Scaling & offsetting textures

[devdept]

Hi All,

Scaling and offsetting textures is very easy like below:


glTexCoord2d(offsetX + scaleX * U, offsetY + scaleY * V);
Is there a way to specify a scale and offset somewhere else and leave the glTexCoord2d() call like below:


glTexCoord2d(U, V);
so we don't need to recompile the object every time the user changes the texture scale?

Thanks,

Alberto

[ZbuffeR]

You can do that on the texture matrix.

[devdept]

Texture matrix, I've never heard about it. Where can I learn more?

Thanks,

Alberto

[ZbuffeR]

http://glprogramming.com/red/chapter09.html#name17

[devdept]

Ah, do you mean?


glMatrixMode(GL_TEXTURE); /* enter texture matrix mode */
glScaled(...);
glRotated(...);


Thanks,

Alberto

[ZbuffeR]

yes.