Hi, I have recently updated to Kubuntu 13.04 (from Kubuntu 12.04) and have experienced some problems with non-visible nodes in OSG. Many of my nodes using complex shaders work just as before, however some simple geometries such as tetrahedra and triangulated surfaces are no longer visible. I note that they are present in the scene graph because I can still pick (with polytope intersector) them.
The upgraded machine is a laptop with an AMD Mobility Radeon 5850. Everything worked perfectly before upgrading from 12.04. I still have a desktop running Kubuntu 12.04 with an Nvidia card and the same code base works perfectly. I have tried OSG 3.1.6, 3.1.7 and 3.1.9 and all have the same problem on the 13.04/AMD machine. Rather than post code snippets, I have attached a simple sample program that displays the cow using a basic shader. On the 12.04/Nvidia machine I see a plain white cow (no lighting). On the 13.04/AMD machine I see nothing at all. This is consistent with the experience in my full application. A log using "export OSGNOTIFYLEVEL=DEBUG" is also attached. I have never seen any errors, just nothing is displayed. On the AMD machine I have tried the open-source driver, fglrx and fglrx-updates, all with the same results. If I run osgviewer cow.osg, then the cow is displayed as expected indicating the FFP works, it is a problem when using shaders. The problem seems to be associated with using setUseModelViewAndProjectionUniforms / setUseVertexAttributeAliasing. Also, there seems to be a correlation between setting normals in the geometry and not being visible. My working nodes don't use normals. Thanks in advance for your help! Cheers, Roland ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=55209#55209 Attachments: http://forum.openscenegraph.org//files/log_104.txt http://forum.openscenegraph.org//files/osgtest_189.cpp _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
