I’m trying to do some multi texture blending and I’m getting an OpenGL “invalid value” error for some reason that I can’t figure out. I’ve tracked it down to if I set the GL_RGB_SCALE_ARB parameter (via the osg::TexEnvCombine::setScale_RGB function) to anything other than 1.0 then the RenderStage::drawInner() function will print the error message:
Warning: detected OpenGL error ‘invalid value’ after RenderBin::draw() Any idea why this would happen? The funny thing is that it seems to render fine – modifying the rgb scale has the desired effect of brightening or darkening the two textures that I’m blending via modulate, but I’m just wondering if that error is something I should worry about. Thanks. Alex .... After further investigation I've found that I can set the rgb scale to either 1.0 or 2.0 without getting an error... which really only confuses me more. .... OK never mind, I found this in the OpenGL documentation: GL_INVALID_VALUE is generated if the params value for GL_RGB_SCALE or GL_ALPHA_SCALE are not one of 1.0, 2.0, or 4.0 I guess that's my problem. ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12142#12142 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
