Further tweak frustum culling to be more efficient

[libs/gl.git] / source / instancescene.cpp

diff --git a/source/instancescene.cpp b/source/instancescene.cpp
index fef3e9697e602051248bfe35f827078eac8a4117..b3a89f338a42cfff32500ccace3256e0b1e7727b 100644 (file)
--- a/source/instancescene.cpp
+++ b/source/instancescene.cpp
@@ -38,11 +38,19 @@ void InstanceScene::finish_frame() const
 
 void InstanceScene::render(Renderer &renderer, const Tag &tag) const
 {
-       setup_frustum(renderer);
-       for(InstanceMap::const_iterator i=renderables.begin(); i!=renderables.end(); ++i)
-               for(RenderableSet::const_iterator j=i->second.begin(); j!=i->second.end(); ++j)
-                       if(!frustum_cull(renderer, **j))
+       if(setup_frustum(renderer))
+       {
+               for(InstanceMap::const_iterator i=renderables.begin(); i!=renderables.end(); ++i)
+                       for(RenderableSet::const_iterator j=i->second.begin(); j!=i->second.end(); ++j)
+                               if(!frustum_cull(**j))
+                                       renderer.render(**j, tag);
+       }
+       else
+       {
+               for(InstanceMap::const_iterator i=renderables.begin(); i!=renderables.end(); ++i)
+                       for(RenderableSet::const_iterator j=i->second.begin(); j!=i->second.end(); ++j)
                                renderer.render(**j, tag);
+       }
 }
 
 } // namespace GL