Changeset 11204 for OpenSceneGraph/trunk/include/osgUtil/Optimizer

Timestamp:

03/11/10 19:15:20 (3 years ago)

Author:

robert

Message:

From Time Moore, "This submission implements 3 optimizations for meshes. INDEX_MESH turns DrawArrays? style geometry into DrawElements?, uniquifying the vertices in the process. This is useful for certain loaders, like ac3d, which just spit out DrawArrays?. VERTEX_POSTTRANSFORM and VERTEX_PRETRANSFORM optimize mesh triangle and vertex order for the caches on a modern GPU, using Tom Forsyth's algorithm. I describe this and the big difference it makes (38% improvement on a very large mesh) in my blog,
http://shiny-dynamics.blogspot.com/2010/03/vertex-cache-optimization-for-osg.html."

Files:

• OpenSceneGraph/trunk/include/osgUtil/Optimizer (modified) (1 diff)

OpenSceneGraph/trunk/include/osgUtil/Optimizer

@@ -86 +86 @@
             STATIC_OBJECT_DETECTION =   (1 << 16),
             FLATTEN_STATIC_TRANSFORMS_DUPLICATING_SHARED_SUBGRAPHS = (1 << 17),
+            INDEX_MESH =                (1 << 18),
+            VERTEX_POSTTRANSFORM =      (1 << 19),
+            VERTEX_PRETRANSFORM =       (1 << 20),
             DEFAULT_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS |
                                 REMOVE_REDUNDANT_NODES |