Make a few bits in the AS MisoScenePanel more extensible...

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@960 ed5b42cb-e716-0410-a449-f6a68f950b19

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

@@ -204,6 +204,11 @@ public class MisoScenePanel extends Sprite
         return blocks;
     }
 
+    protected function createSceneBlock (blockKey :int) :SceneBlock
+    {
+        return new SceneBlock(blockKey, _objScene, _isoView, _metrics);
+    }
+
     protected function refreshBaseBlockScenes () :void
     {
         _resStartTime = getTimer();
@@ -219,8 +224,7 @@ public class MisoScenePanel extends Sprite
 
         blocks.forEach(function(blockKey :int) :void {
             if (!_blocks.containsKey(blockKey)) {
-                var sceneBlock :SceneBlock =
+                var sceneBlock :SceneBlock = createSceneBlock(blockKey);
-                    new SceneBlock(blockKey, _objScene, _isoView, _metrics);
                 _pendingBlocks.add(sceneBlock);
                 sceneBlock.resolve(_ctx, _model, thisRef, blockResolved);
             }
@@ -228,7 +232,7 @@ public class MisoScenePanel extends Sprite
 
         _skipComplete = false;
 
-        
+
         if (_pendingBlocks.size() == 0) {
             resolutionComplete();
         }

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

@@ -142,7 +142,7 @@ public class SceneBlock
      */
     public function render () :void
     {
-        _isoView.addScene(_baseScene);
+        _isoView.addSceneAt(_baseScene, 0);
         _baseScene.render();
         for each (var sprite :ObjectTileIsoSprite in _objSprites) {
             _objScene.addChild(sprite);