalid orientation [sprite=" + this +
+                     ", orient=" + orient + "].", new Error());
+            return;
+        }
+
+        if (_orient != oorient) {
+            updateMainSprite();
+        }
+    }
+
+    public function getOrientation () :int
+    {
+        return _orient;
+    }
+
+    public function cancelMove () :void
+    {
+        halt();
+    }
+
+    public function pathBeginning () :void
+    {
+        // enable walking animation
+        setActionSequence(getFollowingPathAction());
+    }
+
+    public function pathCompleted (timestamp :int) :void
+    {
+        halt();
+    }
+
+    /**
+     * Rebuilds our action frames given our current character descriptor
+     * and action sequence. This is called when either of those two things
+     * changes.
+     */
+    protected function updateActionFrames () :void
+    {
+        // get a reference to the action sequence so that we can obtain
+        // our animation frames and configure our frames per second
+        var actseq :ActionSequence = _charmgr.getActionSequence(_action);
+        if (actseq == null) {
+            var errmsg :String = "No such action '" + _action + "'.";
+            throw new Error(errmsg);
+        }
+
+        try {
+            // obtain our animation frames for this action sequence
+            _aframes = _charmgr.getActionFrames(_descrip, _action);
+
+            if (_aframes == null) {
+                // Once the frames are really ready to go, we'll do this...
+                _charmgr.load(_descrip, updateActionFrames);
+            }
+
+            updateMainSprite();
+
+        } catch (nsce :NoSuchComponentError) {
+            log.warning("Character sprite references non-existent " +
+                        "component [sprite=" + this + ", err=" + nsce + "].");
+
+        } catch (e :Error) {
+            log.warning("Failed to obtain action frames [sprite=" + this +
+                        ", descrip=" + _descrip + ", action=" + _action + "].", e);
+        }
+
+        x = -actseq.origin.x;
+        y = -actseq.origin.y;
+    }
+
+    protected function updateMainSprite () :void
+    {
+        DisplayUtil.removeAllChildren(_mainSprite);
+        if (_aframes != null) {
+            updateWithUnloadedSprite();
+            var curFrames :ActionFrames = _aframes;
+            _aframes.getFrames(_orient, function(frames :MultiFrameBitmap) :void {
+                // Ensure our action hasn't been swapped out on us since we started loading.
+                if (_aframes == curFrames) {
+                    _framesBitmap = frames;
+                    DisplayUtil.removeAllChildren(_mainSprite);
+                    _mainSprite.addChild(frames);
+                }
+            });
+        } else {
+            _framesBitmap = null;
+            updateWithUnloadedSprite();
+        }
+    }
+
+    protected function updateWithUnloadedSprite () :void
+    {
+        // Nothing by default.
+    }
+
+    /**
+     * Makes it easier to track down problems with bogus character descriptors.
+     */
+    protected function sanityCheckDescrip () :void
+    {
+        if (_descrip.getComponentIds() == null ||
+            _descrip.getComponentIds().length == 0) {
+            log.warning("Invalid character descriptor [sprite=" + this +
+                        ", descrip=" + _descrip + "].", new Error());
+        }
+    }
+
+    /**
+     * Updates the sprite animation frame to reflect the cessation of
+     * movement and disables any further animation.
+     */
+    protected function halt () :void
+    {
+        var rest :String = getRestingAction();
+        if (rest != null) {
+            setActionSequence(rest);
+        }
+    }
+
+    public function hitTest (stageX :int, stageY :int) :Boolean
+    {
+        return _framesBitmap == null ? false : _framesBitmap.hitTest(stageX, stageY);
+    }
+
+    /** The action to use when at rest. */
+    protected var _restingAction :String = StandardActions.STANDING;
+
+    /** The action to use when following a path. */
+    protected var _followingPathAction :String = StandardActions.WALKING;
+
+    /** A reference to the descriptor for the character that we're
+     * visualizing. */
+    protected var _descrip :CharacterDescriptor;
+
+    /** A reference to the character manager that created us. */
+    protected var _charmgr :CharacterManager;
+
+    /** The action we are currently displaying. */
+    protected var _action :String;
+
+    /** The animation frames for the active action sequence in each
+     * orientation. */
+    protected var _aframes :ActionFrames;
+
+    /** The currently active set of bitmaps for this character. */
+    protected var _framesBitmap :MultiFrameBitmap;
+
+    /** The orientation of this sprite. */
+    protected var _orient :int = DirectionCodes.NONE;
+
+    protected var _mainSprite :Sprite;
+}
+}

aslib/src/main/as/com/threerings/cast/ComponentClass.as

@@ -0,0 +1,198 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import com.threerings.util.Arrays;
+import com.threerings.util.Hashable;
+import com.threerings.util.Equalable;
+import com.threerings.util.StringUtil;
+
+/**
+ * Denotes a class of components to which {@link CharacterComponent}
+ * objects belong. Examples include "Hat", "Head", and "Feet". A component
+ * class dictates a component's rendering priority so that components can
+ * be rendered in an order that causes them to overlap properly.
+ *
+ * <p> Components support render priority overrides for particular
+ * actions, orientations or combinations of actions and orientations. The
+ * system is currently structured with the expectation that the overrides
+ * will be relatively few (less than fifteen, say) for any given component
+ * class. A system that relied on many overrides for its components would
+ * want to implement a more scalable algorithm for determining which, if
+ * any, override matches a particular action and orientation combination.
+ */
+public class ComponentClass
+    implements Equalable, Hashable
+{
+    /** The component class name. */
+    public var name :String;
+
+    /** The default render priority. */
+    public var renderPriority :int;
+
+    /** The color classes to use when recoloring components of this class. May
+     * be null if a system does not use recolorable components. */
+    public var colors :Array;
+
+    /** The class name of the layer from which this component class obtains a
+     * mask to limit rendering to certain areas. */
+    public var mask :String;
+
+    /** Indicates the class name of the shadow layer to which this component
+     * class contributes a shadow. */
+    public var shadow :String;
+
+    /** 1.0 for a normal component, the alpha value of the pre-composited
+     * shadow for the special "shadow" component class. */
+    public var shadowAlpha :Number = 1.0;
+
+    /** Whether or not components of this class will have translations applied. */
+    public var translate :Boolean;
+
+    /**
+     * Creates an uninitialized instance suitable for unserialization or
+     * population during XML parsing.
+     */
+    public function ComponentClass ()
+    {
+    }
+
+    public static function fromXml (xml :XML) :ComponentClass
+    {
+        var compClass :ComponentClass = new ComponentClass();
+        compClass.name = xml.@name;
+        compClass.renderPriority = xml.@renderPriority;
+        compClass.colors = toStrArray(xml.@colors);
+        compClass.mask = xml.@mask;
+        compClass.shadow = xml.@shadow;
+        compClass.shadowAlpha = xml.@shadowAlpha;
+        compClass.translate = xml.@translate;
+        for each (var overrideXml :XML in xml.override) {
+            compClass.addPriorityOverride(PriorityOverride.fromXml(overrideXml));
+        }
+        return compClass;
+    }
+
+    protected static function toStrArray (str :String) :Array
+    {
+        if (str == null || str.length == 0) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :String, index :int, arr :Array) :String {
+                return StringUtil.trim(element);
+            });
+    }
+
+    /**
+     * Returns the render priority appropriate for the specified action, orientation and
+     * component.
+     */
+    public function getRenderPriority (action :String, component :String, orientation :int) :int
+    {
+        // because we expect there to be relatively few priority overrides, we simply search
+        // linearly through the list for the closest match
+        var ocount :int = (_overrides != null) ? _overrides.length : 0;
+        for (var ii :int = 0; ii < ocount; ii++) {
+            var over :PriorityOverride = _overrides[ii];
+            // based on the way the overrides are sorted, the first match
+            // is the most specific and the one we want
+            if (over.matches(action, component, orientation)) {
+                return over.renderPriority;
+            }
+        }
+
+        return renderPriority;
+    }
+
+    /**
+     * Adds the supplied render priority override record to this component class.
+     */
+    public function addPriorityOverride (override :PriorityOverride) :void
+    {
+        if (_overrides == null) {
+            _overrides = [];
+        }
+        Arrays.sortedInsert(_overrides, override);
+    }
+
+    /**
+     * Returns true if this component class contributes a shadow to a
+     * particular shadow layer. Note: this is different from <em>being</em> a
+     * shadow layer which is determined by calling {@link #isShadow}.
+     */
+    public function isShadowed () :Boolean
+    {
+        return (shadow != null);
+    }
+
+    /**
+     * Returns true if this component class is a shadow layer rather than a normal component class.
+     */
+    public function isShadow () :Boolean
+    {
+        return (shadowAlpha != 1.0);
+    }
+
+    /**
+     * Classes with the same name are the same.
+     */
+    public function equals (other :Object) :Boolean
+    {
+        if (other is ComponentClass) {
+            return name == (ComponentClass(other)).name;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Hashcode is based on component class name.
+     */
+    public function hashCode () :int
+    {
+        return StringUtil.hashCode(name);
+    }
+
+    public function toString () :String
+    {
+        var buf :String = "[";
+        buf = buf.concat("name=", name);
+        buf = buf.concat(", pri=", renderPriority);
+        if (colors != null) {
+            buf = buf.concat(", colors=", StringUtil.toString(colors));
+        }
+        if (mask != null) {
+            buf = buf.concat(", mask=", mask);
+        }
+        if (shadowAlpha != 1.0) {
+            buf = buf.concat(", shadow=", shadowAlpha);
+        } else if (shadow != null) {
+            buf = buf.concat(", shadow=", shadow);
+        }
+        return buf.concat("]");
+    }
+
+    /** A list of render priority overrides. */
+    protected var _overrides :Array = [];
+}
+}

aslib/src/main/as/com/threerings/cast/ComponentDataPack.as

@@ -0,0 +1,163 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.display.Bitmap;
+import flash.display.BitmapData;
+import flash.display.DisplayObject;
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import flash.events.Event;
+
+import flash.utils.ByteArray;
+
+import nochump.util.zip.ZipEntry;
+import nochump.util.zip.ZipError;
+import nochump.util.zip.ZipFile;
+
+import com.threerings.media.image.PngRecolorUtil;
+import com.threerings.media.tile.TileDataPack;
+import com.threerings.media.tile.TileSet;
+import com.threerings.util.DataPack;
+import com.threerings.util.Log;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.util.MultiLoader;
+import com.threerings.util.Set;
+import com.threerings.util.StringUtil;
+
+/**
+ * Like a normal data pack, but we don't deal with any data, and all our filenames are a direct
+ *  translation, so we need no metadata file.  We also serve as a tile ImageProvider.
+ */
+public class ComponentDataPack extends TileDataPack
+    implements FrameProvider
+{
+    private static var log :Log = Log.getLog(ComponentDataPack);
+
+    public function ComponentDataPack (source :Object, actions :Map,
+        completeListener :Function = null, errorListener :Function = null)
+    {
+        super(source, completeListener, errorListener);
+        _actions = actions;
+    }
+
+    // Documentation inherited from interface
+    public function getFrames (component :CharacterComponent, action :String,
+        type :String) :ActionFrames
+    {
+        // obtain the action sequence definition for this action
+        var actseq :ActionSequence = _actions.get(action);
+        if (actseq == null) {
+            log.warning("Missing action sequence definition [action=" + action +
+                        ", component=" + component + "].");
+            return null;
+        }
+
+        // determine our image path name
+        var imgpath :String = action;
+        var dimgpath :String = ActionSequence.DEFAULT_SEQUENCE;
+        if (type != null) {
+            imgpath += "_" + type;
+            dimgpath += "_" + type;
+        }
+
+        var root :String = component.componentClass.name + "/" + component.name + "/";
+        var cpath :String = root + imgpath + ".png";
+        var dpath :String = root + dimgpath + ".png";
+
+        // look to see if this tileset is already cached (as the custom action or the default
+        // action)
+        var aset :TileSet = _setcache.get(cpath);
+        if (aset == null) {
+            aset = _setcache.get(dpath);
+            if (aset != null) {
+                // save ourselves a lookup next time
+                _setcache.put(cpath, aset);
+            }
+        }
+
+        try {
+            // then try loading up a tileset customized for this action
+            if (aset == null) {
+                if (_zip.getEntry(cpath)) {
+                    aset = TileSet(actseq.tileset.clone());
+                    aset.setImagePath(cpath);
+                } else if (_zip.getEntry(dpath)) {
+                    actseq = _actions.get(ActionSequence.DEFAULT_SEQUENCE);
+                    aset = TileSet(actseq.tileset.clone());
+                    aset.setImagePath(dpath);
+                    _setcache.put(dpath, aset);
+                }
+            }
+
+            // if that failed too, we're hosed
+            if (aset == null) {
+                // if this is a shadow or crop image, no need to freak out as they are optional
+                if (!StandardActions.CROP_TYPE == type &&
+                    !StandardActions.SHADOW_TYPE == type) {
+                    log.warning("Unable to locate tileset for action '" + imgpath + "' " +
+                                component + ".");
+                }
+                return null;
+            }
+
+            aset.setImageProvider(this);
+            _setcache.put(cpath, aset);
+            return new TileSetFrameImage(aset, actseq);
+
+        } catch (e :Error) {
+            log.warning("Error loading tset for action '" + imgpath + "' " + component + ".", e);
+        }
+
+        return null;
+    }
+
+    // Documentation inherited from interface
+    public function getFramePath (
+        component :CharacterComponent, action :String, type :String, existentPaths :Set) :String
+    {
+        var actionPath :String = makePath(component, action, type);
+        if (!existentPaths.contains(actionPath)) {
+            return makePath(component, ActionSequence.DEFAULT_SEQUENCE, type);
+        }
+        return actionPath;
+    }
+
+    protected function makePath (component :CharacterComponent, action :String,
+        type :String) :String
+    {
+        var imgpath :String = action;
+        if (type != null) {
+            imgpath += "_" + type;
+        }
+        var root :String = component.componentClass.name + "/" + component.name + "/";
+        return root + imgpath + ".png";
+    }
+
+    protected var _actions :Map;
+
+    protected var _setcache :Map = Maps.newMapOf(String);
+}
+}

aslib/src/main/as/com/threerings/cast/ComponentFrames.as

@@ -0,0 +1,42 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+/** Used to associate a {@link CharacterComponent} with its {@link
+ * ActionFrames} for a particular action. */
+public class ComponentFrames
+{
+    public var ccomp :CharacterComponent;
+
+    public var frames :ActionFrames;
+
+    public function ComponentFrames (ccomp :CharacterComponent = null,
+        frames :ActionFrames = null) {
+        this.ccomp = ccomp;
+        this.frames = frames;
+    }
+
+    public function toString () :String {
+        return ccomp + ":" + frames;
+    }
+}
+}

aslib/src/main/as/com/threerings/cast/ComponentRepository.as

@@ -0,0 +1,69 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+/**
+ * Makes available a collection of character components and associated metadata. Character
+ * components are animated sequences that can be composited together to create a complete
+ * character visualization (imagine interchanging pairs of boots, torsos, hats, etc.).
+ */
+public interface ComponentRepository
+{
+    /**
+     * Returns the {@link CharacterComponent} object for the given component identifier.
+     */
+    function getComponent (componentId :int) :CharacterComponent;
+
+    /**
+     * Returns the {@link CharacterComponent} object with the given component class and name.
+     */
+    function getComponentByName (className :String, compName :String) :CharacterComponent;
+
+    /**
+     * Returns the {@link ComponentClass} with the specified name or null if none exists with that
+     * name.
+     */
+    function getComponentClass (className :String) :ComponentClass;
+
+    /**
+     * Iterates over the {@link ComponentClass} instances representing all available character
+     * component classes.
+     */
+    function getComponentClasses () :Array;
+
+    /**
+     * Iterates over the {@link ActionSequence} instances representing every available action
+     * sequence.
+     */
+    function getActionSequences () :Array;
+
+    /**
+     * Iterates over the component ids of all components in the specified class.
+     */
+    function getComponentIds (compClass :ComponentClass) :Array;
+
+    /**
+     * Loads up all the specified components and calls notify() when done.
+     */
+    function load (compIds :Array, notify :Function) :void;
+}
+}

aslib/src/main/as/com/threerings/cast/CompositedActionFrames.as

@@ -0,0 +1,199 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.display.Bitmap;
+import flash.display.BitmapData;
+import flash.display.DisplayObject;
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import com.threerings.util.Arrays;
+import com.threerings.util.Hashable;
+import com.threerings.util.Integer;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.util.RandomUtil;
+import com.threerings.util.StringUtil;
+
+/**
+ * An implementation of the {@link ActionFrames} interface that is used
+ * to lazily create composited character frames when they are requested.
+ */
+public class CompositedActionFrames
+    implements ActionFrames, Hashable
+{
+    /**
+     * Constructs a set of composited action frames with the supplied
+     * source frames and colorization configuration. The actual component
+     * frame images will not be composited until they are requested.
+     */
+    public function CompositedActionFrames (frameCache :Map, action :ActionSequence, sources :Array)
+    {
+        // sanity check
+        if (sources == null || sources.length == 0) {
+            var errmsg :String = "Requested to composite invalid set of source " +
+                "frames! [action=" + action +
+                ", sources=" + StringUtil.toString(sources) + "].";
+            throw new Error(errmsg);
+        }
+
+        _frameCache = frameCache;
+        _sources = sources;
+        _action = action;
+
+        // the sources must all have the same orientation count, so we
+        // just use the first
+
+        _orientCount = _sources[0].frames.getOrientationCount();
+    }
+
+    // documentation inherited from interface
+    public function getOrientationCount () :int
+    {
+        return _orientCount;
+    }
+
+    // documentation inherited from interface
+    public function getFrames (orient :int, callback :Function) :void
+    {
+        var key :CompositedFramesKey = new CompositedFramesKey(this, orient);
+        var disp :MultiFrameBitmap = _frameCache.get(key);
+        if (disp == null) {
+            var listeners :Array = _pending.get(key);
+            if (listeners != null) {
+                listeners.push(callback);
+            } else {
+                listeners = [callback];
+                _pending.put(key, listeners);
+
+                createFrames(orient, function(disp :MultiFrameBitmap) :void {
+                    _frameCache.put(key, disp);
+                    for each (var func :Function in listeners) {
+                        func(disp.clone());
+                    }
+                });
+            }
+        } else {
+            callback(disp.clone());
+        }
+    }
+
+    // documentation inherited from interface
+    public function getXOrigin (orient :int, frameIdx :int) :int
+    {
+        return 0;
+    }
+
+    // documentation inherited from interface
+    public function getYOrigin (orient :int, frameIdx :int) :int
+    {
+        return 0;
+    }
+
+    // documentation inherited from interface
+    public function cloneColorized (zations :Array) :ActionFrames
+    {
+        throw new Error("Unsupported: CompositedActionFrames.cloneColorized()");
+    }
+
+    // documentation inherited from interface
+    public function cloneTranslated (dx :int, dy :int) :ActionFrames
+    {
+        var tsources :Array = new Array(_sources.length);
+        for (var ii :int = 0; ii < _sources.length; ii++) {
+            tsources[ii] = new ComponentFrames(
+                _sources[ii].ccomp, _sources[ii].frames.cloneTranslated(dx, dy));
+        }
+        return new CompositedActionFrames(_frameCache, _action, tsources);
+    }
+
+    /**
+     * Creates our underlying multi-frame image for a particular orientation.
+     */
+    protected function createFrames (orient :int, callback :Function) :void
+    {
+        Arrays.stableSort(_sources, function(cf1 :ComponentFrames, cf2 :ComponentFrames) :int {
+            return (cf1.ccomp.getRenderPriority(_action.name, orient) -
+                cf2.ccomp.getRenderPriority(_action.name, orient));
+        });
+
+        var idx :int = Arrays.indexOf(_action.orients, orient);
+
+        var frameCt :int = _action.tileset.getTileCounts()[idx];
+        var width :int = _action.tileset.getWidths()[idx];
+        var height :int = _action.tileset.getHeights()[idx];
+        var frameBitmaps :Array = new Array(frameCt);
+        for (var ff :int = 0; ff < frameCt; ff++) {
+            frameBitmaps[ff] = new Bitmap(new BitmapData(width, height, true, 0x00000000));
+        }
+
+        var region :Rectangle = new Rectangle(0, 0, width, height);
+        var pt :Point = new Point(0, 0);
+        compositeFrames(frameBitmaps, _sources, 0, orient, region, pt, frameCt, callback);
+    }
+
+    protected function compositeFrames (frameBitmaps :Array, sources :Array, idx :int, orient :int,
+        region :Rectangle, pt :Point, frameCt :int, callback :Function) :void
+    {
+        if (idx >= sources.length) {
+            callback(new MultiFrameBitmap(frameBitmaps, _action.framesPerSecond));
+            return;
+        }
+
+        _sources[idx].frames.getFrames(orient, function (compBitmaps :MultiFrameBitmap) :void {
+            for (var ii :int = 0; ii < frameCt; ii++) {
+                frameBitmaps[ii].bitmapData.draw(compBitmaps.getFrame(ii).bitmapData);
+            }
+            compositeFrames(frameBitmaps, sources, idx+1, orient, region, pt, frameCt, callback);
+        });
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        return this === other;
+    }
+
+    public function hashCode () :int
+    {
+        return _randHashCode;
+    }
+
+    /** Used to cache our composited action frame images. */
+    protected var _frameCache :Map;
+
+    protected static var _pending :Map = Maps.newMapOf(CompositedFramesKey);
+
+    /** The action for which we're compositing frames. */
+    protected var _action :ActionSequence;
+
+    /** The number of orientations. */
+    protected var _orientCount :int;
+
+    /** Our source components and action frames. */
+    protected var _sources :Array;
+
+    /** We keep a hash code to use to identify us nearly-uniquely from the CompositedFramesKey. */
+    protected var _randHashCode :int = int(Math.random() * Integer.MAX_VALUE);
+}
+}

aslib/src/main/as/com/threerings/cast/CompositedFramesKey.as

@@ -0,0 +1,58 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import com.threerings.util.Hashable;
+
+/** Used to cache composited frames for a particular action and
+ * orientation. */
+public class CompositedFramesKey
+    implements Hashable
+{
+    public function CompositedFramesKey (owner :CompositedActionFrames, orient :int) {
+        _orient = orient;
+        _owner = owner;
+    }
+
+    public function setOrient (orient :int) :void {
+        _orient = orient;
+    }
+
+    public function getOwner () :CompositedActionFrames {
+        return _owner;
+    }
+
+    public function equals (other :Object) :Boolean  {
+        var okey :CompositedFramesKey = CompositedFramesKey(other);
+        return ((getOwner() == okey.getOwner()) &&
+                (_orient == okey._orient));
+    }
+
+    public function hashCode () :int {
+        return _owner.hashCode() ^ _orient;
+    }
+
+    protected var _orient :int;
+
+    protected var _owner :CompositedActionFrames;
+}
+}

aslib/src/main/as/com/threerings/cast/DataPackComponentRepository.as

@@ -0,0 +1,311 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.events.Event;
+
+import com.threerings.cast.ComponentDataPack;
+import com.threerings.media.tile.TileDataPack;
+import com.threerings.util.Arrays;
+import com.threerings.util.DataPack;
+import com.threerings.util.Log;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.util.StringUtil;
+
+public class DataPackComponentRepository
+    implements ComponentRepository
+{
+    private static var log :Log = Log.getLog(DataPackComponentRepository);
+
+    public function DataPackComponentRepository (compUrl :String)
+    {
+        _rootUrl = compUrl;
+        loadComponentMeta(compUrl + "metadata.jar");
+    }
+
+    protected function loadComponentMeta (compMetaUrl :String) :void
+    {
+        _metaPack = new TileDataPack(compMetaUrl, metaLoadingComplete);
+    }
+
+    /**
+     * Handle the successful completion of datapack loading.
+     *
+     * @private
+     */
+    protected function metaLoadingComplete (event :Event) :void
+    {
+        var actionXml :XML = _metaPack.getFileAsXML("actions.xml");
+        var classesXml :XML = _metaPack.getFileAsXML("classes.xml");
+
+        for each (var aXml :XML in actionXml.action) {
+            var action :ActionSequence = ActionSequence.fromXml(aXml);
+            _actions.put(action.name, action);
+        }
+
+        for each (var cXml :XML in classesXml.elements("class")) {
+            var compClass :ComponentClass = ComponentClass.fromXml(cXml);
+            _classes.put(compClass.name, compClass);
+        }
+
+        parseComponentMap(_metaPack.getFileAsString("compmap.txt"));
+
+        // Notify them all and clear our list.
+        for each (var func :Function in _notifyOnLoad) {
+            func();
+        }
+        _notifyOnLoad = [];
+    }
+
+    protected function parseComponentMap (map :String) :void
+    {
+        var lines :Array = map.split("\n");
+        var tileCount :int = int(lines[0]);
+        for (var ii :int = 1; ii < lines.length; ii++) {
+            var line :String = lines[ii];
+            var toks :Array = line.split(" := ");
+            if (toks.length >= 3) {
+                var id :int = int(toks[2]);
+                var cclass :String = String(toks[0]);
+                var cname :String = String(toks[1]);
+                createComponent(id, cclass, cname);
+            }
+        }
+    }
+
+    /**
+     * Creates a component and inserts it into the component table.
+     */
+    protected function createComponent (componentId :int, cclass :String, cname :String) :void
+    {
+        // look up the component class information
+        var clazz :ComponentClass = _classes.get(cclass);
+        if (clazz == null) {
+            log.warning("Non-existent component class",
+                "class", cclass, "name", cname, "id", componentId);
+            return;
+        }
+
+        // create the component - we'll set the frame provider as soon as we can.
+        var component :CharacterComponent = new CharacterComponent(componentId, cname, clazz, null);
+
+        // stick it into the appropriate tables
+        _components.put(componentId, component);
+
+        // we have a hash of lists for mapping components by class/name
+        var comps :Array = _classComps.get(cclass);
+        if (comps == null) {
+            comps = [];
+            _classComps.put(cclass, comps);
+        }
+        if (!Arrays.contains(comps, component)) {
+            comps.push(component);
+        } else {
+            log.info("Requested to register the same component twice?", "comp", component);
+        }
+    }
+
+    public function notifyOnLoad (func :Function) :void
+    {
+        _notifyOnLoad.push(func);
+    }
+
+    /**
+     * Returns the {@link CharacterComponent} object for the given component identifier.
+     */
+    public function getComponent (componentId :int) :CharacterComponent
+    {
+        var component :CharacterComponent = _components.get(componentId);
+        if (component == null) {
+            throw new NoSuchComponentError(componentId);
+        }
+        return component;
+    }
+
+    /**
+     * Returns the {@link CharacterComponent} object with the given component class and name.
+     */
+    public function getComponentByName (className :String, compName :String) :CharacterComponent
+    {
+        // look up the list for that class
+        var comps :Array = _classComps.get(className);
+        if (comps != null) {
+            for each (var comp :CharacterComponent in comps) {
+                if (comp.name == compName) {
+                    return comp;
+                }
+            }
+        }
+        throw new NoSuchComponentError(className + "/" + compName);
+    }
+
+    public function load (compIds :Array, notify :Function) :void
+    {
+        var complete :Boolean = true;
+
+        var toLoad :Array = [];
+
+        for each (var cid :int in compIds) {
+            var comp :CharacterComponent = getComponent(cid);
+            if (!comp.isLoaded()) {
+                toLoad.push(comp);
+            }
+        }
+
+        var waiting :int = toLoad.length;
+
+        if (waiting == 0) {
+            notify();
+        } else {
+            for each (var load :CharacterComponent in toLoad) {
+                load.notifyOnLoad(function() :void {
+                    waiting--;
+                    if (waiting == 0) {
+                        notify();
+                    }
+                });
+                loadComponent(load);
+            }
+        }
+    }
+
+    protected function loadComponent (comp :CharacterComponent) :void
+    {
+        var packName :String = comp.componentClass.name + "/" + comp.name;
+        var pack :ComponentDataPack = _packs.get(packName);
+        if (pack == null || !pack.isComplete()) {
+            loadPack(packName, comp);
+        } else {
+            comp.setFrameProvider(pack);
+        }
+    }
+
+    protected function loadPack (packName :String, comp :CharacterComponent) :void
+    {
+        var pack :ComponentDataPack = _packs.get(packName);
+
+        if (pack != null && pack.isComplete()) {
+            // Already loaded
+            return;
+        }
+
+        var completeListener :Function = function () :void {
+            comp.setFrameProvider(_packs.get(packName));
+        }
+
+        var listeners :Array = _packListeners.get(packName);
+        if (listeners == null) {
+            listeners = [];
+            _packListeners.put(packName, listeners);
+
+            var packCompleteListener :Function = function () :void {
+                for each (var listener :Function in listeners) {
+                    listener();
+                }
+                _packListeners.remove(packName);
+            }
+
+            pack = new ComponentDataPack(getPackUrl(packName), _actions, packCompleteListener);
+            _packs.put(packName, pack);
+        }
+
+        listeners.push(completeListener);
+    }
+
+    protected function getPackUrl (packName :String) :String
+    {
+        return _rootUrl + packName + "/components.jar";
+    }
+
+    /**
+     * Returns the {@link ComponentClass} with the specified name or null if none exists with that
+     * name.
+     */
+    public function getComponentClass (className :String) :ComponentClass
+    {
+        return _classes.get(className);
+    }
+
+    /**
+     * Iterates over the {@link ComponentClass} instances representing all available character
+     * component classes.
+     */
+    public function getComponentClasses () :Array
+    {
+        return _classes.values();
+    }
+
+    /**
+     * Iterates over the {@link ActionSequence} instances representing every available action
+     * sequence.
+     */
+    public function getActionSequences () :Array
+    {
+        return _actions.values();
+    }
+
+    /**
+     * Iterates over the component ids of all components in the specified class.
+     */
+    public function getComponentIds (compClass :ComponentClass) :Array
+    {
+        var result :Array = [];
+
+        _classes.forEach(function (key :int, value :CharacterComponent) :Boolean {
+            if (value.componentClass.equals(compClass)) {
+                result.push(key);
+            }
+            return false;
+        });
+
+        return result;
+    }
+
+    /** Everyone who cares when we're loaded. */
+    protected var _notifyOnLoad :Array = [];
+
+    /** Contains the component meta-data for all components. */
+    protected var _metaPack : DataPack;
+
+    /** The URL for our components. */
+    protected var _rootUrl :String;
+
+    /** Map of pack name to listeners waiting for that pack to resolve. */
+    protected var _packListeners :Map = Maps.newMapOf(String);
+
+    /** The map of packs we've already loaded up and resolved. */
+    protected var _packs :Map = Maps.newMapOf(String);
+
+    /** All our component classes by name. */
+    protected var _classes :Map = Maps.newMapOf(String);
+
+    /** All our action sequences by name. */
+    protected var _actions :Map = Maps.newMapOf(String);
+
+    /** The map of componentId to CharacterComponent */
+    protected var _components :Map = Maps.newMapOf(int);
+
+    /** A table of component lists indexed on classname. */
+    protected var _classComps :Map = Maps.newMapOf(String);
+}
+}

aslib/src/main/as/com/threerings/cast/FrameProvider.as

@@ -0,0 +1,50 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import com.threerings.util.Set;
+
+/**
+ * Provides a mechanism where by a character component can obtain access
+ * to its image frames for a particular action in an on demand manner.
+ */
+public interface FrameProvider
+{
+    /**
+     * Returns the animation frames (in the eight sprite directions) for
+     * the specified action of the specified component. May return null if
+     * the specified action does not exist for the specified component.
+     */
+    function getFrames (
+        component :CharacterComponent, action :String, type :String) :ActionFrames;
+
+    /**
+     * Returns the file path of the animation frames (in the eight sprite directions) for the
+     * specified action of the specified component. May return a path to the default action or
+     * null if the specified action does not exist for the specified component.
+     *
+     * @param existentPaths the set of all paths for which there are valid frames.
+     */
+    function getFramePath (
+        component :CharacterComponent, action :String, type :String, existentPaths :Set):String;
+}
+}

aslib/src/main/as/com/threerings/cast/MultiFrameBitmap.as

@@ -0,0 +1,108 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.display.Bitmap;
+import flash.display.Sprite;
+
+import flash.geom.Point;
+
+import flash.events.Event;
+
+import com.threerings.media.Tickable;
+import com.threerings.util.StringUtil;
+
+public class MultiFrameBitmap extends Sprite
+    implements Tickable
+{
+    public function MultiFrameBitmap (frames :Array, fps :Number)
+    {
+        _frames = frames;
+        _bitmap = new Bitmap();
+        _fps = fps;
+        _frameRate = fps / 1000.0;
+        addChild(_bitmap);
+        setFrame(0);
+    }
+
+    public function tick (tickStamp :int) :void
+    {
+        if (_start == 0) {
+            _start = tickStamp;
+        }
+
+        var elapsedTime :int = (tickStamp - _start);
+        var frameIndex :int = Math.floor(elapsedTime * _frameRate) % _frames.length;
+        setFrame(frameIndex);
+    }
+
+    protected function setFrame (index :int) :void
+    {
+        if (_curFrameIndex != index) {
+            _bitmap.bitmapData = Bitmap(_frames[index]).bitmapData;
+            _curFrameIndex = index;
+        }
+    }
+
+    public function getFrame (index :int) :Bitmap
+    {
+        return _frames[index];
+    }
+
+    public function getFrameCount () :int
+    {
+        return _frames.length;
+    }
+
+    public function hitTest (stageX :int, stageY :int) :Boolean
+    {
+        if (_curFrameIndex == -1) {
+            return false;
+        } else {
+            if (!_bitmap.hitTestPoint(stageX, stageY, true)) {
+                // Doesn't even hit the bounds...
+                return false;
+            }
+            // Check the actual pixels...
+            var pt :Point = _bitmap.globalToLocal(new Point(stageX, stageY));
+            return _bitmap.bitmapData.hitTest(new Point(0, 0), 0, pt);
+        }
+    }
+
+    public function clone () :MultiFrameBitmap
+    {
+        return new MultiFrameBitmap(_frames, _fps);
+    }
+
+    protected var _frames :Array;
+
+    protected var _bitmap :Bitmap;
+
+    protected var _start :int;
+
+    protected var _frameRate :Number;
+
+    protected var _fps :Number;
+
+    protected var _curFrameIndex :int = -1;
+}
+}

aslib/src/main/as/com/threerings/cast/NoSuchComponentError.as

@@ -0,0 +1,36 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+/**
+ * Thrown when an attempt is made to retrieve a non-existent character
+ * component from the component repository.
+ */
+public class NoSuchComponentError extends Error
+{
+    public function NoSuchComponentError (comp :*)
+    {
+        super((comp is int) ? ("No component with id '" + int(comp) + "'") :
+            ("No component named'" + String(comp) + "'"));
+    }
+}
+}

aslib/src/main/as/com/threerings/cast/PriorityOverride.as

@@ -0,0 +1,138 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import com.threerings.util.ClassUtil;
+import com.threerings.util.Comparable;
+import com.threerings.util.DirectionUtil;
+import com.threerings.util.Hashable;
+import com.threerings.util.Equalable;
+import com.threerings.util.Set;
+import com.threerings.util.Sets;
+import com.threerings.util.StringUtil;
+import com.threerings.util.XmlUtil;
+
+/** Used to effect custom render orders for particular actions, orientations, etc. */
+public class PriorityOverride
+    implements Comparable, Hashable, Equalable
+{
+    /** The overridden render priority value. */
+    public var renderPriority :int;
+
+    /** The action, if any, for which this override is appropriate. */
+    public var action :String = null;
+
+    /** The component, if any, for which this override is appropriate. */
+    public var component :String = null;
+
+    /** The orientations, if any, for which this override is appropriate. */
+    public var orients :Set;
+
+    public static function fromXml (xml :XML) :PriorityOverride
+    {
+        var override :PriorityOverride = new PriorityOverride;
+        override.renderPriority = XmlUtil.getIntAttr(xml, "renderPriority");
+        override.action = XmlUtil.getStringAttr(xml, "action", null);
+        override.component = XmlUtil.getStringAttr(xml, "component", null);
+        
+        override.orients = Sets.newSetOf(int);
+        for each (var orient :int in toOrientArray(
+            XmlUtil.getStringAttr(xml, "orients", null))) {
+            override.orients.add(orient);
+        }
+        return override;
+    }
+
+    protected static function toOrientArray (str :String) :Array
+    {
+        if (str == null || str.length == 0) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :String, index :int, arr :Array) :int {
+                return DirectionUtil.fromShortString(StringUtil.trim(element));
+            });
+    }
+
+    /**
+     * Determines whether this priority override matches the specified
+     * action, orientation ant component combination.
+     */
+    public function matches (action :String, component :String, orient :int) :Boolean
+    {
+        return (((this.orients == null) || orients.contains(orient)) &&
+                ((this.component == null) || this.component == component) &&
+                ((this.action == null) || this.action == action));
+    }
+
+    // documentation inherited from interface
+    public function compareTo (po :Object) :int
+    {
+        // overrides with both an action and an orientation should come first in the list
+        var pri :int = priority();
+        var opri :int = PriorityOverride(po).priority();
+        if (pri == opri) {
+            return hashCode() - PriorityOverride(po).hashCode();
+        } else {
+            return pri - opri;
+        }
+    }
+
+    public function hashCode () :int
+    {
+        return StringUtil.hashCode(action) ^ StringUtil.hashCode(component) ^ renderPriority;
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        if (!(other is PriorityOverride)) {
+            return false;
+        }
+        var otherOverride :PriorityOverride = PriorityOverride(other);
+
+        return otherOverride.renderPriority == renderPriority && otherOverride.action == action &&
+            otherOverride.component == component;
+    }
+
+    protected function priority () :int
+    {
+        var priority :int = 0;
+        if (component != null) {
+            priority += 3; // Extra priority to things that are for specific components
+        }
+        if (action != null) {
+            priority++;
+        }
+        if (orients != null) {
+            priority++;
+        }
+        return priority;
+    }
+
+    public function toString () :String
+    {
+        return "[pri=" + renderPriority + ", action=" + action + ", component=" + component +
+            ", orients=" + orients + "]";
+    }
+
+}
+}

aslib/src/main/as/com/threerings/cast/StandardActions.as

@@ -0,0 +1,43 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+/**
+ * Actions are referenced by name and this interface defines constants for
+ * standard actions and action suffixes used by the shadow and cropping
+ * support.
+ */
+public class StandardActions
+{
+    /** The name of the standard standing action. */
+    public static const STANDING :String = "standing";
+
+    /** The name of the standard walking action. */
+    public static const WALKING :String = "walking";
+
+    /** A special action sub-type for shadow imagery. */
+    public static const SHADOW_TYPE :String = "shadow";
+
+    /** A special action sub-type for crop imagery. */
+    public static const CROP_TYPE :String = "crop";
+}
+}

aslib/src/main/as/com/threerings/cast/TileSetFrameImage.as

@@ -0,0 +1,131 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.cast {
+
+import flash.display.Bitmap;
+
+import flash.geom.Rectangle;
+
+import com.threerings.media.tile.Tile;
+import com.threerings.media.tile.TileSet;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+
+public class TileSetFrameImage
+    implements ActionFrames
+{
+    public function TileSetFrameImage (set :TileSet, actseq :ActionSequence,
+         dx :int = 0, dy :int = 0)
+    {
+        _set = set;
+        _actseq = actseq;
+        _dx = dx;
+        _dy = dy;
+
+        // compute these now to avoid pointless recomputation later
+        _ocount = actseq.orients.length;
+        _fcount = set.getTileCount() / _ocount;
+
+        // create our mapping from orientation to animation sequence index
+        for (var ii :int = 0; ii < _ocount; ii++) {
+            _orients.put(actseq.orients[ii], ii);
+        }
+    }
+
+    public function getFrames (orient :int, callback :Function) :void
+    {
+        var frames :Array = new Array(_fcount);
+        getFramesFromTiles(frames, 0, orient, callback);
+    }
+
+    protected function getFramesFromTiles (frames :Array, idx :int, orient :int,
+        callback :Function) :void
+    {
+        if (idx >= frames.length) {
+            callback(new MultiFrameBitmap(frames, _actseq.framesPerSecond));
+        } else {
+            var tile :Tile = getTile(orient, idx);
+            tile.notifyOnLoad(function() :void {
+                frames[idx] = Bitmap(tile.getImage());
+                getFramesFromTiles(frames, idx + 1, orient, callback);
+            });
+        }
+    }
+
+    // documentation inherited from interface
+    public function getOrientationCount () :int
+    {
+        return _ocount;
+    }
+
+    protected function getTileIndex (orient :int, index :int) :int
+    {
+        return _orients.get(orient) * _fcount + index;
+    }
+
+    protected function getTile (orient :int, index :int) :Tile
+    {
+        return _set.getTile(getTileIndex(orient, index));
+    }
+
+    // documentation inherited from interface
+    public function getXOrigin (orient :int, index :int) :int
+    {
+        return _actseq.origin.x;
+    }
+
+    // documentation inherited from interface
+    public function getYOrigin (orient :int, index :int) :int
+    {
+        return _actseq.origin.y;
+    }
+
+    // documentation inherited from interface
+    public function cloneColorized (zations :Array) :ActionFrames
+    {
+        return new TileSetFrameImage(_set.cloneWithZations(zations), _actseq);
+    }
+
+    // documentation inherited from interface
+    public function cloneTranslated (dx :int, dy :int) :ActionFrames
+    {
+        return new TileSetFrameImage(_set, _actseq, dx, dy);
+    }
+
+    /** The tileset from which we obtain our frame images. */
+    protected var _set :TileSet;
+
+    /** The action sequence for which we're providing frame images. */
+    protected var _actseq :ActionSequence;
+
+    /** A translation to apply to the images. */
+    protected var _dx :int;
+    protected var _dy :int;
+
+    /** Frame and orientation counts. */
+    protected var _fcount :int;
+    protected var _ocount :int;
+
+    /** A mapping from orientation code to animation sequence index. */
+    protected var _orients :Map = Maps.newMapOf(int);
+}
+}

aslib/src/main/as/com/threerings/flex/AmbidextrousList.as

@@ -0,0 +1,79 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import mx.controls.List;
+
+import mx.core.EdgeMetrics;
+
+/**
+ * A list that can be configured with the vertical scrollbar on the left or right side.
+ */
+public class AmbidextrousList extends List
+{
+    /**
+     * Get whether the scrollbar is on the left side.
+     */
+    public function get scrollBarOnLeft () :Boolean
+    {
+        return _scrollLeft;
+    }
+
+    /**
+     * Sets whether to place the scrollbar on the left or right side.
+     */
+    public function set scrollBarOnLeft (scrollLeft :Boolean) :void
+    {
+        _scrollLeft = scrollLeft;
+
+        scrollAreaChanged = true;
+        invalidateDisplayList();
+    }
+
+    /** @inheritDoc */
+    override public function get viewMetrics () :EdgeMetrics
+    {
+        var em :EdgeMetrics = super.viewMetrics;
+
+        if (_scrollLeft && verticalScrollBar && verticalScrollBar.visible) {
+            em.right -= verticalScrollBar.minWidth;
+            em.left += verticalScrollBar.minWidth;
+        }
+
+        return em;
+    }
+
+    /** @inheritDoc */
+    override protected function updateDisplayList (uw :Number, uh :Number) :void
+    {
+        super.updateDisplayList(uw, uh);
+
+        if (_scrollLeft) {
+            var vm :EdgeMetrics = viewMetrics;
+            verticalScrollBar.move(vm.left - verticalScrollBar.minWidth, vm.top);
+        }
+    }
+
+    /** Do we want to have the scrollbar on the left? */
+    protected var _scrollLeft :Boolean;
+}
+}

aslib/src/main/as/com/threerings/flex/ChatControl.as

@@ -0,0 +1,237 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObjectContainer;
+
+import flash.events.Event;
+import flash.events.FocusEvent;
+import flash.events.KeyboardEvent;
+import flash.events.MouseEvent;
+
+import flash.ui.Keyboard;
+
+import mx.containers.HBox;
+
+import mx.core.Application;
+
+import mx.controls.TextInput;
+
+import mx.events.FlexEvent;
+
+import com.threerings.util.Arrays;
+import com.threerings.util.DelayUtil;
+import com.threerings.util.StringUtil;
+
+import com.threerings.flex.CommandButton;
+
+import com.threerings.crowd.chat.client.ChatDirector;
+import com.threerings.crowd.chat.data.ChatCodes;
+
+import com.threerings.crowd.util.CrowdContext;
+
+/**
+ * The chat control widget.
+ */
+public class ChatControl extends HBox
+{
+    /**
+     * Request focus for the oldest ChatControl.
+     */
+    public static function grabFocus () :void
+    {
+        if (_controls.length > 0) {
+            (_controls[0] as ChatControl).setFocus();
+        }
+    }
+
+    public function ChatControl (
+        ctx :CrowdContext, sendButtonLabel :String = "send",
+        height :Number = NaN, controlHeight :Number = NaN)
+    {
+        _ctx = ctx;
+        _chatDtr = _ctx.getChatDirector();
+
+        this.height = height;
+        styleName = "chatControl";
+
+        addChild(_txt = new ChatInput());
+        _txt.addEventListener(FlexEvent.ENTER, sendChat, false, 0, true);
+        _txt.addEventListener(KeyboardEvent.KEY_UP, handleKeyUp);
+
+        _but = new CommandButton(sendButtonLabel, sendChat);
+        addChild(_but);
+
+        if (!isNaN(controlHeight)) {
+            _txt.height = controlHeight;
+            _but.height = controlHeight;
+        }
+
+        addEventListener(Event.ADDED_TO_STAGE, handleAddRemove);
+        addEventListener(Event.REMOVED_FROM_STAGE, handleAddRemove);
+    }
+
+    /**
+     * Provides access to the text field we use to accept chat.
+     */
+    public function get chatInput () :ChatInput
+    {
+        return _txt;
+    }
+
+    /**
+     * Provides access to the send button.
+     */
+    public function get sendButton () :CommandButton
+    {
+        return _but;
+    }
+
+    override public function set enabled (en :Boolean) :void
+    {
+        super.enabled = en;
+        if (_txt != null) {
+            _txt.enabled = en;
+            _but.enabled = en;
+        }
+    }
+
+    /**
+     * Request focus to this chat control.
+     */
+    override public function setFocus () :void
+    {
+        _txt.setFocus();
+    }
+
+    /**
+     * Configures the chat director to which we should send our chat. Pass null to restore our
+     * default chat director.
+     */
+    public function setChatDirector (chatDtr :ChatDirector) :void
+    {
+        _chatDtr = (chatDtr == null) ? _ctx.getChatDirector() : chatDtr;
+    }
+
+    /**
+     * Configures the background color of the text entry area.
+     */
+    public function setChatColor (color :uint) :void
+    {
+        _txt.setStyle("backgroundColor", color);
+    }
+
+    /**
+     * Handles FlexEvent.ENTER and the action from the send button.
+     */
+    protected function sendChat (... ignored) :void
+    {
+        var message :String = StringUtil.trim(_txt.text);
+        if ("" == message) {
+            return;
+        }
+
+        var result :String = _chatDtr.requestChat(null, message, true);
+        if (result != ChatCodes.SUCCESS) {
+            _chatDtr.displayFeedback(null, result);
+            return;
+        }
+
+        // If there was no error, clear the entry area in prep for the next entry event
+        DelayUtil.delayFrame(function () : void {
+            // WORKAROUND
+            // Originally we cleared the text immediately, but with flex 3.2 this broke
+            // for *some* people. Weird! We're called from the event dispatcher for the
+            // enter key, so it's possible that the default action is booching it?
+            // In any case, this could possibly be removed in the future by the ambitious.
+            // Note also: Flex's built-in callLater() doesn't work, but DelayUtil does. WTF?!?
+            _txt.text = "";
+        });
+        _histidx = -1;
+    }
+
+    protected function scrollHistory (next :Boolean) :void
+    {
+        var size :int = _chatDtr.getCommandHistorySize();
+        if ((_histidx == -1) || (_histidx == size)) {
+            _curLine = _txt.text;
+            _histidx = size;
+        }
+
+        _histidx = (next) ? Math.min(_histidx + 1, size)
+                          : Math.max(_histidx - 1, 0);
+        var text :String = (_histidx == size) ? _curLine : _chatDtr.getCommandHistory(_histidx);
+        _txt.text = text;
+        _txt.setSelection(text.length, text.length);
+    }
+
+    /**
+     * Handles Event.ADDED_TO_STAGE and Event.REMOVED_FROM_STAGE.
+     */
+    protected function handleAddRemove (event :Event) :void
+    {
+        if (event.type == Event.ADDED_TO_STAGE) {
+            // set up any already-configured text
+            _txt.text = _curLine;
+            _histidx = -1;
+
+            // request focus
+            callLater(_txt.setFocus);
+            _controls.push(this);
+
+        } else {
+            _curLine = _txt.text;
+            Arrays.removeAll(_controls, this);
+        }
+    }
+
+    protected function handleKeyUp (event :KeyboardEvent) :void
+    {
+        switch (event.keyCode) {
+        case Keyboard.UP: scrollHistory(false); break;
+        case Keyboard.DOWN: scrollHistory(true); break;
+        }
+    }
+
+    /** Our client-side context. */
+    protected var _ctx :CrowdContext;
+
+    /** The director to which we are sending chat requests. */
+    protected var _chatDtr :ChatDirector;
+
+    /** The place where the user may enter chat. */
+    protected var _txt :ChatInput;
+
+    /** The current index in the chat command history. */
+    protected var _histidx :int = -1;
+
+    /** The button for sending chat. */
+    protected var _but :CommandButton;
+
+    /** An array of the currently shown-controls. */
+    protected static var _controls :Array = [];
+
+    /** The preserved current line of text when traversing history or carried between instances of
+     * ChatControl. */
+    protected static var _curLine :String;
+}
+}

aslib/src/main/as/com/threerings/flex/ChatDisplayBox.as

@@ -0,0 +1,103 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObjectContainer;
+
+import flash.events.Event;
+
+import mx.controls.TextArea;
+
+import com.threerings.crowd.chat.client.ChatDirector;
+import com.threerings.crowd.chat.client.ChatDisplay;
+import com.threerings.crowd.chat.data.ChatMessage;
+import com.threerings.crowd.chat.data.UserMessage;
+import com.threerings.crowd.util.CrowdContext;
+
+/**
+ * A very simple chat display.
+ */
+public class ChatDisplayBox extends TextArea
+    implements ChatDisplay
+{
+    public function ChatDisplayBox (ctx :CrowdContext)
+    {
+        _ctx = ctx;
+        this.editable = false;
+
+        // TODO
+        width = 400;
+        height = 150;
+
+        addEventListener(Event.ADDED_TO_STAGE, handleAddRemove);
+        addEventListener(Event.REMOVED_FROM_STAGE, handleAddRemove);
+    }
+
+    // documentation inherited from interface ChatDisplay
+    public function clear () :void
+    {
+        this.htmlText = "";
+    }
+
+    // documentation inherited from interface ChatDisplay
+    public function displayMessage (msg :ChatMessage) :void
+    {
+        if (!_scrollBot) {
+            _scrollBot = (verticalScrollPosition == maxVerticalScrollPosition);
+        }
+
+        // display the message
+        if (msg is UserMessage) {
+            this.htmlText += "<font color=\"red\">&lt;" +
+                (msg as UserMessage).speaker + "&gt;</font> ";
+        }
+        this.htmlText += msg.message;
+    }
+
+    // handle us being added or removed from the stage
+    protected function handleAddRemove (event :Event) :void
+    {
+        var chatdir :ChatDirector = _ctx.getChatDirector();
+        if (event.type == Event.ADDED_TO_STAGE) {
+            chatdir.addChatDisplay(this);
+        } else {
+            chatdir.removeChatDisplay(this);
+        }
+    }
+
+    // documentation inherited
+    override protected function updateDisplayList (uw :Number, uh :Number) :void
+    {
+        super.updateDisplayList(uw, uh);
+
+        if (_scrollBot) {
+            verticalScrollPosition = maxVerticalScrollPosition;
+            _scrollBot = false;
+        }
+    }
+
+    /** The giver of life. */
+    protected var _ctx :CrowdContext;
+
+    protected var _scrollBot :Boolean;
+}
+}

aslib/src/main/as/com/threerings/flex/ChatInput.as

@@ -0,0 +1,107 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.events.FocusEvent;
+
+import flash.text.TextField;
+
+import mx.controls.TextInput;
+
+import com.threerings.text.TextFieldUtil;
+
+/**
+ * The class name of an image to use as the input prompt.
+ */
+[Style(name="prompt", type="Class")]
+
+/**
+ * A special TextInput for entering Chat. One of these is used in ChatControl.
+ *
+ * A standard TextInput has the stupid behavior of selecting all the text when it receives
+ * focus. Disable that so that we can receive focus and people can type and we don't blow away
+ * whatever they had before.
+ */
+public class ChatInput extends TextInput
+{
+    public function ChatInput ()
+    {
+        width = 147;
+        showPrompt(true);
+    }
+
+    override public function stylesInitialized () :void
+    {
+        super.stylesInitialized();
+
+        checkShowPrompt();
+    }
+
+    override public function styleChanged (styleProp :String) :void
+    {
+        super.styleChanged(styleProp);
+
+        if (styleProp == "prompt") {
+            checkShowPrompt();
+        }
+    }
+
+    protected function checkShowPrompt () :void
+    {
+        showPrompt(focusManager == null || focusManager.getFocus() != this);
+    }
+
+    protected function showPrompt (show :Boolean) :void
+    {
+        setStyle("backgroundImage", (show && ("" == text)) ? getStyle("prompt") : undefined);
+    }
+
+    override protected function createChildren () :void
+    {
+        super.createChildren();
+
+        // For some reason, in embeds, during certain circumstances, it's really hard to focus
+        // chat. This makes that work better. The problem was *not* testable locally, only
+        // on embeds in production. (I don't know why.)
+        TextFieldUtil.setFocusable(TextField(textField));
+    }
+
+    override protected function focusInHandler (event :FocusEvent) :void
+    {
+        var oldValue :Boolean = textField.selectable;
+        textField.selectable = false;
+        try {
+            super.focusInHandler(event);
+
+        } finally {
+            textField.selectable = oldValue;
+        }
+        showPrompt(false);
+    }
+
+    override protected function focusOutHandler (event :FocusEvent) :void
+    {
+        super.focusOutHandler(event);
+        showPrompt(true);
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/CommandButton.as

@@ -0,0 +1,127 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.events.MouseEvent;
+
+import mx.controls.Button;
+
+import com.threerings.util.CommandEvent;
+
+/**
+ * A command button simply dispatches a Controller command (with an optional
+ * argument) when it is clicked.
+ */
+public class CommandButton extends Button
+{
+    /**
+     * Create a command button.
+     *
+     * @param label the label text for the button.
+     * @param cmdOrFn either a String, which will be the CommandEvent command to dispatch,
+     *        or a function, which will be called when clicked.
+     * @param arg the argument for the CommentEvent or the function. If the arg is an Array
+     *        then those parameters are used for calling the function.
+     */
+    public function CommandButton (label :String = null, cmdOrFn :* = null, arg :Object = null)
+    {
+        validateCmd(cmdOrFn);
+        this.label = label;
+        _cmdOrFn = cmdOrFn;
+        _arg = arg;
+        buttonMode = true;
+    }
+
+    /**
+     * Set the command and argument to be issued when this button is pressed.
+     */
+    public function setCommand (cmd :String, arg :Object = null) :void
+    {
+        _cmdOrFn = cmd;
+        _arg = arg;
+    }
+
+    /**
+     * Set a callback function to call when the button is pressed.
+     */
+    public function setCallback (fn :Function, arg :Object = null) :void
+    {
+        _cmdOrFn = fn;
+        _arg = arg;
+    }
+
+    /**
+     * Get the argument (or arguments, in an Array).
+     */
+    public function getArg () :Object
+    {
+        return _arg;
+    }
+
+    /**
+     * Emulate a user click, dispatching all relevant events.
+     */
+    public function activate () :void
+    {
+        dispatchEvent(new MouseEvent(MouseEvent.CLICK));
+    }
+
+    override public function set enabled (val :Boolean) :void
+    {
+        super.enabled = val;
+        buttonMode = val;
+    }
+
+    override protected function clickHandler (event :MouseEvent) :void
+    {
+        super.clickHandler(event);
+        processCommandClick(this, event, _cmdOrFn, getArg());
+    }
+
+    internal static function validateCmd (cmdOrFn :Object) :void
+    {
+        if (cmdOrFn != null && !(cmdOrFn is String) && !(cmdOrFn is Function)) {
+            // runtime errors suck, but this is actionscript
+            throw new Error("cmdOrFn must be a String or Function.");
+        }
+    }
+
+    internal static function processCommandClick (
+        button :Button, event :MouseEvent, cmdOrFn :Object, arg :Object) :void
+    {
+        if (button.enabled) {
+            event.stopImmediatePropagation();
+            if (arg == null && button.toggle) {
+                arg = button.selected;
+            }
+            CommandEvent.dispatch(button, cmdOrFn, arg);
+        }
+    }
+
+    /** The command (String) to submit, or the function (Function) to call
+     * when clicked,  */
+    protected var _cmdOrFn :Object;
+
+    /** The argument that accompanies our command. */
+    protected var _arg :Object;
+}
+}

aslib/src/main/as/com/threerings/flex/CommandCheckBox.as

@@ -0,0 +1,85 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.events.MouseEvent;
+
+import mx.controls.CheckBox;
+
+import com.threerings.util.CommandEvent;
+
+/**
+ * A checkbox that dispatches a command (or calls a function) when it is toggled.
+ */
+public class CommandCheckBox extends CheckBox
+{
+    /**
+     * Create a command checkbox.
+     *
+     * @param label the label text for the checkbox.
+     * @param cmdOrFn either a String, which will be the CommandEvent command to dispatch,
+     *        or a function, which will be called when clicked.
+     * @param arg the argument for the CommentEvent or the function. If the arg is an Array
+     *        then those parameters are used for calling the function.
+     * Note that if arg is null, the actual argument passed will be the 'selected' state of the
+     * checkbox. If you really want to call a method with no args, specify arg as an emtpy Array.
+     */
+    public function CommandCheckBox (label :String = null, cmdOrFn :* = null, arg :Object = null)
+    {
+        CommandButton.validateCmd(cmdOrFn);
+        this.label = label;
+        _cmdOrFn = cmdOrFn;
+        _arg = arg;
+    }
+
+    /**
+     * Set the command and argument to be issued when this button is pressed.
+     */
+    public function setCommand (cmd :String, arg :Object = null) :void
+    {
+        _cmdOrFn = cmd;
+        _arg = arg;
+    }
+
+    /**
+     * Set a callback function to call when the button is pressed.
+     */
+    public function setCallback (fn :Function, arg :Object = null) :void
+    {
+        _cmdOrFn = fn;
+        _arg = arg;
+    }
+
+    override protected function clickHandler (event :MouseEvent) :void
+    {
+        super.clickHandler(event);
+        CommandButton.processCommandClick(this, event, _cmdOrFn, _arg);
+    }
+
+    /** The command (String) to submit, or the function (Function) to call
+     * when clicked,  */
+    protected var _cmdOrFn :Object;
+
+    /** The argument that accompanies our command. */
+    protected var _arg :Object;
+}
+}

aslib/src/main/as/com/threerings/flex/CommandComboBox.as

@@ -0,0 +1,126 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.events.Event;
+
+import mx.controls.ComboBox;
+import mx.events.ListEvent;
+
+import com.threerings.util.CommandEvent;
+import com.threerings.util.Util;
+
+/**
+ * A combo box that dispatches a command (or calls a callback) when an item is selected.
+ * The argument will be the 'data' value of the selected item.
+ * NOTE: Unlike the other Command* controls, CommandComboBox allows a null cmd/callback
+ * to be specified.
+ */
+public class CommandComboBox extends ComboBox
+{
+    /** The field of the selectedItem object used as the 'data'. If this property is null,
+     * then the item is the data. */
+    public var dataField :String = "data";
+
+    /**
+     * Create a command combobox.
+     *
+     * @param cmdOrFn either a String, which will be the CommandEvent command to dispatch,
+     *        or a function, which will be called when changed.
+     */
+    public function CommandComboBox (cmdOrFn :* = null)
+    {
+        CommandButton.validateCmd(cmdOrFn);
+        _cmdOrFn = cmdOrFn;
+
+        addEventListener(ListEvent.CHANGE, handleChange, false, int.MIN_VALUE);
+    }
+
+    /**
+     * Set the command and argument to be issued when this button is pressed.
+     */
+    public function setCommand (cmd :String) :void
+    {
+        _cmdOrFn = cmd;
+    }
+
+    /**
+     * Set a callback function to call when the button is pressed.
+     */
+    public function setCallback (fn :Function) :void
+    {
+        _cmdOrFn = fn;
+    }
+
+    /**
+     * Set the selectedItem based on the data field.
+     */
+    public function set selectedData (data :Object) :void
+    {
+        for (var ii :int = 0; ii < dataProvider.length; ++ii) {
+            if (Util.equals(data, itemToData(dataProvider[ii]))) {
+                this.selectedIndex = ii;
+                return;
+            }
+        }
+
+        // not found, clear the selection
+        this.selectedIndex = -1;
+    }
+
+    /**
+     * The value that will be passed to the command or function based on dataField and the
+     * current selected item.
+     */
+    public function get selectedData () :Object
+    {
+        return itemToData(this.selectedItem);
+    }
+
+    /**
+     * Extract the data from the specified item. This can be expanded in the future
+     * if we provide a 'dataFunction'.
+     */
+    protected function itemToData (item :Object) :Object
+    {
+        if (item != null && dataField != null) {
+            try {
+                return item[dataField];
+            } catch (re :ReferenceError) {
+                // fallback to just returning the item
+            }
+        }
+        return item;
+    }
+
+    protected function handleChange (event :ListEvent) :void
+    {
+        if (_cmdOrFn != null && this.selectedIndex != -1) {
+            CommandEvent.dispatch(this, _cmdOrFn, selectedData);
+        }
+    }
+
+    /** The command (String) to submit, or the function (Function) to call
+     * when changed,  */
+    protected var _cmdOrFn :Object;
+}
+}

aslib/src/main/as/com/threerings/flex/CommandLinkButton.as

@@ -0,0 +1,90 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.events.MouseEvent;
+
+import mx.controls.LinkButton;
+
+import com.threerings.util.CommandEvent;
+
+/**
+ * A CommandLinkButton looks like a link but dispatches a Controller command
+ * when clicked.
+ */
+public class CommandLinkButton extends LinkButton
+{
+    /**
+     * Create a command link button.
+     *
+     * @param label the label text for the button.
+     * @param cmdOrFn either a String, which will be the CommandEvent command to dispatch,
+     *        or a function, which will be called when clicked.
+     * @param arg the argument for the CommentEvent or the function. If the arg is an Array
+     *        then those parameters are used for calling the function.
+     */
+    public function CommandLinkButton (label :String = null, cmdOrFn :* = null, arg :Object = null)
+    {
+        CommandButton.validateCmd(cmdOrFn);
+        this.label = label;
+        _cmdOrFn = cmdOrFn;
+        _arg = arg;
+    }
+
+    override public function set enabled (enable :Boolean) :void
+    {
+        super.enabled = enable;
+        buttonMode = enable;
+    }
+
+    /**
+     * Set the command and argument to be issued when this button is pressed.
+     */
+    public function setCommand (cmd :String, arg :Object = null) :void
+    {
+        _cmdOrFn = cmd;
+        _arg = arg;
+    }
+
+    /**
+     * Set a callback function to call when the button is pressed.
+     */
+    public function setCallback (fn :Function, arg :Object = null) :void
+    {
+        _cmdOrFn = fn;
+        _arg = arg;
+    }
+
+    override protected function clickHandler (event :MouseEvent) :void
+    {
+        super.clickHandler(event);
+        CommandButton.processCommandClick(this, event, _cmdOrFn, _arg);
+    }
+
+    /** The command (String) to submit, or the function (Function) to call
+     * when clicked,  */
+    protected var _cmdOrFn :Object;
+
+    /** Any argument that accompanies our command. */
+    protected var _arg :Object;
+}
+}

aslib/src/main/as/com/threerings/flex/CommandMenu.as

@@ -0,0 +1,537 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObject;
+import flash.display.DisplayObjectContainer;
+
+import flash.events.Event;
+import flash.events.IEventDispatcher;
+import flash.events.MouseEvent;
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import mx.controls.Button;
+import mx.controls.Menu;
+import mx.controls.listClasses.BaseListData;
+import mx.controls.listClasses.IListItemRenderer;
+import mx.controls.menuClasses.IMenuItemRenderer;
+import mx.controls.menuClasses.MenuListData;
+
+import mx.core.mx_internal;
+import mx.core.Application;
+import mx.core.ClassFactory;
+import mx.core.IFlexDisplayObject;
+import mx.core.ScrollPolicy;
+
+import mx.events.MenuEvent;
+
+import mx.managers.PopUpManager;
+
+import com.threerings.util.CommandEvent;
+
+import com.threerings.flex.PopUpUtil;
+
+import com.threerings.flex.menuClasses.CommandMenuItemRenderer;
+import com.threerings.flex.menuClasses.CommandListData;
+
+use namespace mx_internal;
+
+/**
+ * A pretty standard menu that can submit CommandEvents if menu items have "command" and possibly
+ * "arg" properties. Commands are submitted to controllers for processing. Alternatively, you may
+ * specify "callback" properties that specify a function closure to call, with the "arg" property
+ * containing either a single arg or an array of args.
+ *
+ * Another property now supported is "iconObject", which is an already-instantiated
+ * IFlexDisplayObject to use as the icon. This will only be applied if the "icon" property
+ * (which specifies a Class) is not used.
+ *
+ * Another 'type' now supported is "title", which gives the label for that item the style
+ * '.menuTitle' and disables it. Your ".menuTitle" style should use the disabledColor.
+ *
+ * Example dataProvider array:
+ * [ { label: "Go home", icon: homeIconClass,
+ *     command: Controller.GO_HOME, arg: homeId },
+ *   { type: "separator"},
+     { label: "Crazytown", callback: setCrazy, arg: [ true, false ] },
+ *   { label: "Other places", children: subMenuArray }
+ * ];
+ *
+ * See "Defining menu structure and data" in the Flex manual for the full list.
+ *
+ * CommandMenu is scrollable.  This can be forced by setting verticalScrollPolicy to 
+ * ScrollPolicy.AUTO or ScrollPolicy.ON and setting the maxHeight.  Also, if the scrolling isn't
+ * forced on, but the menu does not fit within the vertical bounds given (either the stage size by
+ * default, or the height of the rectangle given in setBounds()), scrolling will be turned on
+ * so that none of the content is lost.
+ *
+ * Note: we don't extend flexlib's ScrollableMenu (or its sub-class ScrollableArrowMenu) because it
+ * does some weird stuff in measure() that forces some of our menus down to a very small height...
+ */
+public class CommandMenu extends Menu
+{
+    /**
+     * Factory method to create a command menu.
+     *
+     * @param items an array of menu items.
+     * @param dispatcher an override event dispatcher to use for command events, rather than
+     * our parent.
+     */
+    public static function createMenu (
+        items :Array, dispatcher :IEventDispatcher = null) :CommandMenu
+    {
+        var menu :CommandMenu = new CommandMenu();
+        menu.owner = DisplayObjectContainer(Application.application);
+        menu.tabEnabled = false;
+        menu.showRoot = true;
+        menu.setDispatcher(dispatcher);
+        Menu.popUpMenu(menu, null, items); // does not actually pop up, but needed.
+        return menu;
+    }
+
+    /**
+     * Add a title to the TOP of the specified menu.
+     *
+     * @param icon may be a Class or IFlexDisplayObject.
+     */
+    public static function addTitle (
+        menuItems :Array, title :String, icon :* = null, separatorAfter :Boolean = true) :void
+    {
+        var o :Object = { label: title, type: "title" };
+        if (icon is Class) {
+            o["icon"] = icon;
+        } else if (icon is IFlexDisplayObject) {
+            o["iconObject"] = icon;
+        }
+        if (separatorAfter) {
+            menuItems.unshift({ type: "separator" });
+        }
+        menuItems.unshift(o);
+    }
+
+    /**
+     * Add a separator to the specified menu, unless it would not make sense to do so, because
+     * the menu is empty or already ends with a separator.
+     */
+    public static function addSeparator (menuItems :Array) :void
+    {
+        const len :int = menuItems.length;
+        if (len > 0 && menuItems[len - 1].type != "separator") {
+            menuItems.push({ type: "separator" });
+        }
+    }
+
+    /**
+     * The mx.controls.Menu class overrides setting and getting the verticalScrollPolicy
+     * basically setting the verticalScrollPolicy did nothing, and getting it always returned
+     * ScrollPolicy.OFF.  So that's not going to work if we want the menu to scroll. Here we 
+     * reinstate the verticalScrollPolicy setter, and keep a local copy of the value in a 
+     * protected variable _verticalScrollPolicy.
+     * 
+     * This setter is basically a copy of what ScrollControlBase and ListBase do.
+     */
+    override public function set verticalScrollPolicy (value :String) :void 
+    {
+        var newPolicy :String = value.toLowerCase();
+
+        itemsSizeChanged = true;
+
+        if (_verticalScrollPolicy != newPolicy) {
+            _verticalScrollPolicy = newPolicy;
+            dispatchEvent(new Event("verticalScrollPolicyChanged"));
+        }
+
+        invalidateDisplayList();
+    }
+
+    override public function get verticalScrollPolicy () :String
+    {
+        return _verticalScrollPolicy;
+    }
+
+    public function CommandMenu ()
+    {
+        super();
+
+        itemRenderer = new ClassFactory(getItemRenderer());
+
+        verticalScrollPolicy = ScrollPolicy.OFF;
+        variableRowHeight = true;
+        addEventListener(MenuEvent.ITEM_CLICK, itemClicked);
+        addEventListener(MenuEvent.MENU_HIDE, menuHidden);
+    }
+
+    /** 
+     * Called in the CommandMenu constructor, this should return the item rendering class for this
+     * CommandMenu.
+     */
+    protected function getItemRenderer () :Class
+    {
+        return CommandMenuItemRenderer;
+    }
+
+    /**
+     * Configure the button that popped-up this menu, which enables two features:
+     * 1) If the button is clicked again while the menu is up, it won't re-trigger, the menu will
+     *    just close.
+     * 2) However the menu closes, if the button is a toggle, it will be de-selected.
+     */
+    public function setTriggerButton (trigger :Button) :void
+    {
+        _trigger = trigger;
+    }
+
+    /**
+     * Configures the event dispatcher to be used when dispatching this menu's command events.
+     * Normally they will be dispatched on our parent (usually the SystemManager or something).
+     */
+    public function setDispatcher (dispatcher :IEventDispatcher) :void
+    {
+        _dispatcher = dispatcher;
+    }
+
+    /**
+     * Sets a Rectangle (in stage coords) that the menu will attempt to keep submenus positioned 
+     * within.  If a submenu is too large to fit, it will position it in the lower right corner
+     * of this Rectangle (or top if popping upwards, or left if popping leftwards).   This
+     * value defaults to the stage bounds.
+     */
+    public function setBounds (fitting :Rectangle) :void
+    {
+        _fitting = fitting;
+    }
+
+    /**
+     * Actually pop up the menu. This can be used instead of show().
+     */
+    public function popUp (
+        trigger :DisplayObject, popUpwards :Boolean = false, popLeftwards :Boolean = false) :void
+    {
+        _upping = popUpwards;
+        _lefting = popLeftwards;
+        var r :Rectangle = trigger.getBounds(trigger.stage);
+        show(_lefting ? r.left : r.right, _upping ? r.top : r.bottom);
+    }
+
+    /**
+     * Shows the menu at the specified mouse coordinates.
+     */
+    public function popUpAt (
+        mx :int, my :int, popUpwards :Boolean = false, popLeftwards :Boolean = false) :void
+    {
+        _upping = popUpwards;
+        _lefting = popLeftwards;
+        show(mx, my);
+    }
+
+    /**
+     * Shows the menu at the current mouse location.
+     */
+    public function popUpAtMouse (popUpwards :Boolean = false, popLeftwards :Boolean = false) :void
+    {
+        _upping = popUpwards;
+        _lefting = popLeftwards;
+        show(); // our show, with no args, pops at the mouse
+    }
+
+    /**
+     * Just like our superclass's show(), except that when invoked with no args, causes the menu to
+     * show at the current mouse location instead of the top-left corner of the application.
+     * Also, we ensure that the resulting menu is in-bounds.
+     */
+    override public function show (xShow :Object = null, yShow :Object = null) :void
+    {
+        if (xShow == null) {
+            xShow = DisplayObject(Application.application).mouseX;
+        }
+        if (yShow == null) {
+            yShow = DisplayObject(Application.application).mouseY;
+        }
+
+        super.show(xShow, yShow);
+
+        // reposition now that we know our size
+        if (_lefting) {
+            y = x - getExplicitOrMeasuredWidth();
+        }
+        if (_upping) {
+            y = y - getExplicitOrMeasuredHeight();
+        }
+
+        var fitting :Rectangle = _fitting || screen;
+        PopUpUtil.fitInRect(this, fitting);
+
+        // if after fitting as best we can, the menu is outside of the declared bounds, we force
+        // scrolling and set the max height
+        if (y < fitting.y) {
+            verticalScrollPolicy = ScrollPolicy.AUTO;
+            maxHeight = fitting.height;
+            y = fitting.y;
+        }
+
+        // set up some stuff to clean up and behave
+        systemManager.topLevelSystemManager.getSandboxRoot().addEventListener(
+            MouseEvent.MOUSE_DOWN, handleMouseDownOutside, false, 1, true);
+    }
+
+    override public function hide () :void
+    {
+        super.hide();
+        systemManager.topLevelSystemManager.getSandboxRoot().removeEventListener(
+            MouseEvent.MOUSE_DOWN, handleMouseDownOutside);
+    }
+
+    /** 
+     * The Menu class overrode configureScrollBars() and made the function do nothing.  That means
+     * the scrollbars don't know how to draw themselves, so here we reinstate configureScrollBars.
+     * This is basically a copy of the same method from the mx.controls.List class.
+     */
+    override protected function configureScrollBars () :void
+    {
+        var rowCount :int = listItems.length;
+        if (rowCount == 0) {
+            return;
+        }
+
+        // if there is more than one row and it is a partial row we don't count it
+        if (rowCount > 1 && 
+            rowInfo[rowCount - 1].y + rowInfo[rowCount - 1].height > listContent.height) {
+            rowCount--;
+        }
+
+        // offset, when added to rowCount, is hte index of the dataProvider item for that row.  
+        // IOW, row 10 in listItems is showing dataProvider item 10 + verticalScrollPosition - 
+        // lockedRowCount - 1
+        var offset :int = verticalScrollPosition - lockedRowCount - 1;
+
+        // don't count filler rows at the bottom either.
+        var fillerRows :int = 0;
+        while (rowCount > 0 && listItems[rowCount - 1].length == 0)
+        {
+            if (collection && rowCount + offset >= collection.length) {
+                rowCount--;
+                fillerRows++;
+            } else {
+                break;
+            }
+        }
+
+        var colCount :int = listItems[0].length;
+        var oldHorizontalScrollBar :Object = horizontalScrollBar;
+        var oldVerticalScrollBar :Object = verticalScrollBar;
+        var roundedWidth :int = Math.round(unscaledWidth);
+        var length :int = collection ? collection.length - lockedRowCount : 0;
+        var numRows :int = rowCount - lockedRowCount;
+
+        setScrollBarProperties(Math.round(listContent.width), roundedWidth, length, numRows);
+        maxVerticalScrollPosition = Math.max(length - numRows, 0);
+    }
+
+    /**
+     * Callback for MenuEvent.ITEM_CLICK.
+     */
+    protected function itemClicked (event :MenuEvent) :void
+    {
+        var arg :Object = getItemProp(event.item, "arg");
+        var cmdOrFn :Object = getItemProp(event.item, "command");
+        if (cmdOrFn == null) {
+            cmdOrFn = getItemProp(event.item, "callback");
+        }
+        if (cmdOrFn != null) {
+            event.stopImmediatePropagation();
+            CommandEvent.dispatch(_dispatcher == null ? mx_internal::parentDisplayObject :
+                                  _dispatcher, cmdOrFn, arg);
+        }
+        // else: no warning. There may be non-command menu items mixed in.
+    }
+
+    /**
+     * Handles MenuEvent.MENU_HIDE.
+     */
+    protected function menuHidden (event :MenuEvent) :void 
+    {
+        // don't react to submenu hides
+        if ((event.menu == this) && (_trigger != null) && _trigger.toggle) {
+            _trigger.selected = false;
+        }
+    }
+
+    /**
+     * Handle a down-popping click outside the menu.
+     */
+    protected function handleMouseDownOutside (event :MouseEvent) :void
+    {
+        if (event.target == _trigger) {
+            _trigger.addEventListener(
+                MouseEvent.CLICK, handleTriggerClick, false, int.MAX_VALUE, true);
+        }
+    }
+
+    /**
+     * Suppress the click that wants to land on the trigger button.
+     */
+    protected function handleTriggerClick (event :MouseEvent) :void
+    {
+        event.stopImmediatePropagation();
+        _trigger.removeEventListener(MouseEvent.CLICK, handleTriggerClick);
+    }
+
+    // from ScrollableArrowMenu..
+    override mx_internal function openSubMenu (row :IListItemRenderer) :void
+    {
+        supposedToLoseFocus = true;
+
+        var r :Menu = getRootMenu();
+        var menu :CommandMenu;
+
+        // check to see if the menu exists, if not create it
+        if (!IMenuItemRenderer(row).menu) {
+            // the only differences between this method and the original method in mx.controls.Menu
+            // are these few lines.
+            menu = new CommandMenu();
+            menu.maxHeight = this.maxHeight;
+            menu.verticalScrollPolicy = this.verticalScrollPolicy;
+            menu.variableRowHeight = this.variableRowHeight;
+
+            menu.parentMenu = this;
+            menu.owner = this;
+            menu.showRoot = showRoot;
+            menu.dataDescriptor = r.dataDescriptor;
+            menu.styleName = r;
+            menu.labelField = r.labelField;
+            menu.labelFunction = r.labelFunction;
+            menu.iconField = r.iconField;
+            menu.iconFunction = r.iconFunction;
+            menu.itemRenderer = r.itemRenderer;
+            menu.rowHeight = r.rowHeight;
+            menu.scaleY = r.scaleY;
+            menu.scaleX = r.scaleX;
+
+            // if there's data and it has children then add the items
+            if (row.data && _dataDescriptor.isBranch(row.data) &&
+                    _dataDescriptor.hasChildren(row.data)) {
+                menu.dataProvider = _dataDescriptor.getChildren(row.data);
+            }
+            menu.sourceMenuBar = sourceMenuBar;
+            menu.sourceMenuBarItem = sourceMenuBarItem;
+
+            IMenuItemRenderer(row).menu = menu;
+            PopUpManager.addPopUp(menu, r, false);
+        }
+
+        super.openSubMenu(row);
+
+        // if we're lefting, upping or fitting make sure our submenu does so as well
+        var submenu :Menu = IMenuItemRenderer(row).menu;
+        if (_lefting) {
+            submenu.x -= submenu.getExplicitOrMeasuredWidth();
+        }
+        if (_upping) {
+            var rowLoc :Point = row.localToGlobal(new Point());
+            submenu.y = rowLoc.y - submenu.getExplicitOrMeasuredHeight() + row.height;
+        }
+
+        var fitting :Rectangle = _fitting || screen;
+        PopUpUtil.fitInRect(submenu, fitting);
+        // if after fitting as best we can, the menu is outside of the declared bounds, we force
+        // scrolling and set the max height
+        if (submenu.y < fitting.y) {
+            submenu.verticalScrollPolicy = ScrollPolicy.AUTO;
+            submenu.maxHeight = fitting.height;
+            submenu.y = fitting.y;
+        }
+    }
+
+    override protected function measure () :void
+    {
+        super.measure();
+
+        if (measuredHeight > this.maxHeight) {
+            measuredHeight = this.maxHeight;
+        }
+
+        if (verticalScrollPolicy == ScrollPolicy.ON || verticalScrollPolicy == ScrollPolicy.AUTO) {
+            if (verticalScrollBar) {
+                measuredMinWidth = measuredWidth = measuredWidth + verticalScrollBar.minWidth;
+            }
+        }
+
+        commitProperties();
+    }
+
+    // from List
+    override protected function makeListData (data :Object, uid :String, rowNum :int) :BaseListData
+    {
+        // Oh, FFS.
+        // We need to set up these "maxMeasuredIconWidth" fields on the MenuListData, but our
+        // superclass has made those variables private.
+        // We can get the values out of another MenuListData, so we just always call super()
+        // to create one of those, and if we need to make a CommandListData, we construct one
+        // from the fields in the MenuListData.
+
+        var menuListData :MenuListData = super.makeListData(data, uid, rowNum) as MenuListData;
+
+        var iconObject :IFlexDisplayObject = getItemProp(data, "iconObject") as IFlexDisplayObject;
+        if (iconObject != null) {
+            var cmdListData :CommandListData = new CommandListData(menuListData.label,
+                menuListData.icon, iconObject, labelField, uid, this, rowNum);
+
+            cmdListData.maxMeasuredIconWidth = menuListData.maxMeasuredIconWidth;
+            cmdListData.maxMeasuredTypeIconWidth = menuListData.maxMeasuredTypeIconWidth;
+            cmdListData.maxMeasuredBranchIconWidth = menuListData.maxMeasuredBranchIconWidth;
+            cmdListData.useTwoColumns = menuListData.useTwoColumns;
+            return cmdListData;
+        }
+
+        return menuListData;
+    }
+
+    /**
+     * Get the specified property for the specified item, if any.  Somewhat similar to bits in the
+     * DefaultDataDescriptor.
+     */
+    protected function getItemProp (item :Object, prop :String) :Object
+    {
+        try {
+            if (item is XML) {
+                return String((item as XML).attribute(prop));
+
+            } else if (prop in item) {
+                return item[prop];
+            }
+
+        } catch (e :Error) {
+            // alas; fall through
+        }
+        return null;
+    }
+
+    protected var _dispatcher :IEventDispatcher;
+    protected var _trigger :Button;
+    protected var _lefting :Boolean = false;
+    protected var _upping :Boolean = false;
+    protected var _fitting :Rectangle = null;
+    protected var _verticalScrollPolicy :String;
+}
+}

aslib/src/main/as/com/threerings/flex/CursorManager.as

@@ -0,0 +1,323 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObject;
+import flash.display.InteractiveObject;
+import flash.display.Sprite;
+import flash.events.MouseEvent;
+import flash.text.TextField;
+import flash.text.TextFieldType;
+import flash.ui.Mouse;
+
+import mx.core.Application;
+import mx.managers.SystemManager;
+import mx.styles.CSSStyleDeclaration;
+import mx.styles.StyleManager;
+
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+
+/**
+ * A better CursorManager.
+ */
+public class CursorManager
+{
+    public static const SYSTEM_CURSOR :int = 0;
+
+    public static const BUSY_CURSOR :int = 1;
+
+    //--------------------------------------------------------------------------
+    //
+    //  Class methods
+    //
+    //--------------------------------------------------------------------------
+
+    /**
+     *  Makes the cursor visible.
+     *  Cursor visibility is not reference-counted.
+     *  A single call to the <code>showCursor()</code> method
+     *  always shows the cursor regardless of how many calls
+     *  to the <code>hideCursor()</code> method were made.
+     */
+    public static function showCursor () :void
+    {
+        if (_currentCursorId == SYSTEM_CURSOR) {
+            Mouse.show();
+        } else {
+            _cursorHolder.visible = true;
+        }
+    }
+    
+    /**
+     *  Makes the cursor invisible.
+     *  Cursor visibility is not reference-counted.
+     *  A single call to the <code>hideCursor()</code> method
+     *  always hides the cursor regardless of how many calls
+     *  to the <code>showCursor()</code> method were made.
+     */
+    public static function hideCursor () :void
+    {
+        _cursorHolder.visible = false;
+        Mouse.hide();
+    }
+
+    public static function getCurrentCursorId () :int
+    {
+        return _currentCursorId;
+    }
+
+    /**
+     *  Creates a new cursor.
+     *
+     *  @param cursorClass Class of the cursor to display.
+     *
+     *  @param xOffset Number that specifies the x offset
+     *  of the cursor, in pixels, relative to the mouse pointer.
+     *  The default value is 0.
+     *
+     *  @param yOffset Number that specifies the y offset
+     *  of the cursor, in pixels, relative to the mouse pointer.
+     *  The default value is 0.
+     *
+     *  @return The ID of the cursor.
+     */
+    public static function addCursor (
+            cursorClass :Class, xOffset :int = 0, yOffset :int = 0) :int 
+    {
+        var cursorId :int = _nextCursorId++;
+        
+        var rec :CursorRecord = new CursorRecord(cursorClass);
+        rec.x = xOffset;
+        rec.y = yOffset;
+
+        _cursors.put(cursorId, rec);
+        
+        return cursorId;
+    }
+
+    /**
+     * Set the current cursor.
+     */
+    public static function setCursor (id :int) :void
+    {
+        if (id == _currentCursorId) {
+            return;
+        }
+
+        if (!_initialized) {
+            // oh, let's set it up
+            _systemManager = Application.application.systemManager;
+
+            // set up the busy cursor
+            var cursorManagerStyleDeclaration :CSSStyleDeclaration =
+                StyleManager.getStyleDeclaration("CursorManager");
+            var busyCursorClass :Class =
+                cursorManagerStyleDeclaration.getStyle("busyCursor");
+            _busyCursor = new CursorRecord(busyCursorClass);
+
+            // The first time a cursor is requested of the CursorManager,
+            // create a Sprite to hold the cursor symbol
+            _cursorHolder = new Sprite();
+            _cursorHolder.mouseEnabled = false;
+            _systemManager.cursorChildren.addChild(_cursorHolder);
+
+            _initialized = true;
+        }
+
+        // figure out what the new cursor will be like
+        var rec :CursorRecord;
+        if (id == BUSY_CURSOR) {
+            rec = _busyCursor;
+
+        } else if (id != SYSTEM_CURSOR) {
+            rec = (_cursors.get(id) as CursorRecord);
+            if (rec == null) {
+                // a bogus id was specified
+                // TODO: throw an error?
+                return;
+            }
+        }
+
+        if (rec != null && (rec.cursor is Class)) {
+            // go ahead and instantiate the class
+            try {
+                var disp :DisplayObject = new (rec.cursor as Class);
+                rec.cursor = disp;
+                if (disp is InteractiveObject) {
+                    (disp as InteractiveObject).mouseEnabled = false;
+                }
+
+            } catch (err :Error) {
+                // this cursor is not usable, bail
+                return;
+            }
+        }
+
+        // always remove any custom cursors from the hierarchy
+        if (_cursorHolder.numChildren > 0) {
+            _cursorHolder.removeChildAt(0);
+        }
+
+        if (id != SYSTEM_CURSOR) {
+            Mouse.hide();
+            var currentCursor :DisplayObject = (rec.cursor as DisplayObject);
+            _cursorHolder.addChild(currentCursor);
+            _cursorHolder.x = _systemManager.mouseX + rec.x;
+            _cursorHolder.y = _systemManager.mouseY + rec.y;
+
+            _currentXOffset = rec.x;
+            _currentYOffset = rec.y;
+            _systemManager.stage.addEventListener(
+                MouseEvent.MOUSE_MOVE, mouseMoveHandler);
+        
+
+        } else {
+            _currentXOffset = 0;
+            _currentYOffset = 0;
+            _systemManager.stage.removeEventListener(
+                MouseEvent.MOUSE_MOVE, mouseMoveHandler);
+
+            Mouse.show();
+        }
+
+        _currentCursorId = id;
+    }
+
+    /**
+     *  Removes a cursor from the cursor list.
+     *  If the cursor being removed is the currently displayed cursor,
+     *  the CursorManager displays the next cursor in the list, if one exists.
+     *  If the list becomes empty, the CursorManager displays
+     *  the default system cursor.
+     *
+     *  @param cursorID ID of cursor to remove.
+     */
+    public static function removeCursor (id :int) :void 
+    {
+        var rec :CursorRecord = (_cursors.remove(id) as CursorRecord);
+
+        if (rec != null && id == _currentCursorId) {
+            setCursor(SYSTEM_CURSOR);
+        }
+    }
+    
+    /**
+     *  Removes all of the cursors from the cursor list
+     *  and restores the system cursor.
+     */
+    public static function removeAllCursors () :void
+    {
+        _cursors.clear();
+        
+        if (_currentCursorId != BUSY_CURSOR) {
+            setCursor(SYSTEM_CURSOR);
+        }
+    }
+    
+    //--------------------------------------------------------------------------
+    //
+    //  Class event handlers
+    //
+    //--------------------------------------------------------------------------
+
+    /**
+     *  @private
+     */
+    private static function mouseMoveHandler (event :MouseEvent) :void
+    {
+        _cursorHolder.x = _systemManager.mouseX + _currentXOffset;
+        _cursorHolder.y = _systemManager.mouseY + _currentYOffset;
+        
+        var target :Object = event.target;
+        
+        // Do target test.
+        if (!_overTextField &&
+                target is TextField && target.type == TextFieldType.INPUT) {	
+            _overTextField = true;
+            _showSystemCursor = true;
+
+        } else if (_overTextField &&
+                !(target is TextField && target.type == TextFieldType.INPUT)) {
+            _overTextField = false;
+            _showCustomCursor = true;
+        }
+        
+        // Handle switching between system and custom cursor.
+        if (_showSystemCursor) {
+            _showSystemCursor = false;
+            _cursorHolder.visible = false;
+            Mouse.show();
+        }
+        if (_showCustomCursor) {
+            _showCustomCursor = false;
+            _cursorHolder.visible = true;
+            Mouse.hide();
+        }
+    }
+
+    /** A mapping of all assigned cursor ids. */
+    private static const _cursors :Map = Maps.newMapOf(int);
+
+    private static var _currentCursorId :int = 0; // SYSTEM_CURSOR
+
+    private static var _nextCursorId :int = 2; // skip BUSY
+    
+    private static var _initialized :Boolean = false;
+
+    private static var _cursorHolder :Sprite;
+    
+    private static var _currentXOffset :int = 0;
+    private static var _currentYOffset :int = 0;
+
+    /** A record for the busy cursor (where it can't be removed). */
+    private static var _busyCursor :CursorRecord;
+
+    private static var _overTextField :Boolean = false;
+    
+    private static var _overLink :Boolean = false;
+    
+    private static var _showSystemCursor :Boolean = false;
+    
+    private static var _showCustomCursor :Boolean = false;
+    
+    private static var _systemManager :SystemManager = null;
+}
+}
+
+
+/**
+ */
+class CursorRecord extends Object
+{
+    public function CursorRecord (clazz :Class)
+    {
+        cursor = clazz;
+    }
+
+    /** The class, or instantiated cursor. */
+    public var cursor :Object
+
+    /** The x/y offset for the hotspot. */
+    public var x :Number;
+    public var y :Number;
+}

aslib/src/main/as/com/threerings/flex/DSetList.as

@@ -0,0 +1,205 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import mx.core.IFactory;
+import mx.core.ScrollPolicy;
+
+import mx.collections.ArrayCollection;
+import mx.collections.IList;
+import mx.collections.Sort;
+
+import mx.controls.List;
+
+import com.threerings.util.Util;
+
+import com.threerings.presents.dobj.AttributeChangedEvent;
+import com.threerings.presents.dobj.DEvent;
+import com.threerings.presents.dobj.DObject;
+import com.threerings.presents.dobj.DSet;
+import com.threerings.presents.dobj.DSet_Entry;
+import com.threerings.presents.dobj.EntryAddedEvent;
+import com.threerings.presents.dobj.EntryUpdatedEvent;
+import com.threerings.presents.dobj.EntryRemovedEvent;
+import com.threerings.presents.dobj.EventListener;
+import com.threerings.presents.dobj.NamedEvent;
+
+/**
+ * A list that renders the contents of a DSet.
+ */
+public class DSetList extends List
+    implements EventListener
+{
+    public function DSetList (
+        renderer :IFactory, sortFn :Function = null, filterFn :Function = null)
+    {
+        horizontalScrollPolicy = ScrollPolicy.OFF;
+        verticalScrollPolicy = ScrollPolicy.ON;
+        selectable = false;
+
+        itemRenderer = renderer;
+
+        _data = new ArrayCollection();
+        var sort :Sort = new Sort();
+        sort.compareFunction = sortFn;
+        _data.sort = sort;
+        _data.filterFunction = filterFn;
+        _data.refresh();
+        dataProvider = _data;
+    }
+
+    /**
+     * Set the data to be displayed by this List, if not being attached to a DObject.
+     */
+    public function setData (array :Array /* of DSet_Entry */) :void
+    {
+        _data.source = (array == null) ? [] : array;
+        refresh();
+    }
+
+    /**
+     * Refresh the data, which can be called if something external has changed
+     * the sort order or the rendering.
+     */
+    public function refresh () :void
+    {
+        _data.refresh();
+    }
+
+    /**
+     * Scroll so that the entry with the specified key is visible.
+     */
+    public function scrollToKey (key :Object) :Boolean
+    {
+        var scrollIdx :int = findKeyIndex(key, false);
+        return (scrollIdx == -1) ? false : scrollToIndex(scrollIdx);
+    }
+
+    /**
+     * Initialize listening on the specified object.
+     *
+     * @param object the DObject on which to listen.
+     * @param field the name of the DSet field that we're displaying.
+     * @param refreshFields additional fields that cause refresh() to be called should
+     *        AttributeChangedEvents arrive on them.
+     */
+    public function init (object :DObject, field :String, ... refreshFields) :void
+    {
+        shutdown();
+
+        _object = object;
+        _field = field;
+        _refreshFields = refreshFields;
+        _object.addListener(this);
+
+        setEntries(_object[_field] as DSet);
+    }
+
+    /**
+     * Shut down listening.
+     */
+    public function shutdown () :void
+    {
+        if (_object != null) {
+            _object.removeListener(this);
+            _object = null;
+            _field = null;
+            _refreshFields = null;
+            setData(null);
+        }
+    }
+
+    /**
+     * Safely set the entries, even if null.
+     */
+    protected function setEntries (entries :DSet) :void
+    {
+        setData((entries == null) ? null : entries.toArray());
+    }
+
+    /**
+     * From com.threerings.presents.dobj.EventListener. Not actually part of the public API.
+     */
+    public function eventReceived (event :DEvent) :void
+    {
+        if (!(event is NamedEvent)) {
+            return;
+        }
+        var name :String = NamedEvent(event).getName();
+        if (name == _field) {
+            if (event is EntryAddedEvent) {
+                _data.list.addItem(EntryAddedEvent(event).getEntry());
+
+            } else if (event is EntryUpdatedEvent) {
+                var entry :DSet_Entry = EntryUpdatedEvent(event).getEntry();
+                var upIdx :int = findKeyIndex(entry.getKey());
+                if (upIdx != -1) {
+                    _data.list.setItemAt(entry, upIdx);
+                }
+
+            } else if (event is EntryRemovedEvent) {
+                var remIdx :int = findKeyIndex(EntryRemovedEvent(event).getKey());
+                if (remIdx != -1) {
+                    _data.list.removeItemAt(remIdx);
+                }
+
+            } else if (event is AttributeChangedEvent) {
+                setEntries(AttributeChangedEvent(event).getValue() as DSet);
+                return; // skip the full refresh
+            }
+
+        } else if (-1 == _refreshFields.indexOf(name)) {
+            return; // this name is not our concern: do nothing
+        }
+
+        // we reach this line if the event was for a _refreshField, or a Set event on _field
+        refresh();
+    }
+
+    /**
+     * Find the index of the specified entry key from the raw or filtered list.
+     */
+    protected function findKeyIndex (key :Object, raw :Boolean = true) :int
+    {
+        var list :IList = raw ? _data.list : _data;
+        for (var ii :int = 0; ii < list.length; ii++) {
+            if (Util.equals(key, DSet_Entry(list.getItemAt(ii)).getKey())) {
+                return ii;
+            }
+        }
+        return -1;
+    }
+
+    /** The collection for the List, This is the filtered/sorted view. For the
+     * the raw list, we access _data.list. */
+    protected var _data :ArrayCollection;
+
+    /** The object on which we're listening. */
+    protected var _object :DObject;
+
+    /** The fieldname of the DSet in the _object. */
+    protected var _field :String;
+
+    /** Fields on which to watch for updates and call refresh(). */
+    protected var _refreshFields :Array;
+}
+}

aslib/src/main/as/com/threerings/flex/FlexUtil.as

@@ -0,0 +1,166 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObject;
+
+import mx.controls.Label;
+import mx.controls.Spacer;
+import mx.controls.Text;
+
+import mx.core.Container;
+import mx.core.UIComponent;
+
+import mx.containers.HBox;
+import mx.containers.VBox;
+
+/**
+ * Flex-related utility methods.
+ */
+public class FlexUtil
+{
+    /**
+     * Creates a label with the supplied text, and optionally applies a style class and tooltip
+     * to it.
+     */
+    public static function createLabel (
+        text :String, style :String = null, toolTip :String = null) :Label
+    {
+        var label :Label = new Label();
+        label.text = text;
+        label.styleName = style;
+        label.toolTip = toolTip;
+        return label;
+    }
+
+    /**
+     * Create an uneditable/unselectable multiline Text widget with the specified text and width.
+     */
+    public static function createText (text :String, width :int, style :String = null) :Text
+    {
+        var t :Text = new Text();
+        t.styleName = style;
+        t.width = width;
+        t.selectable = false;
+        t.text = text;
+        return t;
+    }
+
+    /**
+     * Create an uneditable/unselectable multiline Text widget with 100% width.
+     */
+    public static function createWideText (text :String, style :String = null) :Text
+    {
+        var t :Text = new Text();
+        t.styleName = style;
+        t.percentWidth = 100;
+        t.selectable = false;
+        t.text = text;
+        return t;
+    }
+
+    /**
+     * How hard would it have been for them make Spacer accept two optional arguments?
+     */
+    public static function createSpacer (width :int = 0, height :int = 0) :Spacer
+    {
+        var spacer :Spacer = new Spacer();
+        spacer.width = width;
+        spacer.height = height;
+        return spacer;
+    }
+
+    /**
+     * Return a count of how many visible (includeInLayout=true) children
+     * are in the specified container.
+     */
+    public static function countLayoutChildren (container :Container) :int
+    {
+        var layoutChildren :int = container.numChildren;
+        for each (var child :Object in container.getChildren()) {
+            if ((child is UIComponent) && !UIComponent(child).includeInLayout) {
+                layoutChildren--;
+            }
+        }
+        return layoutChildren;
+    }
+
+    /**
+     * In flex the 'visible' property controls visibility separate from whether
+     * the component takes up space in the layout, which is controlled by 'includeInLayout'.
+     * We usually want to set them together, so this does that for us.
+     * @return the new visible setting.
+     */
+    public static function setVisible (component :UIComponent, visible :Boolean) :Boolean
+    {
+        component.visible = visible;
+        component.includeInLayout = visible;
+        return visible;
+    }
+
+    /**
+     * Creates a new container of the given class and adds the given children to it.
+     */
+    public static function createContainer (clazz :Class, ...children) :Container
+    {
+        var container :Container = new clazz() as Container;
+        for each (var comp :UIComponent in children) {
+            container.addChild(comp);
+        }
+        return container;
+    }
+
+    /**
+     * Creates a new HBox container and adds the given children to it.
+     */
+    public static function createHBox (...children) :HBox
+    {
+        children.unshift(HBox);
+        return createContainer.apply(null, children) as HBox;
+    }
+
+    /**
+     * Creates a new VBox container and adds the given children to it.
+     */
+    public static function createVBox (...children) :VBox
+    {
+        children.unshift(VBox);
+        return createContainer.apply(null, children) as VBox;
+    }
+
+    /**
+     * Creates a simple UIComponent that wraps a display object.
+     */
+    public static function wrap (obj :DisplayObject) :FlexWrapper
+    {
+        return new FlexWrapper(obj);
+    }
+
+    /**
+     * Creates a simple UIComponent that wraps a display object and inherits its size.
+     */
+    public static function wrapSized (obj :DisplayObject) :FlexWrapper
+    {
+        return new FlexWrapper(obj, true);
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/FlexWrapper.as

@@ -0,0 +1,44 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObject;
+
+import mx.core.UIComponent;
+
+/**
+ * Wraps a non-Flex component for use in Flex. 
+ */
+public class FlexWrapper extends UIComponent
+{
+    public function FlexWrapper (object :DisplayObject, inheritSize :Boolean = false)
+    {
+        // don't capture mouse events in this wrapper
+        mouseEnabled = false;
+        addChild(object);
+        if (inheritSize) {
+            width = object.width;
+            height = object.height;
+        }
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/FunctionEffect.as

@@ -0,0 +1,52 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import mx.effects.IEffectInstance;
+import mx.effects.Effect;
+
+public class FunctionEffect extends Effect
+{
+    /** The function to call. */
+    public var func :Function;
+
+    /** The arguments to pass to the function. */
+    public var args :Array;
+
+    public function FunctionEffect (target :Object = null)
+    {
+        super(target);
+
+        instanceClass = FunctionEffectInstance;
+    }
+
+    // documentation inherited
+    override protected function initInstance (instance :IEffectInstance) :void
+    {
+        super.initInstance(instance);
+
+        var fe :FunctionEffectInstance = (instance as FunctionEffectInstance);
+        fe.func = func;
+        fe.args = args;
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/FunctionEffectInstance.as

@@ -0,0 +1,50 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import mx.effects.effectClasses.ActionEffectInstance;
+
+public class FunctionEffectInstance extends ActionEffectInstance
+{
+    public function FunctionEffectInstance (target :Object)
+    {
+        super(target);
+    }
+
+    /** The function to call. */
+    public var func :Function;
+
+    /** The args to pass. */
+    public var args :Array;
+
+    override public function play () :void
+    {
+        super.play();
+
+        // call the function!
+        func.apply(null, args);
+
+        // and we're done
+        finishRepeat();
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/GridUtil.as

@@ -0,0 +1,117 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import mx.containers.Grid;
+import mx.containers.GridItem;
+import mx.containers.GridRow;
+
+import mx.controls.Label;
+
+import mx.core.UIComponent;
+
+/**
+ * Convenience methods for adding children to Grids.
+ */
+public class GridUtil
+{
+    /**
+     * Add a new row to the grid, containing the specified
+     * components.
+     * 
+     * @param specs a list of components or Strings, or you can follow
+     * any component with a two-dimensional array that specifies
+     * grid width/height.
+     *
+     * Example: addRow(grid, "labeltxt", _entryField, _bigThing, [2, 2], _smallThing);
+     *
+     * All will be put in the same row, but bigThing will have
+     *  colspan=2 rowspan=2
+     */
+    public static function addRow (grid :Grid, ... specs) :GridRow
+    {
+        var row :GridRow = new GridRow();
+        var lastItem :GridItem;
+        for each (var o :Object in specs) {
+            if (o is String) {
+                var lbl :Label = new Label();
+                lbl.text = String(o);
+                o = lbl;
+            }
+            if (o is UIComponent) {
+                lastItem = addToRow(row, UIComponent(o));
+
+            } else if (o is Array) {
+                var arr :Array = (o as Array);
+                lastItem.colSpan = int(arr[0]);
+                lastItem.rowSpan = int(arr[1]);
+
+            } else {
+                throw new ArgumentError();
+            }
+        }
+        grid.addChild(row);
+        return row;
+    }
+
+    /**
+     * Add a child to the specified grid row, returning the
+     * GridItem created for containment of the child.
+     */
+    public static function addToRow (row :GridRow, comp :UIComponent) :GridItem
+    {
+        var item :GridItem = new GridItem();
+        item.addChild(comp);
+        row.addChild(item);
+        return item;
+    }
+
+    /**
+     * Get the number of cells in a grid.
+     */
+    public static function getCellCount (grid :Grid) :int
+    {
+        var count :int = 0;
+        for (var ii :int = 0; ii < grid.numChildren; ii++) {
+            count += (grid.getChildAt(ii) as GridRow).numChildren;
+        }
+        return count;
+    }
+
+    /**
+     * Return the contents of the specified cell. Not super fast, as it
+     * checks each row in order.
+     */
+    public static function getCellAt (grid :Grid, index :int) :UIComponent
+    {
+        for (var ii :int = 0; ii < grid.numChildren; ii++) {
+            var row :GridRow = grid.getChildAt(ii) as GridRow;
+            if (index < row.numChildren) {
+                return (row.getChildAt(index) as GridItem).getChildAt(0) as UIComponent;
+            } else {
+                index -= row.numChildren; // and then on to the next row
+            }
+        }
+        return null; // never found it. throw an out-of-range error?
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/KeyboardManager.as

@@ -0,0 +1,83 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.Stage;
+
+import flash.events.KeyboardEvent;
+import flash.events.MouseEvent;
+
+import flash.ui.Keyboard;
+
+import flash.utils.Dictionary;
+
+import mx.core.Application;
+import mx.controls.Button;
+
+
+public class KeyboardManager
+{
+    public static function setShortcut (trigger :*, keyCode :uint, ... modifiers) :void
+    {
+        _triggers[trigger] = [ keyCode, modifiers ];
+        ensureListening();
+    }
+
+    public static function clearShortcut (trigger :*) :void
+    {
+        delete _triggers[trigger];
+    }
+
+    protected static function ensureListening () :void
+    {
+        var stage :Stage = Application(Application.application).stage;
+        stage.addEventListener(KeyboardEvent.KEY_DOWN, handleKeyDown);
+    }
+
+    protected static function handleKeyDown (event :KeyboardEvent) :void
+    {
+        for (var trigger :* in _triggers) {
+            var info :Array = _triggers[trigger] as Array;
+            var keyCode :uint = info[0];
+            var modifiers :Array = info[1] as Array;
+            if (event.keyCode == keyCode &&
+//                    (event.altKey == (-1 != modifierCodes.indexOf(Keyboard.ALTERNATE))) &&
+                    (event.ctrlKey == (-1 != modifiers.indexOf(Keyboard.CONTROL))) &&
+                    (event.shiftKey == (-1 != modifiers.indexOf(Keyboard.SHIFT)))) {
+                wasTriggered(trigger);
+            }
+        }
+    }
+
+    protected static function wasTriggered (trigger :*) :void
+    {
+        if (trigger is Button) {
+            var button :Button = Button(trigger);
+            if (button.stage != null && button.enabled) {
+                button.dispatchEvent(new MouseEvent(MouseEvent.CLICK));
+            }
+        }
+    }
+
+    protected static const _triggers :Dictionary = new Dictionary(true);
+}
+}

aslib/src/main/as/com/threerings/flex/LabeledSlider.as

@@ -0,0 +1,75 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import mx.core.ScrollPolicy;
+
+import mx.containers.HBox;
+
+import mx.controls.Label;
+
+import mx.controls.sliderClasses.Slider;
+
+import mx.events.SliderEvent;
+
+/**
+ * A simple component that displays a label to the left of a slider.
+ */
+public class LabeledSlider extends HBox
+{
+    /** The actual slider. */
+    public var slider :Slider;
+
+    /**
+     * Create a LabeledSlider holding the specified slider.
+     */
+    public function LabeledSlider (slider :Slider, labelWidth :int = 17)
+    {
+        _label = new Label();
+        _label.text = String(slider.value);
+        _label.width = labelWidth;
+
+        horizontalScrollPolicy = ScrollPolicy.OFF;
+        setStyle("horizontalGap", 2);
+
+        addChild(_label);
+        this.slider = slider;
+        slider.showDataTip = false; // because we do it...
+        addChild(slider);
+
+        slider.addEventListener(SliderEvent.CHANGE, handleSliderChange, false, 0, true);
+    }
+
+    override public function set width (width :Number) :void
+    {
+        super.width = width;
+        slider.width = width - _label.width - 2;
+    }
+
+    protected function handleSliderChange (event :SliderEvent) :void
+    {
+        _label.text = String(event.value);
+    }
+
+    protected var _label :Label;
+}
+}

aslib/src/main/as/com/threerings/flex/LazyContainer.as

@@ -0,0 +1,58 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObjectContainer;
+
+import mx.core.ContainerCreationPolicy;
+import mx.core.UIComponent;
+import mx.containers.VBox;
+
+public class LazyContainer extends VBox
+{
+    /**
+     * Create a lazy container that will not create its children
+     * until needed.
+     *
+     * @param creation a function that takes no args and returns
+     * a UIComponent to be added to the container.
+     */
+    public function LazyContainer (creation :Function)
+    {
+        _creation = creation;
+        creationPolicy = ContainerCreationPolicy.NONE;
+    }
+
+    override public function createComponentsFromDescriptors (
+        recurse :Boolean = true) :void
+    {
+        super.createComponentsFromDescriptors(recurse);
+
+        if (_creation != null) {
+            addChild(_creation() as UIComponent);
+            _creation = null; // assist gc
+        }
+    }
+
+    protected var _creation :Function;
+}
+}

aslib/src/main/as/com/threerings/flex/LazyTabNavigator.as

@@ -0,0 +1,63 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import mx.core.ContainerCreationPolicy;
+
+import mx.core.UIComponent;
+
+import mx.containers.TabNavigator;
+import mx.containers.VBox;
+
+/**
+ * A tab navigator that is specially set up for lazy-creating the
+ * content in each tab.
+ */
+public class LazyTabNavigator extends TabNavigator
+{
+    public function LazyTabNavigator ()
+    {
+        super();
+    }
+
+    /**
+     * Add a tab to the container. The creation function takes no args and
+     * returns a UIComponent.
+     */
+    public function addTab (label :String, creation :Function) :void
+    {
+        addTabAt(label, creation, numChildren);
+    }
+
+    /**
+     * Add a tab to the container at the specified index.
+     * The creation function takes no args and returns a UIComponent.
+     */
+    public function addTabAt (
+        label :String, creation :Function, index :int) :void
+    {
+        var box :LazyContainer = new LazyContainer(creation);
+        box.label = label;
+        addChildAt(box, index);
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/LoadedAsset.as

@@ -0,0 +1,134 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.Loader;
+import flash.display.Sprite;
+
+import mx.core.IFlexAsset;
+import mx.core.IFlexDisplayObject;
+import mx.core.IInvalidating;
+
+import com.threerings.util.MultiLoader;
+
+/**
+ * An asset that can be used in Flex, that's loaded via a Loader.
+ */
+public class LoadedAsset extends Sprite
+    implements IFlexAsset, IFlexDisplayObject
+{
+    /**
+     * @param source a String (url) or URLRequest, or Class or a ByteArray.
+     */
+    public function LoadedAsset (source :Object) :void
+    {
+        MultiLoader.getLoaders(source, handleLoaded);
+    }
+
+    override public function get height () :Number
+    {
+        return (_loader == null) ? _measHeight : super.height;
+    }
+
+    override public function set height (value :Number) :void
+    {
+        if (_loader == null) {
+            _reqHeight = value;
+        } else {
+            _loader.height = value;
+        }
+    }
+
+    override public function get width () :Number
+    {
+        return (_loader == null) ? _measWidth : super.width;
+    }
+
+    override public function set width (value :Number) :void
+    {
+        if (_loader == null) {
+            _reqWidth = value;
+        } else {
+            _loader.width = value;
+        }
+    }
+
+    // from IFlexDisplayObject
+    public function get measuredHeight () :Number
+    {
+        return _measHeight;
+    }
+
+    // from IFlexDisplayObject
+    public function get measuredWidth () :Number
+    {
+        return _measWidth;
+    }
+
+    // from IFlexDisplayObject
+    public function move (x :Number, y :Number) :void
+    {
+        this.x = x;
+        this.y = y;
+    }
+
+    // from IFlexDisplayObject
+    public function setActualSize (newWidth :Number, newHeight :Number) :void
+    {
+        width = newWidth;
+        height = newHeight;
+    }
+
+    protected function handleLoaded (loader :Loader) :void
+    {
+        _loader = loader;
+        addChild(_loader);
+
+        // Note our measured size
+        _measWidth = loader.width;
+        _measHeight = loader.height;
+
+        // set any size that was set while we were being loaded
+        if (!isNaN(_reqWidth)) {
+            loader.width = _reqWidth;
+        }
+        if (!isNaN(_reqHeight)) {
+            loader.height = _reqHeight;
+        }
+
+        // if we have a parent that knows about sizes, tell it we now know our size
+        if (parent is IInvalidating) {
+            IInvalidating(parent).invalidateSize();
+        }
+    }
+
+    protected var _loader :Loader;
+
+    // initial / base sizes
+    protected var _measWidth :Number = 0;
+    protected var _measHeight :Number = 0;
+
+    // requested sizes, during loading
+    protected var _reqWidth :Number;
+    protected var _reqHeight :Number;
+}
+}

aslib/src/main/as/com/threerings/flex/PopUpUtil.as

@@ -0,0 +1,122 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import mx.core.UIComponent;
+
+import com.threerings.display.DisplayUtil;
+
+/**
+ * Flex popup utilities.
+ */
+public class PopUpUtil
+{
+    /**
+     * Center the popup inside the stage, to which it should already be added.
+     */
+    public static function center (popup :UIComponent) :void
+    {
+        centerInRect(popup, createStageRect(popup));
+    }
+
+    /**
+     * Center the popup within the specified rectangle.
+     */
+    public static function centerInRect (popup :UIComponent, rect :Rectangle) :void
+    {
+        var p :Point = DisplayUtil.centerRectInRect(new Rectangle(0, 0,
+            popup.getExplicitOrMeasuredWidth(), popup.getExplicitOrMeasuredHeight()), rect);
+        popup.x = p.x;
+        popup.y = p.y;
+    }
+
+    /**
+     * Fit the popup inside the stage.
+     */
+    public static function fit (popup :UIComponent) :void
+    {
+        fitInRect(popup, createStageRect(popup));
+    }
+
+    /**
+     * Fit the popup inside the specified rectangle.
+     */
+    public static function fitInRect (popup :UIComponent, rect :Rectangle) :void
+    {
+        var p :Point = DisplayUtil.fitRectInRect(createPopupRect(popup), rect);
+        popup.x = p.x;
+        popup.y = p.y;
+    }
+
+    /**
+     * Try to fit inside the specified rectangle, also avoiding other popups.
+     *
+     * @param popup the popup we'll try to move.
+     * @param bounds the boundary within which to place the popup.
+     * @param padding extra padding to place between popups (but not around the inside of
+     *        the bounds, do that yourself if you want it).
+     */
+    public static function avoidOtherPopups (
+        popup :UIComponent, bounds :Rectangle, padding :int = 0) :void
+    {
+        var avoid :Array = [];
+        var r :Rectangle;
+
+        // find the other popups we need to avoid
+        for (var ii :int = popup.parent.numChildren - 1; ii >= 0; ii--) {
+            var comp :UIComponent = popup.parent.getChildAt(ii) as UIComponent;
+            if (comp != null && comp.isPopUp && comp.visible && comp != popup) {
+                r = createPopupRect(comp);
+                r.inflate(padding, padding);
+                avoid.push(r);
+            }
+        }
+        
+        r = createPopupRect(popup);
+        // put the rectangle in-bounds, so that even if avoiding the others fails, we're
+        // at least in-bounds when fitRectInRect resets to the original position.
+        var p :Point = DisplayUtil.fitRectInRect(r, bounds);
+        r.x = p.x;
+        r.y = p.y; // assigning to topLeft adjusts width/height too, so don't do it!
+        DisplayUtil.positionRect(r, bounds, avoid);
+        popup.x = r.x;
+        popup.y = r.y;
+    }
+
+    /**
+     * Wee utility method.
+     */
+    protected static function createStageRect (popup :UIComponent) :Rectangle
+    {
+        return new Rectangle(0, 0, popup.stage.stageWidth, popup.stage.stageHeight);
+    }
+
+    protected static function createPopupRect (popup :UIComponent) :Rectangle
+    {
+        return new Rectangle(popup.x, popup.y,
+            popup.getExplicitOrMeasuredWidth(), popup.getExplicitOrMeasuredHeight());
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/ScrollBox.as

@@ -0,0 +1,181 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex {
+
+import flash.display.DisplayObject;
+import flash.display.Graphics;
+import flash.display.Shape;
+import flash.display.Sprite;
+
+import flash.events.Event;
+import flash.events.MouseEvent;
+
+import flash.geom.Matrix;
+import flash.geom.Rectangle;
+
+import mx.containers.Canvas;
+
+/**
+ * A control for scrolling some component separately.
+ */
+public class ScrollBox extends Canvas
+{
+    public function ScrollBox (
+        target :DisplayObject, maxWidth :int, maxHeight :int)
+    {
+        _target = target;
+        _maxWidth = maxWidth;
+        _maxHeight = maxHeight;
+
+        opaqueBackground = 0xFFFFFF;
+
+        _mask = new Shape();
+        rawChildren.addChild(_mask);
+        this.mask = _mask;
+
+        _box = new Sprite();
+        rawChildren.addChild(_box);
+
+        recheckBounds();
+
+        // TODO: only when something changes
+        addEventListener(Event.ENTER_FRAME, enterFrame);
+
+        _box.addEventListener(MouseEvent.MOUSE_DOWN, spritePressed);
+    }
+
+    override public function setActualSize (w :Number, h :Number) :void
+    {
+        super.setActualSize(w, h);
+
+        recheckBounds();
+
+        graphics.clear();
+        graphics.lineStyle(1, 0x000000, 1.0);
+        graphics.drawRect(0, 0, width, height);
+
+        var g :Graphics = _mask.graphics;
+        g.clear();
+        g.beginFill(0xffffff, 0.0);
+        g.drawRect(0, 0, width, height);
+        g.endFill();
+    }
+
+    protected function enterFrame (vent :Event) :void
+    {
+        if (!_dragging) {
+            recheckBounds();
+        }
+    }
+
+    /**
+     * Get the bounds of the scrollable area. Broken-out for easy overridding.
+     */
+    protected function getScrollBounds () :Rectangle
+    {
+        var bounds :Rectangle = _target.transform.pixelBounds;
+//        var m :Matrix = _target.transform.concatenatedMatrix;
+//        bounds.topLeft = m.transformPoint(bounds.topLeft);
+//        bounds.bottomRight = m.transformPoint(bounds.bottomRight);
+        return bounds;
+    }
+
+    protected function recheckBounds () :void
+    {
+        var bounds :Rectangle = getScrollBounds();
+
+        // see what's visible, what's not..
+        var scroller :Rectangle = _target.scrollRect;
+        if (scroller == null) {
+            scroller = bounds.clone();
+        }
+
+        if ((_bounds != null) && _bounds.equals(bounds) &&
+                (_scroller != null) && _scroller.equals(scroller)) {
+            return;
+        }
+
+        _bounds = bounds.clone();
+        _scroller = scroller;
+
+        _scale = Math.min(1, Math.min(_maxWidth / _bounds.width, _maxHeight / _bounds.height));
+
+        width = _scale * _bounds.width;
+        height = _scale * _bounds.height;
+
+        drawBox(_box, _scroller.width * _scale, _scroller.height * _scale);
+
+        _box.x = (_scroller.x - _bounds.x) * _scale;
+        _box.y = (_scroller.y - _bounds.y) * _scale;
+    }
+
+    protected function drawBox (box :Sprite, ww :Number, hh :Number) :void
+    {
+        var g :Graphics = _box.graphics;
+        g.clear();
+        g.beginFill(0xffffff, 0.3);
+        g.lineStyle(1, 0x000000, 0.3);
+        g.drawRect(0, 0, ww, hh);
+        g.endFill();
+    }
+
+    protected function spritePressed (evt :MouseEvent) :void
+    {
+        _box.addEventListener(Event.ENTER_FRAME, boxUpdate);
+        _box.startDrag(true,
+            new Rectangle(0, 0, width - _box.width, height - _box.height));
+        stage.addEventListener(MouseEvent.MOUSE_UP, spriteReleased);
+        _dragging = true;
+    }
+
+    protected function spriteReleased (evt :MouseEvent) :void
+    {
+        stage.removeEventListener(MouseEvent.MOUSE_UP, spriteReleased);
+        _box.stopDrag();
+        _box.removeEventListener(Event.ENTER_FRAME, boxUpdate);
+        _dragging = false;
+    }
+
+    protected function boxUpdate (evt :Event) :void
+    {
+        var r :Rectangle = _target.scrollRect;
+        r.x = (_box.x / _scale) + _bounds.x;
+        r.y = (_box.y / _scale) + _bounds.y;
+        _target.scrollRect = r;
+    }
+
+    protected var _dragging :Boolean;
+
+    protected var _target :DisplayObject;
+
+    protected var _maxWidth :int;
+    protected var _maxHeight :int;
+
+    protected var _box :Sprite;
+    protected var _mask :Shape;
+
+    protected var _scale :Number;
+
+    protected var _bounds :Rectangle;
+    protected var _scroller :Rectangle;
+}
+}

aslib/src/main/as/com/threerings/flex/menuClasses/CommandListData.as

@@ -0,0 +1,42 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex.menuClasses {
+
+import mx.core.IFlexDisplayObject;
+import mx.core.IUIComponent;
+
+import mx.controls.menuClasses.MenuListData;
+
+public class CommandListData extends MenuListData
+{
+    /** An already-instantiated icon, to use if the icon property is null. */
+    public var iconObject :IFlexDisplayObject;
+
+    public function CommandListData (text :String, icon :Class, iconObject :IFlexDisplayObject,
+        labelField :String, uid :String, owner :IUIComponent,
+        rowIndex :int = 0, columnIndex :int = 0)
+    {
+        super(text, icon, labelField, uid, owner, rowIndex, columnIndex);
+        this.iconObject = iconObject;
+    }
+}
+}

aslib/src/main/as/com/threerings/flex/menuClasses/CommandMenuItemRenderer.as

@@ -0,0 +1,61 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.flex.menuClasses {
+
+import flash.display.DisplayObject;
+
+import mx.controls.Menu;
+import mx.controls.menuClasses.IMenuDataDescriptor;
+import mx.controls.menuClasses.MenuItemRenderer;
+
+public class CommandMenuItemRenderer extends MenuItemRenderer
+{
+    public function CommandMenuItemRenderer ()
+    {
+        super();
+    }
+
+    override protected function commitProperties () :void
+    {
+        super.commitProperties();
+        // Note: a menu with no items will have a null listData
+
+        if ((icon == null) && (listData is CommandListData)) {
+            icon = CommandListData(listData).iconObject;
+            if (icon != null) {
+                addChild(DisplayObject(icon));
+            }
+        }
+
+        if (label.visible && (listData != null)) {
+            var dataDescriptor :IMenuDataDescriptor = Menu(listData.owner).dataDescriptor;
+            var typeVal :String = dataDescriptor.getType(data);
+            if (typeVal == "title") {
+                dataDescriptor.setEnabled(data, false);
+                label.enabled = false;
+                label.styleName = "menuTitle";
+                invalidateDisplayList();
+            }
+        }
+    }
+}
+}

aslib/src/main/as/com/threerings/media/Tickable.as

@@ -0,0 +1,28 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media {
+
+public interface Tickable
+{
+    function tick (tickStamp :int) :void;
+}
+}

aslib/src/main/as/com/threerings/media/Ticker.as

@@ -0,0 +1,79 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media {
+
+import flash.events.TimerEvent;
+import flash.utils.Timer;
+
+import com.threerings.util.Arrays;
+
+/**
+ * Registers objects that wish to be sent a tick() call once per frame.
+ */
+public class Ticker
+{
+    public function start () :void
+    {
+        _t.addEventListener(TimerEvent.TIMER, handleTimer);
+        _start = new Date().time;
+        _t.start();
+    }
+
+    public function stop () :void
+    {
+        _t.removeEventListener(TimerEvent.TIMER, handleTimer);
+        _t.stop();
+
+    }
+
+    public function handleTimer (event :TimerEvent) :void
+    {
+        tick(int(new Date().time - _start));
+    }
+
+    protected function tick (tickStamp :int) :void
+    {
+        for each (var tickable :Tickable in _tickables) {
+            tickable.tick(tickStamp);
+        }
+    }
+
+    public function registerTickable (tickable :Tickable) :void
+    {
+        _tickables.push(tickable);
+    }
+
+    public function removeTickable (tickable :Tickable) :void
+    {
+        Arrays.removeFirst(_tickables, tickable);
+    }
+
+    /** Everyone who wants to hear about our ticks. */
+    protected var _tickables :Array = [];
+
+    /** A timer that will fire every "frame". */
+    protected var _t :Timer = new Timer(1);
+
+    /** What time our ticker started running - tickStamps will be relative to this time. */
+    protected var _start :Number;
+}
+}

aslib/src/main/as/com/threerings/media/image/ClassRecord.as

@@ -0,0 +1,170 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.image {
+
+import com.threerings.util.Log;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.util.RandomUtil;
+import com.threerings.util.StringUtil;
+
+public class ClassRecord
+{
+    private const log :Log = Log.getLog(ClassRecord);
+
+    /** An integer identifier for this class. */
+    public var classId :int;
+
+    /** The name of the color class. */
+    public var name :String;
+
+    /** The source color to use when recoloring colors in this class. */
+    public var source :uint;
+
+    /** Data identifying the range of colors around the source color
+     * that will be recolored when recoloring using this class. */
+    public var range :Array;
+
+    /** The default starting legality value for this color class. See
+     * {@link ColorRecord#starter}. */
+    public var starter :Boolean;
+
+    /** The default colorId to use for recoloration in this class, or
+     * 0 if there is no default defined. */
+    public var defaultId :int;
+
+    /** A table of target colors included in this class. */
+    public var colors :Map = Maps.newMapOf(int);
+
+    /** Used when parsing the color definitions. */
+    public function addColor (record :ColorRecord) :void
+    {
+        // validate the color id
+        if (record.colorId > 127) {
+            log.warning("Refusing to add color record; colorId > 127",
+                        "class", this, "record", record);
+        } else if (colors.containsKey(record.colorId)) {
+            log.warning("Refusing to add duplicate colorId",
+                        "class", this, "record", record, "existing", colors.get(record.colorId));
+        } else {
+            record.cclass = this;
+            colors.put(record.colorId, record);
+        }
+    }
+
+    /**
+     * Translates a color identified in string form into the id that should be used to look up
+     * its information. Throws an exception if no color could be found that associates with
+     * that name.
+     */
+    public function getColorId (name :String) :int
+    {
+        // Check if the string is itself a number
+        var id :int = name as int;
+        if (colors.containsKey(id)) {
+            return id;
+        }
+
+        // Look for name matches among all colors
+        for each (var color :ColorRecord in colors.values()) {
+                if (StringUtil.compareIgnoreCase(color.name, name) == 0) {
+                return color.colorId;
+            }
+        }
+
+        // That input wasn't a color
+        throw new Error("No color named '" + name + "'", 0);
+    }
+
+    /** Returns a random starting id from the entries in this class. */
+    public function randomStartingColor () :ColorRecord
+    {
+        // figure out our starter ids if we haven't already
+        if (_starters == null) {
+            _starters = [];
+            for each (var color :ColorRecord in colors) {
+                if (color.starter) {
+                    _starters.push(color);
+                }
+            }
+        }
+
+        // sanity check
+        if (_starters.length < 1) {
+            log.warning("Requested random starting color from colorless component class",
+                        "class", this);
+            return null;
+        }
+
+        // return a random entry from the array
+        return RandomUtil.pickRandom(_starters);
+    }
+
+    /**
+     * Get the default ColorRecord defined for this color class, or
+     * null if none.
+     */
+    public function getDefault () :ColorRecord
+    {
+        return colors.get(defaultId);
+    }
+
+    public function toString () :String
+    {
+        return "[id=" + classId + ", name=" + name + ", source=#" +
+            StringUtil.toHex(source & 0xFFFFFF, 6) +
+            ", range=" + StringUtil.toString(range) +
+            ", starter=" + starter + ", colors=" +
+            StringUtil.toString(colors.values()) + "]";
+    }
+
+    public static function fromXml (xml :XML) :ClassRecord
+    {
+        var rec :ClassRecord = new ClassRecord();
+        rec.classId = xml.@classId;
+        for each (var colorXml :XML in xml.color) {
+            rec.colors.put(int(colorXml.@colorId), ColorRecord.fromXml(colorXml, rec));
+        }
+
+        rec.name = xml.@name;
+        var srcStr :String = xml.@source;
+        rec.source = parseInt(srcStr.substr(1, srcStr.length - 1), 16);
+        rec.range = toNumArray(xml.@range);
+        rec.defaultId = xml.@defaultId;
+
+        return rec;
+    }
+
+    protected static function toNumArray (str :String) :Array
+    {
+        if (str == null) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :*, index :int, arr :Array) :Number {
+            return Number(element);
+        });
+    }
+
+    protected var _starters :Array;
+}
+}

aslib/src/main/as/com/threerings/media/image/ColorPository.as

@@ -0,0 +1,215 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.image {
+
+import com.threerings.util.Log;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.util.StringUtil;
+
+public class ColorPository
+{
+    private const log :Log = Log.getLog(ColorPository);
+
+    public function getClasses () :Array
+    {
+        return _classes.values();
+    }
+
+    /**
+     * Returns an array containing the records for the colors in the
+     * specified class.
+     */
+    public function getColors (className :String) :Array
+    {
+        // make sure the class exists
+        var record :ClassRecord = getClassRecordByName(className);
+        if (record == null) {
+            return null;
+        }
+
+        // create the array
+        return record.colors.values();
+    }
+
+    /**
+     * Returns an array containing the ids of the colors in the specified
+     * class.
+     */
+    public function getColorIds (className :String) :Array
+    {
+        // make sure the class exists
+        var record :ClassRecord = getClassRecordByName(className);
+        if (record == null) {
+            return null;
+        }
+
+        return record.colors.values().map(
+            function(element :ColorRecord, index :int, arr :Array) :int {
+                return element.colorId;
+            });
+    }
+
+    /**
+     * Returns true if the specified color is legal for use at character creation time. false is
+     * always returned for non-existent colors or classes.
+     */
+    public function isLegalStartColor (classId :int, colorId :int) :Boolean
+    {
+        var color :ColorRecord = getColorRecord(classId, colorId);
+        return (color == null) ? false : color.starter;
+    }
+
+    /**
+     * Returns a random starting color from the specified color class.
+     */
+    public function getRandomStartingColor (className :String) :ColorRecord
+    {
+        // make sure the class exists
+        var record :ClassRecord = getClassRecordByName(className);
+        return (record == null) ? null : record.randomStartingColor();
+    }
+
+    /**
+     * Looks up a colorization by id.
+     */
+    public function getColorization (classId :int, colorId :int) :Colorization
+    {
+        var color :ColorRecord = getColorRecord(classId, colorId);
+        return (color == null) ? null : color.getColorization();
+    }
+
+    /**
+     * Looks up a colorization by color print.
+     */
+    public function getColorizationByPrint (colorPrint :int) :Colorization
+    {
+        return getColorization(colorPrint >> 8, colorPrint & 0xFF);
+    }
+
+    /**
+     * Looks up a colorization by class and color names.
+     */
+    public function getColorizationByName (className :String, colorName :String) :Colorization
+    {
+        var crec :ClassRecord = getClassRecordByName(className);
+        if (crec != null) {
+            var colorId :int = crec.getColorId(colorName);
+
+            var color :ColorRecord = crec.colors.get(colorId);
+            if (color != null) {
+                return color.getColorization();
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Looks up a colorization by class and color Id.
+     */
+    public function getColorizationByNameAndId (className :String, colorId :int) :Colorization
+    {
+        var crec :ClassRecord = getClassRecordByName(className);
+        if (crec != null) {
+            var color :ColorRecord = crec.colors.get(colorId);
+            if (color != null) {
+                return color.getColorization();
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Loads up a colorization class by name and logs a warning if it doesn't exist.
+     */
+    public function getClassRecordByName (className :String) :ClassRecord
+    {
+        for each (var crec :ClassRecord in _classes.values()) {
+            if (crec.name == className) {
+                return crec;
+            }
+        }
+        log.warning("No such color class", "class", className, new Error());
+        return null;
+    }
+
+    /**
+     * Looks up the requested color class record.
+     */
+    public function getClassRecord (classId :int) :ClassRecord
+    {
+        return _classes.get(classId);
+    }
+
+    /**
+     * Looks up the requested color record.
+     */
+    public function getColorRecord (classId :int, colorId :int) :ColorRecord
+    {
+        var record :ClassRecord = getClassRecord(classId);
+        if (record == null) {
+            // if they request color class zero, we assume they're just
+            // decoding a blank colorprint, otherwise we complain
+            if (classId != 0) {
+                log.warning("Requested unknown color class",
+                    "classId", classId, "colorId", colorId, new Error());
+            }
+            return null;
+        }
+        return record.colors.get(colorId);
+    }
+
+    /**
+     * Looks up the requested color record by class & color names.
+     */
+    public function getColorRecordByName (className :String, colorName :String) :ColorRecord
+    {
+        var record :ClassRecord = getClassRecordByName(className);
+        if (record == null) {
+            log.warning("Requested unknown color class",
+                "className", className, "colorName", colorName, new Error());
+            return null;
+        }
+
+        var colorId :int = record.getColorId(colorName);
+
+        return record.colors.get(colorId);
+    }
+
+    /**
+     * Loads up a serialized color pository from the supplied resource
+     * manager.
+     */
+    public static function fromXml (xml :XML) :ColorPository
+    {
+        var pos :ColorPository = new ColorPository();
+        for each (var classXml :XML in xml.elements("class")) {
+            pos._classes.put(int(classXml.@classId), ClassRecord.fromXml(classXml));
+        }
+
+        return pos;
+    }
+
+    /** Our mapping from class names to class records. */
+    protected var _classes :Map = Maps.newMapOf(int);
+}
+}

aslib/src/main/as/com/threerings/media/image/ColorRecord.as

@@ -0,0 +1,103 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.image {
+
+import com.threerings.util.Log;
+import com.threerings.util.StringUtil;
+
+public class ColorRecord
+{
+    private const log :Log = Log.getLog(ColorRecord);
+
+    /** The colorization class to which we belong. */
+    public var cclass :ClassRecord;
+
+    /** A unique colorization identifier (used in fingerprints). */
+    public var colorId :int;
+
+    /** The name of the target color. */
+    public var name :String;
+
+    /** Data indicating the offset (in HSV color space) from the
+     * source color to recolor to this color. */
+    public var offsets :Array;
+
+    /** Tags this color as a legal starting color or not. This is a
+     * shameful copout, placing application-specific functionality
+     * into a general purpose library class. */
+    public var starter :Boolean;
+
+    /**
+     * Returns a value that is the composite of our class id and color
+     * id which can be used to identify a colorization record. This
+     * value will always be a positive integer that fits into 16 bits.
+     */
+    public function getColorPrint () :int
+    {
+        return ((cclass.classId << 8) | colorId);
+    }
+
+    /**
+     * Returns the data in this record configured as a colorization
+     * instance.
+     */
+    public function getColorization () :Colorization
+    {
+        return new Colorization(getColorPrint(), cclass.source,
+                                cclass.range, offsets);
+    }
+
+    public function toString () :String
+    {
+        return "[id=" + colorId + ", name=" + name +
+            ", offsets=" + StringUtil.toString(offsets) +
+            ", starter=" + starter + "]";
+    }
+
+
+    public static function fromXml (xml :XML, cclass :ClassRecord) :ColorRecord
+    {
+        var rec :ColorRecord = new ColorRecord();
+        rec.colorId = xml.@colorId;
+        rec.name = xml.@name;
+        rec.offsets = toNumArray(xml.@offsets);
+        rec.starter = xml.@starter;
+        rec.cclass = cclass;
+
+        return rec;
+    }
+
+    protected static function toNumArray (str :String) :Array
+    {
+        if (str == null) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :String, index :int, arr :Array) :Number {
+            return Number(StringUtil.trim(element));
+        });
+    }
+
+    /** Our data represented as a colorization. */
+    protected var _zation :Colorization;
+}
+}

aslib/src/main/as/com/threerings/media/image/Colorization.as

@@ -0,0 +1,185 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.image {
+
+import com.threerings.display.ColorUtil;
+import com.threerings.util.Hashable;
+import com.threerings.util.Short;
+import com.threerings.util.StringUtil;
+
+public class Colorization
+    implements Hashable
+{
+    /** Every colorization must have a unique id that can be used to
+     * compare a particular colorization record with another. */
+    public var colorizationId :int;
+
+    /** The root color for the colorization. */
+    public var rootColor :uint;
+
+    /** The range around the root color that will be colorized (in
+     * delta-hue, delta-saturation, delta-value. Note that this range is inclusive. */
+    public var range :Array;
+
+    /** The adjustments to make to hue, saturation and value. */
+    public var offsets :Array;
+
+    /**
+     * Constructs a colorization record with the specified identifier.
+     */
+    public function Colorization (colorizationId :int, rootColor :uint,
+                                  range :Array, offsets :Array)
+    {
+        this.colorizationId = colorizationId;
+        this.rootColor = rootColor;
+        this.range = range;
+        this.offsets = offsets;
+
+        // compute our HSV and fixed HSV
+        _hsv = ColorUtil.RGBtoHSB(ColorUtil.getRed(rootColor), ColorUtil.getGreen(rootColor),
+             ColorUtil.getBlue(rootColor));
+        _fhsv = toFixedHSV(_hsv);
+    }
+
+    /**
+     * Returns the root color adjusted by the colorization.
+     */
+    public function getColorizedRoot () :uint
+    {
+        return recolorColor(_hsv);
+    }
+
+    /**
+     * Adjusts the supplied color by the offests in this colorization,
+     * taking the appropriate measures for hue (wrapping it around) and
+     * saturation and value (clipping).
+     *
+     * @return the RGB value of the recolored color.
+     */
+    public function recolorColor (hsv :Array) :uint
+    {
+        // for hue, we wrap around
+        var hue :Number = hsv[0] + offsets[0];
+        if (hue > 1.0) {
+            hue -= 1.0;
+        }
+
+        // otherwise we clip
+        var sat :Number = Math.min(Math.max(hsv[1] + offsets[1], 0), 1);
+        var val :Number = Math.min(Math.max(hsv[2] + offsets[2], 0), 1);
+
+        // convert back to RGB space
+        return ColorUtil.HSBtoRGB(hue, sat, val);
+    }
+
+    /**
+     * Returns true if this colorization matches the supplied color, false
+     * otherwise.
+     *
+     * @param hsv the HSV values for the color in question.
+     * @param fhsv the HSV values converted to fixed point via {@link
+     * #toFixedHSV} for the color in question.
+     */
+    public function matches (hsv :Array, fhsv :Array) :Boolean
+    {
+        // check to see that this color is sufficiently "close" to the
+        // root color based on the supplied distance parameters
+        if (distance(fhsv[0], _fhsv[0], Short.MAX_VALUE) >
+            range[0] * Short.MAX_VALUE) {
+            return false;
+        }
+
+        // saturation and value don't wrap around like hue
+        if (Math.abs(_hsv[1] - hsv[1]) > range[1] ||
+            Math.abs(_hsv[2] - hsv[2]) > range[2]) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function hashCode () :int
+    {
+        return colorizationId ^ rootColor;
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        if (other is Colorization) {
+            return (Colorization(other)).colorizationId == colorizationId;
+        } else {
+            return false;
+        }
+    }
+
+    public function toString () :String
+    {
+        return String(colorizationId);
+    }
+
+    /**
+     * Returns a long string representation of this colorization.
+     */
+    public function toVerboseString () :String
+    {
+        return StringUtil.toString(this);
+    }
+
+    /**
+     * Converts floating point HSV values to a fixed point integer
+     * representation.
+     *
+     * @param hsv the HSV values to be converted.
+     * @param fhsv the destination array into which the fixed values will
+     * be stored. If this is null, a new array will be created of the
+     * appropriate length.
+     *
+     * @return the <code>fhsv</code> parameter if it was non-null or the
+     * newly created target array.
+     */
+    public static function toFixedHSV (hsv :Array) :Array
+    {
+        var fhsv :Array = new Array(hsv.length);
+
+        for (var ii :int = 0; ii < hsv.length; ii++) {
+            fhsv[ii] = int(hsv[ii] * Short.MAX_VALUE);
+        }
+        return fhsv;
+    }
+
+    /**
+     * Returns the distance between the supplied to numbers modulo N.
+     */
+    public static function distance (a :int, b :int, N :int) :int
+    {
+        return (a > b) ? Math.min(a - b, b + N - a) : Math.min(b - a, a + N - b);
+    }
+
+    /** Fixed HSV values for our root color; used when calculating
+     * recolorizations using this colorization. */
+    protected var _fhsv :Array;
+
+    /** HSV values for our root color; used when calculating
+     * recolorizations using this colorization. */
+    protected var _hsv :Array;
+}
+}

aslib/src/main/as/com/threerings/media/image/PngRecolorUtil.as

@@ -0,0 +1,212 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.image {
+
+import flash.utils.ByteArray;
+
+import com.threerings.display.ColorUtil;
+import com.threerings.util.Log;
+import com.threerings.util.StringUtil;
+
+import com.threerings.util.F;
+public class PngRecolorUtil
+{
+    private static const log :Log = Log.getLog(PngRecolorUtil);
+
+    protected static function isPng (bytes :ByteArray) :Boolean
+    {
+        if (bytes.length < PNG_HEADER.length) {
+            return false;
+        }
+        for (var ii :int = 0; ii < PNG_HEADER.length; ii++) {
+            if (PNG_HEADER[ii] != bytes[ii]) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+
+    /**
+     * Find the required chunks in the bytes that represent a PNG image.  All of the chunks that
+     * are succesfully found are pushed into the returned array in the order in which they were
+     * found in the image.
+     */
+    protected static function findChunks (pngBytes :ByteArray, chunkTypes :Array) :Array
+    {
+        var chunks :Array = [];
+        if (chunkTypes.length < 1) {
+            return chunks;
+        }
+
+        for (var ii :int = PNG_HEADER.length; ii < pngBytes.length;) {
+            pngBytes.position = ii;
+            var chunk :PngChunk =
+                new PngChunk(ii + 8, pngBytes.readInt(), pngBytes.readUTFBytes(4));
+
+            var idx :int = chunkTypes.indexOf(chunk.type);
+            if (idx >= 0) {
+                chunks.push(chunk);
+                if (chunkTypes.length == 1) {
+                    return chunks;
+                } else {
+                    chunkTypes.splice(idx, 1);
+                }
+            }
+
+            // 4 bytes each for length, chunk type and CRC
+            ii += 12 + chunk.length;
+        }
+        return chunks;
+    }
+
+    public static function recolorPNG (pngBytes :ByteArray,
+        colors :Array/* of Colorization */) :ByteArray
+    {
+        if (colors == null || colors.length == 0) {
+            return pngBytes;
+        }
+
+        // first, lets make sure we really have a PNG
+        if (!isPng(pngBytes)) {
+            log.warning("recolorPNG received invalid pngBytes", new Error());
+            return pngBytes;
+        }
+
+        var chunks :Array = findChunks(pngBytes, [HEADER_CHUNK, PALETTE_CHUNK]);
+        if (chunks.length != 2 || (chunks[0] as PngChunk).type != HEADER_CHUNK) {
+            log.warning("recolorPNG received an unexected PNG format", "requiredChunksFound",
+                chunks.length, new Error());
+            return pngBytes;
+        }
+        var header :PngChunk = chunks[0] as PngChunk;
+        var palette :PngChunk = chunks[1] as PngChunk;
+        // Check to make sure the header declares this to be an indexed-color PNG
+        var colorType :int = pngBytes[header.idx + COLOR_TYPE_IDX];
+        if (colorType != INDEXED_COLOR_TYPE) {
+            log.warning(
+                "Color Type in PNG header is not indexed-color", "type", colorType, new Error());
+            return pngBytes;
+        }
+
+        initializeCRCTable();
+        // CRC starts with chunk type
+        var crc :uint = 0xFFFFFFFF;
+        for (var ii :int = 0; ii < 4; ii++) {
+            crc = crcCalc(crc, PALETTE_CHUNK.charCodeAt(ii));
+        }
+        pngBytes.position = palette.idx;
+        for (ii = palette.idx; ii < palette.idx + palette.length; ii += 3) {
+            var red :uint = pngBytes.readUnsignedByte();
+            var green :uint = pngBytes.readUnsignedByte();
+            var blue :uint = pngBytes.readUnsignedByte();
+
+            var hsv :Array = ColorUtil.RGBtoHSB(red, green, blue);
+            var fhsv :Array = Colorization.toFixedHSV(hsv);
+            for each (var color :Colorization in colors) {
+                if (color != null && color.matches(hsv, fhsv)) {
+                    var newRgb :uint = color.recolorColor(hsv);
+                    pngBytes[ii] = red = ColorUtil.getRed(newRgb);
+                    pngBytes[ii + 1] = green = ColorUtil.getGreen(newRgb);
+                    pngBytes[ii + 2] = blue = ColorUtil.getBlue(newRgb);
+                    break;
+                }
+            }
+
+            crc = F.foldl([red, green, blue], crc, crcCalc);
+        }
+        crc = uint(crc ^ uint(0xFFFFFFFF));
+        // write out the CRC for the modified color table
+        pngBytes.position = palette.idx + palette.length;
+        pngBytes.writeUnsignedInt(crc);
+
+        return pngBytes;
+    }
+
+    protected static function initializeCRCTable () :void
+    {
+        if (_crcTable != null) {
+            return;
+        }
+
+        _crcTable = [];
+        for (var n :uint = 0; n < 256; n++)
+        {
+            var c :uint = n;
+            for (var k :uint = 0; k < 8; k++)
+            {
+                if (c & 1) {
+                    c = uint(uint(0xedb88320) ^ uint(c >>> 1));
+                } else {
+                    c = uint(c >>> 1);
+                }
+            }
+            _crcTable[n] = c;
+        }
+    }
+
+    protected static function crcCalc (crc :uint, byte :uint) :uint
+    {
+        return uint(_crcTable[(crc ^ byte) & uint(0xFF)] ^ uint(crc >>> 8));
+    }
+
+    /** The amount to pad error messages by. */
+    private static const ERROR_PADDING :int = 5;
+
+    /** Various Png-recolor related constants. */
+    protected static const PNG_HEADER :Array =
+        [ 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A ];
+    protected static const PALETTE_CHUNK :String = "PLTE";
+    protected static const HEADER_CHUNK :String = "IHDR";
+    protected static const COLOR_TYPE_IDX :int = 9;
+    protected static const INDEXED_COLOR_TYPE :int = 3;
+
+    protected static var _crcTable :Array;
+}
+}
+
+import com.threerings.util.StringUtil;
+
+/** Used for recoloring pngs. */
+class PngChunk
+{
+    /** The index of the beginning of the data section of the chunk. */
+    public var idx :int;
+
+    /** The length of the data section of the chunk. */
+    public var length :int;
+
+    /** The type of this chunk. */
+    public var type :String;
+
+    public function PngChunk (idx :int, length :int, type :String)
+    {
+        this.idx = idx;
+        this.length = length;
+        this.type = type;
+    }
+
+    public function toString () :String
+    {
+        return StringUtil.simpleToString(this);
+    }
+}

aslib/src/main/as/com/threerings/media/tile/BaseTile.as

@@ -0,0 +1,83 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+public class BaseTile extends Tile
+{
+    /**
+     * Returns whether or not this tile can be walked upon by character
+     * sprites.
+     */
+    public function isPassable () :Boolean
+    {
+        return _passable;
+    }
+
+    /**
+     * Configures this base tile as passable or impassable.
+     */
+    public function setPassable (passable :Boolean) :void
+    {
+        _passable = passable;
+    }
+
+    /**
+     * Returns the x offset into the tile image of the origin (which will be aligned with the
+     * bottom center of the origin tile) or <code>Integer.MIN_VALUE</code> if the origin is not
+     * explicitly specified and should be computed from the image size and tile footprint.
+     */
+    public override function getOriginX () :int
+    {
+        return getWidth()/2;
+    }
+
+    /**
+     * Returns the y offset into the tile image of the origin (which will be aligned with the
+     * bottom center of the origin tile) or <code>Integer.MIN_VALUE</code> if the origin is not
+     * explicitly specified and should be computed from the image size and tile footprint.
+     */
+    public override function getOriginY () :int
+    {
+        return getHeight();
+    }
+
+
+    /**
+     * Returns the object footprint width in tile units.
+     */
+    public override function getBaseWidth () :int
+    {
+        return 1;
+    }
+
+    /**
+     * Returns the object footprint height in tile units.
+     */
+    public override function getBaseHeight () :int
+    {
+        return 1;
+    }
+
+    /** Whether the tile is passable. */
+    protected var _passable :Boolean = true;
+}
+}

aslib/src/main/as/com/threerings/media/tile/BaseTileSet.as

@@ -0,0 +1,92 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import com.threerings.util.Arrays;
+import com.threerings.util.StringUtil;
+
+public class BaseTileSet extends SwissArmyTileSet
+{
+    /**
+     * Sets the passability information for the tiles in this tileset.
+     * Each entry in the array corresponds to the tile at that tile index.
+     */
+    public function setPassability (passable :Array) :void
+    {
+        _passable = passable;
+    }
+
+    /**
+     * Returns the passability information for the tiles in this tileset.
+     */
+    public function getPassability () :Array
+    {
+        return _passable;
+    }
+
+    override protected function createTile () :Tile
+    {
+        return new BaseTile();
+    }
+
+    override protected function initTile (tile :Tile, tileIndex :int, zations :Array) :void
+    {
+        super.initTile(tile, tileIndex, zations);
+        (BaseTile(tile)).setPassable(_passable[tileIndex]);
+    }
+
+    override protected function toStringBuf (buf :String) :String
+    {
+        buf = super.toStringBuf(buf);
+        buf = buf.concat(", passable=", StringUtil.toString(_passable));
+        return buf;
+    }
+
+    public static function fromXml (xml :XML) :SwissArmyTileSet
+    {
+        var set :BaseTileSet = new BaseTileSet();
+        set.populateFromXml(xml);
+        return set;
+    }
+
+    override protected function populateFromXml (xml :XML) :void
+    {
+        super.populateFromXml(xml);
+        _passable = toBoolArray(xml.passable);
+    }
+
+    override public function populateClone (clone :TileSet) :void
+    {
+        super.populateClone(clone);
+        var bClone :BaseTileSet = BaseTileSet(clone);
+        bClone._passable = _passable == null ? null : Arrays.copyOf(_passable);
+    }
+
+    override public function createClone () :TileSet
+    {
+        return new BaseTileSet();
+    }
+
+    /** Whether each tile is passable. */
+    protected var _passable :Array;
+}
+}

aslib/src/main/as/com/threerings/media/tile/Colorizer.as

@@ -0,0 +1,36 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import com.threerings.media.image.Colorization;
+
+public interface Colorizer
+{
+    /**
+     * Returns the colorization to be used for the specified named colorization class.
+     *
+     * @param index the index of the colorization being requested in the tileset's colorization
+     * list.
+     */
+    function getColorization (index :int, zation :String) :Colorization;
+}
+}

aslib/src/main/as/com/threerings/media/tile/DataPackTileSetRepository.as

@@ -0,0 +1,261 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import nochump.util.zip.ZipEntry;
+
+import flash.net.URLLoader;
+import flash.net.URLLoaderDataFormat;
+import flash.net.URLRequest;
+import flash.events.Event;
+import flash.utils.ByteArray;
+
+import com.threerings.io.ObjectInputStream;
+import com.threerings.media.tile.TileDataPack;
+import com.threerings.media.tile.bundle.TileSetBundle;
+import com.threerings.util.DataPack;
+import com.threerings.util.Integer;
+import com.threerings.util.Log;
+import com.threerings.util.Maps;
+import com.threerings.util.Map;
+import com.threerings.util.Set;
+import com.threerings.util.StringUtil;
+
+public class DataPackTileSetRepository
+    implements TileSetRepository, TileSetIdMap
+{
+    private static var log :Log = Log.getLog(DataPackTileSetRepository);
+
+    public function DataPackTileSetRepository (tileSetUrl :String)
+    {
+        _rootUrl = tileSetUrl;
+        loadTileSetMeta(tileSetUrl + "metadata.jar");
+    }
+
+    protected function loadTileSetMeta (tileSetMetaUrl :String) :void
+    {
+        _metaPack = new TileDataPack(tileSetMetaUrl, metaLoadingComplete);
+    }
+
+    protected function parseTileSetMap (map :String) :void
+    {
+        var lines :Array = map.split("\n");
+        var tileCount :int = int(lines[0]);
+        for (var ii :int = 1; ii < lines.length; ii++) {
+            var line :String = lines[ii];
+            var toks :Array = line.split(" := ");
+            if (toks.length >= 2) {
+                var id :int = int(toks[1]);
+                var name :String = String(toks[0]);
+                _nameMap.put(name, id);
+            }
+        }
+    }
+
+    /**
+     * Handle the successful completion of datapack loading.
+     *
+     * @private
+     */
+    protected function metaLoadingComplete (event :Event) :void
+    {
+        parseTileSetMap(_metaPack.getFileAsString("tilesetmap.txt"));
+
+        for each (var entry :ZipEntry in _metaPack.getFiles()) {
+            var bundleName :String = entry.name;
+            if (StringUtil.endsWith(bundleName, "/bundle.xml")) {
+                loadTileSetsFromPack(bundleName.substr(0, bundleName.length - 11));
+            }
+        }
+
+        // Notify them all and clear our list.
+        for each (var func :Function in _notifyOnLoad) {
+            func();
+        }
+        _notifyOnLoad = [];
+    }
+
+
+    public function notifyOnLoad (func :Function) :void
+    {
+        _notifyOnLoad.push(func);
+    }
+
+    public function enumerateTileSetIds () :Array
+    {
+        return _idMap.keys();
+    }
+
+    public function enumerateTileSets () :Array
+    {
+        return _idMap.values();
+    }
+
+    public function getTileSet (tileSetId :int) :TileSet
+    {
+        var tileSet :TileSet = _idMap.get(tileSetId);
+
+        // We don't have this tileset loaded just yet.... start grabbing the data pack.
+        var packName :String = _packMap.get(tileSetId);
+        if (packName == null) {
+            log.warning("Attempted to load unknown tile set", "tileSetId", tileSetId);
+            throw new NoSuchTileSetError(tileSetId);
+        }
+
+        var pack :TileDataPack = _packs.get(packName);
+
+        if (pack == null || !pack.isComplete()) {
+            loadPack(packName, tileSetId, tileSet);
+
+            // Loading the pack should've put us in the map, so let's go retrieve it...
+            tileSet = _idMap.get(tileSetId);
+        } else {
+            tileSet.setImageProvider(_packs.get(packName));
+        }
+
+        return tileSet;
+    }
+
+    protected function loadPack (packName :String, tileSetId :int, tileSet :TileSet) :void
+    {
+        var pack :TileDataPack = _packs.get(packName);
+
+        if (pack != null && pack.isComplete()) {
+            // Already loaded
+            return;
+        }
+
+        var completeListener :Function = function () :void {
+            tileSet.setImageProvider(_packs.get(packName));
+        };
+
+        var listeners :Array = _packListeners.get(packName);
+        if (listeners == null) {
+            listeners = [];
+            _packListeners.put(packName, listeners);
+
+            var packCompleteListener :Function = function () :void {
+                for each (var listener :Function in listeners) {
+                    listener();
+                }
+                _packListeners.remove(packName);
+            }
+
+            pack = new TileDataPack(getPackUrl(packName), packCompleteListener);
+            _packs.put(packName, pack);
+        }
+
+        listeners.push(completeListener);
+    }
+
+    protected function loadTileSetsFromPack (packName :String) :void
+    {
+        var xml :XML = _metaPack.getFileAsXML(packName + "/bundle.xml");
+        var bundle :TileSetBundle = TileSetBundle.fromXml(xml, this);
+        bundle.forEach(function(key :*, val :*) :void {
+            _idMap.put(key, val);
+            _packMap.put(key, packName);
+        });
+    }
+
+    protected function getPackUrl (packName :String) :String
+    {
+        return _rootUrl + packName + "/bundle.jar";
+    }
+
+    public function getTileSetId (setName :String) :int
+    {
+        return _nameMap.get(setName);
+    }
+
+    public function getTileSetByName (setName :String) :TileSet
+    {
+        return getTileSet(getTileSetId(setName));
+    }
+
+    protected function getPackName (name :String) :String
+    {
+        var lastSlashIdx :int = name.lastIndexOf("/");
+        if (lastSlashIdx == -1) {
+            return name;
+        } else {
+            return name.substring(0, lastSlashIdx).toLowerCase();
+        }
+    }
+
+    public function ensureLoaded (tileSets :Set, completeCallback :Function,
+        progressCallback :Function) :void
+    {
+        var completeCt :int = 0;
+
+        var size :int = tileSets.size();
+
+        // Handles the completion of a single tileset, which if it's our last may call the callback.
+        function completeOneSet () :void {
+            completeCt++;
+
+            progressCallback(completeCt / Number(size));
+
+            if (completeCt >= tileSets.size()) {
+                completeCallback();
+
+                // Ensure we stop making callbacks.
+                completeCallback = null;
+                progressCallback = null;
+            }
+        };
+
+        tileSets.forEach(function (setId :int) :void {
+                var thisSet :TileSet = getTileSet(setId);
+                if (thisSet.isLoaded()) {
+                    completeOneSet();
+                } else {
+                    thisSet.notifyOnLoad(completeOneSet);
+                }
+            });
+    }
+
+    /** Contains the tileset meta-data for all tilesets. */
+    protected var _metaPack : DataPack;
+
+    /** Maps name to tileSetId. */
+    protected var _nameMap :Map = Maps.newMapOf(String);
+
+    /** Maps tileSetId to actual TileSet. */
+    protected var _idMap : Map = Maps.newMapOf(int);
+
+    /** Maps tileSetId to DataPack name. */
+    protected var _packMap :Map = Maps.newMapOf(int);
+
+    /** The URL for our tilesets. */
+    protected var _rootUrl :String;
+
+    /** Map of pack name to listeners waiting for that pack to resolve. */
+    protected var _packListeners :Map = Maps.newMapOf(String);
+
+    /** The map of packs we've already loaded up and resolved. */
+    protected var _packs :Map = Maps.newMapOf(String);
+
+    /** Everyone who cares when we're loaded. */
+    protected var _notifyOnLoad :Array = [];
+}
+}

aslib/src/main/as/com/threerings/media/tile/ImageProvider.as

@@ -0,0 +1,52 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import flash.display.DisplayObject;
+import flash.geom.Rectangle;
+
+public interface ImageProvider
+{
+    /**
+     * Returns the raw tileset image with the specified path.
+     *
+     * @param path the path that identifies the desired image (corresponds to the image path from
+     * the tileset).
+     * @param zations if non-null, colorizations to apply to the source image before returning it.
+     */
+    function getTileSetImage (path :String, zations :Array, callback :Function) :void;
+
+    /**
+     * Obtains the tile image with the specified path in the form of a {@link Mirage}. It should be
+     * cropped from the tileset image identified by the supplied path.
+     *
+     * @param path the path that identifies the desired image (corresponds to the image path from
+     * the tileset).
+     * @param bounds if non-null, the region of the image to be returned as a mirage. If null, the
+     * entire image should be returned.
+     * @param zations if non-null, colorizations to apply to the image before converting it into a
+     * mirage.
+     */
+    function getTileImage (path :String, bounds :Rectangle, zations :Array, callback :Function)
+        :void;
+}
+}

aslib/src/main/as/com/threerings/media/tile/NoSuchTileSetError.as

@@ -0,0 +1,32 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+public class NoSuchTileSetError extends Error
+{
+    public function NoSuchTileSetError (tileSet :*)
+    {
+        super((tileSet is int) ? ("No tile set with id '" + int(tileSet) + "'") :
+            ("No tile set named'" + String(tileSet) + "'"));
+    }
+}
+}

aslib/src/main/as/com/threerings/media/tile/ObjectTile.as

@@ -0,0 +1,212 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import flash.geom.Point;
+
+import com.threerings.media.tile.Tile;
+import com.threerings.util.Arrays;
+import com.threerings.util.DirectionUtil;
+import com.threerings.util.Integer;
+import com.threerings.util.StringUtil;
+
+public class ObjectTile extends Tile
+{
+    /**
+     * Returns the object footprint width in tile units.
+     */
+    public override function getBaseWidth () :int
+    {
+        return _base.x;
+    }
+
+    /**
+     * Returns the object footprint height in tile units.
+     */
+    public override function getBaseHeight () :int
+    {
+        return _base.y;
+    }
+
+    /**
+     * Sets the object footprint in tile units.
+     */
+    public function setBase (width :int, height :int) :void
+    {
+        _base.x = width;
+        _base.y = height;
+    }
+
+    /**
+     * Returns the x offset into the tile image of the origin (which will be aligned with the
+     * bottom center of the origin tile) or <code>Integer.MIN_VALUE</code> if the origin is not
+     * explicitly specified and should be computed from the image size and tile footprint.
+     */
+    public override function getOriginX () :int
+    {
+        return _origin.x;
+    }
+
+    /**
+     * Returns the y offset into the tile image of the origin (which will be aligned with the
+     * bottom center of the origin tile) or <code>Integer.MIN_VALUE</code> if the origin is not
+     * explicitly specified and should be computed from the image size and tile footprint.
+     */
+    public override function getOriginY () :int
+    {
+        return _origin.y;
+    }
+
+    /**
+     * Sets the offset in pixels from the origin of the tile image to the origin of the object.
+     * The object will be rendered such that its origin is at the bottom center of its origin
+     * tile. If no origin is specified, the bottom of the image is aligned with the bottom of the
+     * origin tile and the left side of the image is aligned with the left edge of the left-most
+     * base tile.
+     */
+    public function setOrigin (x :int, y :int) :void
+    {
+        _origin.x = x;
+        _origin.y = y;
+    }
+
+    /**
+     * Returns this object tile's default render priority.
+     */
+    public function getPriority () :int
+    {
+        return _priority;
+    }
+
+    /**
+     * Sets this object tile's default render priority.
+     */
+    public function setPriority (priority :int) :void
+    {
+        _priority = priority;
+    }
+
+    /**
+     * Configures the "spot" associated with this object.
+     */
+    public function setSpot (x :int, y :int, orient :int) :void
+    {
+        _spot = new Point(x, y);
+        _sorient = orient;
+    }
+
+    /**
+     * Returns true if this object has a spot.
+     */
+    public function hasSpot () :Boolean
+    {
+        return (_spot != null);
+    }
+
+    /**
+     * Returns the x-coordinate of the "spot" associated with this object.
+     */
+    public function getSpotX () :int
+    {
+        return (_spot == null) ? 0 : _spot.x;
+    }
+
+    /**
+     * Returns the x-coordinate of the "spot" associated with this object.
+     */
+    public function getSpotY () :int
+    {
+        return (_spot == null) ? 0 : _spot.y;
+    }
+
+    /**
+     * Returns the orientation of the "spot" associated with this object.
+     */
+    public function getSpotOrient () :int
+    {
+        return _sorient;
+    }
+
+    /**
+     * Returns the list of constraints associated with this object, or <code>null</code> if the
+     * object has no constraints.
+     */
+    public function getConstraints () :Array
+    {
+        return _constraints;
+    }
+
+    /**
+     * Checks whether this object has the given constraint.
+     */
+    public function hasConstraint (constraint :String) :Boolean
+    {
+        return (_constraints == null) ? false :
+            Arrays.contains(_constraints, constraint);
+    }
+
+    /**
+     * Configures this object's constraints.
+     */
+    public function setConstraints (constraints :Array) :void
+    {
+        _constraints = constraints;
+    }
+
+    protected override function toStringBuf (buf :String) :String
+    {
+        buf = super.toStringBuf(buf);
+        buf.concat(", base=", StringUtil.toString(_base));
+        buf.concat(", origin=", StringUtil.toString(_origin));
+        buf.concat(", priority=", _priority);
+        if (_spot != null) {
+            buf.concat(", spot=", StringUtil.toString(_spot));
+            buf.concat(", sorient=");
+            buf.concat(DirectionUtil.toShortString(_sorient));
+        }
+        if (_constraints != null) {
+            buf.concat(", constraints=", StringUtil.toString(_constraints));
+        }
+
+        return buf;
+    }
+
+    /** The object footprint width in unit tile units. */
+    protected var _base :Point = new Point(1, 1);
+
+    /** The offset from the origin of the tile image to the object's origin or MIN_VALUE if the
+     * origin should be calculated based on the footprint. */
+    protected var _origin :Point = new Point(Integer.MIN_VALUE, Integer.MIN_VALUE);
+
+    /** This object tile's default render priority. */
+    protected var _priority :int;
+
+    /** The coordinates of the "spot" associated with this object. */
+    protected var _spot :Point;
+
+    /** The orientation of the "spot" associated with this object. */
+    protected var _sorient :int;
+
+    /** The list of constraints associated with this object. */
+    protected var _constraints :Array;
+}
+}

aslib/src/main/as/com/threerings/media/tile/ObjectTileSet.as

@@ -0,0 +1,328 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import com.threerings.util.Arrays;
+import com.threerings.util.StringUtil;
+
+/**
+ * The object tileset supports the specification of object information for object tiles in
+ * addition to all of the features of the swiss army tileset.
+ *
+ * @see ObjectTile
+ */
+public class ObjectTileSet extends SwissArmyTileSet
+    implements RecolorableTileSet
+{
+    /** A constraint prefix indicating that the object must have empty space in
+     * the suffixed direction (N, E, S, or W). */
+    public static const SPACE :String = "SPACE_";
+
+    /** A constraint indicating that the object is a surface (e.g., table). */
+    public static const SURFACE :String = "SURFACE";
+
+    /** A constraint indicating that the object must be placed on a surface. */
+    public static const ON_SURFACE :String = "ON_SURFACE";
+
+    /** A constraint prefix indicating that the object is a wall facing the
+     * suffixed direction (N, E, S, or W). */
+    public static const WALL :String = "WALL_";
+
+    /** A constraint prefix indicating that the object must be placed on a
+     * wall facing the suffixed direction (N, E, S, or W). */
+    public static const ON_WALL :String = "ON_WALL_";
+
+    /** A constraint prefix indicating that the object must be attached to a
+     * wall facing the suffixed direction (N, E, S, or W). */
+    public static const ATTACH :String = "ATTACH_";
+
+    /** The low suffix for walls and attachments. Low attachments can be placed
+     * on low or normal walls; normal attachments can only be placed on normal
+     * walls. */
+    public static const LOW :String = "_LOW";
+
+    /**
+     * Sets the widths (in unit tile count) of the objects in this tileset. This must be
+     * accompanied by a call to {@link #setObjectHeights}.
+     */
+    public function setObjectWidths (objectWidths :Array) :void
+    {
+        _owidths = objectWidths;
+    }
+
+    /**
+     * Sets the heights (in unit tile count) of the objects in this tileset. This must be
+     * accompanied by a call to {@link #setObjectWidths}.
+     */
+    public function setObjectHeights (objectHeights :Array) :void
+    {
+        _oheights = objectHeights;
+    }
+
+    /**
+     * Sets the x offset in pixels to the image origin.
+     */
+    public function setXOrigins (xorigins :Array) :void
+    {
+        _xorigins = xorigins;
+    }
+
+    /**
+     * Sets the y offset in pixels to the image origin.
+     */
+    public function setYOrigins (yorigins :Array) :void
+    {
+        _yorigins = yorigins;
+    }
+
+    /**
+     * Sets the default render priorities for our object tiles.
+     */
+    public function setPriorities (priorities :Array) :void
+    {
+        _priorities = priorities;
+    }
+
+    /**
+     * Provides a set of colorization classes that apply to objects in this tileset.
+     */
+    public function setColorizations (zations :Array) :void
+    {
+        _ozations = zations;
+    }
+
+    /**
+     * Sets the x offset to the "spots" associated with our object tiles.
+     */
+    public function setXSpots (xspots :Array) :void
+    {
+        _xspots = xspots;
+    }
+
+    /**
+     * Sets the y offset to the "spots" associated with our object tiles.
+     */
+    public function setYSpots (yspots :Array) :void
+    {
+        _yspots = yspots;
+    }
+
+    /**
+     * Sets the orientation of the "spots" associated with our object
+     * tiles.
+     */
+    public function setSpotOrients (sorients :Array) :void
+    {
+        _sorients = sorients;
+    }
+
+    /**
+     * Sets the lists of constraints associated with our object tiles.
+     */
+    public function setConstraints (constraints :Array) :void
+    {
+        _constraints = constraints;
+    }
+
+    /**
+     * Returns the x coordinate of the spot associated with the specified tile index.
+     */
+    public function getXSpot (tileIdx :int) :int
+    {
+        return (_xspots == null) ? 0 : _xspots[tileIdx];
+    }
+
+    /**
+     * Returns the y coordinate of the spot associated with the specified tile index.
+     */
+    public function getYSpot (tileIdx :int) :int
+    {
+        return (_yspots == null) ? 0 : _yspots[tileIdx];
+    }
+
+    /**
+     * Returns the orientation of the spot associated with the specified tile index.
+     */
+    public function getSpotOrient (tileIdx :int) :int
+    {
+        return (_sorients == null) ? 0 : _sorients[tileIdx];
+    }
+
+    /**
+     * Returns the list of constraints associated with the specified tile index, or
+     * <code>null</code> if the index has no constraints.
+     */
+    public function getConstraints (tileIdx :int) :Array
+    {
+        return (_constraints == null) ? null : _constraints[tileIdx];
+    }
+
+    /**
+     * Checks whether the tile at the specified index has the given constraint.
+     */
+    public function hasConstraint (tileIdx :int, constraint :String) :Boolean
+    {
+        return (_constraints == null) ? false :
+            Arrays.contains(_constraints[tileIdx], constraint);
+    }
+
+    // documentation inherited from interface RecolorableTileSet
+    public function getColorizations () :Array
+    {
+        return _ozations;
+    }
+
+    override protected function toStringBuf (buf :String) :String
+    {
+        buf = super.toStringBuf(buf);
+        buf = buf.concat(", owidths=", StringUtil.toString(_owidths));
+        buf = buf.concat(", oheights=", StringUtil.toString(_oheights));
+        buf = buf.concat(", xorigins=", StringUtil.toString(_xorigins));
+        buf = buf.concat(", yorigins=", StringUtil.toString(_yorigins));
+        buf = buf.concat(", prios=", StringUtil.toString(_priorities));
+        buf = buf.concat(", zations=", StringUtil.toString(_ozations));
+        buf = buf.concat(", xspots=", StringUtil.toString(_xspots));
+        buf = buf.concat(", yspots=", StringUtil.toString(_yspots));
+        buf = buf.concat(", sorients=", StringUtil.toString(_sorients));
+        buf = buf.concat(", constraints=", StringUtil.toString(_constraints));
+        return buf;
+    }
+
+    override protected function getTileColorizations (tileIndex :int, rizer :Colorizer) :Array
+    {
+        var zations :Array = null;
+        if (rizer != null && _ozations != null) {
+            zations = new Array(_ozations.length);
+            for (var ii :int = 0; ii < _ozations.length; ii++) {
+                zations[ii] = rizer.getColorization(ii, _ozations[ii]);
+            }
+        }
+        return zations;
+    }
+
+    override protected function createTile () :Tile
+    {
+        return new ObjectTile();
+    }
+
+    override protected function initTile (tile :Tile, tileIndex :int, zations :Array) :void
+    {
+        super.initTile(tile, tileIndex, zations);
+
+        var otile :ObjectTile = ObjectTile(tile);
+        if (_owidths != null) {
+            otile.setBase(_owidths[tileIndex], _oheights[tileIndex]);
+        }
+        if (_xorigins != null) {
+            otile.setOrigin(_xorigins[tileIndex], _yorigins[tileIndex]);
+        }
+        if (_priorities != null) {
+            otile.setPriority(_priorities[tileIndex]);
+        }
+        if (_xspots != null) {
+            otile.setSpot(_xspots[tileIndex], _yspots[tileIndex], _sorients[tileIndex]);
+        }
+        if (_constraints != null) {
+            otile.setConstraints(_constraints[tileIndex]);
+        }
+    }
+
+    public static function fromXml (xml :XML) :SwissArmyTileSet
+    {
+        var set :ObjectTileSet = new ObjectTileSet();
+        set.populateFromXml(xml);
+        return set;
+    }
+
+    override protected function populateFromXml (xml :XML) :void
+    {
+        super.populateFromXml(xml);
+        _owidths = toIntArray(xml.objectWidths);
+        _oheights = toIntArray(xml.objectHeights);
+        _xorigins = toIntArray(xml.xOrigins);
+        _yorigins = toIntArray(xml.yOrigins);
+        _priorities = toIntArray(xml.priorities);
+        _ozations = toStrArray(xml.zations);
+        _xspots = toIntArray(xml.xSpots);
+        _yspots = toIntArray(xml.ySpots);
+        _sorients = toIntArray(xml.sorients);
+        var constraintStrArr :Array = toStrArray(xml.constraints);
+        if (constraintStrArr != null) {
+            _constraints =
+                constraintStrArr.map(function(element :*, index :int, arr :Array) :Array {
+                        return element.split("|");
+                });
+        }
+    }
+
+    override public function populateClone (clone :TileSet) :void
+    {
+        super.populateClone(clone);
+        var oClone :ObjectTileSet = ObjectTileSet(clone);
+        oClone._owidths = _owidths == null ? null : Arrays.copyOf(_owidths);
+        oClone._oheights = _oheights == null ? null : Arrays.copyOf(_oheights);
+        oClone._xorigins = _xorigins == null ? null : Arrays.copyOf(_xorigins);
+        oClone._yorigins = _yorigins == null ? null : Arrays.copyOf(_yorigins);
+        oClone._priorities = _priorities == null ? null : Arrays.copyOf(_priorities);
+        oClone._ozations = _ozations == null ? null : Arrays.copyOf(_ozations);
+        oClone._xspots = _xspots == null ? null : Arrays.copyOf(_xspots);
+        oClone._yspots = _yspots == null ? null : Arrays.copyOf(_yspots);
+        oClone._sorients = _sorients == null ? null : Arrays.copyOf(_sorients);
+        oClone._constraints = _constraints == null ? null : Arrays.copyOf(_constraints);
+    }
+
+    override public function createClone () :TileSet
+    {
+        return new ObjectTileSet();
+    }
+
+    /** The width (in tile units) of our object tiles. */
+    protected var _owidths :Array;
+
+    /** The height (in tile units) of our object tiles. */
+    protected var _oheights :Array;
+
+    /** The x offset in pixels to the origin of the tile images. */
+    protected var _xorigins :Array;
+
+    /** The y offset in pixels to the origin of the tile images. */
+    protected var _yorigins :Array;
+
+    /** The default render priorities of our objects. */
+    protected var _priorities :Array;
+
+    /** Colorization classes that apply to our objects. */
+    protected var _ozations :Array;
+
+    /** The x offset to the "spots" associated with our tiles. */
+    protected var _xspots :Array;
+
+    /** The y offset to the "spots" associated with our tiles. */
+    protected var _yspots :Array;
+
+    /** The orientation of the "spots" associated with our tiles. */
+    protected var _sorients :Array;
+
+    /** Lists of constraints associated with our tiles. */
+    protected var _constraints :Array;
+}
+}

aslib/src/main/as/com/threerings/media/tile/RecolorableTileSet.as

@@ -0,0 +1,32 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+public interface RecolorableTileSet
+{
+    /**
+     * Returns the colorization classes that should be used to recolor
+     * objects in this tileset.
+     */
+    function getColorizations () :Array
+}
+}

aslib/src/main/as/com/threerings/media/tile/SwissArmyTileSet.as

@@ -0,0 +1,265 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import com.threerings.util.Arrays;
+import com.threerings.util.StringUtil;
+
+/**
+ * The swiss army tileset supports a diverse variety of tiles in the tileset image. Each row can
+ * contain varying numbers of tiles and each row can have its own width and height. Tiles can be
+ * separated from the edge of the tileset image by some border offset and can be separated from one
+ * another by a gap distance.
+ */
+public class SwissArmyTileSet extends TileSet
+{
+    public override function getTileCount () :int
+    {
+        return _numTiles;
+    }
+
+    public override function computeTileBounds (tileIndex :int) :Rectangle
+    {
+        // find the row number containing the sought-after tile
+        var ridx :int;
+        var tcount :int;
+        var ty :int;
+        var tx :int;
+        ridx = tcount = 0;
+
+        // start tile image position at image start offset
+        tx = _offsetPos.x;
+        ty = _offsetPos.y;
+
+        while ((tcount += _tileCounts[ridx]) < tileIndex + 1) {
+            // increment tile image position by row height and gap distance
+            ty += (_heights[ridx++] + _gapSize.y);
+        }
+
+        // determine the horizontal index of this tile in the row
+        var xidx :int = tileIndex - (tcount - _tileCounts[ridx]);
+
+        // final image x-position is based on tile width and gap distance
+        tx += (xidx * (_widths[ridx] + _gapSize.x));
+
+//         Log.info("Computed tile bounds [tileIndex=" + tileIndex +
+//                  ", ridx=" + ridx + ", xidx=" + xidx + ", tx=" + tx + ", ty=" + ty + "].");
+
+        // crop the tile-sized image chunk from the full image
+        return new Rectangle(tx, ty, _widths[ridx], _heights[ridx]);
+    }
+
+    /**
+     * Sets the tile counts which are the number of tiles in each row of the tileset image. Each
+     * row can have an arbitrary number of tiles.
+     */
+    public function setTileCounts (tileCounts :Array) :void
+    {
+        _tileCounts = tileCounts;
+
+        // compute our total tile count
+        computeTileCount();
+    }
+
+    /**
+     * Returns the tile count settings.
+     */
+    public function getTileCounts () :Array
+    {
+        return _tileCounts;
+    }
+
+    /**
+     * Computes our total tile count from the individual counts for each row.
+     */
+    protected function computeTileCount () :void
+    {
+        // compute our number of tiles
+        _numTiles = 0;
+        for each (var count :int in _tileCounts) {
+            _numTiles += count;
+        }
+    }
+
+    /**
+     * Sets the tile widths for each row. Each row can have tiles of a different width.
+     */
+    public function setWidths (widths :Array) :void
+    {
+        _widths = widths;
+    }
+
+    /**
+     * Returns the width settings.
+     */
+    public function getWidths () :Array
+    {
+        return _widths;
+    }
+
+    /**
+     * Sets the tile heights for each row. Each row can have tiles of a different height.
+     */
+    public function setHeights (heights :Array) :void
+    {
+        _heights = heights;
+    }
+
+    /**
+     * Returns the height settings.
+     */
+    public function getHeights () :Array
+    {
+        return _heights;
+    }
+
+    /**
+     * Sets the offset in pixels of the upper left corner of the first tile in the first row. If
+     * the tileset image has a border, this can be set to account for it.
+     */
+    public function setOffsetPos (offsetPos :Point) :void
+    {
+        _offsetPos = offsetPos;
+    }
+
+    /**
+     * Sets the size of the gap between tiles (in pixels). If the tiles have space between them,
+     * this can be set to account for it.
+     */
+    public function setGapSize (gapSize :Point) :void
+    {
+        _gapSize = gapSize;
+    }
+
+    protected override function toStringBuf (buf :String) :String
+    {
+        buf = super.toStringBuf(buf);
+        buf = buf.concat(", widths=", StringUtil.toString(_widths));
+        buf = buf.concat(", heights=", StringUtil.toString(_heights));
+        buf = buf.concat(", tileCounts=", StringUtil.toString(_tileCounts));
+        buf = buf.concat(", offsetPos=", StringUtil.toString(_offsetPos));
+        buf = buf.concat(", gapSize=", StringUtil.toString(_gapSize));
+        return buf;
+    }
+
+    public static function fromXml (xml :XML) :SwissArmyTileSet
+    {
+        var set :SwissArmyTileSet = new SwissArmyTileSet();
+        set.populateFromXml(xml);
+        return set;
+    }
+
+    protected override function populateFromXml (xml :XML) :void
+    {
+        super.populateFromXml(xml);
+        _tileCounts = toIntArray(xml.tileCounts);
+        _widths = toIntArray(xml.widths);
+        _heights = toIntArray(xml.heights);
+        var offsetPosArr :Array = toIntArray(xml.offsetPos);
+        if (offsetPosArr != null) {
+            _offsetPos = new Point(offsetPosArr[0], offsetPosArr[1]);
+        } else {
+            _offsetPos = new Point(0, 0);
+        }
+        var gapSizeArr :Array = toIntArray(xml.gapSize);
+        if (gapSizeArr != null) {
+            _gapSize = new Point(gapSizeArr[0], gapSizeArr[1]);
+        } else {
+            _gapSize = new Point(0, 0);
+        }
+        computeTileCount();
+    }
+
+    protected static function toStrArray (str :String) :Array
+    {
+        if (str == null || str.length == 0) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :String, index :int, arr :Array) :String {
+                return StringUtil.trim(element);
+            });
+    }
+
+    protected static function toBoolArray (str :String) :Array
+    {
+        if (str == null || str.length == 0) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :*, index :int, arr :Array) :Boolean {
+                return (StringUtil.trim(element) == "1");
+        });
+    }
+
+    protected static function toIntArray (str :String) :Array
+    {
+        if (str == null || str.length == 0) {
+            return null;
+        }
+
+        return str.split(",").map(function(element :*, index :int, arr :Array) :int {
+            return int(StringUtil.trim(element));
+        });
+    }
+
+    override public function populateClone (clone :TileSet) :void
+    {
+        super.populateClone(clone);
+        var saClone :SwissArmyTileSet = SwissArmyTileSet(clone);
+        saClone._tileCounts = _tileCounts == null ? null : Arrays.copyOf(_tileCounts);
+        saClone._numTiles = _numTiles;
+        saClone._widths = _widths == null ? null : Arrays.copyOf(_widths);
+        saClone._heights = _heights == null ? null : Arrays.copyOf(_heights);
+        saClone._offsetPos = _offsetPos;
+        saClone._gapSize = _gapSize;
+    }
+
+    override public function createClone () :TileSet
+    {
+        return new SwissArmyTileSet();
+    }
+
+    /** The number of tiles in each row. */
+    protected var _tileCounts :Array;
+
+    /** The number of tiles in the tileset. */
+    protected var _numTiles :int;
+
+    /** The width of the tiles in each row in pixels. */
+    protected var _widths :Array;
+
+    /** The height of the tiles in each row in pixels. */
+    protected var _heights :Array;
+
+    /** The offset distance (x, y) in pixels from the top-left of the image to the start of the
+     * first tile image.  */
+    protected var _offsetPos :Point = new Point();
+
+    /** The distance (x, y) in pixels between each tile in each row horizontally, and between each
+     * row of tiles vertically.  */
+    protected var _gapSize :Point = new Point();
+}
+}

aslib/src/main/as/com/threerings/media/tile/Tile.as

@@ -0,0 +1,151 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import flash.display.Bitmap;
+import flash.display.BitmapData;
+import flash.display.DisplayObject;
+
+public class Tile
+{
+    /** The key associated with this tile. */
+    public var key :Tile_Key;
+
+    /**
+     * Configures this tile with its tile image.
+     */
+    public function setImage (image :DisplayObject) :void
+    {
+        _image = image;
+
+        // Notify them all and clear our list.
+        for each (var func :Function in _notifyOnLoad) {
+            func(this);
+        }
+    }
+
+    public function getImage () :DisplayObject
+    {
+        if (_image is Bitmap) {
+            // TODO - handle this more consistently...
+            return new Bitmap(Bitmap(_image).bitmapData);
+        } else {
+            return _image;
+        }
+    }
+
+    /**
+     * Returns the width of this tile.
+     */
+    public function getWidth () :int
+    {
+        return _image.width;
+    }
+
+    /**
+     * Returns the height of this tile.
+     */
+    public function getHeight () :int
+    {
+        return _image.height;
+    }
+
+    /**
+     * Returns true if the specified coordinates within this tile contains
+     * a non-transparent pixel.
+     */
+    public function hitTest (x :int, y :int) :Boolean
+    {
+        return _image.hitTestPoint(x, y, true);
+    }
+
+    public function toString () :String
+    {
+        return "[" + toStringBuf(new String()) + "]";
+    }
+
+    /**
+     * This should be overridden by derived classes (which should be sure
+     * to call <code>super.toString()</code>) to append the derived class
+     * specific tile information to the string buffer.
+     */
+    protected function toStringBuf (buf :String) :String
+    {
+        if (_image == null) {
+            return buf.concat("null-image");
+        } else {
+            return buf.concat(_image.width, "x", _image.height);
+        }
+    }
+
+    public function notifyOnLoad (func :Function) :void
+    {
+        if (_image != null) {
+            func(this);
+        } else {
+            _notifyOnLoad.push(func);
+        }
+    }
+
+    /**
+     * Returns the x offset into the tile image of the origin (which will be aligned with the
+     * bottom center of the origin tile) or <code>Integer.MIN_VALUE</code> if the origin is not
+     * explicitly specified and should be computed from the image size and tile footprint.
+     */
+    public function getOriginX () :int
+    {
+        throw new Error("abstract");
+    }
+
+    /**
+     * Returns the y offset into the tile image of the origin (which will be aligned with the
+     * bottom center of the origin tile) or <code>Integer.MIN_VALUE</code> if the origin is not
+     * explicitly specified and should be computed from the image size and tile footprint.
+     */
+    public function getOriginY () :int
+    {
+        throw new Error("abstract")
+    }
+
+    /**
+     * Returns the object footprint width in tile units.
+     */
+    public function getBaseWidth () :int
+    {
+        throw new Error("abstract");
+    }
+
+    /**
+     * Returns the object footprint height in tile units.
+     */
+    public function getBaseHeight () :int
+    {
+        throw new Error("abstract");
+    }
+
+    /** Our tileset image. */
+    protected var _image :DisplayObject;
+
+    /** Everyone who cares when we're loaded. */
+    protected var _notifyOnLoad :Array = [];
+}
+}

aslib/src/main/as/com/threerings/media/tile/TileDataPack.as

@@ -0,0 +1,129 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import flash.display.Bitmap;
+import flash.display.BitmapData;
+import flash.display.DisplayObject;
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import flash.events.Event;
+
+import flash.utils.ByteArray;
+
+import nochump.util.zip.ZipEntry;
+import nochump.util.zip.ZipError;
+import nochump.util.zip.ZipFile;
+
+import com.threerings.media.image.PngRecolorUtil;
+import com.threerings.util.DataPack;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.util.MultiLoader;
+import com.threerings.util.StringUtil;
+
+/**
+ * Like a normal data pack, but we don't deal with any data, and all our filenames are a direct
+ *  translation, so we need no metadata file.  We also serve as a tile ImageProvider.
+ */
+public class TileDataPack extends DataPack
+    implements ImageProvider
+{
+    public function TileDataPack (
+        source :Object, completeListener :Function = null, errorListener :Function = null)
+    {
+        super(source, completeListener, errorListener);
+    }
+
+    protected override function bytesAvailable (bytes :ByteArray) :void
+    {
+        bytes.position = 0;
+        try {
+            _zip = new ZipFile(bytes);
+        } catch (zipError :ZipError) {
+            dispatchError("Unable to read datapack: " + zipError.message);
+            return;
+        }
+
+        // Put something there so we know we're loaded.
+        _metadata = <xml></xml>;
+
+        // yay, we're completely loaded!
+        dispatchEvent(new Event(Event.COMPLETE));
+    }
+
+    /**
+     * We have no metadata, so everything is undefined.
+     */
+    public override function getData (name :String, formatType :String = null) :*
+    {
+        return undefined;
+    }
+
+    /**
+     * We have no XML metadata, so our filename is exactly the original name.
+     */
+    protected override function getFileName (name :String) :String
+    {
+        return name;
+    }
+
+    public function getTileSetImage (path :String, zations :Array, callback :Function) :void
+    {
+        var key :String = zations == null ? path : path + ":" + StringUtil.toString(zations);
+
+        if (_cache.containsKey(key)) {
+            callback(_cache.get(key));
+        } else if (_pending.containsKey(key)) {
+            _pending.get(key).push(callback);
+        } else {
+            _pending.put(key, [callback]);
+            MultiLoader.getContents(PngRecolorUtil.recolorPNG(getFile(path), zations),
+                function(result :Bitmap) :void {
+                    _cache.put(key, result);
+                    for each (var func :Function in _pending.remove(key)) {
+                        func(result);
+                    }
+                });
+        }
+    }
+
+    public function getTileImage (path :String, bounds :Rectangle, zations :Array,
+        callback :Function) :void
+    {
+        getTileSetImage(path, zations, function(result :Bitmap) :void {
+            var data :BitmapData =
+                new BitmapData(bounds.width, bounds.height, true, 0x00000000);
+            data.copyPixels(Bitmap(result).bitmapData, bounds, new Point(0, 0));
+            callback(new Bitmap(data));
+        });
+    }
+
+    /** Cache of images loaded from this data pack. */
+    protected var _cache :Map = Maps.newMapOf(String);
+
+    /** Any images we're in the process of resolving, map their key to a list of listeners*/
+    protected var _pending :Map = Maps.newMapOf(String);
+}
+}

aslib/src/main/as/com/threerings/media/tile/TileManager.as

@@ -0,0 +1,147 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import com.threerings.util.Log;
+import com.threerings.util.Set;
+
+/**
+ * The tile manager provides a simplified interface for retrieving and caching tiles. Tiles can be
+ * loaded in two different ways. An application can load a tileset by hand, specifying the path to
+ * the tileset image and all of the tileset metadata necessary for extracting the image tiles, or
+ * it can provide a tileset repository which loads up tilesets using whatever repository mechanism
+ * is implemented by the supplied repository. In the latter case, tilesets are loaded by a unique
+ * identifier.
+ *
+ * <p> Loading tilesets by hand is intended for things like toolbar icons or games with a single
+ * set of tiles (think Stratego, for example). Loading tilesets from a repository supports games
+ * with vast numbers of tiles to which more tiles may be added on the fly (think the tiles for an
+ * isometric-display graphical MUD).
+ */
+public class TileManager
+{
+    private static var log :Log = Log.getLog(TileManager);
+
+    /**
+     * Sets the tileset repository that will be used by the tile manager when tiles are requested
+     * by tileset id.
+     */
+    public function setTileSetRepository (setrep :TileSetRepository) :void
+    {
+        _setrep = setrep;
+    }
+
+    /**
+     * Returns the tileset repository currently in use.
+     */
+    public function getTileSetRepository () :TileSetRepository
+    {
+        return _setrep;
+    }
+
+    /**
+     * Returns the tileset with the specified id. Tilesets are fetched from the tileset repository
+     * supplied via {@link #setTileSetRepository}, and are subsequently cached.
+     *
+     * @param tileSetId the unique identifier for the desired tileset.
+     *
+     * @exception NoSuchTileSetError thrown if no tileset exists with the specified id or if
+     * an underlying error occurs with the tileset repository's persistence mechanism.
+     */
+    public function getTileSet (tileSetId :int) :TileSet
+    {
+        // make sure we have a repository configured
+        if (_setrep == null) {
+            throw new NoSuchTileSetError(tileSetId);
+        }
+
+        try {
+            return _setrep.getTileSet(tileSetId);
+        } catch (pe :Error) {
+            log.warning("Failure loading tileset", "id", tileSetId, pe);
+            throw new NoSuchTileSetError(tileSetId);
+        }
+
+        // Unreachable.
+        return null;
+    }
+
+    /**
+     * Returns the tileset with the specified name.
+     *
+     * @throws NoSuchTileSetError if no tileset with the specified name is available via our
+     * configured tile set repository.
+     */
+    public function getTileSetByName (name :String) :TileSet
+    {
+        // make sure we have a repository configured
+        if (_setrep == null) {
+            throw new NoSuchTileSetError(name);
+        }
+
+        try {
+            return _setrep.getTileSetByName(name);
+        } catch (pe :Error) {
+            log.warning("Failure loading tileset", "name", name, "error", pe);
+            throw new NoSuchTileSetError(name);
+        }
+
+        // Unreachable.
+        return null;
+    }
+
+    /**
+     * Returns the {@link Tile} object with the specified fully qualified tile id. The supplied
+     * colorizer will be used to recolor the tile.
+     *
+     * @see TileUtil#getFQTileId
+     */
+    public function getTile (fqTileId :int, rizer :Colorizer = null) :Tile
+    {
+        return getTileBySet(TileUtil.getTileSetId(fqTileId),
+            TileUtil.getTileIndex(fqTileId), rizer);
+    }
+
+    /**
+     * Returns the {@link Tile} object from the specified tileset at the specified index.
+     *
+     * @param tileSetId the tileset id.
+     * @param tileIndex the index of the tile to be retrieved.
+     *
+     * @return the tile object.
+     */
+    public function getTileBySet (tileSetId :int, tileIndex :int, rizer :Colorizer) :Tile
+    {
+        var set :TileSet = getTileSet(tileSetId);
+        return set.getTile(tileIndex, rizer);
+    }
+
+    public function ensureLoaded (tileSets :Set, completeCallback :Function,
+        progressCallback :Function) :void
+    {
+        _setrep.ensureLoaded(tileSets, completeCallback, progressCallback);
+    }
+
+    /** The tile set repository. */
+    protected var _setrep :TileSetRepository;
+}
+}

aslib/src/main/as/com/threerings/media/tile/TileSet.as

@@ -0,0 +1,401 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import flash.display.Bitmap;
+import flash.display.DisplayObject;
+import flash.geom.Rectangle;
+
+import com.threerings.display.ImageUtil;
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.ObjectOutputStream;
+import com.threerings.io.Streamable;
+import com.threerings.media.image.Colorization;
+import com.threerings.util.Cloneable;
+import com.threerings.util.Hashable;
+import com.threerings.util.Log;
+import com.threerings.util.StringUtil;
+import com.threerings.util.Throttle;
+import com.threerings.util.maps.HashMap;
+import com.threerings.util.maps.WeakValueMap;
+
+public /* abstract */ class TileSet
+    implements Streamable, Hashable, Cloneable
+{
+    private static var log :Log = Log.getLog(TileSet);
+
+    public function readObject (oin :ObjectInputStream) :void
+    {
+        _imagePath = oin.readUTF();
+        _name = oin.readUTF();
+    }
+
+    public function writeObject (oout :ObjectOutputStream) :void
+    {
+        oout.writeUTF(_imagePath);
+        oout.writeUTF(_name);
+    }
+
+    /**
+     * Configures this tileset with an image provider that it can use to load its tileset image.
+     * This will be called automatically when the tileset is fetched via the {@link TileManager}.
+     */
+    public function setImageProvider (improv :ImageProvider) :void
+    {
+        _improv = improv;
+
+        if (_improv != null) {
+            for each (var arr :Array in _pending) {
+                initTile(arr[0], arr[1], arr[2]);
+            }
+        }
+        _pending = [];
+
+        loaded();
+    }
+
+    /**
+     * Returns the tileset name.
+     */
+    public function getName () :String
+    {
+        return (_name == null) ? _imagePath : _name;
+    }
+
+    /**
+     * Specifies the tileset name.
+     */
+    public function setName (name :String) :void
+    {
+        _name = name;
+    }
+
+    public function hashCode () :int
+    {
+        return StringUtil.hashCode(getName());
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        return other === this;
+    }
+
+    /**
+     * Sets the path to the image that will be used by this tileset. This must be called before the
+     * first call to {@link #getTile}.
+     */
+    public function setImagePath (imagePath :String) :void
+    {
+        _imagePath = imagePath;
+    }
+
+    /**
+     * Returns the path to the composite image used by this tileset.
+     */
+    public function getImagePath () :String
+    {
+        return _imagePath;
+    }
+
+    /**
+     * Returns the number of tiles in the tileset.
+     */
+    public function getTileCount () :int
+    {
+        throw new Error("abstract");
+    }
+
+    /**
+     * Computes and fills in the bounds for the specified tile based on the mechanism used by the
+     * derived class to do such things. The width and height of the bounds should be the size of
+     * the tile image and the x and y offset should be the offset in the tileset image for the
+     * image data of the specified tile.
+     *
+     * @param tileIndex the index of the tile whose bounds are to be computed.
+     * @param bounds the rectangle object into which to fill the bounds.
+     *
+     * @return the rectangle passed into the bounds parameter.
+     */
+    public function computeTileBounds (tileIndex :int) :Rectangle
+    {
+        throw new Error("abstract");
+    }
+
+    /**
+     * Creates a {@link Tile} object from this tileset corresponding to the specified tile id and
+     * returns that tile. A null tile will never be returned, but one with an error image may be
+     * returned if a problem occurs loading the underlying tileset image.
+     *
+     * @param tileIndex the index of the tile in the tileset. Tile indexes start with zero as the
+     * upper left tile and increase by one as the tiles move left to right and top to bottom over
+     * the source image.
+     * @param zations colorizations to be applied to the tile image prior to returning it. These
+     * may be null for uncolorized images.
+     *
+     * @return the tile object.
+     */
+    public function getTile (tileIndex :int, zations :* = null) :Tile
+    {
+        // Default to using our default tileset colorizations.
+        if (zations == null) {
+            zations = _zations;
+        } else if (zations is Colorizer) {
+            zations = getTileColorizations(tileIndex, zations);
+        }
+
+        var tile :Tile = null;
+
+        // first look in the active set; if it's in use by anyone or in the cache, it will be in
+        // the active set
+        var key :Tile_Key = new Tile_Key(this, tileIndex, zations);
+        tile = _atiles.get(key);
+
+        // if it's not in the active set, it's not in memory; so load it
+        if (tile == null) {
+            tile = createTile();
+            tile.key = key;
+            initTile(tile, tileIndex, zations);
+            _atiles.put(tile.key, tile);
+        }
+
+        // periodically report our image cache performance
+        reportCachePerformance();
+
+        return tile;
+    }
+
+    /**
+     * Returns a prepared version of the image that would be used by the tile at the specified
+     * index. Because tilesets are often used simply to provide access to a collection of uniform
+     * images, this method is provided to bypass the creation of a {@link Tile} object when all
+     * that is desired is access to the underlying image.
+     */
+    public function getTileImage (tileIndex :int, zations :Array, callback :Function)
+        :void
+    {
+        // If they weren't specified, get the default zations for this tile.
+        if (zations == null) {
+            zations = getTileColorizations(tileIndex, null);
+        }
+
+        var bounds :Rectangle = computeTileBounds(tileIndex);
+        var image :DisplayObject = null;
+        if (checkTileIndex(tileIndex)) {
+            if (_improv == null) {
+                log.warning("Aiya! Tile set missing image provider [path=" + _imagePath + "].");
+                callback(new Bitmap(ImageUtil.createErrorBitmap()));
+
+            } else {
+                _improv.getTileImage(_imagePath, bounds, zations,
+                    function(result :DisplayObject) :void {
+                        if (result == null) {
+                            result = new Bitmap(ImageUtil.createErrorBitmap());
+                        }
+                        callback(result);
+                    });
+            }
+        } else {
+            callback(ImageUtil.createErrorImage(bounds.width, bounds.height));
+        }
+    }
+
+    /**
+     * Returns colorizations for the specified tile image. The default is to return any
+     * colorizations associated with the tileset via a call to {@link #clone(Colorization[])},
+     * however derived classes may have dynamic colorization policies that look up colorization
+     * assignments from the supplied colorizer.
+     */
+    protected function getTileColorizations (tileIndex :int, rizer :Colorizer) :Array
+    {
+        return _zations;
+    }
+
+    /**
+     * Used to ensure that the specified tile index is valid.
+     */
+    protected function checkTileIndex (tileIndex :int) :Boolean
+    {
+        var tcount :int = getTileCount();
+        if (tileIndex >= 0 && tileIndex < tcount) {
+            return true;
+        } else {
+            log.warning("Requested invalid tile [tset=" + this + ", index=" + tileIndex + "].",
+  new Error());
+            return false;
+        }
+    }
+
+    /**
+     * Creates a blank tile of the appropriate type for this tileset.
+     *
+     * @return a blank tile ready to be populated with its image and metadata.
+     */
+    protected function createTile () :Tile
+    {
+        return new Tile();
+    }
+
+    /**
+     * Initializes the supplied tile. Derived classes can override this method to add
+     * in their own tile information, but should be sure to call <code>super.initTile()</code>.
+     *
+     * @param tile the tile to initialize.
+     * @param tileIndex the index of the tile.
+     * @param zations the colorizations to be used when generating the tile image.
+     */
+    protected function initTile (tile :Tile, tileIndex :int, zations :Array) :void
+    {
+        if (_improv != null) {
+            getTileImage(tileIndex, zations, function(result :DisplayObject) :void {
+                tile.setImage(result);
+            });
+        } else {
+            _pending.push([tile, tileIndex, zations]);
+        }
+    }
+
+    /**
+     * Reports statistics detailing the image manager cache performance and the current size of the
+     * cached images.
+     */
+    protected function reportCachePerformance () :void
+    {
+        if (_improv == null ||
+            _cacheStatThrottle.throttleOp()) {
+            return;
+        }
+
+        // compute our estimated memory usage
+        var amem :int = 0;
+        var asize :int = 0;
+        // first total up the active tiles
+        for each (var tile :Tile in _atiles.values()) {
+            if (tile != null) {
+                asize++;
+            }
+        }
+        log.info("Tile caches [seen=" + _atiles.size() + ", asize=" + asize + "].");
+    }
+
+    public function toString () :String
+    {
+        return "[" + toStringBuf(new String()) + "]";
+    }
+
+    /**
+     * Derived classes can override this, calling <code>super.toString(buf)</code> and then
+     * appending additional information to the buffer.
+     */
+    protected function toStringBuf (buf :String) :String
+    {
+        buf = buf.concat("name=", _name);
+        buf = buf.concat(", path=", _imagePath);
+        buf = buf.concat(", tileCount=", getTileCount());
+        return buf;
+    }
+
+    public function isLoaded () :Boolean
+    {
+        return _isLoaded;
+    }
+
+    public function loaded () :void
+    {
+        _isLoaded = true;
+
+        // Notify them all and clear our list.
+        for each (var func :Function in _notifyOnLoad) {
+            func(this);
+        }
+        _notifyOnLoad = [];
+    }
+
+    public function notifyOnLoad (func :Function) :void
+    {
+        if (isLoaded()) {
+            func(this);
+        } else {
+            _notifyOnLoad.push(func);
+        }
+    }
+
+    protected function populateFromXml (xml :XML) :void
+    {
+        _name = xml.@name;
+        _imagePath = xml.imagePath;
+    }
+
+    public function clone () :Object
+    {
+        var newSet :TileSet = createClone();
+        populateClone(newSet);
+        return newSet;
+    }
+
+    public function populateClone (clone :TileSet) :void
+    {
+        clone._isLoaded = _isLoaded;
+        clone._imagePath = _imagePath;
+        clone._name = _name;
+        clone._improv = _improv;
+    }
+
+    public function createClone () :TileSet
+    {
+        return new TileSet();
+    }
+
+    public function cloneWithZations (zations :Array) :TileSet
+    {
+        var newSet :TileSet = TileSet(clone());
+        newSet._zations = zations;
+        return newSet;
+    }
+
+    /** Whether all the media for this tileset is loaded and ready. */
+    protected var _isLoaded :Boolean;
+
+    /** The path to the file containing the tile images. */
+    protected var _imagePath :String;
+
+    /** The tileset name. */
+    protected var _name :String;
+
+    /** Colorizations to be applied to tiles created from this tileset. */
+    protected var _zations :Array; /* of */ Colorization;
+
+    /** The entity from which we obtain our tile image. */
+    protected var _improv :ImageProvider;
+
+    /** Everyone who cares when we're loaded. */
+    protected var _notifyOnLoad :Array = [];
+
+    /** Tiles awaiting an image provider. */
+    protected var _pending :Array = [];
+
+    /** A map containing weak references to all "active" tiles. */
+    protected static var _atiles :WeakValueMap = new WeakValueMap(new HashMap());
+
+    /** Throttle our cache status logging to once every 300 seconds. */
+    protected static var _cacheStatThrottle :Throttle = new Throttle(1, 300000);
+}
+}

aslib/src/main/as/com/threerings/media/tile/TileSetIdMap.as

@@ -0,0 +1,31 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+public interface TileSetIdMap
+{
+    /**
+     * Returns the unique identifier for the named tileset.
+     */
+    function getTileSetId (tileSetName :String) :int
+}
+}

aslib/src/main/as/com/threerings/media/tile/TileSetRepository.as

@@ -0,0 +1,80 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import com.threerings.util.Set;
+
+public interface TileSetRepository {
+
+    /**
+     * Returns an iterator over the identifiers of all {@link TileSet}
+     * objects available.
+     */
+    function enumerateTileSetIds () :Array;
+
+    /**
+     * Returns an iterator over all {@link TileSet} objects available.
+     */
+    function enumerateTileSets () :Array;
+
+    /**
+     * Returns the {@link TileSet} with the specified tile set
+     * identifier. The repository is responsible for configuring the tile
+     * set with an image provider.
+     *
+     * @exception NoSuchTileSetException thrown if no tileset exists with
+     * the specified identifier.
+     * @exception PersistenceException thrown if an error occurs
+     * communicating with the underlying persistence mechanism.
+     */
+    function getTileSet (tileSetId :int) :TileSet;
+
+    /**
+     * Returns the unique identifier of the {@link TileSet} with the
+     * specified tile set name.
+     *
+     * @exception NoSuchTileSetException thrown if no tileset exists with
+     * the specified name.
+     * @exception PersistenceException thrown if an error occurs
+     * communicating with the underlying persistence mechanism.
+     */
+    function getTileSetId (setName :String) :int;
+
+    /**
+     * Returns the {@link TileSet} with the specified tile set name. The
+     * repository is responsible for configuring the tile set with an
+     * image provider.
+     *
+     * @exception NoSuchTileSetException thrown if no tileset exists with
+     * the specified name.
+     * @exception PersistenceException thrown if an error occurs
+     * communicating with the underlying persistence mechanism.
+     */
+    function getTileSetByName (setName :String) :TileSet;
+
+    /**
+     * Ensures we are ready with quick-access to all the specified tilesets.
+     */
+    function ensureLoaded (tileSets :Set, completeCallback :Function,
+        progressCallback :Function) :void;
+}
+}

aslib/src/main/as/com/threerings/media/tile/TileUtil.as

@@ -0,0 +1,70 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+public class TileUtil
+{
+    /**
+     * Generates a fully-qualified tile id given the supplied tileset id
+     * and tile index.
+     */
+    public static function getFQTileId (tileSetId :int, tileIndex :int) :int
+    {
+        return (tileSetId << 16) | tileIndex;
+    }
+
+    /**
+     * Extracts the tile set id from the supplied fully qualified tile id.
+     */
+    public static function getTileSetId (fqTileId :int) :int
+    {
+        return (fqTileId >> 16);
+    }
+
+    /**
+     * Extracts the tile index from the supplied fully qualified tile id.
+     */
+    public static function getTileIndex (fqTileId :int) :int
+    {
+        return (fqTileId & 0xFFFF);
+    }
+
+    /**
+     * Compute some hash value for "randomizing" tileset picks
+     * based on x and y coordinates.
+     * NOTE: Because actionscript doesn't handle longs well, this does NOT match the implementation
+     *  of the java version of getTileHash()
+     *
+     * @return a positive, seemingly random number based on x and y.
+     */
+    public static function getTileHash (x :int, y :int) :int
+    {
+        var seed :int = (((x << 2) ^ y) ^ MULTIPLIER) & MASK;
+        var hash :int = (seed * MULTIPLIER + ADDEND) & MASK;
+        return hash >>> 10;
+    }
+
+    protected static const MULTIPLIER :int = 0x5E66D;
+    protected static const ADDEND :int = 0xB;
+    protected static const MASK :int = (1 << 16) - 1;
+}
+}

aslib/src/main/as/com/threerings/media/tile/Tile_Key.as

@@ -0,0 +1,67 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile {
+
+import com.threerings.media.image.Colorization;
+import com.threerings.util.Arrays;
+import com.threerings.util.Hashable;
+
+/** Used when caching tiles. */
+public class Tile_Key
+    implements Hashable
+{
+    public var tileSet :TileSet;
+    public var tileIndex :int;
+    public var zations :Array;
+
+    public function Tile_Key (tileSet :TileSet, tileIndex :int, zations :Array) {
+        this.tileSet = tileSet;
+        this.tileIndex = tileIndex;
+        this.zations = zations;
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        if (other is Tile_Key) {
+            var okey :Tile_Key = Tile_Key(other);
+            return (tileSet == okey.tileSet &&
+                    tileIndex == okey.tileIndex &&
+                    Arrays.equals(zations, okey.zations));
+        } else {
+            return false;
+        }
+    }
+
+    public function hashCode () :int
+    {
+        var code :int = (tileSet == null) ? tileIndex :
+            (tileSet.hashCode() ^ tileIndex);
+        var zcount :int = (zations == null) ? 0 : zations.length;
+        for each (var zation :Colorization in zations) {
+            if (zation != null) {
+                code ^= zation.hashCode();
+            }
+        }
+        return code;
+    }
+}
+}

aslib/src/main/as/com/threerings/media/tile/bundle/TileSetBundle.as

@@ -0,0 +1,73 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.tile.bundle {
+
+import flash.display.DisplayObject;
+
+import com.threerings.io.ObjectOutputStream;
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.Streamable;
+import com.threerings.util.DataPack;
+import com.threerings.util.maps.DictionaryMap;
+import com.threerings.media.tile.BaseTileSet;
+import com.threerings.media.tile.ObjectTileSet;
+import com.threerings.media.tile.SwissArmyTileSet;
+import com.threerings.media.tile.TileSet;
+import com.threerings.media.tile.TileSetIdMap;
+
+public class TileSetBundle extends DictionaryMap
+{
+    public function init (pack :DataPack) :void
+    {
+        _pack = pack;
+    }
+
+    public static function fromXml (xml :XML, idMap :TileSetIdMap) :TileSetBundle
+    {
+        var bundle :TileSetBundle = new TileSetBundle();
+        for each (var objXml :XML in xml.object.tileset) {
+            var objId :int = idMap.getTileSetId(objXml.@name);
+            bundle.put(objId, ObjectTileSet.fromXml(objXml));
+        }
+        for each (var baseXml :XML in xml.base.tileset) {
+            var baseId :int = idMap.getTileSetId(baseXml.@name);
+            bundle.put(baseId, BaseTileSet.fromXml(baseXml));
+        }
+        for each (var fringeXml :XML in xml.fringe.tileset) {
+            var fringeId :int = idMap.getTileSetId(fringeXml.@name);
+            bundle.put(fringeId, SwissArmyTileSet.fromXml(fringeXml));
+        }
+        return bundle;
+    }
+
+    /**
+     * Loads the image from our data pack.
+     */
+    public function loadImage (path :String) :DisplayObject
+    {
+        return DisplayObject(_pack.getFile(path));
+    }
+
+    /** The data pack from which we can grab images. */
+    protected var _pack :DataPack;
+}
+}

aslib/src/main/as/com/threerings/media/util/AStarPathSearch.as

@@ -0,0 +1,133 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+import com.threerings.util.MathUtil;
+
+/**
+ * Searches for the shortest traversable path between locations.
+ */
+public class AStarPathSearch
+{
+    /**
+     * Creates a searching object using tpred to check for traversability and stepper to find
+     *  all the valid adjacent spots and the stepping costs & estimates.
+     */
+    public function AStarPathSearch (tpred :TraversalPred,
+        stepper :AStarPathSearch_Stepper = null)
+    {
+        _tpred = tpred;
+
+        if (stepper == null) {
+            _stepper = new AStarPathSearch_Stepper();
+        } else {
+            _stepper = stepper;
+        }
+    }
+
+        /**
+     * Return a list of <code>Point</code> objects representing a path from coordinates
+     * <code>(ax, by)</code> to <code>(bx, by)</code>, inclusive, determined by performing an
+     * A* search in the given scene's base tile layer. Assumes the starting and destination nodes
+     * are traversable by the specified traverser.
+     *
+     * @param trav the traverser to follow the path.
+     * @param longest the longest allowable path in tile traversals. This arg must be small enough
+     *        that _stepper.getMaxCost(longest) < Integer.MAX_VALUE
+     * @param ax the starting x-position in tile coordinates.
+     * @param ay the starting y-position in tile coordinates.
+     * @param bx the ending x-position in tile coordinates.
+     * @param by the ending y-position in tile coordinates.
+     * @param partial if true, a partial path will be returned that gets us as close as we can to
+     * the goal in the event that a complete path cannot be located.
+     *
+     * @return the list of points in the path, or null if no path could be found.
+     */
+    public function getPath (trav :Object, longest :int, ax :int, ay :int, bx :int, by :int,
+                             partial :Boolean) :Array
+    {
+        var info :AStarPathSearch_Info = new AStarPathSearch_Info(_tpred, trav,
+            _stepper.getMaxCost(longest), bx, by);
+
+        // set up the starting node
+        var s :AStarPathSearch_Node = info.getNode(ax, ay);
+        s.g = 0;
+        s.h = _stepper.getDistanceEstimate(ax, ay, bx, by);
+        s.f = s.g + s.h;
+
+        // push starting node on the open list
+        info.open.add(s);
+
+        // track the best path
+        var bestdist :Number = Number.POSITIVE_INFINITY;
+        var bestpath :AStarPathSearch_Node = null;
+
+        // while there are more nodes on the open list
+        while (info.open.size() > 0) {
+            // pop the best node so far from open
+            var n :AStarPathSearch_Node = null;
+
+            info.open.forEach(function (val :AStarPathSearch_Node) :Boolean {
+                n = val;
+                return true;
+            });
+            info.open.remove(n);
+
+            // if node is a goal node
+            if (n.x == bx && n.y == by) {
+                // construct and return the acceptable path
+                return n.getNodePath();
+
+            } else if (partial) {
+                var pathdist :Number = MathUtil.distance(n.x, n.y, bx, by);
+                if (pathdist < bestdist) {
+                    bestdist = pathdist;
+                    bestpath = n;
+                }
+            }
+
+            // consider each successor of the node
+            _stepper.considerSteps(info, n, n.x, n.y);
+
+            // push the node on the closed list
+            info.closed.add(n);
+        }
+
+        // return the best path we could find if we were asked to do so
+        if (bestpath != null) {
+            return bestpath.getNodePath();
+        }
+
+        // no path found
+        return null;
+    }
+
+
+
+    /** In charge of determining if we can walk across various bits. */
+    protected var _tpred :TraversalPred;
+
+    /** In charge of finding all the steps from a given spot. */
+    protected var _stepper :AStarPathSearch_Stepper;
+}
+}
+

aslib/src/main/as/com/threerings/media/util/AStarPathSearch_Info.as

@@ -0,0 +1,180 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+import com.threerings.util.Maps;
+
+import com.threerings.util.Map;
+import com.threerings.util.Set;
+import com.threerings.util.Sets;
+
+/**
+ * A holding class to contain the wealth of information referenced
+ * while performing an A* search for a path through a tile array.
+ */
+public class AStarPathSearch_Info
+{
+    /** Knows whether or not tiles are traversable. */
+    public var tpred :TraversalPred;
+
+    /** The tile array dimensions. */
+    public var tilewid :int;
+    public var tilehei :int;
+
+    /** The traverser moving along the path. */
+    public var trav :Object;
+
+    /** The set of open nodes being searched. */
+    // TODO - This would benefit from a more efficient implementation of SortedSet, but for now
+    //  it is good enough.
+    public var open :Set;
+
+    /** The set of closed nodes being searched. */
+    public var closed :Set;
+
+    /** The destination coordinates in the tile array. */
+    public var destx :int;
+    public var desty :int;
+
+    /** The maximum cost of any path that we'll consider. */
+    public var maxcost :int;
+
+    public function AStarPathSearch_Info (tpred :TraversalPred, trav :Object, maxcost :int,
+        destx :int, desty :int)
+    {
+        // save off references
+        this.tpred = tpred;
+        this.trav = trav;
+        this.destx = destx;
+        this.desty = desty;
+
+        // compute our maximum path cost
+        this.maxcost = maxcost;
+
+        // construct the open and closed lists
+        open = Sets.newSortedSetOf(AStarPathSearch_Node);
+        closed = Sets.newSetOf(AStarPathSearch_Node);
+    }
+
+    /**
+     * Returns whether moving from the given source to destination coordinates is a valid
+     * move.
+     */
+    protected function isStepValid (sx :int, sy :int, dx :int, dy :int) :Boolean
+    {
+        // not traversable if the destination itself fails test
+        if (tpred is ExtendedTraversalPred) {
+            if (!ExtendedTraversalPred(tpred).canTraverseBetween(trav, sx, sy, dx, dy)) {
+                return false;
+            }
+        } else if (!isTraversable(dx, dy)) {
+            return false;
+        }
+
+        // if the step is diagonal, make sure the corners don't impede our progress
+        if ((Math.abs(dx - sx) == 1) && (Math.abs(dy - sy) == 1)) {
+            return isTraversable(dx, sy) && isTraversable(sx, dy);
+        }
+
+        // non-diagonals are always traversable
+        return true;
+    }
+
+    /**
+     * Returns whether the given coordinate is valid and traversable.
+     */
+    protected function isTraversable (x :int, y :int) :Boolean
+    {
+        return tpred.canTraverse(trav, x, y);
+    }
+
+    /**
+     * Get or create the node for the specified point.
+     */
+    public function getNode (x :int, y :int) :AStarPathSearch_Node
+    {
+        // note: this _could_ break for unusual values of x and y.
+        // perhaps use a IntTuple as a key? Bleah.
+        var key :int = (x << 16) | (y & 0xffff);
+        var node :AStarPathSearch_Node = _nodes.get(key);
+        if (node == null) {
+            node = new AStarPathSearch_Node(x, y);
+            _nodes.put(key, node);
+        }
+        return node;
+    }
+
+    /**
+     * Consider the step <code>(n.x, n.y)</code> to <code>(x, y)</code> for possible inclusion
+     * in the path.
+     *
+     * @param info the info object.
+     * @param node the originating node for the step.
+     * @param x the x-coordinate for the destination step.
+     * @param y the y-coordinate for the destination step.
+     */
+    public function considerStep (node :AStarPathSearch_Node, x :int, y :int, cost :int,
+        stepper :AStarPathSearch_Stepper) :void
+    {
+        // skip node if it's outside the map bounds or otherwise impassable
+        if (!isStepValid(node.x, node.y, x, y)) {
+            return;
+        }
+
+        // calculate the new cost for this node
+        var newg :int = node.g + cost;
+
+        // make sure the cost is reasonable
+        if (newg > maxcost) {
+            return;
+        }
+
+        // retrieve the node corresponding to this location
+        var np :AStarPathSearch_Node = getNode(x, y);
+
+        // skip if it's already in the open or closed list or if its
+        // actual cost is less than the just-calculated cost
+        if ((open.contains(np) || closed.contains(np)) && np.g <= newg) {
+            return;
+        }
+
+        // remove the node from the open list since we're about to
+        // modify its score which determines its placement in the list
+        open.remove(np);
+
+        // update the node's information
+        np.parent = node;
+        np.g = newg;
+        np.h = stepper.getDistanceEstimate(np.x, np.y, destx, desty);
+        np.f = np.g + np.h;
+
+        // remove it from the closed list if it's present
+        closed.remove(np);
+
+        // add it to the open list for further consideration
+        open.add(np);
+    }
+
+    /** The nodes being considered in the path. */
+    protected var _nodes :Map = Maps.newMapOf(int);
+}
+}

aslib/src/main/as/com/threerings/media/util/AStarPathSearch_Node.as

@@ -0,0 +1,101 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+import flash.geom.Point;
+
+import com.threerings.util.Comparable;
+
+public class AStarPathSearch_Node
+    implements Comparable
+{
+    /** The node coordinates. */
+    public var x :int;
+    public var y :int;
+
+    /** The actual cheapest cost of arriving here from the start. */
+    public var g :int;
+
+    /** The heuristic estimate of the cost to the goal from here. */
+    public var h :int;
+
+    /** The score assigned to this node. */
+    public var f :int;
+
+    /** The node from which we reached this node. */
+    public var parent :AStarPathSearch_Node;
+
+    /** The node's monotonically-increasing unique identifier. */
+    public var id :int;
+
+    public function AStarPathSearch_Node (x :int, y :int)
+    {
+        this.x = x;
+        this.y = y;
+        id = _nextid++;
+    }
+
+    public function compareTo (o :Object) :int
+    {
+        var n :AStarPathSearch_Node = AStarPathSearch_Node(o);
+        var bf :int = n.f;
+
+        // since the set contract is fulfilled using the equality results returned here, and
+        // we'd like to allow multiple nodes with equivalent scores in our set, we explicitly
+        // define object equivalence as the result of object.equals(), else we use the unique
+        // node id since it will return a consistent ordering for the objects.
+        if (f == bf) {
+            return (this == n) ? 0 : (id - n.id);
+        }
+
+        return f - bf;
+    }
+
+    /**
+     * Return an array of <code>Point</code> objects detailing the path from the first node (the
+     * given node's ultimate parent) to the ending node (the given node itself.)
+     *
+     * @param node the ending node in the path.
+     *
+     * @return the list detailing the path.
+     */
+    public function getNodePath () :Array
+    {
+        var cur :AStarPathSearch_Node = this;
+        var path :Array = [];
+
+        while (cur != null) {
+            // add to the head of the list since we're traversing from
+            // the end to the beginning
+            path.unshift(new Point(cur.x, cur.y));
+
+            // advance to the next node in the path
+            cur = cur.parent;
+        }
+
+        return path;
+    }
+
+    /** The next unique node id. */
+    protected static var _nextid :int = 0;
+}
+}

aslib/src/main/as/com/threerings/media/util/AStarPathSearch_Stepper.as

@@ -0,0 +1,79 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+/**
+ * Considers all the possible steps the piece in question can take.
+ */
+public class AStarPathSearch_Stepper
+{
+    public function AStarPathSearch_Stepper (considerDiagonals :Boolean = true)
+    {
+        _considerDiagonals = considerDiagonals;
+    }
+
+    public function getMaxCost (longest :int) :int
+    {
+        return longest * ADJACENT_COST;
+    }
+
+    /**
+     * Return a heuristic estimate of the cost to get from <code>(ax, ay)</code> to
+     * <code>(bx, by)</code>.
+     */
+    public function getDistanceEstimate (ax :int, ay :int, bx :int, by :int) :int
+    {
+        // we're doing all of our cost calculations based on geometric distance times ten
+        var dx :int = bx - ax;
+        var dy :int = by - ay;
+        return int(Math.floor(ADJACENT_COST * Math.sqrt(dx * dx + dy * dy)));
+    }
+
+    /**
+     * Should call {@link #considerStep} in turn on all possible steps from the specified
+     * coordinates. No checking must be done as to whether the step is legal, that will be
+     * handled later. Just enumerate all possible steps.
+     */
+    public function considerSteps (info :AStarPathSearch_Info, node :AStarPathSearch_Node,
+        x :int, y :int) :void
+    {
+        info.considerStep(node, x, y - 1, ADJACENT_COST, this);
+        info.considerStep(node, x, y + 1, ADJACENT_COST, this);
+        info.considerStep(node, x - 1, y, ADJACENT_COST, this);
+        info.considerStep(node, x + 1, y, ADJACENT_COST, this);
+        if (_considerDiagonals) {
+            info.considerStep(node, x - 1, y - 1, DIAGONAL_COST, this);
+            info.considerStep(node, x + 1, y - 1, DIAGONAL_COST, this);
+            info.considerStep(node, x - 1, y + 1, DIAGONAL_COST, this);
+            info.considerStep(node, x + 1, y + 1, DIAGONAL_COST, this);
+        }
+    }
+
+    protected var _considerDiagonals :Boolean;
+
+    /** The standard cost to move between nodes. */
+    protected static const ADJACENT_COST :int = 10;
+
+    /** The cost to move diagonally. */
+    protected static const DIAGONAL_COST :int = int(Math.sqrt((ADJACENT_COST * ADJACENT_COST) * 2));
+}
+}

aslib/src/main/as/com/threerings/media/util/ExtendedTraversalPred.as

@@ -0,0 +1,36 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+/**
+ * Provides extended traversibility information when computing paths.
+ */
+public interface ExtendedTraversalPred extends TraversalPred
+{
+    /**
+     * Requests to know if the specific traverser (which was provided in the call to
+     * {@link #getPath(TraversalPred,Object,int,int,int,int,int,boolean)}) can traverse from
+     * the specified source tile coordinate to the specified destination tile coordinate.
+     */
+    function canTraverseBetween (traverser :Object, sx :int, sy :int, dx :int, dy :int) :Boolean;
+}
+}

aslib/src/main/as/com/threerings/media/util/LineSegmentPath.as

@@ -0,0 +1,376 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import com.threerings.util.ArrayIterator;
+import com.threerings.util.DirectionCodes;
+import com.threerings.util.DirectionUtil;
+import com.threerings.util.Iterator;
+import com.threerings.util.Log;
+import com.threerings.util.MathUtil;
+import com.threerings.util.StringUtil;
+
+/**
+ * The line segment path is used to cause a pathable to follow a path that
+ * is made up of a sequence of line segments. There must be at least two
+ * nodes in any worthwhile path. The direction of the first node in the
+ * path is meaningless since the pathable begins at that node and will
+ * therefore never be heading towards it.
+ */
+public class LineSegmentPath
+    implements Path
+{
+    private var log :Log = Log.getLog(LineSegmentPath);
+
+    /**
+     * Constructs an empty line segment path.
+     */
+    public function LineSegmentPath ()
+    {
+    }
+
+    /**
+     * Constructs a line segment path that consists of a single segment
+     * connecting the point <code>(x1, y1)</code> with <code>(x2,
+     * y2)</code>.  The orientation for the first node is set arbitrarily
+     * and the second node is oriented based on the vector between the two
+     * nodes (in top-down coordinates).
+     */
+    public static function createWithInts (x1 :int, y1 :int, x2 :int, y2 :int) :LineSegmentPath
+    {
+        var path :LineSegmentPath = new LineSegmentPath();
+        path.addNode(x1, y1, DirectionCodes.NORTH);
+        var p1 :Point = new Point(x1, y1);
+        var p2 :Point = new Point(x2, y2);
+        var dir :int = DirectionUtil.getDirectionForPts(p1, p2);
+        path.addNode(x2, y2, dir);
+        return path;
+    }
+
+    /**
+     * Construct a line segment path between the two nodes with the
+     * specified direction.
+     */
+    public static function createWithPoints (p1 :Point, p2 :Point, dir :int) :LineSegmentPath
+    {
+        var path :LineSegmentPath = new LineSegmentPath();
+        path.addNode(p1.x, p1.y, DirectionCodes.NORTH);
+        path.addNode(p2.x, p2.y, dir);
+        return path;
+    }
+
+    /**
+     * Constructs a line segment path with the specified list of points.
+     * An arbitrary direction will be assigned to the starting node.
+     */
+    public static function createWithList (points :Array) :LineSegmentPath
+    {
+        var path :LineSegmentPath = new LineSegmentPath();
+        path.createPath(points);
+        return path;
+    }
+
+    /**
+     * Returns the orientation the sprite will face at the end of the
+     * path.
+     */
+    public function getFinalOrientation () :int
+    {
+        return (_nodes.length == 0) ? DirectionCodes.NORTH : _nodes[_nodes.length-1].dir;
+    }
+
+    /**
+     * Add a node to the path with the specified destination point and
+     * facing direction.
+     *
+     * @param x the x-position.
+     * @param y the y-position.
+     * @param dir the facing direction.
+     */
+    public function addNode (x :Number, y :Number, dir :int) :void
+    {
+        _nodes.push(new PathNode(x, y, dir));
+    }
+
+    /**
+     * Return the requested node index in the path, or null if no such
+     * index exists.
+     *
+     * @param idx the node index.
+     *
+     * @return the path node.
+     */
+    public function getNode (idx :int) :PathNode
+    {
+        return _nodes[idx];
+    }
+
+    /**
+     * Return the number of nodes in the path.
+     */
+    public function size () :int
+    {
+        return _nodes.length;
+    }
+
+    /**
+     * Sets the velocity of this pathable in pixels per millisecond. The
+     * velocity is measured as pixels traversed along the path that the
+     * pathable is traveling rather than in the x or y directions
+     * individually.  Note that the pathable velocity should not be
+     * changed while a path is being traversed; doing so may result in the
+     * pathable position changing unexpectedly.
+     *
+     * @param velocity the pathable velocity in pixels per millisecond.
+     */
+    public function setVelocity (velocity :Number) :void
+    {
+        _vel = velocity;
+    }
+
+    /**
+     * Computes the velocity at which the pathable will need to travel
+     * along this path such that it will arrive at the destination in
+     * approximately the specified number of milliseconds. Efforts are
+     * taken to get the pathable there as close to the desired time as
+     * possible, but framerate variation may prevent it from arriving
+     * exactly on time.
+     */
+    public function setDuration (millis :int) :void
+    {
+        // if we have only zero or one nodes, we don't have enough
+        // information to compute our velocity
+        var ncount :int = _nodes.length;
+        if (ncount < 2) {
+            log.warning("Requested to set duration of bogus path " +
+                        "[path=" + this + ", duration=" + millis + "].");
+            return;
+        }
+
+        // compute the total distance along our path
+        var distance :Number = 0;
+        var start :PathNode = _nodes[0];
+        for (var ii :int = 1; ii < ncount; ii++) {
+            var end :PathNode = _nodes[ii];
+            distance += MathUtil.distance(start.loc.x, start.loc.y, end.loc.x, end.loc.y);
+            start = end;
+        }
+
+        // set the velocity accordingly
+        setVelocity(distance/millis);
+    }
+
+    // documentation inherited
+    public function init (pable :Pathable, timestamp :int) :void
+    {
+        // give the pathable a chance to perform any starting antics
+        pable.pathBeginning();
+
+        // if we have only one node then let the pathable know that we're
+        // done straight away
+        if (size() < 2) {
+            // move the pathable to the location specified by the first
+            // node (assuming we have a first node)
+            if (size() == 1) {
+                var node :PathNode = _nodes[0];
+                pable.setLocation(node.loc.x, node.loc.y);
+            }
+            // and let the pathable know that we're done
+            pable.pathCompleted(timestamp);
+            return;
+        }
+
+        // and an enumeration of the path nodes
+        _niter = new ArrayIterator(_nodes);
+
+        // pretend like we were previously heading to our starting position
+        _dest = getNextNode();
+
+        // begin traversing the path
+        headToNextNode(pable, timestamp, timestamp);
+    }
+
+    // documentation inherited
+    public function tick (pable :Pathable, timestamp :int) :Boolean
+    {
+        // figure out how far along this segment we should be
+        var msecs :int = timestamp - _nodestamp;
+        var travpix :Number = msecs * _vel;
+        var pctdone :Number = travpix / _seglength;
+
+        // if we've moved beyond the end of the path, we need to adjust
+        // the timestamp to determine how much time we used getting to the
+        // end of this node, then move to the next one
+        if (pctdone >= 1.0) {
+            var used :int = int(_seglength / _vel);
+            return headToNextNode(pable, _nodestamp + used, timestamp);
+        }
+
+        // otherwise we position the pathable along the path
+        var ox :Number = pable.getX();
+        var oy :Number = pable.getY();
+        var nx :Number = _src.loc.x + (_dest.loc.x - _src.loc.x) * pctdone;
+        var ny :Number = _src.loc.y + (_dest.loc.y - _src.loc.y) * pctdone;
+
+//         Log.info("Moving pathable [msecs=" + msecs + ", pctdone=" + pctdone +
+//                  ", travpix=" + travpix + ", seglength=" + _seglength +
+//                  ", dx=" + (nx-ox) + ", dy=" + (ny-oy) + "].");
+
+        // only update the pathable's location if it actually moved
+        if (ox != nx || oy != ny) {
+            pable.setLocation(nx, ny);
+            return true;
+        }
+
+        return false;
+    }
+
+    // documentation inherited
+    public function fastForward (timeDelta :int) :void
+    {
+        _nodestamp += timeDelta;
+    }
+
+    // documentation inherited from interface
+    public function wasRemoved (pable :Pathable) :void
+    {
+        // nothing doing
+    }
+
+    /**
+     * Place the pathable moving along the path at the end of the previous
+     * path node, face it appropriately for the next node, and start it on
+     * its way.  Returns whether the pathable position moved.
+     */
+    protected function headToNextNode (pable :Pathable, startstamp :int, now :int) :Boolean
+    {
+        if (_niter == null) {
+            throw new Error("headToNextNode() called before init()");
+        }
+
+        // check to see if we've completed our path
+        if (!_niter.hasNext()) {
+            // move the pathable to the location of our last destination
+            pable.setLocation(_dest.loc.x, _dest.loc.y);
+            pable.pathCompleted(now);
+            return true;
+        }
+
+        // our previous destination is now our source
+        _src = _dest;
+
+        // pop the next node off the path
+        _dest = getNextNode();
+
+        // adjust the pathable's orientation
+        if (_dest.dir != DirectionCodes.NONE) {
+            pable.setOrientation(_dest.dir);
+        }
+
+        // make a note of when we started traversing this node
+        _nodestamp = startstamp;
+
+        // figure out the distance from source to destination
+        _seglength = MathUtil.distance(_src.loc.x, _src.loc.y, _dest.loc.x, _dest.loc.y);
+
+        // if we're already there (the segment length is zero), we skip to
+        // the next segment
+        if (_seglength == 0) {
+            return headToNextNode(pable, startstamp, now);
+        }
+
+        // now update the pathable's position based on our progress thus far
+        return tick(pable, now);
+    }
+
+    public function toString () :String
+    {
+        return StringUtil.toString(_nodes);
+    }
+
+    /**
+     * Populate the path with the path nodes that lead the pathable from
+     * its starting position to the given destination coordinates
+     * following the given list of screen coordinates.
+     */
+    protected function createPath (points :Array) :void
+    {
+        var last :Point = null;
+        var size :int = points.length;
+        for (var ii :int = 0; ii < size; ii++) {
+            var p :Point = points[ii];
+
+            var dir :int = (ii == 0) ? DirectionCodes.NORTH :
+                DirectionUtil.getDirectionForPts(last, p);
+            addNode(p.x, p.y, dir);
+            last = p;
+        }
+    }
+
+    /**
+     * Gets the next node in the path.
+     */
+    protected function getNextNode () :PathNode
+    {
+        return PathNode(_niter.next());
+    }
+
+    /** The nodes that make up the path. */
+    protected var _nodes :Array = [];
+
+    /** We use this when moving along this path. */
+    protected var _niter :Iterator;
+
+    /** When moving, the pathable's source path node. */
+    protected var _src :PathNode;
+
+    /** When moving, the pathable's destination path node. */
+    protected var _dest :PathNode;
+
+    /** The time at which we started traversing the current node. */
+    protected var _nodestamp :int;
+
+    /** The length in pixels of the current path segment. */
+    protected var _seglength :Number;
+
+    /** The path velocity in pixels per millisecond. */
+    protected var _vel :Number = DEFAULT_VELOCITY;
+
+    /** When moving, the pathable position including fractional pixels. */
+    protected var _movex :Number;
+    protected var _movey :Number;
+
+    /** When moving, the distance to move on each axis per tick. */
+    protected var _incx :Number;
+    protected var _incy :Number;
+
+    /** The distance to move on the straight path line per tick. */
+    protected var _fracx :Number;
+    protected var _fracy :Number;
+
+    /** Default pathable velocity. */
+    protected static const DEFAULT_VELOCITY :Number= 0.2;
+}
+}

aslib/src/main/as/com/threerings/media/util/Path.as

@@ -0,0 +1,71 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+/**
+ * A path is used to cause a {@link Pathable} to follow a particular path along the screen. The
+ * {@link Pathable} is responsible for calling {@link #tick} on the path with reasonable frequency
+ * (generally as a part of the frame tick. The path is responsible for updating the position of
+ * the {@link Pathable} based on the time that has elapsed since the {@link Pathable} started down
+ * the path.
+ *
+ * <p> The path should call the appropriate callbacks on the {@link Pathable} when appropriate
+ * (e.g. {@link Pathable#pathBeginning}, {@link Pathable#pathCompleted}).
+ */
+public interface Path
+{
+    /**
+     * Called once to let the path prepare itself for the process of animating the supplied
+     * pathable. Path users should also call {@link #tick} after {@link #init} with the same
+     * initialization timestamp.
+     */
+    function init (pable :Pathable, tickStamp :int) :void;
+
+    /**
+     * Called to request that this path update the position of the specified pathable based on the
+     * supplied timestamp information. A path should record its initial timestamp and determine
+     * the progress of the pathable along the path based on the time elapsed since the pathable
+     * began down the path.
+     *
+     * @param pable the pathable whose position should be updated.
+     * @param tickStamp the timestamp associated with this frame.
+     *
+     * @return true if the pathable's position was updated, false if the path determined that the
+     * pathable should not move at this time.
+     */
+    function tick (pable :Pathable, tickStamp :int) :Boolean;
+
+    /**
+     * This is called if the pathable is paused for some length of time and then unpaused. Paths
+     * should adjust any time stamps they are maintaining internally by the delta so that time
+     * maintains the illusion of flowing smoothly forward.
+     */
+    function fastForward (timeDelta :int) :void;
+
+    /**
+     * When a path is removed from a pathable, whether that is because the path was completed or
+     * because it was replaced by another path, this method will be called to let the path know
+     * that it is no longer associated with this pathable.
+     */
+    function wasRemoved (pable :Pathable) :void;
+}
+}

aslib/src/main/as/com/threerings/media/util/PathNode.as

@@ -0,0 +1,55 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+import flash.geom.Point;
+
+/**
+ * A path node is a single destination point in a {@link Path}.
+ */
+public class PathNode
+{
+/** The node coordinates in screen pixels. */
+    public var loc :Point;
+
+    /** The direction to face while heading toward the node. */
+    public var dir :int;
+
+    /**
+     * Construct a path node object.
+     *
+     * @param x the node x-position.
+     * @param y the node y-position.
+     * @param dir the facing direction.
+     */
+    public function PathNode (x :Number, y :Number, dir :int)
+    {
+        loc = new Point(x, y);
+        this.dir = dir;
+    }
+
+    public function toString () :String
+    {
+        return "[x=" + loc.x + ", y=" + loc.y + ", dir=" + dir + "]";
+    }
+}
+}

aslib/src/main/as/com/threerings/media/util/Pathable.as

@@ -0,0 +1,71 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+import flash.geom.Rectangle;
+
+/**
+ * Used in conjunction with a {@link Path}.
+ */
+public interface Pathable
+{
+    /**
+     * Returns the pathable's current x coordinate.
+     */
+    function getX () :Number;
+
+    /**
+     * Returns the pathable's current y coordinate.
+     */
+    function getY () :Number;
+
+    /**
+     * Updates the pathable's current coordinates.
+     */
+    function setLocation (x :Number, y :Number) :void;
+
+    /**
+     * Will be called by a path when it moves the pathable in the
+     * specified direction. Pathables that wish to face in the direction
+     * they are moving can take advantage of this callback.
+     *
+     * @see DirectionCodes
+     */
+    function setOrientation (orient :int) :void;
+
+    /**
+     * Should return the orientation of the pathable, or {@link
+     * DirectionCodes#NONE} if the pathable does not support orientation.
+     */
+    function getOrientation () :int;
+
+    /**
+     * Called by a path when this pathable is made to start along a path.
+     */
+    function pathBeginning () :void;
+
+    /**
+     * Called by a path when this pathable finishes moving along its path.
+     */
+    function pathCompleted (timestamp :int) :void;
+}
+}

aslib/src/main/as/com/threerings/media/util/TraversalPred.as

@@ -0,0 +1,36 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.util {
+
+/**
+ * Provides traversibility information when computing paths.
+ */
+public interface TraversalPred
+{
+    /**
+     * Requests to know if the specified traverser (which was provided in the call to
+     * {@link #getPath(TraversalPred,Object,int,int,int,int,int,boolean)}) can traverse the
+     * specified tile coordinate.
+     */
+    function canTraverse (traverser :Object, x :int, y :int) :Boolean;
+}
+}

aslib/src/main/as/com/threerings/miso/client/BaseTileIsoSprite.as

@@ -0,0 +1,46 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+import flash.display.DisplayObject;
+
+import com.threerings.media.tile.Tile;
+import com.threerings.miso.util.MisoSceneMetrics;
+
+public class BaseTileIsoSprite extends TileIsoSprite
+{
+    public function BaseTileIsoSprite (x :int, y :int, tileId :int, tile :Tile,
+                                       metrics :MisoSceneMetrics, fringe :Tile)
+    {
+        super(x, y, tileId, tile, 0, metrics, fringe);
+    }
+
+    public override function layout (x :int, y :int, tile :Tile) :void
+    {
+        super.layout(x, y, tile);
+
+        setSize(1, 1, VERT_OFFSET);
+    }
+
+    protected static const VERT_OFFSET :Number = 0.01;
+}
+}

aslib/src/main/as/com/threerings/miso/client/MisoMetricsTransformation.as

@@ -0,0 +1,86 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+import as3isolib.geom.Pt;
+import as3isolib.geom.transformations.IAxonometricTransformation;
+
+import com.threerings.miso.util.MisoSceneMetrics;
+
+public class MisoMetricsTransformation implements IAxonometricTransformation
+{
+    public function MisoMetricsTransformation (metrics :MisoSceneMetrics, zFact :Number)
+    {
+        _metrics = metrics;
+        _zFact = zFact;
+    }
+
+    public function screenToSpace (screenPt :Pt) :Pt
+    {
+        var tpos :Pt = new Pt();
+
+        // determine the upper-left of the quadrant that contains our point
+        var zx :int = int(Math.floor(screenPt.x / _metrics.tilewid));
+        var zy :int = int(Math.floor(screenPt.y / _metrics.tilehei));
+
+        // these are the screen coordinates of the tile's top
+        var ox :int = (zx * _metrics.tilewid);
+        var oy :int = (zy * _metrics.tilehei);
+
+        // these are the tile coordinates
+        tpos.x = zy + zx;
+        tpos.y = zy - zx;
+        tpos.z = 0;
+
+        // these are the tile coordinates
+        tpos.x = zy + zx; tpos.y = zy - zx;
+
+        // now determine which of the four tiles our point occupies
+        var dx :int = screenPt.x - ox;
+        var dy :int = screenPt.y - oy;
+
+        if (Math.round(_metrics.slopeY * dx + _metrics.tilehei) <= dy) {
+            tpos.x += 1;
+        }
+
+        if (Math.round(_metrics.slopeX * dx) > dy) {
+            tpos.y -= 1;
+        }
+
+        return tpos;
+    }
+
+    public function spaceToScreen (spacePt :Pt) :Pt
+    {
+        var spos :Pt = new Pt();
+        spos.x = (spacePt.x - spacePt.y) * _metrics.tilehwid;
+        spos.y = (spacePt.x + spacePt.y) * _metrics.tilehhei - spacePt.z * _zFact;
+        spos.z = 0;
+        return spos;
+    }
+
+    protected var _metrics :MisoSceneMetrics;
+
+    /** Handles any vertical transformations. */
+    protected var _zFact :Number;
+}
+}

aslib/src/main/as/com/threerings/miso/client/MisoScenePanel.as

@@ -0,0 +1,732 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+import flash.utils.getTimer;
+
+import flash.display.DisplayObject;
+import flash.display.Sprite;
+
+import flash.events.Event;
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import flash.text.TextField;
+import flash.text.TextFieldAutoSize;
+import flash.text.TextFormat;
+
+import flash.events.MouseEvent;
+
+import mx.core.ClassFactory;
+
+import as3isolib.display.IsoSprite;
+import as3isolib.display.primitive.IsoBox;
+import as3isolib.core.IsoDisplayObject;
+import as3isolib.geom.Pt;
+import as3isolib.geom.IsoMath;
+import as3isolib.display.scene.IsoScene;
+import as3isolib.display.IsoView;
+
+import com.threerings.crowd.client.PlaceView;
+import com.threerings.crowd.data.PlaceObject;
+import com.threerings.util.ClassUtil;
+import com.threerings.util.DelayUtil;
+import com.threerings.util.Log;
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.util.MathUtil;
+import com.threerings.util.Set;
+import com.threerings.util.Sets;
+import com.threerings.util.StringUtil;
+import com.threerings.util.maps.WeakValueMap;
+import com.threerings.media.Tickable;
+import com.threerings.media.tile.BaseTile;
+import com.threerings.media.tile.Colorizer;
+import com.threerings.media.tile.NoSuchTileSetError;
+import com.threerings.media.tile.TileSet;
+import com.threerings.media.tile.TileUtil;
+import com.threerings.media.util.AStarPathSearch;
+import com.threerings.media.util.AStarPathSearch_Stepper;
+import com.threerings.media.util.LineSegmentPath;
+import com.threerings.media.util.Path;
+import com.threerings.media.util.Pathable;
+import com.threerings.media.util.TraversalPred;
+import com.threerings.miso.client.MisoMetricsTransformation;
+import com.threerings.miso.client.PrioritizedSceneLayoutRenderer;
+import com.threerings.miso.data.MisoSceneModel;
+import com.threerings.miso.data.ObjectInfo;
+import com.threerings.miso.tile.FringeTile;
+import com.threerings.miso.util.MisoContext;
+import com.threerings.miso.util.ObjectSet;
+import com.threerings.miso.util.MisoSceneMetrics;
+
+public class MisoScenePanel extends Sprite
+    implements PlaceView, TraversalPred, Tickable
+{
+    private var log :Log = Log.getLog(MisoScenePanel);
+
+    public function MisoScenePanel (ctx :MisoContext, metrics :MisoSceneMetrics)
+    {
+        _ctx = ctx;
+        // Excitingly, we get to override this globally for as3isolib...
+        IsoMath.transformationObject = new MisoMetricsTransformation(metrics,
+            metrics.tilehei * 3 / 4);
+
+        _metrics = metrics;
+
+        _isoView = new IsoView();
+        _isoView.setSize(DEF_WIDTH, DEF_HEIGHT);
+
+        _centerer = new Centerer(_isoView);
+
+        _vbounds = new Rectangle(0, 0,
+            _isoView.size.x, _isoView.size.y);
+
+        _isoView.addEventListener(MouseEvent.CLICK, onClick);
+        _isoView.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoved);
+        _isoView.addEventListener(MouseEvent.ROLL_OUT, mouseExited);
+
+        addObjectScenes();
+
+        addChild(_loading = createLoadingPanel());
+
+        addEventListener(Event.ADDED_TO_STAGE, addedToStage);
+        addEventListener(Event.REMOVED_FROM_STAGE, removedFromStage);
+    }
+
+    /**
+     * Handles Event.ADDED_TO_STAGE.
+     */
+    protected function addedToStage (event :Event) :void
+    {
+        _ctx.getTicker().registerTickable(this);
+    }
+
+    /**
+     * Handles Event.REMOVED_FROM_STAGE.
+     */
+    protected function removedFromStage (event :Event) :void
+    {
+        _ctx.getTicker().removeTickable(this);
+    }
+
+    public function tick (tickStamp :int) :void
+    {
+        _centerer.tick(tickStamp);
+    }
+
+    /**
+     * Creates whatever we want to show while we're waiting to load our exciting scene tile data.
+     */
+    protected function createLoadingPanel () :DisplayObject
+    {
+        // By default we just stick up a basic label for this...
+        var loadingText :TextField = new TextField();
+        loadingText.textColor = 0xFFFFFF;
+        var loadingFmt :TextFormat = new TextFormat();
+        loadingFmt.size = 24;
+        loadingText.defaultTextFormat = loadingFmt;
+        loadingText.autoSize = TextFieldAutoSize.LEFT;
+
+        _loadingProgressFunc = function (progress :Number) :void {
+            loadingText.text = "Loading... " + int(progress*100) + "%";
+            loadingText.x = (_isoView.size.x - loadingText.width)/2;
+            loadingText.y = (_isoView.size.y - loadingText.height)/2;
+
+        };
+        _loadingProgressFunc(0.0);
+        return loadingText;
+    }
+
+    protected function loadingProgress (progress :Number) :void
+    {
+        if (_loadingProgressFunc != null) {
+            _loadingProgressFunc(progress);
+        }
+    }
+
+    public function onClick (event :MouseEvent) :void
+    {
+        handleMousePressed(_hobject, event);
+    }
+
+    public function mouseMoved (event :MouseEvent) :void
+    {
+        var viewPt :Point = _isoView.globalToLocal(new Point(event.stageX, event.stageY));
+
+        var x :int = event.stageX;
+        var y :int = event.stageY;
+
+        // give derived classes a chance to start with a hover object
+        var hobject :Object = computeOverHover(x, y);
+
+        // if they came up with nothing, compute the list of objects over
+        // which the mouse is hovering
+        if (hobject == null) {
+            var hits :Array =
+                _objScene.displayListChildren.filter(
+                    function(val :Object, idx :int, arr :Array) :Boolean {
+                        if (val is PriorityIsoDisplayObject) {
+                            return PriorityIsoDisplayObject(val).hitTest(x, y);
+                        } else {
+                            return false;
+                        }
+                    });
+
+            hits.sort(function (v1 :PriorityIsoDisplayObject, v2 :PriorityIsoDisplayObject) :int {
+                    // We want reverse order, highest prio first...
+                    return v2.getPriority() - v1.getPriority();
+                });
+
+            if (hits.length > 0) {
+                hobject = hits[0];
+            }
+        }
+
+        // if the user isn't hovering over a sprite or object with an
+        // action, allow derived classes to provide some other hover
+        if (hobject == null) {
+            hobject = computeUnderHover(x, y);
+        }
+
+        changeHoverObject(hobject);
+    }
+
+    /**
+     * Gives derived classes a chance to compute a hover object that takes precedence over sprites
+     * and actionable objects. If this method returns non-null, no sprite or object hover
+     * calculations will be performed and the object returned will become the new hover object.
+     */
+    protected function computeOverHover (mx :int, my :int) :Object
+    {
+        return null;
+    }
+
+    /**
+     * Gives derived classes a chance to compute a hover object that is used if the mouse is not
+     * hovering over a sprite or actionable object. If this method is called, it means that there
+     * are no sprites or objects under the mouse. Thus if it returns non-null, the object returned
+     * will become the new hover object.
+     */
+    protected function computeUnderHover (mx :int, my :int) :Object
+    {
+        return null;
+    }
+
+    /**
+     * Change the hover object to the new object.
+     */
+    protected function changeHoverObject (newHover :Object) :void
+    {
+        if (newHover == _hobject) {
+            return;
+        }
+        var oldHover :Object = _hobject;
+        _hobject = newHover;
+        hoverObjectChanged(oldHover, newHover);
+    }
+
+    /**
+     * A place for subclasses to react to the hover object changing.
+     * One of the supplied arguments may be null.
+     */
+    protected function hoverObjectChanged (oldHover :Object, newHover :Object) :void
+    {
+        // Nothing by default.
+    }
+
+    public function mouseExited (event :MouseEvent) :void
+    {
+        // clear the highlight tracking data
+        changeHoverObject(null);
+    }
+
+    public function handleMousePressed (hobject :Object, event :MouseEvent) :Boolean
+    {
+        var viewPt :Point = _isoView.globalToLocal(new Point(event.stageX, event.stageY));
+        moveBy(new Point(viewPt.x - _isoView.width / 2, viewPt.y - _isoView.height / 2), false);
+        return true;
+    }
+
+    public function moveBy (pt :Point, immediate :Boolean) :void
+    {
+        // No scene model yet, just do it...
+        if (_model == null) {
+            _centerer.moveTo(pt.x + _isoView.currentX, pt.y + _isoView.currentY, immediate);
+            return;
+        }
+
+        if (_pendingMoveBy != null) {
+            log.info("Already performing a move...");
+            return;
+        }
+        _pendingMoveBy = pt;
+
+        refreshBaseBlockScenes();
+    }
+
+    public function setSceneModel (model :MisoSceneModel) :void
+    {
+        _model = model;
+        _ctx.getTileManager().ensureLoaded(_model.getAllTilesets(), function() :void {
+                DelayUtil.delayFrame(function() :void {
+                    refreshScene();
+                    DelayUtil.delayFrame(function() :void {
+                        removeChild(_loading);
+                        addChild(_isoView);
+                    });
+                });
+            }, loadingProgress);
+    }
+
+    public function willEnterPlace (plobj :PlaceObject) :void
+    {
+    }
+
+    public function didLeavePlace (plobj :PlaceObject) :void
+    {
+    }
+
+    /** Computes the fringe tile for the specified coordinate. */
+    public function computeFringeTile (tx :int, ty :int) :BaseTile
+    {
+        return _ctx.getTileManager().getFringer().getFringeTile(_model, tx, ty, _fringes,
+            _masks);
+    }
+
+    protected function getBaseBlocks (buffer :Boolean) :Set
+    {
+        var blocks :Set = Sets.newSetOf(int);
+
+        var size :Point = _isoView.size;
+
+        var xMove :int = (_pendingMoveBy == null ? 0 : _pendingMoveBy.x);
+        var yMove :int = (_pendingMoveBy == null ? 0 : _pendingMoveBy.y);
+
+        var minX :int = xMove - (buffer ? size.x/2 : 0);
+        var maxX :int = size.x + xMove + (buffer ? size.x/2 : 0);
+        var minY :int = yMove - (buffer ? size.y/2 : 0);
+        var maxY :int = BOTTOM_BUFFER + size.y + yMove + (buffer ? size.y/2 : 0);
+
+        var topLeft :Point = _isoView.localToIso(new Point(minX, minY));
+        var topRight :Point = _isoView.localToIso(new Point(maxX, minY));
+        var btmLeft :Point = _isoView.localToIso(new Point(minX, maxY));
+        var btmRight :Point = _isoView.localToIso(new Point(maxX, maxY));
+
+        for (var yy :int = topRight.y - 1; yy <= btmLeft.y + 1; yy++) {
+            for (var xx :int = topLeft.x - 1; xx <= btmRight.x + 1; xx++) {
+
+                // Toss out any that aren't actually in our view.
+                var blkTop :Point = _isoView.isoToLocal(new Pt(xx, yy, 0));
+                var blkRight :Point =
+                    _isoView.isoToLocal(new Pt(xx + SceneBlock.BLOCK_SIZE, yy, 0));
+                var blkLeft :Point =
+                    _isoView.isoToLocal(new Pt(xx, yy + SceneBlock.BLOCK_SIZE, 0));
+                var blkBtm :Point =
+                    _isoView.isoToLocal(new Pt(xx + SceneBlock.BLOCK_SIZE,
+                        yy + SceneBlock.BLOCK_SIZE, 0));
+                if (blkTop.y < maxY &&
+                    blkBtm.y > minY &&
+                    blkLeft.x < maxX &&
+                    blkRight.x > minX) {
+                    blocks.add(SceneBlock.getBlockKey(xx, yy));
+                }
+            }
+        }
+
+        return blocks;
+    }
+
+    protected function createSceneBlock (blockKey :int) :SceneBlock
+    {
+        return new SceneBlock(blockKey, _objScene, _isoView, _metrics);
+    }
+
+    protected function refreshBaseBlockScenes () :void
+    {
+        _resStartTime = getTimer();
+
+        // Clear em til we're done resolving.
+        _pendingPrefetchBlocks = [];
+
+        var blocks :Set = getBaseBlocks(false);
+
+        // Keep this to use in our function...
+        var thisRef :MisoScenePanel = this;
+
+        // Postpone calling complete til they're all queued up.
+        _skipComplete = true;
+
+        blocks.forEach(function(blockKey :int) :void {
+            if (!_blocks.containsKey(blockKey)) {
+                if (_prefetchedBlocks.containsKey(blockKey)) {
+                    _readyBlocks.add(_prefetchedBlocks.remove(blockKey));
+                } else {
+                    var sceneBlock :SceneBlock = createSceneBlock(blockKey);
+                    _pendingBlocks.add(sceneBlock);
+                    sceneBlock.resolve(_ctx, _model, thisRef, blockResolved);
+                }
+            }
+        });
+
+        _skipComplete = false;
+
+
+        if (_pendingBlocks.size() == 0) {
+            resolutionComplete();
+        }
+    }
+
+    protected function blockResolved (resolved :SceneBlock) :void
+    {
+        if (!_pendingBlocks.contains(resolved)) {
+            log.info("Trying to resolve non-pending block???: " + resolved.getKey());
+        }
+        // Move that guy from pending to ready...
+        _readyBlocks.add(resolved);
+        _pendingBlocks.remove(resolved);
+        if (_pendingBlocks.size() == 0 && !_skipComplete) {
+            resolutionComplete();
+        }
+    }
+
+    protected function renderObjectScenes () :void
+    {
+        _objScene.render();
+    }
+
+    protected function addObjectScenes () :void
+    {
+        _objScene = new IsoScene();
+        _objScene.layoutRenderer = new ClassFactory(PrioritizedSceneLayoutRenderer);
+
+        _isoView.addScene(_objScene);
+    }
+
+    protected function resolutionComplete () :void
+    {
+        // First, we add in our new blocks...
+        for each (var newBlock :SceneBlock in _readyBlocks.toArray()) {
+            newBlock.render();
+            newBlock.addToCovered(_covered);
+            _blocks.put(newBlock.getKey(), newBlock);
+        }
+        _readyBlocks = Sets.newSetOf(SceneBlock);
+
+        renderObjectScenes();
+
+        // Then we let the scene finally move if it's trying to...
+        if (_pendingMoveBy != null) {
+            _centerer.moveTo(_pendingMoveBy.x + _isoView.currentX,
+                _pendingMoveBy.y + _isoView.currentY, false);
+            _pendingMoveBy = null;
+        }
+
+        // Now, take out any old blocks no longer in our valid blocks.
+        var blocks :Set = getBaseBlocks(true);
+        for each (var baseKey :int in _blocks.keys()) {
+            if (!blocks.contains(baseKey)) {
+                _blocks.remove(baseKey).release();
+            }
+        }
+        // And any prefetch blocks that are bogus can go away too.
+        for each (var preKey :int in _prefetchedBlocks.keys()) {
+            if (!blocks.contains(preKey)) {
+                _prefetchedBlocks.remove(preKey);
+            }
+        }
+
+        log.info("Scene Block Resolution took: " + (getTimer() - _resStartTime) + "ms");
+
+        // Let's setup some prefetching...
+        blocks.forEach(function(blockKey :int) :void {
+            if (!_blocks.containsKey(blockKey)) {
+                var sceneBlock :SceneBlock = createSceneBlock(blockKey);
+                _pendingPrefetchBlocks.push(sceneBlock);
+            }
+        });
+
+        maybePrefetchABlock();
+    }
+
+    protected function maybePrefetchABlock () :void
+    {
+        if (_pendingPrefetchBlocks.length != 0) {
+            _pendingPrefetchBlocks.shift().resolve(_ctx, _model, this, prefetchBlockResolved);
+        }
+    }
+
+    protected function prefetchBlockResolved (resolved :SceneBlock) :void
+    {
+        _prefetchedBlocks.put(resolved.getKey(), resolved);
+
+        // If we haven't moved on to resolve a new region, let's try another block.
+        if (_pendingBlocks.size() == 0) {
+            DelayUtil.delayFrame(function() :void {
+                maybePrefetchABlock();
+            });
+        }
+    }
+
+    protected function refreshScene () :void
+    {
+        // Clear it out...
+        _isoView.removeAllScenes();
+
+        refreshBaseBlockScenes();
+    }
+
+    /**
+     * Derived classes can override this method and provide a colorizer that will be used to
+     * colorize the supplied scene object when rendering.
+     */
+    public function getColorizer (oinfo :ObjectInfo) :Colorizer
+    {
+        return null;
+    }
+
+    // documentation inherited
+    public function canTraverse (traverser :Object, tx :int, ty :int) :Boolean
+    {
+        var block :SceneBlock = _blocks.get(SceneBlock.getBlockKey(tx, ty));
+        var baseTraversable :Boolean = (block == null) ? canTraverseUnresolved(traverser, tx, ty) :
+            block.canTraverseBase(traverser, tx, ty);
+
+        return baseTraversable && !_covered.contains(StringUtil.toCoordsString(tx, ty));
+    }
+
+    /**
+     * Derived classes can control whether or not we consider unresolved tiles to be traversable
+     * or not.
+     */
+    protected function canTraverseUnresolved (traverser :Object, tx :int, ty :int) :Boolean
+    {
+        return false;
+    }
+
+    /**
+     * Computes a path for the specified sprite to the specified tile coordinates.
+     *
+     * @param loose if true, an approximate path will be returned if a complete path cannot be
+     * located. This path will navigate the sprite "legally" as far as possible and then walk the
+     * sprite in a straight line to its final destination. This is generally only useful if the
+     * the path goes "off screen".
+     */
+    public function getPath (sprite :IsoDisplayObject, x :int, y :int, loose :Boolean) :Path
+    {
+        // sanity check
+        if (sprite == null) {
+            throw new Error("Can't get path for null sprite [x=" + x + ", y=" + y + ".");
+        }
+
+        // compute our longest path from the screen size
+        var longestPath :int = 3 * (width / _metrics.tilewid);
+
+        // get a reasonable tile path through the scene
+        var start :int = getTimer();
+        var search :AStarPathSearch = new AStarPathSearch(this, new AStarPathSearch_Stepper());
+        var points :Array = search.getPath(sprite, longestPath, int(Math.round(sprite.x)),
+            int(Math.round(sprite.y)), x, y, loose);
+
+        // Replace the starting point with the Number values rather than the rounded version...
+        if (points != null) {
+            points[0] = new Point(sprite.x, sprite.y);
+        }
+
+        var duration :int = getTimer() - start;
+
+        // sanity check the number of nodes searched so that we can keep an eye out for bogosity
+        if (duration > 500) {
+            log.warning("Considered a lot of nodes for path from " +
+                StringUtil.toCoordsString(sprite.x, sprite.y) + " to " +
+                StringUtil.toCoordsString(x, y) +
+                " [duration=" + duration + "].");
+        }
+
+        // construct a path object to guide the sprite on its merry way
+        return (points == null) ? null : LineSegmentPath.createWithList(points);
+    }
+
+    protected var _model :MisoSceneModel;
+
+    protected var _isoView :IsoView;
+
+    protected var _ctx :MisoContext;
+
+    protected var _metrics :MisoSceneMetrics;
+
+    /** What we display while we're loading up our tilesets. */
+    protected var _loading :DisplayObject;
+
+    /** If we should do something when we hear about progress updates, this is it. */
+    protected var _loadingProgressFunc :Function;
+
+    protected var _objScene :IsoScene;
+
+    /** All of the active blocks that are part of the scene. */
+    protected var _blocks :Map = Maps.newMapOf(int);
+
+    /** If we're resolving in preparation for moving, this is how much we'll move by when ready. */
+    protected var _pendingMoveBy :Point;
+
+    /** Required blocks we're working on resolving. */
+    protected var _pendingBlocks :Set = Sets.newSetOf(SceneBlock);
+
+    /** Blocks that are resolved and ready for adding to the scene. */
+    protected var _readyBlocks :Set = Sets.newSetOf(SceneBlock);
+
+    /** The queue of blocks we'd like to prefetch when we have a chance. */
+    protected var _pendingPrefetchBlocks :Array = [];
+
+    /** The blocks already prefetched and ready to go if we need them. */
+    protected var _prefetchedBlocks :Map = Maps.newMapOf(int);
+
+    protected var _masks :Map = Maps.newMapOf(int);
+    protected var _fringes :Map = new WeakValueMap(Maps.newMapOf(FringeTile));
+
+    /** What time did we start the current scene resolution. */
+    protected var _resStartTime :int;
+
+    /** If any block happens to resolve should we currently skip calling completion. */
+    protected var _skipComplete :Boolean
+
+    /** Info on the object that the mouse is currently hovering over. */
+    protected var _hobject :Object;
+
+    protected var _vbounds :Rectangle;
+
+    protected var _covered :Set = Sets.newSetOf(String);
+
+    protected var _centerer :Centerer;
+
+    protected const DEF_WIDTH :int = 985;
+    protected const DEF_HEIGHT :int = 560;
+
+    protected const BOTTOM_BUFFER :int = 300;
+}
+}
+
+import as3isolib.display.IsoView;
+import as3isolib.geom.Pt;
+
+import com.threerings.media.util.LineSegmentPath;
+import com.threerings.media.util.Path;
+import com.threerings.media.util.Pathable;
+import com.threerings.media.Tickable;
+
+import com.threerings.util.DirectionCodes;
+
+
+class Centerer
+    implements Pathable, Tickable
+{
+    public function Centerer (isoView :IsoView)
+    {
+        _isoView = isoView;
+    }
+
+    public function moveTo (x :int, y:int, immediate :Boolean) :void
+    {
+        if (immediate) {
+            cancelMove();
+            setLocation(x, y);
+        } else {
+            var path :LineSegmentPath =
+                LineSegmentPath.createWithInts(_isoView.currentX, _isoView.currentY, x, y);
+            path.setVelocity(SCROLL_VELOCITY);
+            move(path);
+        }
+    }
+
+    public function move (path :Path) :void
+    {
+        // if there's a previous path, let it know that it's going away
+        cancelMove();
+
+        // save off this path
+        _path = path;
+
+        // we'll initialize it on our next tick thanks to a zero path stamp
+        _pathStamp = 0;
+    }
+
+    public function cancelMove () :void
+    {
+        if (_path != null) {
+            var oldpath :Path = _path;
+            _path = null;
+            oldpath.wasRemoved(this);
+        }
+    }
+
+    public function tick (tickStamp :int) :void
+    {
+        if (_path != null) {
+            if (_pathStamp == 0) {
+                _pathStamp = tickStamp
+                _path.init(this, _pathStamp);
+            }
+            _path.tick(this, tickStamp);
+        }
+    }
+
+    public function getX () :Number
+    {
+        return _isoView.currentX;
+    }
+
+    public function getY () :Number
+    {
+        return _isoView.currentY;
+    }
+
+    public function setLocation (x :Number, y :Number) :void
+    {
+        _isoView.centerOnPt(new Pt(x, y), false);
+    }
+
+    public function setOrientation (orient :int) :void
+    {
+    }
+
+    public function getOrientation () :int
+    {
+        return DirectionCodes.NONE;
+    }
+
+    public function pathBeginning () :void
+    {
+    }
+
+    public function pathCompleted (timestamp :int) :void
+    {
+        _path = null;
+    }
+
+    protected var _isoView :IsoView;
+    protected var _path :Path;
+    protected var _pathStamp :int;
+
+    /** Our scroll path velocity. */
+    protected static const SCROLL_VELOCITY :Number = 0.4;
+}

aslib/src/main/as/com/threerings/miso/client/ObjectTileIsoSprite.as

@@ -0,0 +1,45 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+import com.threerings.media.tile.ObjectTile;
+import com.threerings.media.tile.Tile;
+import com.threerings.miso.util.MisoSceneMetrics;
+
+public class ObjectTileIsoSprite extends TileIsoSprite
+{
+    public function ObjectTileIsoSprite (x :int, y :int, tileId :int, tile :Tile,
+                                         priority :int, metrics :MisoSceneMetrics)
+    {
+        super(x, y, tileId, tile, ObjectTile(tile).getPriority() == 0 ?
+                priority : ObjectTile(tile).getPriority(), metrics);
+    }
+
+    public override function layout (x :int, y :int, tile :Tile) :void
+    {
+        super.layout(x, y, tile);
+
+        setSize(tile.getBaseWidth(), tile.getBaseHeight(), 1);
+        moveBy(-(tile.getBaseWidth() - 1), -(tile.getBaseHeight() - 1), 0);
+    }
+}
+}

aslib/src/main/as/com/threerings/miso/client/PrioritizedSceneLayoutRenderer.as

@@ -0,0 +1,178 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+import flash.utils.Dictionary;
+import flash.utils.getTimer;
+
+import as3isolib.display.renderers.ISceneLayoutRenderer;
+import as3isolib.bounds.IBounds;
+import as3isolib.core.as3isolib_internal;
+import as3isolib.core.IsoDisplayObject;
+import as3isolib.display.scene.IIsoScene;
+
+/**
+ * Adapted from the as3isolib DefaultSceneLayoutRenderer, but thanks to its private vars, I cannot
+ *  simply extend that class.
+ */
+public class PrioritizedSceneLayoutRenderer
+    implements ISceneLayoutRenderer
+{
+    /**
+     * Places all of our children in their appropriate rendering order based on their iso bounds
+     *  and as necessary, by priority.  Priority only comes into play if the iso bounds overlap.
+     */
+    public function renderScene (scene:IIsoScene):void
+    {
+        // This is a little brute-force.  Some suggestions from DefaultSceneLayoutRenderer:
+        // - cache dependencies between frames, only adjust invalidated objects, keeping old
+        //   ordering as best as possible
+        // - screen space subdivision to limit dependency scan
+        // - set the invalidated children first, then do a rescan to make sure everything else is
+        //   where it needs to be, too?  probably need to order the invalidated children sets from
+        //   low to high index
+
+        // Reset everything for this rendering pass.
+        _scene = scene;
+        _dependencies = new Dictionary();
+        _depth = 0;
+        _visited = new Dictionary();
+
+        var startTime:uint = getTimer();
+
+        // Use the non-rearranging display list so that the dependency sort will tend to
+        //  create similar output each pass
+        var children:Array = _scene.displayListChildren;
+
+        // Full naive cartesian scan, see what objects are behind/in front of child[ii]
+        var max:uint = children.length;
+        for (var ii :uint = 0; ii < max; ii++)
+        {
+            var objA:IsoDisplayObject = children[ii];
+
+            var rightA:Number = objA.x + objA.width;
+            var frontA:Number = objA.y + objA.length;
+            var topA:Number = objA.z + objA.height;
+
+            var prioA :int = objA is PriorityIsoDisplayObject ?
+                PriorityIsoDisplayObject(objA).getPriority() : 0;
+
+            for (var jj :uint = ii + 1; jj < max; jj++)
+            {
+                var objB:IsoDisplayObject = children[jj];
+
+                var prioB :int = objB is PriorityIsoDisplayObject ?
+                    PriorityIsoDisplayObject(objB).getPriority() : 0;
+
+                var rightB:Number = objB.x + objB.width;
+                var frontB:Number = objB.y + objB.length;
+                var topB:Number = objB.z + objB.height;
+
+                // See if B should go behind A and vice-versa.
+                var bBehindA :Boolean = ((objB.x < rightA) &&
+                                         (objB.y < frontA) &&
+                                         (objB.z < topA));
+                var aBehindB :Boolean = ((objA.x < rightB) &&
+                                         (objA.y < frontB) &&
+                                         (objA.z < topB));
+
+                if ((bBehindA && aBehindB)) {
+                    // Overlap means we need to use the priority...
+                    if (prioA > prioB) {
+                        addDependency(objA, objB);
+                    } else {
+                        addDependency(objB, objA);
+                    }
+                } else if (bBehindA) {
+                    addDependency(objA, objB);
+                } else if (aBehindB) {
+                    addDependency(objB, objA);
+                }
+                // Note - if we find that neither is behind the other, we don't add a dependency
+                //  ordering.  If they actually do visually overlap due to sticking outside their
+                //  bounds, this can sometimes cause inconsistent visuals.
+            }
+        }
+
+        //trace("dependency scan time", getTimer() - startTime, "ms");
+
+        // Set the childrens' depth, using dependency ordering
+        for each (var obj:IsoDisplayObject in children) {
+            if (!_visited[obj]) {
+                place(obj);
+            }
+        }
+
+        // Clear these out so we're not retaining memory between calls
+        _visited = null;
+        _dependencies = null;
+
+        //trace("scene layout render time", getTimer() - startTime, "ms (manual sort)");
+    }
+
+    /**
+     * Adds the front-to-back dependency to our map of all such dependencies.
+     */
+    protected function addDependency (front :IsoDisplayObject, back :IsoDisplayObject) :void
+    {
+        var deps :Array = _dependencies[front];
+        if (deps == null) {
+            deps = [];
+            _dependencies[front] = deps;
+        }
+        deps.push(back);
+    }
+
+    /**
+     * Dependency-ordered depth placement of the given objects and its dependencies.
+     */
+    protected function place (obj:IsoDisplayObject):void
+    {
+        _visited[obj] = true;
+
+        for each (var inner:IsoDisplayObject in _dependencies[obj]) {
+            if (!_visited[inner]) {
+                place(inner);
+            }
+        }
+
+        if (_depth != obj.depth)
+        {
+            _scene.setChildIndex(obj, _depth);
+        }
+        _depth++;
+    };
+
+    /** The depth we're currently placing children at. */
+    protected var _depth :uint;
+
+    /** Any objects we've already placed. */
+    protected var _visited :Dictionary;
+
+    /** The scene on which we're operating. */
+    protected var _scene :IIsoScene;
+
+    /** All the front-back dependencies we know about.  This maps an object to a list of all
+     * the objects that should be rendered behind (and therefore before) it. */
+    protected var _dependencies :Dictionary;
+}
+}

aslib/src/main/as/com/threerings/miso/client/PriorityIsoDisplayObject.as

@@ -0,0 +1,39 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+/**
+ * Any Iso object wishing to specify a render priority should do so by implementing this interface.
+ */
+public interface PriorityIsoDisplayObject
+{
+    /**
+     * Returns the render priority for the display object.
+     */
+    function getPriority () :int;
+
+    /**
+     * Returns whether the location on the object should register a hit if clicked.
+     */
+    function hitTest (stageX :int, stageY :int) :Boolean;
+}
+}

aslib/src/main/as/com/threerings/miso/client/SceneBlock.as

@@ -0,0 +1,300 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import as3isolib.display.scene.IsoScene;
+import as3isolib.display.IsoView;
+
+import com.threerings.util.Log;
+import com.threerings.util.MathUtil;
+import com.threerings.util.Set;
+import com.threerings.util.StringUtil;
+
+import com.threerings.media.tile.BaseTile;
+import com.threerings.media.tile.Colorizer;
+import com.threerings.media.tile.NoSuchTileSetError;
+import com.threerings.media.tile.Tile;
+import com.threerings.media.tile.TileSet;
+import com.threerings.media.tile.TileUtil;
+import com.threerings.miso.client.BaseTileIsoSprite;
+import com.threerings.miso.client.MisoScenePanel;
+import com.threerings.miso.client.ObjectTileIsoSprite;
+import com.threerings.miso.data.MisoSceneModel;
+import com.threerings.miso.data.ObjectInfo;
+import com.threerings.miso.util.MisoContext;
+import com.threerings.miso.util.MisoSceneMetrics;
+import com.threerings.miso.util.ObjectSet;
+
+public class SceneBlock
+{
+    private var log :Log = Log.getLog(SceneBlock);
+
+    public static const BLOCK_SIZE :int = 4;
+
+    public function SceneBlock (key :int, objScene :IsoScene, isoView :IsoView,
+        metrics :MisoSceneMetrics)
+    {
+        _key = key;
+        _objScene = objScene;
+        _isoView = isoView;
+        _metrics = metrics;
+    }
+
+    public function getKey () :int
+    {
+        return _key;
+    }
+
+    public static function getBlockKey (x :int, y :int) :int
+    {
+        return (MathUtil.floorDiv(x, BLOCK_SIZE) << 16 |
+            (MathUtil.floorDiv(y, BLOCK_SIZE) & 0xFFFF));
+    }
+
+    public static function getBlockX (key :int) :int
+    {
+        return (key >> 16) * BLOCK_SIZE;
+    }
+
+    public static function getBlockY (key :int) :int
+    {
+        // We really do mean to do this crazy shift left then back right thing to get our sign
+        //  back from before we encoded.
+        return (((key & 0xFFFF) * BLOCK_SIZE) << 16) >> 16;
+    }
+
+    /**
+     * Starts getting all the tiles for the block loaded up and ready to go.
+     */
+    public function resolve (ctx :MisoContext, model :MisoSceneModel, panel :MisoScenePanel,
+        completeCallback :Function) :void
+    {
+        _completeCallback = completeCallback;
+
+        var x :int = getBlockX(_key);
+        var y :int = getBlockY(_key);
+
+        _baseScene = new IsoScene();
+        _baseScene.layoutEnabled = false;
+        for (var ii :int = x; ii < x + BLOCK_SIZE; ii++) {
+            for (var jj :int = y; jj < y + BLOCK_SIZE; jj++) {
+                var tileId :int = model.getBaseTileId(ii, jj);
+                if (tileId <= 0) {
+                    var defSet :TileSet;
+                    try {
+                        var setId :int = model.getDefaultBaseTileSet();
+                        defSet = ctx.getTileManager().getTileSet(setId);
+                        tileId = TileUtil.getFQTileId(setId,
+                            TileUtil.getTileHash(ii, jj) % defSet.getTileCount());
+                    } catch (err :NoSuchTileSetError) {
+                        // Someone else already complained...
+                        continue;
+                    }
+                }
+
+                var tileSet :TileSet;
+                try {
+                    tileSet =
+                        ctx.getTileManager().getTileSet(TileUtil.getTileSetId(tileId));
+                } catch (err :NoSuchTileSetError) {
+                    // Someone else already complained...
+                    continue;
+                }
+
+                if (tileSet == null) {
+                    log.warning("TileManager returned null tilset: " +
+                        TileUtil.getTileSetId(tileId));
+                    continue;
+                }
+
+                createBaseSprite(tileSet, ii, jj, tileId, panel);
+            }
+        }
+
+        // And now grab the appropriate objects.
+        var set :ObjectSet = new ObjectSet();
+        model.getObjects(new Rectangle(x, y, BLOCK_SIZE, BLOCK_SIZE), set);
+        _objSprites = [];
+        for (ii = 0; ii < set.size(); ii++) {
+            var objInfo :ObjectInfo = set.get(ii);
+            var objTileId :int = objInfo.tileId;
+            var objTileSet :TileSet;
+            try {
+                objTileSet =
+                    ctx.getTileManager().getTileSet(TileUtil.getTileSetId(objTileId));
+            } catch (err :NoSuchTileSetError) {
+                // Someone else already complained...
+                continue;
+            }
+
+            if (objTileSet == null) {
+                log.warning("TileManager returned null TileSet: " +
+                    TileUtil.getTileSetId(objTileId));
+                continue;
+            }
+
+            createObjSprite(objTileSet, objInfo, panel);
+        }
+
+        maybeLoaded();
+    }
+
+    /**
+     * Actually adds all our tiles as sprites to the scenes.
+     */
+    public function render () :void
+    {
+        _isoView.addSceneAt(_baseScene, 0);
+        _baseScene.render();
+        for each (var sprite :ObjectTileIsoSprite in _objSprites) {
+            _objScene.addChild(sprite);
+        }
+    }
+
+    public function addToCovered (covered :Set) :void
+    {
+        for each (var sprite :ObjectTileIsoSprite in _objSprites) {
+            for (var xx :int = sprite.x; xx < sprite.x + sprite.width; xx++) {
+                for (var yy :int = sprite.y; yy < sprite.y + sprite.length; yy++) {
+                    covered.add(StringUtil.toCoordsString(xx, yy));
+                }
+            }
+        }
+    }
+
+    /**
+     * Removes our tiles' sprites from the scenes.
+     */
+    public function release () :void
+    {
+        _isoView.removeScene(_baseScene);
+
+        for each (var sprite :ObjectTileIsoSprite in _objSprites) {
+            _objScene.removeChild(sprite);
+        }
+    }
+
+    protected function createBaseSprite (tileSet :TileSet, x :int, y :int, tileId :int,
+        panel :MisoScenePanel) :void
+    {
+        var fringeTile :BaseTile = panel.computeFringeTile(x, y);
+
+        var tile :BaseTile = BaseTile(tileSet.getTile(TileUtil.getTileIndex(tileId)));
+
+        var bx :int = getBlockX(_key);
+        var by :int = getBlockY(_key);
+        _passable[(y - by) * BLOCK_SIZE + (x - bx)] =
+            tile.isPassable() && (fringeTile == null || fringeTile.isPassable());
+
+        if (tile.getImage() != null && (fringeTile == null || fringeTile.getImage() != null)) {
+            _baseScene.addChild(new BaseTileIsoSprite(x, y, tileId, tile, _metrics, fringeTile));
+        } else {
+            noteTileToLoad();
+
+            var maybeLoaded :Function = function (loaded :Tile) :void {
+                if (tile.getImage() != null &&
+                    (fringeTile == null || fringeTile.getImage() != null)) {
+                    _baseScene.addChild(new BaseTileIsoSprite(x, y, tileId, tile, _metrics,
+                        fringeTile));
+                    noteTileLoaded();
+                }
+            };
+
+            if (tile.getImage() == null) {
+                tile.notifyOnLoad(maybeLoaded);
+            }
+            if (fringeTile != null && fringeTile.getImage() == null) {
+                fringeTile.notifyOnLoad(maybeLoaded);
+            }
+        }
+    }
+
+    protected function createObjSprite (tileSet :TileSet, objInfo :ObjectInfo,
+        panel :MisoScenePanel) :void
+    {
+        var tile :Tile = tileSet.getTile(TileUtil.getTileIndex(objInfo.tileId),
+            panel.getColorizer(objInfo));
+
+        if (tile.getImage() != null) {
+            _objSprites.push(new ObjectTileIsoSprite(objInfo.x, objInfo.y, objInfo.tileId, tile,
+                objInfo.priority, _metrics));
+        } else {
+            noteTileToLoad();
+
+            tile.notifyOnLoad(function (tile :Tile) :void {
+                _objSprites.push(new ObjectTileIsoSprite(objInfo.x, objInfo.y, objInfo.tileId, tile,
+                    objInfo.priority, _metrics));
+                noteTileLoaded();
+            });
+        }
+    }
+
+    /**
+     * Returns whether the base & fringe tiles are traversable here.
+     */
+    public function canTraverseBase (traverser :Object, tx :int, ty :int) :Boolean
+    {
+        // Only handles the base tiles since the objects cross multiple scene blocks...
+        var bx :int = getBlockX(_key);
+        var by :int = getBlockY(_key);
+
+        return _passable[(ty - by) * BLOCK_SIZE + (tx - bx)];
+    }
+
+    protected function noteTileToLoad () :void
+    {
+        _pendingCt++;
+    }
+
+    protected function noteTileLoaded () :void
+    {
+        _pendingCt--;
+        maybeLoaded();
+    }
+
+    protected function maybeLoaded () :void
+    {
+        if (_pendingCt == 0) {
+            _completeCallback(this);
+            _completeCallback = null;
+        }
+    }
+
+    protected var _passable :Array = new Array(BLOCK_SIZE * BLOCK_SIZE);
+
+    protected var _baseScene :IsoScene;
+    protected var _objSprites :Array;
+
+    protected var _key :int;
+
+    protected var _completeCallback :Function;
+
+    protected var _pendingCt :int;
+
+    protected var _objScene :IsoScene;
+    protected var _isoView :IsoView;
+    protected var _metrics :MisoSceneMetrics;
+}
+}

aslib/src/main/as/com/threerings/miso/client/TileIsoSprite.as

@@ -0,0 +1,132 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.client {
+
+import flash.display.Bitmap;
+import flash.display.DisplayObject;
+
+import flash.geom.Point;
+
+import as3isolib.core.IsoDisplayObject;
+import as3isolib.display.IsoSprite;
+import as3isolib.display.primitive.IsoBox;
+import as3isolib.graphics.SolidColorFill;
+
+import com.threerings.media.tile.Tile;
+import com.threerings.media.tile.TileSet;
+import com.threerings.media.tile.TileUtil;
+import com.threerings.util.Log;
+import com.threerings.miso.util.MisoSceneMetrics;
+
+public class TileIsoSprite extends IsoSprite
+    implements PriorityIsoDisplayObject
+{
+    private static var log :Log = Log.getLog(TileIsoSprite);
+
+    public function TileIsoSprite (x :int, y :int, tileId :int, tile :Tile, priority :int,
+        metrics :MisoSceneMetrics, fringe :Tile = null)
+    {
+        _tileId = tileId;
+        _metrics = metrics;
+        _priority = priority;
+        _fringe = fringe;
+
+        layout(x, y, tile);
+
+        setSize(tile.getBaseWidth(), tile.getBaseHeight(), 1);
+
+        if (tile.getImage() == null) {
+            tile.notifyOnLoad(function() :void {
+                gotTileImage(tile);
+            });
+        } else {
+            gotTileImage(tile);
+        }
+    }
+
+    public function layout (x :int, y :int, tile :Tile) :void
+    {
+        moveTo(x, y, 0);
+    }
+
+    protected function gotTileImage (tile :Tile) :void
+    {
+        var image :DisplayObject = tile.getImage();
+        // as3isolib uses top instead of bottom.
+        image.x = -tile.getOriginX() + _metrics.tilewid *
+            ((tile.getBaseWidth() - tile.getBaseHeight())/2);
+        image.y = -tile.getOriginY() + _metrics.tilehei *
+            ((tile.getBaseWidth() + tile.getBaseHeight())/2);
+
+        if (_fringe == null) {
+            sprites = [image];
+        } else {
+            var fringeImg :DisplayObject = _fringe.getImage();
+            // as3isolib uses top instead of bottom.
+            fringeImg.x = -_fringe.getOriginX() + _metrics.tilewid *
+                ((_fringe.getBaseWidth() - _fringe.getBaseHeight())/2);
+            fringeImg.y = -_fringe.getOriginY() + _metrics.tilehei *
+                ((_fringe.getBaseWidth() + _fringe.getBaseHeight())/2);
+
+            sprites = [image, fringeImg];
+        }
+        render();
+    }
+
+    public function getPriority () :int
+    {
+        return _priority;
+    }
+
+    public function hitTest (stageX :int, stageY :int) :Boolean
+    {
+        if (sprites == null || sprites.length == 0) {
+            return false;
+        }
+
+        if (sprites[0] is Bitmap) {
+            if (!sprites[0].hitTestPoint(stageX, stageY, true)) {
+                // Doesn't even hit the bounds...
+                return false;
+            }
+            // Check the actual pixels...
+            var pt :Point = sprites[0].globalToLocal(new Point(stageX, stageY));
+            return Bitmap(sprites[0]).bitmapData.hitTest(new Point(0, 0), 0, pt);
+        } else {
+            return sprites[0].hitTestPoint(stageX, stageY, true);
+        }
+    }
+
+    public function toString () :String
+    {
+        return x + ", " + y + ": " + _tileId;
+    }
+
+    protected var _tileId :int;
+
+    protected var _priority :int;
+
+    protected var _fringe :Tile;
+
+    protected var _metrics :MisoSceneMetrics;
+}
+}

aslib/src/main/as/com/threerings/miso/data/MisoSceneModel.as

@@ -0,0 +1,106 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.data {
+
+import flash.geom.Rectangle;
+
+import com.threerings.miso.util.ObjectSet;
+import com.threerings.io.SimpleStreamableObject;
+import com.threerings.miso.data.MisoSceneModel;
+import com.threerings.io.ObjectInputStream;
+import com.threerings.miso.data.ObjectInfo;
+import com.threerings.util.ClassUtil;
+import com.threerings.util.Cloneable;
+import com.threerings.util.Set;
+import com.threerings.io.ObjectOutputStream;
+
+/**
+ * Contains basic information for a miso scene model that is shared among
+ * the specialized model implementations.
+ */
+public /*abstract*/ class MisoSceneModel extends SimpleStreamableObject
+    implements Cloneable
+{
+    public function clone () :Object
+    {
+        return (ClassUtil.newInstance(this) as MisoSceneModel);
+    }
+
+    /**
+     * Returns the fully qualified tile id of the base tile at the
+     * specified coordinates. <code>-1</code> will be returned if there is
+     * no tile at the specified coordinate.
+     */
+    public function getBaseTileId (x :int, y :int) :int
+    {
+        throw new Error("abstract");
+    }
+
+    public function setBaseTile (x :int, y :int, tileId :int) :Boolean
+    {
+        throw new Error("abstract");
+    }
+
+    public function setDefaultBaseTileSet (tileSetId :int) :void
+    {
+        // nothing doing
+    }
+
+    /**
+     * Scene models can return a default tileset to be used when no base
+     * tile data exists for a particular tile.
+     */
+    public function getDefaultBaseTileSet () :int
+    {
+        return 0;
+    }
+
+    /**
+     * Populates the supplied object set with info on all objects whose
+     * origin falls in the requested region.
+     */
+    public function getObjects (region :Rectangle, set :ObjectSet) :void
+    {
+        throw new Error("abstract");
+    }
+
+    public function addObject (info :ObjectInfo) :Boolean
+    {
+        throw new Error("abstract");
+    }
+
+    public function updateObject (info :ObjectInfo) :void
+    {
+        throw new Error("abstract");
+    }
+
+    public function removeObject (info :ObjectInfo) :Boolean
+    {
+        throw new Error("abstract");
+    }
+
+    public function getAllTilesets () :Set
+    {
+        throw new Error("abstract");
+    }
+}
+}

aslib/src/main/as/com/threerings/miso/data/ObjectInfo.as

@@ -0,0 +1,201 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.data {
+
+import com.threerings.util.Hashable;
+import com.threerings.util.ClassUtil;
+import com.threerings.util.Cloneable;
+import com.threerings.util.StringUtil;
+
+import com.threerings.io.SimpleStreamableObject;
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.ObjectOutputStream;
+
+import com.threerings.miso.data.ObjectInfo;
+import com.threerings.media.tile.TileUtil;
+
+/**
+ * Contains information about an object in a Miso scene.
+ */
+public class ObjectInfo extends SimpleStreamableObject
+    implements Cloneable, Hashable
+{
+    /** The fully qualified object tile id. */
+    public var tileId :int;
+
+    /** The x and y tile coordinates of the object. */
+    public var x :int;
+    public var y :int;
+
+    /** Don't access this directly unless you are serializing this
+     * instance. Use {@link #getPriority} instead. */
+    public var priority :int = 0;
+
+    /** The action associated with this object or null if it has no
+     * action. */
+    public var action :String;
+
+    /** A "spot" associated with this object (specified as an offset from
+     * the fine coordinates of the object's origin tile). */
+    public var sx :int;
+    public var sy :int;
+
+    /** The orientation of the "spot" associated with this object. */
+    public var sorient :int;
+
+    /** Up to two colorization assignments for this object. */
+    public var zations :int;
+
+    public function ObjectInfo (tileId :int = 0, x :int = 0, y :int = 0)
+    {
+        this.tileId = tileId;
+        this.x = x;
+        this.y = y;
+    }
+
+    public function hashCode () :int
+    {
+        return x ^ y ^ tileId;
+    }
+
+    public function clone () :Object
+    {
+        var info :ObjectInfo = (ClassUtil.newInstance(this) as ObjectInfo);
+        info.tileId = tileId;
+        info.x = x;
+        info.y = y;
+        info.priority = priority;
+        info.action = action;
+        info.sx = sx;
+        info.sy = sy;
+        info.sorient = sorient;
+        info.zations = zations;
+        return info;
+    }
+
+    public function equals (other :Object) :Boolean
+    {
+        if (other is ObjectInfo) {
+            var ooi :ObjectInfo = ObjectInfo(other);
+            return (x == ooi.x && y == ooi.y && tileId == ooi.tileId);
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Returns the render priority of this object tile.
+     */
+    public function getPriority () :int
+    {
+        return priority;
+    }
+
+    /**
+     * Returns the primary colorization assignment.
+     */
+    public function getPrimaryZation () :int
+    {
+        return (zations & 0xFF);
+    }
+
+    /**
+     * Returns the secondary colorization assignment.
+     */
+    public function getSecondaryZation () :int
+    {
+        return ((zations >> 16) & 0xFF);
+    }
+
+    /**
+     * Returns the tertiary colorization assignment.
+     */
+    public function getTertiaryZation () :int
+    {
+        return ((zations >> 24) & 0xFF);
+    }
+
+    /**
+     * Returns the quaternary colorization assignment.
+     */
+    public function getQuaternaryZation () :int
+    {
+        return ((zations >> 8) & 0xFF);
+    }
+
+    /**
+     * Sets the primary and secondary colorization assignments.
+     */
+    public function setZations (primary :int, secondary :int, tertiary :int, quaternary :int) :void
+    {
+        zations = (primary | (secondary << 16) | (tertiary << 24) | (quaternary << 8));
+    }
+
+    /**
+     * Returns true if this object info contains non-default data for
+     * anything other than the tile id and coordinates.
+     */
+    public function isInteresting () :Boolean
+    {
+        return (!StringUtil.isBlank(action) || priority != 0 ||
+                sx != 0 || sy != 0 || zations != 0);
+    }
+
+    /** Enhances our {@link SimpleStreamableObject#toString} output. */
+    public function tileIdToString () :String
+    {
+        return (TileUtil.getTileSetId(tileId) + ":" +
+                TileUtil.getTileIndex(tileId));
+    }
+
+    // from interface Streamable
+    override public function readObject (ins :ObjectInputStream) :void
+    {
+        super.readObject(ins);
+        tileId = ins.readInt();
+        x = ins.readInt();
+        y = ins.readInt();
+        priority = ins.readByte();
+        action = ins.readField(String);
+        sx = ins.readByte();
+        sy = ins.readByte();
+        sorient = ins.readByte();
+        zations = ins.readInt();
+    }
+
+    // from interface Streamable
+    override public function writeObject (out :ObjectOutputStream) :void
+    {
+        super.writeObject(out);
+        out.writeInt(tileId);
+        out.writeInt(x);
+        out.writeInt(y);
+        out.writeByte(priority);
+        out.writeField(action);
+        out.writeByte(sx);
+        out.writeByte(sy);
+        out.writeByte(sorient);
+        out.writeInt(zations);
+    }
+
+}
+}

aslib/src/main/as/com/threerings/miso/data/SparseMisoSceneModel.as

@@ -0,0 +1,263 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.data {
+
+import flash.geom.Rectangle;
+
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.SimpleStreamableObject;
+import com.threerings.io.ObjectOutputStream;
+
+import com.threerings.util.ArrayIterator;
+import com.threerings.util.ClassUtil;
+import com.threerings.util.Integer;
+import com.threerings.util.Iterator;
+import com.threerings.util.Joiner;
+import com.threerings.util.MathUtil;
+import com.threerings.util.Set;
+import com.threerings.util.Sets;
+import com.threerings.util.StreamableHashMap;
+import com.threerings.util.StringUtil;
+
+import com.threerings.miso.util.ObjectSet;
+import com.threerings.miso.data.MisoSceneModel;
+import com.threerings.miso.data.SparseMisoSceneModel;
+import com.threerings.miso.data.ObjectInfo;
+import com.threerings.miso.data.SparseMisoSceneModel_ObjectVisitor;
+import com.threerings.miso.data.SparseMisoSceneModel_Section;
+
+/**
+ * Contains miso scene data that is broken up into NxN tile sections.
+ */
+public class SparseMisoSceneModel extends MisoSceneModel
+{
+    public var swidth :int;
+    public var sheight :int;
+    /** The dimensions of a section of our scene. */
+
+    /** The tileset to use when we have no tile data. */
+    public var defTileSet :int = 0;
+
+    override public function clone () :Object
+    {
+        var model :SparseMisoSceneModel = (ClassUtil.newInstance(this) as SparseMisoSceneModel);
+        model._sections = new StreamableHashMap();
+        for (var iter :Iterator = getSections(); iter.hasNext(); ) {
+            var sect :SparseMisoSceneModel_Section = SparseMisoSceneModel_Section(iter.next());
+            model.setSection(SparseMisoSceneModel_Section(sect.clone()));
+        }
+        return model;
+    }
+
+    override public function getBaseTileId (col :int, row :int) :int
+    {
+        var sec :SparseMisoSceneModel_Section = getSection(col, row, false);
+        return (sec == null) ? -1 : sec.getBaseTileId(col, row);
+    }
+
+    override public function setBaseTile (fqBaseTileId :int, col :int, row :int) :Boolean
+    {
+        getSection(col, row, true).setBaseTile(col, row, fqBaseTileId);
+        return true;
+    }
+
+    override public function setDefaultBaseTileSet (tileSetId :int) :void
+    {
+        defTileSet = tileSetId;
+    }
+
+    override public function getDefaultBaseTileSet () :int
+    {
+        return defTileSet;
+    }
+
+    override public function getObjects (region :Rectangle, set :ObjectSet) :void
+    {
+        var minx :int = MathUtil.floorDiv(region.x, swidth)*swidth;
+        var maxx :int = MathUtil.floorDiv(region.x+region.width-1, swidth)*swidth;
+        var miny :int = MathUtil.floorDiv(region.y, sheight)*sheight;
+        var maxy :int = MathUtil.floorDiv(region.y+region.height-1, sheight)*sheight;
+        for (var yy :int = miny; yy <= maxy; yy += sheight) {
+            for (var xx :int = minx; xx <= maxx; xx += swidth) {
+                var sec :SparseMisoSceneModel_Section = getSection(xx, yy, false);
+                if (sec != null) {
+                    sec.getObjects(region, set);
+                }
+            }
+        }
+    }
+
+    override public function addObject (info :ObjectInfo) :Boolean
+    {
+        return getSection(info.x, info.y, true).addObject(info);
+    }
+
+    override public function updateObject (info :ObjectInfo) :void
+    {
+        // not efficient, but this is only done in editing situations
+        removeObject(info);
+        addObject(info);
+    }
+
+    override public function removeObject (info :ObjectInfo) :Boolean
+    {
+        var sec :SparseMisoSceneModel_Section = getSection(info.x, info.y, false);
+        if (sec != null) {
+            return sec.removeObject(info);
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Adds all interesting {@link ObjectInfo} records in this scene to
+     * the supplied list.
+     */
+    public function getInterestingObjects (list :Array) :void
+    {
+        for (var iter :Iterator = getSections(); iter.hasNext(); ) {
+            var sect :SparseMisoSceneModel_Section = SparseMisoSceneModel_Section(iter.next());
+            for each (var element :ObjectInfo in sect.objectInfo) {
+                list.add(element);
+            }
+        }
+    }
+
+    /**
+     * Don't call this method! This is only public so that the scene
+     * writer can generate XML from the raw scene data.
+     */
+    public function getSections () :Iterator
+    {
+        return new ArrayIterator(_sections.values());
+    }
+
+    /**
+     * Adds all {@link ObjectInfo} records in this scene to the supplied list.
+     */
+    public function getAllObjects (list :Array) :void
+    {
+        for (var iter :Iterator = getSections(); iter.hasNext(); ) {
+            iter.next().getAllObjects(list);
+        }
+    }
+
+    /**
+     * Informs the supplied visitor of each object in this scene.
+     *
+     * @param interestingOnly if true, only the interesting objects will
+     * be visited.
+     */
+    public function visitObjects (visitor :SparseMisoSceneModel_ObjectVisitor,
+        interestingOnly :Boolean = false) :void
+    {
+        for (var iter :Iterator = getSections(); iter.hasNext(); ) {
+            var sect :SparseMisoSceneModel_Section = SparseMisoSceneModel_Section(iter.next());
+            for each (var oinfo :ObjectInfo in sect.objectInfo) {
+                visitor.visit(oinfo);
+            }
+            if (!interestingOnly) {
+                for (var oo :int = 0; oo < sect.objectTileIds.length; oo++) {
+                    var info :ObjectInfo = new ObjectInfo(sect.objectTileIds[oo],
+                        sect.objectXs[oo], sect.objectYs[oo]);
+                    visitor.visit(info);
+                }
+            }
+        }
+    }
+
+    /**
+     * Don't call this method! This is only public so that the scene
+     * parser can construct a scene from raw data. If only Java supported
+     * class friendship.
+     */
+    public function setSection (section :SparseMisoSceneModel_Section) :void
+    {
+        _sections.put(key(section.x, section.y), section);
+    }
+
+    override public function getAllTilesets () :Set
+    {
+        var tilesets :Set = Sets.newSetOf(int);
+        for each (var section :SparseMisoSceneModel_Section in _sections.values()) {
+            section.getAllTilesets(tilesets);
+        }
+
+        tilesets.add(getDefaultBaseTileSet());
+
+        return tilesets;
+    }
+
+    // from interface Streamable
+    override public function readObject (ins :ObjectInputStream) :void
+    {
+        super.readObject(ins);
+        swidth = ins.readShort();
+        sheight = ins.readShort();
+        defTileSet = ins.readInt();
+        _sections = ins.readObject(StreamableHashMap);
+    }
+
+    // from interface Streamable
+    override public function writeObject (out :ObjectOutputStream) :void
+    {
+        super.writeObject(out);
+        out.writeShort(swidth);
+        out.writeShort(sheight);
+        out.writeInt(defTileSet);
+        out.writeObject(_sections);
+    }
+
+    override protected function toStringJoiner (j :Joiner) :void
+    {
+        super.toStringJoiner(j);
+        j.add("sections", StringUtil.toString(_sections.values()));
+    }
+
+    /**
+     * Returns the key for the specified section.
+     */
+    protected function key (x :int, y :int) :Integer
+    {
+        var sx :int = MathUtil.floorDiv(x, swidth);
+        var sy :int = MathUtil.floorDiv(y, sheight);
+        return Integer.valueOf((sx << 16) | (sy & 0xFFFF));
+    }
+
+    /** Returns the section for the specified tile coordinate. */
+    protected function getSection (x :int, y :int, create :Boolean) :SparseMisoSceneModel_Section
+    {
+        var key :Integer = key(x, y);
+        var sect :SparseMisoSceneModel_Section = _sections.get(key);
+        if (sect == null && create) {
+            var sx :int = MathUtil.floorDiv(x, swidth)*swidth;
+            var sy :int = MathUtil.floorDiv(y, sheight)*sheight;
+            _sections.put(key, sect = new SparseMisoSceneModel_Section(sx, sy, swidth, sheight));
+        }
+        return sect;
+    }
+
+    /** Contains our sections in row major order. */
+    protected var _sections :StreamableHashMap = new StreamableHashMap();
+
+}
+}

aslib/src/main/as/com/threerings/miso/data/SparseMisoSceneModel_ObjectVisitor.as

@@ -0,0 +1,29 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.data {
+
+public interface SparseMisoSceneModel_ObjectVisitor
+{
+    /** Called for each object in the scene, interesting and not. */
+    function visit (info :ObjectInfo) :void;
+}
+}

aslib/src/main/as/com/threerings/miso/data/SparseMisoSceneModel_Section.as

@@ -0,0 +1,287 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.data {
+
+import flash.geom.Rectangle;
+
+import com.threerings.io.ObjectOutputStream;
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.SimpleStreamableObject;
+import com.threerings.io.TypedArray;
+import com.threerings.media.tile.TileUtil;
+import com.threerings.miso.util.ObjectSet;
+import com.threerings.util.Arrays;
+import com.threerings.util.ClassUtil;
+import com.threerings.util.Cloneable;
+import com.threerings.util.Log;
+import com.threerings.util.Set;
+import com.threerings.util.StringUtil;
+
+public class SparseMisoSceneModel_Section extends SimpleStreamableObject
+    implements Cloneable
+{
+    /** The tile coordinate of our upper leftmost tile. */
+    public var x :int;
+    public var y :int;
+
+    /** The width of this section in tiles. */
+    public var width :int;
+
+    /** The combined tile ids (tile set id and tile id) for our
+     * section (in row major order). */
+    public var baseTileIds :TypedArray;
+
+    /** The combined tile ids (tile set id and tile id) of the
+     * "uninteresting" tiles in the object layer. */
+    public var objectTileIds :TypedArray = TypedArray.create(int);
+
+    /** The x coordinate of the "uninteresting" tiles in the object
+     * layer. */
+    public var objectXs :TypedArray = TypedArray.createShort();
+
+    /** The y coordinate of the "uninteresting" tiles in the object
+     * layer. */
+    public var objectYs :TypedArray = TypedArray.createShort();
+
+    /** Information records for the "interesting" objects in the
+     * object layer. */
+    public var objectInfo :TypedArray = TypedArray.create(ObjectInfo);
+
+    /**
+     * Creates a new scene section with the specified dimensions.
+     */
+    public function SparseMisoSceneModel_Section (
+        x :int = 0, y :int = 0, width :int = 0, height :int = 0)
+    {
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        baseTileIds = TypedArray.create(int, Arrays.create(width*height));
+    }
+
+    public function getBaseTileId (col :int, row :int) :int
+    {
+        if (col < x || col >= (x+width) || row < y || row >= (y+width)) {
+            log.warning("Requested bogus tile +" + col + "+" + row +
+                        " from " + this + ".");
+            return -1;
+        } else {
+            return baseTileIds[(row-y)*width+(col-x)];
+        }
+    }
+
+    public function setBaseTile (col :int, row :int, fqBaseTileId :int) :void
+    {
+        baseTileIds[(row-y)*width+(col-x)] = fqBaseTileId;
+    }
+
+    public function addObject (info :ObjectInfo) :Boolean
+    {
+        // sanity check: see if there is already an object of this
+        // type at these coordinates
+        var dupidx :int;
+        if ((dupidx = Arrays.indexOf(objectInfo, info)) != -1) {
+            log.warning("Refusing to add duplicate object [ninfo=" + info +
+			", oinfo=" + objectInfo[dupidx] + "].");
+            return false;
+        }
+        if ((dupidx = indexOfUn(info)) != -1) {
+            log.warning("Refusing to add duplicate object " +
+			"[info=" + info + "].");
+            return false;
+        }
+
+        if (info.isInteresting()) {
+            objectInfo = TypedArray(objectInfo.concat(info));
+        } else {
+            objectTileIds = TypedArray(objectTileIds.concat(info.tileId));
+            objectXs = TypedArray(objectXs.concat(info.x));
+            objectYs = TypedArray(objectYs.concat(info.y));
+        }
+        return true;
+    }
+
+    public function removeObject (info :ObjectInfo) :Boolean
+    {
+        // look for it in the interesting info array
+        var oidx :int = Arrays.indexOf(objectInfo, info);
+        if (oidx != -1) {
+            objectInfo = TypedArray(Arrays.splice(objectInfo, oidx, 1));
+            return true;
+        }
+
+        // look for it in the uninteresting arrays
+        oidx = indexOfUn(info);
+        if (oidx != -1) {
+            objectTileIds = TypedArray(Arrays.splice(objectTileIds, oidx, 1));
+            objectXs = TypedArray(Arrays.splice(objectXs, oidx, 1));
+            objectYs = TypedArray(Arrays.splice(objectYs, oidx, 1));
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Returns the index of the specified object in the uninteresting
+     * arrays or -1 if it is not in this section as an uninteresting
+     * object.
+     */
+    protected function indexOfUn (info :ObjectInfo) :int
+    {
+        for (var ii :int = 0; ii < objectTileIds.length; ii++) {
+            if (objectTileIds[ii] == info.tileId &&
+                objectXs[ii] == info.x && objectYs[ii] == info.y) {
+                return ii;
+            }
+        }
+        return -1;
+    }
+
+    public function getAllObjects (list :Array) :void
+    {
+        for each (var info :ObjectInfo in objectInfo) {
+            list.add(info);
+        }
+        for (var ii :int= 0; ii < objectTileIds.length; ii++) {
+            var x :int = objectXs[ii];
+            var y :int = objectYs[ii];
+            list.add(new ObjectInfo(objectTileIds[ii], x, y));
+        }
+    }
+
+    public function getObjects (region :Rectangle, set :ObjectSet) :void
+    {
+        // first look for intersecting interesting objects
+        for each (var info :ObjectInfo in objectInfo) {
+            if (region.contains(info.x, info.y)) {
+                set.insert(info);
+            }
+        }
+
+        // now look for intersecting non-interesting objects
+        for (var ii :int = 0; ii < objectTileIds.length; ii++) {
+            var x :int = objectXs[ii];
+            var y :int = objectYs[ii];
+            if (region.contains(x, y)) {
+                set.insert(new ObjectInfo(objectTileIds[ii], x, y));
+            }
+        }
+    }
+
+    /**
+     * Returns true if this section contains no data beyond the default.
+     * Used when saving a sparse scene: we omit blank sections.
+     */
+    public function isBlank () :Boolean
+    {
+        if ((objectTileIds.length != 0) || (objectInfo.length != 0)) {
+            return false;
+        }
+        for each (var baseTileId :int in baseTileIds) {
+            if (baseTileId != 0) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function clone () :Object
+    {
+        var section :SparseMisoSceneModel_Section =
+            (ClassUtil.newInstance(this) as SparseMisoSceneModel_Section);
+        section.x = x;
+        section.y = y;
+        section.width = width;
+        section.baseTileIds = TypedArray(Arrays.copyOf(baseTileIds));
+        section.objectTileIds = TypedArray(Arrays.copyOf(objectTileIds));
+        section.objectXs = TypedArray(Arrays.copyOf(objectXs));
+        section.objectYs = TypedArray(Arrays.copyOf(objectYs));
+        section.objectInfo = TypedArray.create(ObjectInfo);
+        for (var ii :int = 0; ii < objectInfo.length; ii++) {
+            section.objectInfo[ii] = objectInfo[ii].clone();
+        }
+        return section;
+    }
+
+    override public function toString () :String
+    {
+        if (width == 0 || baseTileIds == null) {
+            return "<no bounds>";
+        } else {
+            return width + "x" + (baseTileIds.length / width) + "+" + x + ":" + y + ":" +
+                objectInfo.length;
+        }
+    }
+
+    /**
+     * Adds all tilesets we reference to the set.
+     */
+    public function getAllTilesets (tilesets :Set) :void
+    {
+        for each (var base :int in baseTileIds) {
+            var baseSetId :int = TileUtil.getTileSetId(base);
+            if (baseSetId != 0) {
+                tilesets.add(baseSetId);
+            }
+        }
+        for each (var obj :int in objectTileIds) {
+            tilesets.add(TileUtil.getTileSetId(obj));
+        }
+
+        for each (var objInfo :ObjectInfo in objectInfo) {
+            tilesets.add(TileUtil.getTileSetId(objInfo.tileId));
+        }
+    }
+
+    // from interface Streamable
+    override public function readObject (ins :ObjectInputStream) :void
+    {
+        super.readObject(ins);
+        x = ins.readShort();
+        y = ins.readShort();
+        width = ins.readInt();
+        baseTileIds = ins.readField(TypedArray.getJavaType(int));
+        objectTileIds = ins.readField(TypedArray.getJavaType(int));
+        objectXs = ins.readField(TypedArray.getJavaShortType());
+        objectYs = ins.readField(TypedArray.getJavaShortType());
+        objectInfo = TypedArray(ins.readObject());
+    }
+
+    // from interface Streamable
+    override public function writeObject (out :ObjectOutputStream) :void
+    {
+        super.writeObject(out);
+        out.writeShort(x);
+        out.writeShort(y);
+        out.writeInt(width);
+        out.writeField(baseTileIds);
+        out.writeField(objectTileIds);
+        out.writeField(objectXs);
+        out.writeField(objectYs);
+        out.writeField(objectInfo);
+    }
+
+    private static const log :Log = Log.getLog(SparseMisoSceneModel_Section);
+}
+}

aslib/src/main/as/com/threerings/miso/data/VirtualMisoSceneModel.as

@@ -0,0 +1,56 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.data {
+
+import com.threerings.io.ObjectInputStream;
+import com.threerings.miso.data.ObjectInfo;
+import com.threerings.io.ObjectOutputStream;
+
+/**
+ * A convenient base class for "virtual" scenes which do not allow editing
+ * and compute the base and object tiles rather than obtain them from some
+ * data structure.
+ */
+public /*abstract*/ class VirtualMisoSceneModel extends MisoSceneModel
+{
+    override public function setBaseTile (arg1 :int, arg2 :int, arg3 :int) :Boolean
+    {
+        throw new Error("Unsupported");
+    }
+
+    override public function addObject (arg1 :ObjectInfo) :Boolean
+    {
+        throw new Error("Unsupported");
+    }
+
+    override public function updateObject (arg1 :ObjectInfo) :void
+    {
+        throw new Error("Unsupported");
+    }
+
+    override public function removeObject (arg1 :ObjectInfo) :Boolean
+    {
+        throw new Error("Unsupported");
+    }
+
+}
+}

aslib/src/main/as/com/threerings/miso/tile/AutoFringer.as

@@ -0,0 +1,474 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.tile {
+
+import flash.geom.Point;
+import flash.geom.Rectangle;
+
+import flash.display.Bitmap;
+import flash.display.BitmapData;
+
+import com.threerings.display.ImageUtil;
+import com.threerings.media.tile.NoSuchTileSetError;
+import com.threerings.media.tile.BaseTile;
+import com.threerings.media.tile.Tile;
+import com.threerings.media.tile.TileSet;
+import com.threerings.media.tile.TileManager;
+import com.threerings.media.tile.TileUtil;
+import com.threerings.util.Arrays;
+import com.threerings.util.Integer;
+import com.threerings.util.Log;
+import com.threerings.util.Maps;
+import com.threerings.util.Map;
+import com.threerings.util.Sets;
+import com.threerings.util.Set;
+import com.threerings.util.StringUtil;
+import com.threerings.util.WeakReference;
+import com.threerings.miso.data.MisoSceneModel;
+
+public class AutoFringer
+{
+    private var log :Log = Log.getLog(AutoFringer);
+
+    public function AutoFringer (fringeConf :FringeConfiguration, tMgr :TileManager)
+    {
+        _fringeConf = fringeConf;
+        _tMgr = tMgr;
+
+
+        // Construct the BITS_TO_INDEX array.
+        var initIdx :int;
+        // first clear everything to -1 (meaning there is no tile defined)
+        for (initIdx = 0; initIdx < INIT_CT; initIdx++) {
+            BITS_TO_INDEX[initIdx] = -1;
+        }
+
+        // then fill in with the defined tiles.
+        for (initIdx = 0; initIdx < FRINGETILES.length; initIdx++) {
+            BITS_TO_INDEX[FRINGETILES[initIdx]] = initIdx;
+        }
+
+    }
+
+    /**
+     * Returns the fringe configuration used by this fringer.
+     */
+    public function getFringeConf () :FringeConfiguration
+    {
+        return _fringeConf;
+    }
+
+    /**
+     * Returns all the tilesets that fringe on the specified tilesets.
+     */
+    public function getFringeSets (tilesets :Set) :Set
+    {
+        var fringeSets :Set = Sets.newSetOf(int);
+
+        tilesets.forEach(function(o :int) :void {
+            var fringes :Array = _fringeConf.getFringeSets(o);
+            if (fringes != null) {
+                for each (var fringe :int in fringes) {
+                    fringeSets.add(fringe);
+                }
+            }
+        });
+
+        return fringeSets;
+    }
+
+    /**
+     * Compute and return the fringe tile to be inserted at the specified location.
+     */
+    public function getFringeTile (scene :MisoSceneModel, col :int, row :int, fringes :Map,
+        masks :Map) :BaseTile
+    {
+        // get the tileset id of the base tile we are considering
+        var utid :int = scene.getBaseTileId(col, row);
+        var underset :int = adjustTileSetId((utid <= 0) ?
+            scene.getDefaultBaseTileSet() : (utid >> 16));
+
+        // start with a clean temporary fringer map
+        _fringers.clear();
+        var passable :Boolean = true;
+
+        // walk through our influence tiles
+        for (var y :int = row - 1, maxy :int = row + 2; y < maxy; y++) {
+            for (var x :int = col - 1, maxx :int = col + 2; x < maxx; x++) {
+                // we sensibly do not consider ourselves
+                if ((x == col) && (y == row)) {
+                    continue;
+                }
+
+                // determine the tileset for this tile
+                var btid :int= scene.getBaseTileId(x, y);
+                var baseset :int= adjustTileSetId((btid <= 0) ?
+                    scene.getDefaultBaseTileSet() : (btid >> 16));
+
+                // determine if it fringes on our tile
+                var pri :int = _fringeConf.fringesOn(baseset, underset);
+                if (pri == -1) {
+                    continue;
+                }
+
+                var fringer :FringerRec = FringerRec(_fringers.get(baseset));
+                if (fringer == null) {
+                    fringer = new FringerRec(baseset, pri);
+                    _fringers.put(baseset, fringer);
+                }
+
+                // now turn on the appropriate fringebits
+                fringer.bits |= FLAGMATRIX[y - row + 1][x - col + 1];
+
+                // See if a tile that fringes on us kills our passability,
+                // but don't count the default base tile against us, as
+                // we allow users to splash in the water.
+                if (passable && (btid > 0)) {
+                    try {
+                        var bt :BaseTile = BaseTile(_tMgr.getTile(btid));
+                        passable = bt.isPassable();
+                    } catch (nstse :NoSuchTileSetError) {
+                        log.warning("Autofringer couldn't find a base set while attempting to " +
+                            "figure passability", nstse);
+                    }
+                }
+            }
+        }
+
+        // if nothing fringed, we're done
+        var numfringers :int = _fringers.size();
+        if (numfringers == 0) {
+            return null;
+        }
+
+        // otherwise compose a FringeTile from the specified fringes
+        var frecs :Array = _fringers.values();
+
+        return composeFringeTile(frecs, fringes, TileUtil.getTileHash(col, row), passable, masks);
+    }
+
+    /**
+     * Compose a FringeTile out of the various fringe images needed.
+     */
+    protected function composeFringeTile (fringers :Array,
+        fringes :Map, hashValue :int, passable :Boolean, masks :Map) :FringeTile
+    {
+        // sort the array so that higher priority fringers get drawn first
+        Arrays.sort(fringers);
+
+        // Generate an identifier for the fringe tile being created as an array of the keys of its
+        // component tiles in the order they'll be drawn in the fringe tile.
+        var fringeIds :Array = [];
+        for each (var fringer :FringerRec in fringers) {
+            var indexes :Array = getFringeIndexes(fringer.bits);
+            var tsr :FringeTileSetRecord = _fringeConf.getFringe(fringer.baseset, hashValue);
+            var fringeset :int = tsr.fringe_tsid;
+            for each (var index :int in indexes) {
+                // Add a key for this tile as an int containing its base tile, the fringe set it's
+                // working with and the index used in that set.
+                fringeIds.push((fringer.baseset << 20) + (fringeset << 8) + index);
+            }
+        }
+        var frTile :FringeTile = new FringeTile(fringeIds, passable);
+
+        // If the fringes map contains something with the same fringe identifier, this will pull
+        // it out and we can use it instead.
+        var result :WeakReference = fringes.get(frTile);
+        if (result != null) {
+            var fringe :FringeTile = result.get();
+            if (fringe != null) {
+                return fringe;
+            }
+        }
+
+        // There's no fringe with the same identifier, so we need to create the tile.
+        var img :Bitmap = null;
+        getTileImageHelper1(img, hashValue, masks, fringers, 0, function (result :Bitmap) :void {
+                frTile.setImage(result);
+            });
+        fringes.put(frTile, new WeakReference(frTile));
+        return frTile;
+    }
+
+    protected function getTileImageHelper1 (img :Bitmap, hashValue :int, masks :Map,
+        fringers :Array, fringerIdx :int, callback :Function) :void
+    {
+        var fringer :FringerRec = fringers[fringerIdx];
+        var indexes :Array = getFringeIndexes(fringer.bits);
+        var tsr :FringeTileSetRecord = _fringeConf.getFringe(fringer.baseset, hashValue);
+        getTileImageHelper0(img, tsr, fringer.baseset, hashValue, masks, indexes, 0,
+            function (result :Bitmap) :void {
+                if (fringerIdx == fringers.length - 1) {
+                    callback(result);
+                } else {
+                    getTileImageHelper1(result, hashValue, masks, fringers, fringerIdx + 1,
+                        callback);
+                }
+            });
+    }
+
+    protected function getTileImageHelper0 (img :Bitmap, tsr :FringeTileSetRecord,
+        baseset :int, hashValue :int, masks :Map, indexes :Array,
+        indexIdx :int, callback :Function) :void
+    {
+        try {
+            getTileImage(img, tsr, baseset, indexes[indexIdx], hashValue, masks,
+                function (result :Bitmap) :void {
+                    if (indexIdx == indexes.length - 1) {
+                        callback(result);
+                    } else {
+                        getTileImageHelper0(result, tsr, baseset, hashValue, masks, indexes,
+                            indexIdx + 1, callback);
+                    }
+                });
+        } catch (nstse :NoSuchTileSetError) {
+            log.warning("Autofringer couldn't find a needed tileset", nstse);
+            callback(null);
+        }
+    }
+
+    /**
+     * Retrieve or compose an image for the specified fringe.
+     */
+    protected function getTileImage (img :Bitmap, tsr :FringeTileSetRecord ,
+        baseset :int, index :int, hashValue :int, masks :Map, callback :Function) :void
+    {
+
+        var fringeset :int = tsr.fringe_tsid;
+        var fset :TileSet = _tMgr.getTileSet(fringeset);
+        if (!tsr.mask) {
+            // oh good, this is easy
+            var stamp :Tile = fset.getTile(index);
+            if (stamp.getImage() != null) {
+                callback(stampTileImage(stamp, img, stamp.getWidth(), stamp.getHeight()));
+            } else {
+                stamp.notifyOnLoad(function(tile :Tile) :void {
+                    callback(stampTileImage(stamp, img, stamp.getWidth(), stamp.getHeight()));
+                });
+            }
+            return;
+        }
+
+        // otherwise, it's a mask..
+        var maskkey :int = (baseset << 20) + (fringeset << 8) + index;
+        var mask :Bitmap = masks.get(maskkey);
+        if (mask == null) {
+            _tMgr.getTileSet(fringeset).getTileImage(index, null, function (fsrc :Bitmap) :void {
+                _tMgr.getTileSet(baseset).getTileImage(0, null, function (bsrc :Bitmap) :void {
+                    mask = composeMaskedImage(fsrc, bsrc);
+                    masks.put(maskkey, mask);
+                    callback(stampTileImage(mask, img, mask.width, mask.height));
+                });
+            });
+
+        } else {
+            callback(stampTileImage(mask, img, mask.width, mask.height));
+        }
+    }
+
+
+
+    /**
+     * Create an image using the alpha channel from the first and the RGB values from the second.
+     */
+    public static function composeMaskedImage (mask :Bitmap, base :Bitmap) :Bitmap
+    {
+        var data :BitmapData = new BitmapData(base.width, base.height);
+        data.copyPixels(base.bitmapData, new Rectangle(0, 0, base.width, base.height),
+            new Point(0, 0), mask.bitmapData, new Point(0, 0), false);
+        return new Bitmap(data);
+    }
+
+    /** Helper function for {@link #getTileImage}. */
+    protected function stampTileImage (stamp :Object, ftimg :Bitmap, width :int,
+        height :int) :Bitmap
+    {
+        // create the target image if necessary
+        if (ftimg == null) {
+            ftimg = new Bitmap(new BitmapData(width, height, true, 0x00000000));
+        }
+        var img :Bitmap;
+        if (stamp is Tile) {
+            img = Bitmap((Tile(stamp)).getImage());
+        } else {
+            img = Bitmap(stamp);
+        }
+
+        ftimg.bitmapData.draw(img);
+
+        return ftimg;
+    }
+
+    /**
+     * Get the fringe index specified by the fringebits. If no index is available, try breaking
+     * down the bits into contiguous regions of bits and look for indexes for those.
+     */
+    protected function getFringeIndexes (bits :int) :Array
+    {
+        var index :int = BITS_TO_INDEX[bits];
+        if (index != -1) {
+            return [index];
+        }
+
+        // otherwise, split the bits into contiguous components
+
+        // look for a zero and start our first split
+        var start :int = 0;
+        while ((((1 << start) & bits) != 0) && (start < NUM_FRINGEBITS)) {
+            start++;
+        }
+
+        if (start == NUM_FRINGEBITS) {
+            // we never found an empty fringebit, and since index (above)
+            // was already -1, we have no fringe tile for these bits.. sad.
+            return new Array(0);
+        }
+
+        var indexes :Array = [];
+        var weebits :int = 0;
+        for (var ii :int = (start + 1) % NUM_FRINGEBITS; ii != start;
+             ii = (ii + 1) % NUM_FRINGEBITS) {
+
+            if (((1 << ii) & bits) != 0) {
+                weebits |= (1 << ii);
+            } else if (weebits != 0) {
+                index = BITS_TO_INDEX[weebits];
+                if (index != -1) {
+                    indexes.push(index);
+                }
+                weebits = 0;
+            }
+        }
+        if (weebits != 0) {
+            index = BITS_TO_INDEX[weebits];
+            if (index != -1) {
+                indexes.push(index);
+            }
+        }
+
+        return indexes;
+    }
+
+    /**
+     * Allow subclasses to apply arbitrary modifications to tileset ids for whatever nefarious
+     * purposes they may have.
+     */
+    protected function adjustTileSetId (tileSetId :int) :int
+    {
+        // by default, nothing.
+        return tileSetId;
+    }
+
+    // fringe bits
+    // see docs/miso/fringebits.png
+    //
+    protected static const NORTH     :int = 1 << 0;
+    protected static const NORTHEAST :int = 1 << 1;
+    protected static const EAST      :int = 1 << 2;
+    protected static const SOUTHEAST :int = 1 << 3;
+    protected static const SOUTH     :int = 1 << 4;
+    protected static const SOUTHWEST :int = 1 << 5;
+    protected static const WEST      :int = 1 << 6;
+    protected static const NORTHWEST :int = 1 << 7;
+
+    protected static const NUM_FRINGEBITS :int = 8;
+
+    // A matrix mapping adjacent tiles to which fringe bits they affect.
+    // (x and y are offset by +1, since we can't have -1 as an array index)
+    // again, see docs/miso/fringebits.png
+    //
+    protected static const FLAGMATRIX :Array= [
+        [ NORTHEAST, (NORTHEAST | EAST | SOUTHEAST), SOUTHEAST ],
+        [ (NORTHWEST | NORTH | NORTHEAST), 0, (SOUTHEAST | SOUTH | SOUTHWEST) ],
+        [ NORTHWEST, (NORTHWEST | WEST | SOUTHWEST), SOUTHWEST ]
+    ];
+
+    /**
+     * The fringe tiles we use. These are the 17 possible tiles made up of continuous fringebits
+     * sections. Huh? see docs/miso/fringebits.png
+     */
+    protected static const FRINGETILES :Array = [
+        SOUTHEAST,
+        SOUTHWEST | SOUTH | SOUTHEAST,
+        SOUTHWEST,
+        NORTHEAST | EAST | SOUTHEAST,
+        NORTHWEST | WEST | SOUTHWEST,
+        NORTHEAST,
+        NORTHWEST | NORTH | NORTHEAST,
+        NORTHWEST,
+
+        SOUTHWEST | WEST | NORTHWEST | NORTH | NORTHEAST,
+        NORTHWEST | NORTH | NORTHEAST | EAST | SOUTHEAST,
+        NORTHWEST | WEST | SOUTHWEST | SOUTH | SOUTHEAST,
+        SOUTHWEST | SOUTH | SOUTHEAST | EAST | NORTHEAST,
+
+        NORTHEAST | NORTH | NORTHWEST | WEST | SOUTHWEST | SOUTH | SOUTHEAST,
+        SOUTHEAST | EAST | NORTHEAST | NORTH | NORTHWEST | WEST | SOUTHWEST,
+        SOUTHWEST | SOUTH | SOUTHEAST | EAST | NORTHEAST | NORTH | NORTHWEST,
+        NORTHWEST | WEST | SOUTHWEST | SOUTH | SOUTHEAST | EAST | NORTHEAST,
+
+        // all the directions!
+        NORTH | NORTHEAST | EAST | SOUTHEAST | SOUTH | SOUTHWEST | WEST | NORTHWEST
+    ];
+
+    // A reverse map of the above array, for quickly looking up which tile
+    // we want.
+    protected const INIT_CT :int = (1 << NUM_FRINGEBITS);
+
+    protected const BITS_TO_INDEX :Array = new Array(INIT_CT);
+
+    protected var _tMgr :TileManager;
+    protected var _fringeConf :FringeConfiguration;
+    protected var _fringers :Map = Maps.newMapOf(int);
+}
+}
+
+import com.threerings.util.Comparable;
+
+/**
+ * A record for holding information about a particular fringe as we're computing what it will
+ * look like.
+ */
+class FringerRec
+    implements Comparable
+{
+    public var baseset :int;
+    public var priority :int;
+    public var bits :int;
+
+    public function FringerRec (base :int, pri :int)
+    {
+        baseset = base;
+        priority = pri;
+    }
+
+    public function compareTo (o :Object) :int
+    {
+        return priority - FringerRec(o).priority;
+    }
+
+    public function toString () :String
+    {
+        return "[base=" + baseset + ", pri=" + priority + ", bits="
+            + bits.toString(16) + "]";
+    }
+}

aslib/src/main/as/com/threerings/miso/tile/FringeConfiguration.as

@@ -0,0 +1,113 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.tile {
+
+import com.threerings.util.Map;
+import com.threerings.util.Maps;
+import com.threerings.media.tile.TileSetIdMap;
+
+/**
+ * Used to manage data about which base tilesets fringe on which others
+ * and how they fringe.
+ */
+public class FringeConfiguration
+{
+    public static function fromXml (xml :XML, idMap :TileSetIdMap) :FringeConfiguration
+    {
+        var config :FringeConfiguration = new FringeConfiguration();
+        for each (var baseXml :XML in xml.base) {
+            config.addFringeRecord(FringeRecord.fromXml(baseXml, idMap));
+        }
+        return config;
+    }
+
+    /**
+     * Adds a parsed FringeRecord to this instance. This is used when parsing
+     * the fringerecords from xml.
+     */
+    public function addFringeRecord (frec :FringeRecord) :void
+    {
+        _frecs.put(frec.base_tsid, frec);
+    }
+
+    /**
+     * If the first base tileset fringes upon the second, return the
+     * fringe priority of the first base tileset, otherwise return -1.
+     */
+    public function fringesOn (first :int, second :int) :int
+    {
+        // Short-circuit if we're fringing on ourselves.
+        if (first == second) {
+            return -1;
+        }
+
+        var f1 :FringeRecord = _frecs.get(first);
+
+        // we better have a fringe record for the first
+        if (null != f1) {
+
+            // it had better have some tilesets defined
+            if (f1.tilesets.length > 0) {
+
+                var f2 :FringeRecord = _frecs.get(second);
+
+                // and we only fringe if second doesn't exist or has a lower
+                // priority
+                if ((null == f2) || (f1.priority > f2.priority)) {
+                    return f1.priority;
+                }
+            }
+        }
+
+        return -1;
+    }
+
+    /**
+     * Get a random FringeTileSetRecord from amongst the ones
+     * listed for the specified base tileset.
+     */
+    public function getFringe (baseset :int, hashValue :int) :FringeTileSetRecord
+    {
+        var f :FringeRecord = _frecs.get(baseset);
+        return f.tilesets[hashValue % f.tilesets.length];
+    }
+
+    /**
+     * Returns all the tilesets used to fringe with this baseset.
+     */
+    public function getFringeSets (baseset :int) :Array
+    {
+        var f :FringeRecord = _frecs.get(baseset);
+        if (f == null) {
+            return [];
+        } else {
+            return f.tilesets.map(
+                function (element :FringeTileSetRecord, index:int, arr:Array) :int {
+                    return element.fringe_tsid;
+                });
+        }
+    }
+
+    /** The mapping from base tileset id to fringerecord. */
+    protected var _frecs :Map = Maps.newMapOf(int);
+}
+}

aslib/src/main/as/com/threerings/miso/tile/FringeRecord.as

@@ -0,0 +1,67 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.tile {
+
+import com.threerings.media.tile.TileSetIdMap;
+import com.threerings.util.StringUtil;
+
+public class FringeRecord
+{
+    /** The tileset id of the base tileset to which this applies. */
+    public var base_tsid :int;
+
+    /** The fringe priority of this base tileset. */
+    public var priority :int;
+
+    /** A list of the possible tilesets that can be used for fringing. */
+    public var tilesets :Array = [];
+
+    public static function fromXml (xml :XML, idMap :TileSetIdMap) :FringeRecord
+    {
+        var rec :FringeRecord = new FringeRecord();
+        rec.base_tsid = idMap.getTileSetId(xml.@name);
+        rec.priority = xml.@priority;
+        for each (var tsXml :XML in xml.tileset) {
+            rec.addTileset(FringeTileSetRecord.fromXml(tsXml, idMap));
+        }
+        return rec;
+    }
+
+    /** Used when parsing the tilesets definitions. */
+    public function addTileset (record :FringeTileSetRecord) :void
+    {
+        tilesets.push(record);
+    }
+
+    /** Did everything parse well? */
+    public function isValid () :Boolean
+    {
+        return ((base_tsid != 0) && (priority > 0));
+    }
+
+    public function toString () :String
+    {
+        return "[base_tsid=" + base_tsid + ", priority=" + priority +
+            ", tilesets=" + StringUtil.toString(tilesets) + "]";
+    }
+}
+}

aslib/src/main/as/com/threerings/miso/tile/FringeTile.as

@@ -0,0 +1,62 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.tile {
+
+import com.threerings.util.Arrays;
+import com.threerings.util.Hashable;
+
+import com.threerings.media.tile.BaseTile;
+
+public class FringeTile extends BaseTile
+    implements Hashable
+{
+    public function FringeTile (fringeIds :Array, passable :Boolean)
+    {
+        setPassable(passable);
+        _fringeIds = fringeIds;
+    }
+
+    public function equals (obj :Object) :Boolean
+    {
+        if (!(obj is FringeTile)) {
+            return false;
+        }
+        var fObj :FringeTile = FringeTile(obj);
+        return _passable == fObj._passable && Arrays.equals(_fringeIds, fObj._fringeIds);
+    }
+
+    public function hashCode () :int
+    {
+        var result :int = 33; // can't use Arrays.hashCode(long) as it's 1.5 only
+        for each (var key :int in _fringeIds) {
+            result = result * 37 + key;
+        }
+        if (_passable) {
+            result++;
+        }
+        return result;
+    }
+
+    /** The fringe keys of the tiles that went into this tile in the order they were drawn. */
+    protected var _fringeIds :Array;
+}
+}

aslib/src/main/as/com/threerings/miso/tile/FringeTileSetRecord.as

@@ -0,0 +1,55 @@
+//
+// $Id$
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.tile {
+
+import com.threerings.media.tile.TileSetIdMap;
+import com.threerings.util.XmlUtil;
+
+public class FringeTileSetRecord
+{
+    /** The tileset id of the fringe tileset. */
+    public var fringe_tsid :int;
+
+    /** Is this a mask? */
+    public var mask :Boolean;
+
+    public static function fromXml (xml :XML, idMap :TileSetIdMap) :FringeTileSetRecord
+    {
+        var rec :FringeTileSetRecord = new FringeTileSetRecord();
+        rec.fringe_tsid = idMap.getTileSetId(xml.@name);
+        rec.mask = XmlUtil.getBooleanAttr(xml, "mask", false);
+        return rec;
+    }
+
+    /** Did everything parse well? */
+    public function isValid () :Boolean
+    {
+        return (fringe_tsid != 0);
+    }
+
+    public function toString () :String
+    {
+        return "[fringe_tsid=" + fringe_tsid + ", mask=" + mask + "]";
+    }
+
+}
+}