Finished support for shadows. This is all some seriously complicated shit, but

the shadows sure look cool.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3740 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/cast/CompositedActionFrames.java

@@ -89,8 +89,7 @@ public class CompositedActionFrames
         CompositedMultiFrameImage cmfi =
             (CompositedMultiFrameImage)_frameCache.get(_key);
         if (cmfi == null) {
-            cmfi = new CompositedMultiFrameImage(
-                _imgr, _sources, _action, orient);
+            cmfi = createFrames(orient);
             _frameCache.put(new CompositedFramesKey(orient), cmfi);
         }
         return cmfi;
@@ -118,6 +117,14 @@ public class CompositedActionFrames
         throw new RuntimeException("What you talkin' about Willis?");
     }
 
+    /**
+     * Creates our underlying multi-frame image for a particular orientation.
+     */
+    protected CompositedMultiFrameImage createFrames (int orient)
+    {
+        return new CompositedMultiFrameImage(_imgr, _sources, _action, orient);
+    }
+
     /** Used to cache composited frames for a particular action and
      * orientation. */
     protected class CompositedFramesKey