Formula for a orthogonal projection matrix?

Question

I've been looking around a bit and can't seem to find just what I"m looking for. I've found "canonical formulas," but what's the best way to use these? Do I have to scale every single vertex down? Or is there a better way?

A formula would really help me out, but I'm also looking for an explanation about the near and far z planes relative the viewer's position

Answer 1

Have a look at OpenGL. It does not answer your question, but it provides a lot of functionality for mapping.

Answer 2

• http://mathworld.wolfram.com/OrthogonalProjection.html

• http://nptel.iitm.ac.in/courses/Webcourse-contents/IIT-KANPUR/mathematics-2/node51.html