How to check if an object lies outside the clipping volume in OpenGL?

Question

I\'m really confused about OpenGL\'s modelview transformation. I understand all the transformation processes, but when it comes to projection matrix, I\'m lost :(

If

Answer 1

To determine if a given point will be visible on the screen, you test it against the viewing frustum. See this frustum culling tutorial:

http://www.lighthouse3d.com/tutorials/view-frustum-culling/