Just some thoughts

[yoale]

Well, I was thinking about dot3 extension and had some ideas ;D. I thought it would be cool if there was a cross_product function. This could be used with dot3 for some cool shadings. The whole reason is it could be hardware accelerated, as the cross product is used alot in three-d apps (at least alot I know of).
Thinking of this, and realizing that alot of people use cool algorithms to produce special effects and shading--I wonder if the pixel shaders and vertex shaders will be able to be as fast as just hardcoding some realy useful algs into the graphics cards. http://www.opengl.org/discussion_boards/ubb/tongue.gif
Just my 2 cents worth, be as brutal as you want. http://www.opengl.org/discussion_boards/ubb/biggrin.gif

[bakery2k]

ARB_fragment_program has a XPD instruction to do a cross product.

[vincoof]

bakery2k: you're right but it's a bit heavy. A light extension like ARB_texture_env_cross_product (which looks like ARB_texture_env_dot3) would be easier to use and could probably be implemented on a wide range of hardware (whereas ARB_fragment_program can only be implemented on *elite* hardware)

[Korval]

The whole "texture_env" paradigm dies with OpenGL 1.0. That's fine; it was a hack anyway. There's no need to further the support for more "texture_env" hacks, when all the hardware that implements them also implement ARB_fragment_program.