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Thomas Alton
01-12-2009, 12:29 PM
I have a texture containing different gradients of red and blue.

Is it possible to apply this texture to a quad but change the red colors to yellow and blue colors to black?

dletozeun
01-12-2009, 12:52 PM
You can do it using a fragment shader or in in your program before giving texture data to opengl.

Thomas Alton
01-12-2009, 01:40 PM
Thanks for your reply.

Do you know of any tutorials on how to do this using fragment shaders?

dletozeun
01-12-2009, 01:51 PM
Yes, there is a good one here (http://www.lighthouse3d.com/opengl/glsl/) to start with glsl. Enjoy! :)