Ok, so I found this: http://www.openscenegraph.org/projects/osg/wiki/Support/OpenGL2OSGLookup
So I am now doing this: Code: osg::ref_ptr<osg::LightModel> lightModel = new osg::LightModel; // http://www.glprogramming.com/red/chapter05.html // "OpenGL reverses the surface normals for back-facing polygons; typically, this means that the surface // normals of visible back- and front-facing polygons face the viewer, rather than pointing away. // As a result, all polygons are illuminated correctly. However, these additional operations usually make // two-sided lighting perform more slowly than the default one-sided lighting." lightModel->setTwoSided(true); // http://www.opengl.org/sdk/docs/man2/xhtml/glLightModel.xml // "GL_SINGLE_COLOR specifies that a single color is generated from the // lighting computation for a vertex. GL_SEPARATE_SPECULAR_COLOR // specifies that the specular color computation of lighting be stored // separately from the remainder of the lighting computation. The specular // color is summed into the generated fragment's color after the application // of texture mapping (if enabled). The initial value is GL_SINGLE_COLOR." lightModel->setColorControl(osg::LightModel::SINGLE_COLOR); // as of 2.9.9 this would be the default lightModel->setAmbientIntensity(osg::Vec4(0.2f,0.2f,0.2f,1.0f)); // http://www.glprogramming.com/red/chapter05.html // "A local viewpoint tends to yield more realistic results, but since the direction has to be calculated for each vertex, // overall performance is decreased with a local viewpoint. By default, an infinite viewpoint is assumed." lightModel->setLocalViewer(false); modelNode->getOrCreateStateSet()->setAttributeAndModes(lightModel.get()); Question: Am I missing something? What about glMaterialfv ( GL_FRONT_AND_BACK, ...) I read about somewhere else? For my model, something along those lines does not seem necessary. If someone is interested, the performance impact is as follows: before 4.75 FPS after 2.9 FPS (so it may be best to fix the model in the long run) ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53098#53098 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
