I'm using osgDB::readNodeFile() to load 3DS files, adding them to the root Group node of my osgUtil::SceneView, and then rendering them in a 3rd party OpenGL program. Everything works great with the files loaded and added to the scene graph before the first rendering pass when I call update(), cull(), and draw().
The problem is that I also have a separate networking thread which services requests to add new models to the scene graph. Although the new 3DS files seem to load correctly, they are never rendered in the scene. The problem appears to be related to per-vertex normal shading in lib3ds ReaderWriter3DS.cpp. When I build OSG with _usePerVertexNormals == false, the new models are visible. But with
_usePerVertexNormals == true (the default setting in the distribution), the new models are not visible. Models
loaded before my first frame are always visible in both cases.
I'd obviously like to use the per-vertex normal shading because it looks better. Any idea what's causing this or how I could work around it?
Thanks,
Jer
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