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Lutz

Perspective-ortho-hybrid?

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Hey, Simple question: Is it possible to have a hybrid transform matrix that does a projection in X-direction and an ortho transform in Y-direction? - Lutz

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It's not really possible to do it with a matrix alone, at least with the standard transformation pipeline. However, if you multiply the Y value by W after performing the perspective transform (in a vertex shader), it will nullify the homogeneous divide the hardware does afterward.

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Ahh, that was what I expected. Thanks for the confirmation.
I'll transform manually in the vertex shader. For this application, we're more fill rate limited than vertex limited, so some extra work for the vertex shader doesn't hurt.

Thanks, Lutz

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