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View Full Version : glGet macros allways return zero -- even at start



TallTanBarbie
05-03-2011, 06:52 PM
Hello...I'm trying to use the GLM routines in my own OpenGL program. I can compile and link everything OK but when trying to load an OBJ Wavefront 3D model with textures the program crashes when trying to load an image--the debug sequence reports that the max texture size is zero.

glGetIntegerfv(glGetIntegerv(GL_MAX_TEXTURE_SIZE) or glGet anything is ALWAYS returning zero for ANY parameter -- even at program start. I'd like to be able to use textures so if you have any suggestions, please let me know. If I run the example program (it's in C not C++ as my program is) glGet(GL_MAX_TEXTURE_SIZE) works OK and gives a value of 32768.

I'm using the version of GLM from here:
http://devernay.free.fr/hacks/glm/

Dark Photon
05-03-2011, 06:54 PM
Sounds like you haven't created an OpenGL context yet.

Just for testing, try this first. Then do your glGets:



glutInit( &argc, argv );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH | GLUT_RGB );
glutCreateWindow( "window title" );

TallTanBarbie
05-04-2011, 10:03 AM
Yep, that's what it was...I was trying to load all the 3D model files first -- before glutInit. I knew it was something simple -- I need to have Occam's Razor burned on my forhead--thanks :0)