Hey, hello. I am learning a little of WebGL (OpenGL ES 2.0) through the http://learningwebgl.com tutorials, but it uses a third party library to create the View, Projection and transformation matrices (glutils.js). Well, I don't really like the idea of depending on a non standard library, so I am trying to learn how to create these matrices by myself.
I've already managed to understand most of it, and although I can't really tell why these matrices work if someone asks me, at least I know how to build them when I need to. Now I have my own lib to work with 4x4 matrices. I can create translation, scale, rotation and the lookAt matrix, but, I am having a hard time finding out how to create the perspective matrix. Anyone could help me out?
Here is my lib: http://pastebin.com/csMi9GuC