Moved much of the IsoSceneView data into the IsoSceneModel. More work

on sprites and animation.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@138 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/util/LineSegmentPath.java

@@ -0,0 +1,93 @@
+//
+// $Id: LineSegmentPath.java,v 1.1 2001/08/02 00:42:02 shaper Exp $
+
+package com.threerings.miso.sprite;
+
+import java.util.ArrayList;
+import java.util.Enumeration;
+
+/**
+ * The Path class represents the path a sprite follows while
+ * meandering about the screen.  There must be at least two nodes in
+ * any worthwhile path.
+ */
+public class Path
+{
+    /** The number of distinct directions. */
+    public static final int NUM_DIRECTIONS = 8;
+
+    /** Direction constants. */
+    public static final int DIR_SOUTH = 0;
+    public static final int DIR_SOUTHWEST = 1;
+    public static final int DIR_WEST = 2;
+    public static final int DIR_NORTHWEST = 3;
+    public static final int DIR_NORTH = 4;
+    public static final int DIR_NORTHEAST = 5;
+    public static final int DIR_EAST = 6;
+    public static final int DIR_SOUTHEAST = 7;
+
+    /**
+     * Construct a Path object.
+     */
+    public Path ()
+    {
+        _nodes = new ArrayList();
+    }
+
+    /**
+     * 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 void addNode (int x, int y, int dir)
+    {
+        _nodes.add(new PathNode(x, y, dir));
+    }
+
+    /**
+     * Return an enumeration of the PathNode objects in this path. 
+     */
+    public Enumeration elements ()
+    {
+        return new Enumerator(_nodes);
+    }
+
+    /**
+     * Return the number of nodes in the path.
+     */
+    public int size ()
+    {
+        return _nodes.size();
+    }
+
+    /**
+     * Internal class that provides enumeration functionality for the path.
+     */
+    class Enumerator implements Enumeration
+    {
+        public Enumerator (ArrayList nodes)
+        {
+            _nodes = nodes;
+            _idx = 0;
+        }
+
+        public boolean hasMoreElements()
+        {
+            return (_idx < _nodes.size());
+        }
+
+        public Object nextElement ()
+        {
+            return _nodes.get(_idx++);
+        }
+
+        protected ArrayList _nodes;
+        protected int _idx;
+    }
+
+    /** The nodes that make up the path. */
+    protected ArrayList _nodes;
+}