Hello Ricardo, On 12/13/2011 04:29 AM, Ricardo Schrumpf wrote: > many thanks for the quick response. I've created a small program, which > demonstrates the problem. It creates a plane and seven texture > coordinate units with the same values. Now you can switch between using > the texture units by pressing 0 to 7.
thanks for the program. I can reproduce the problem. It is not an OpenSG problem, but an OpenGL limitation (or rather hardware limitation), see below. > Assigning the texturunits 0, 1, 2, > 3 to a texturechunk works fine. But if i assign one of the other > textureunits, the result is weird. I see no texture anymore, only the > standard material of the plane. On the machine I tested on (NVidia GTX 8800) GL_MAX_TEXTURE_UNITS = 4, so for the fixed function pipeline you can only make use of texture units 0 to 3, I'm guessing your hardware has the same limitation. The same card also has GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS = 32, which means you could have up to 32 textures bound and access them from shaders, but with fixed function you are limited to 4. There is also an (old) thread on the OpenGL forums: http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showthreaded&Number=164763 Cheers, Carsten ------------------------------------------------------------------------------ Systems Optimization Self Assessment Improve efficiency and utilization of IT resources. Drive out cost and improve service delivery. Take 5 minutes to use this Systems Optimization Self Assessment. http://www.accelacomm.com/jaw/sdnl/114/51450054/ _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
