[Apocalypse]

I recently started getting back into some OpenGL programming but I am hitting a snag along the way (the same snag I had last time I tried to do this). It appears as though I can't get an OpenGLView in one of my program's windows to behave properly. It will work with basic lighting and shapes but I am running into huge problems with depth and perspective. No shape will be drawn if it is outside a -1.0 to +1.0 range in each axis. I assume that this is a problem with default perspective yet any calls to "gluPerspective" render the OpenGLView black. Also, none of my shapes appear to "shrink" into the distance like they probably should when their leading edge and trailing edges are at different distances from the viewer.

Can anyone shed some light on this? I don't know what I can do and all the tutorials I have found work directly with glut and don't even use the cocoa elements I need for this to look right.

Thanks,
Jeff.

[bewebste]

It sounds like perhaps you're either not using the correct matrix stack or you're not loading an identity matrix before calling gluPerspective(). Your code for setting the perspective should look something like this:

glMatrixMode(GL_PROJECTION);
glLoadIdentity(); //important!
gluPerspective(foo, bar, baz, quux);

If you don't load the identity matrix before calling gluPerspective(), it will multiply whatever matrix is already present by the perspective matrix, giving you gibberish for a projection matrix. I've done this a couple times myself, and the result is usually a black screen like you're describing.