View Full Version : Per pixel evaluators

04-27-2001, 06:33 PM
OpenGL should have some form of material evaluation callback mechanism, to allow the use of true procedural textures, in 1, 2, 3 or even 4 dimensions.
Albeit this goes against the OpenGL fundation: hardware-oriented (since the evaluation whould be done in the client)
It can be really great to final rendering needs.

The client thus, should provide a callback function, receiving 1 2 3 or 4 scalars, and returning an rgba value.
And it should be able to register callbacks for different material properties (GL_AMBIENT,GL_DIFFUSE,etc.)

This would really extend the functionality of OpenGL, not being only so hardware-oriented, but a good tool where quality is more important than polygon throughput.

04-30-2001, 11:45 AM
If quality is more important than polygon throughput, feel free to write a renderer yourself. It isn't really that hard, and I'm sure there are plenty of open-source libraries around. You can even take Mesa and implement the callback yourself.