Hi all, I'm having some difficulty setting up a GLSL lookup table shader with my osg program and am hoping for some help. I've looked at every opengl, glsl, osg and other forum posting I could find online and think I am pretty close to getting things working. I could put a ton of code here but I think I'll just ask one question and provide more code if need be:
Do I have to attach my lookup table (stored in an osg::Texture2d) to a simple rectangular geometry in order to be able to perform a GLSL texture2d method on it? Currently I am putting my lookup texture in texturecoordinate 1 of the object I am trying to apply my shader to. The reason I ask is that whenever I try to pull out a value from my lookup texture using a vec2 with values from 0.0-1.0 in my shader and perform any sort of operation using that value, the osg command line spits out: "Warning: detected OpenGL error 'invalid operation' at After Renderer::compile" ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=45515#45515 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
