Added code for writing a simple miso scene model to JSON.

Wow, writing to JSON is way simpler than writing to HTML. Too bad JSON wasn't
around and popular twelve years ago.

tools/pom.xml

@@ -33,6 +33,11 @@
       <artifactId>xml-writer</artifactId>
       <version>0.2</version>
     </dependency>
+    <dependency>
+      <groupId>com.googlecode.playn</groupId>
+      <artifactId>playn-core</artifactId>
+      <version>1.5.1</version>
+    </dependency>
 
     <!-- test/build dependencies -->
     <dependency>

tools/src/main/java/com/threerings/miso/tools/json/SimpleMisoSceneWriter.java

@@ -0,0 +1,72 @@
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2013 Three Rings Design, Inc., All Rights Reserved
+// https://github.com/threerings/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.tools.json;
+
+import com.threerings.miso.data.ObjectInfo;
+import com.threerings.miso.data.SimpleMisoSceneModel;
+
+import playn.core.Json;
+
+/**
+ * Writes a simple miso scene to JSON format.
+ */
+public class SimpleMisoSceneWriter
+{
+    /** The element used to enclose scene models written with this writer. */
+    public static final String OUTER_ELEMENT = "miso";
+
+    /** Writes {@code model} to {@code out}. */
+    public static void write (SimpleMisoSceneModel model, Json.Writer out) {
+        out.object(); // outer
+        out.value("width", model.width);
+        out.value("height", model.height);
+        out.value("viewwidth", model.vwidth);
+        out.value("viewheight", model.vheight);
+
+        out.array("base");
+        for (int tileId : model.baseTileIds) out.value(tileId);
+        out.end();
+
+        out.array("objects");
+        for (int ii = 0; ii < model.objectTileIds.length; ii++) {
+            out.object();
+            out.value("tileId", model.objectTileIds[ii]);
+            out.value("x", model.objectXs[ii]);
+            out.value("y", model.objectYs[ii]);
+            out.end();
+        }
+        for (ObjectInfo info : model.objectInfo) {
+            out.object();
+            out.value("tileId", info.tileId);
+            out.value("x", info.x);
+            out.value("y", info.y);
+            if (info.action != null) out.value("action", info.action);
+            if (info.priority != 0) out.value("priority", info.priority);
+            if (info.sx != 0 || info.sy != 0) {
+                out.value("sx", info.sx);
+                out.value("sy", info.sy);
+                out.value("sorient", info.sorient);
+            }
+            if (info.zations != 0) out.value("zations", info.zations);
+        }
+        out.end(); // objects
+        out.end(); // outer
+    }
+}