Moved AmbulatorySprite around and made it implement the Traverser

interface.  Initial version of AStarPathUtil and hooked it in to
SceneView.getPath().  Not yet tested.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@255 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/client/Traverser.java

@@ -0,0 +1,23 @@
+//
+// $Id: Traverser.java,v 1.1 2001/08/15 02:30:27 shaper Exp $
+
+package com.threerings.miso.tile;
+
+/**
+ * The <code>Traverser</code> interface should be implemented by
+ * sprites that are going to traverse some path in a scene.  This
+ * allows path determination to take into account any special
+ * abilities the traverser may have that alter the traversability of
+ * tiles.
+ */
+public interface Traverser
+{
+    /**
+     * Return whether the traverser can traverse the specified tile.
+     *
+     * @param tile the tile to traverse.
+     *
+     * @return whether the tile is traversable.
+     */
+    public boolean canTraverse (Tile tile);
+}