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Screen coordinates

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hi how to get screen coordinates from world coordinates using d3drm. i am having an old code in d3drm in which i have to modify some function. here i have to get screen coordinates from world. how to do this using d3drm. pls help me

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I'm not at all familiar with how retained mode works, but normally screen coordinates are calculated by transforming the world space position by both the view matrix and the projection matrix.

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