More work on object tiles. Revamped isometric scene rendering to

gather dirty sprites and objects and render after base and fringe tile
layers.  Add shadow tiles in the footprint of objects to make them
impassable.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@460 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/tools/xml/XMLSceneParser.java

@@ -1,5 +1,5 @@
 //
-// $Id: XMLSceneParser.java,v 1.18 2001/10/11 00:41:27 shaper Exp $
+// $Id: XMLSceneParser.java,v 1.19 2001/10/13 01:08:59 shaper Exp $
 
 package com.threerings.miso.scene.xml;
 
@@ -311,6 +311,9 @@ public class XMLSceneParser extends DefaultHandler
             // read the XML input stream and construct the scene object
 	    XMLUtil.parse(this, bis);
 
+            // place shadow tiles for any objects in the scene
+            _info.scene.prepareAllObjectTiles();
+
             // return the final scene object
             return _info.scene;