Hey guys... I''ve got a little question that''s crashing my head from 2 weeks... Please, can you tell me how (if it''s possible) can i apply deformations on bitmaps/textures ? (as in Adope Photshop, Paint Shop Pro etc etc etc) Does exist some built-in functions in OGL that make it ? Thankyou in advance //------------- Making Funny Garbage Codes on http://members.xoom.it/NinjaCross

Hi again NinjaCross,

Try looking for information on using the Texture matrix (hardly anybody does stuff with it, as far as I know).

I give an example of it''s uses (and there are many more...):

Say you have a textured quad, and you want to shrink the texture along the y-axis by a factor of 2 (make it half as tall as it currently is). This can be done with these lines of code...

    void Render(){    // all this other code    ...    ...    glMatrixMode(GL_TEXTURE);   // Set current matrix to Texture Matrix    glScalef(1.0, 0.5, 1.0);    // Scale by factor of 0.5 along Y-axis    glMatrixMode(GL_MODELVIEW); // Set matrix mode back to modelview    DrawTexturedQuad();    ...    ...}    

Basically, the texture matrix is like any other matrix, and can have the same functions used on it (Rotate to... well, rotate the texture; Translate to move the texture; Scale... etc). Its pretty cool, really

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Thanyou so much BadMonkey, I gave me a big help !

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