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Premultiplying in OpenGL and Rotation

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I'm currently learning OpenGL and i'm trying to rotate an object in a fixed coordinate system. I have been reading that I have to pre-multiply and that OpenGL post-multiplies. But I'm just having a little difficulty visualizing the concept. My code looks something like... glTranslatef( 0, 0, -6 ); glRotatef( rotateX, 1, 0, 0 ); glRotatef( rotateY, 0, 1, 0 ); DrawObject(); Can anyone help me out? Some psuedo-code would be appreciated. Thanks in advance. :)

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