Hi! I want to do some 3d-clipping. Basically I know how to do that, but I don''t know exactly how to create the frustum from the given parameters (aspect ratio, fov, nearplane). Can anyone tell me where I can find information on how to build the frustum? Or does anyone know how to do that? The construction seems to involve quite a bit of trigonometry. Thanks cu LaBasX2

For aspect ratio and fov, near and back clipping plane, use gluPerspective(...)

For defining the clipping plane individually, use glFrustrum(...)

Yes, I know how to set up a frustum in OpenGL.
But I need to calculate the planes so that I can cull spheres
or bounding-boxes.

I don''t know how to combine the fov and the aspect ratio.

Can someone please help me?

Thanks

faq http://www.frii.com/~martz/oglfaq/ IIRC clipping culkling

Thanks for your replies!