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Transformation matrix to transform objects from NDC coordinates to screen coordinates (viewport transform) → Read more...
One matrix transformation in the 3D to a 2D transformation pipeline is the viewport transform where objects are transformed from normalized device coordinates (NDC) to screen coordinates (SC).
In short it’s the transformation of numbers in the range [-1, 1] to numbers corresponding to pixels on the screen, which is a linear mapping computed with linear interpolation.
In this article I cover the math behind the generation of the viewport transformation matrix.