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Shmuel

OpenGL How to display only part of texture

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I'm porting my engine's renderer from SDL to OpenGL. In SDL, I would use srcrect in the SDL_BlitSurface function and could specify what part of image to blit. How would I do this with OpenGL? I only want to have one texture for all of the tiles.

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You'll just need to change the texture coords you pass ogl. For example if you have a textured quad and you want to display one quarter of the texture you could have the texture coords for the 4 verts of the quad run from 0 to 0.5. You'll want to look at glTexCoord and glTexCoordPointer for details.

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