Added a visitor for geometry batches.

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@180 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/jme/util/BatchVisitor.java

@@ -0,0 +1,49 @@
+//
+// $Id: SpatialVisitor.java 158 2007-02-24 00:38:17Z mdb $
+//
+// Nenya library - tools for developing networked games
+// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/nenya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.jme.util;
+
+import com.jme.scene.Geometry;
+import com.jme.scene.batch.GeomBatch;
+
+/**
+ * Visits all of the {@link GeomBatch}es in a scene.
+ */
+public abstract class BatchVisitor extends SpatialVisitor<Geometry>
+{
+    public BatchVisitor ()
+    {
+        super(Geometry.class);
+    }
+
+    // documentation inherited from SpatialVisitor
+    protected void visit (Geometry geom)
+    {
+        for (int ii = 0, nn = geom.getBatchCount(); ii < nn; ii++) {
+            visit(geom.getBatch(ii));
+        }
+    }
+
+    /**
+     * Called once for each {@link GeomBatch} in the scene graph.
+     */
+    protected abstract void visit (GeomBatch batch);
+}