How to do texture modification

Question

I am working on iphone opengl es. I am a newbie to this. Can any one guide me how to proceed..

Answer 1

I would suggest you start with Apple's example code. The GLSprite example might be a good place to start.

For general Open GL programming, the red book is a great learning guide as well.

Answer 2

First, start with: Apple - Drawing with OpenGL ES. Then GLSprite and The Red Book.

After that, these are very handy: Lessens from Molecules, Apple Technical notes and Khronos - OpenGL ES Reference.