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3.1 Invariance

Consider a primitive obtained by translating a primitive p through an offset in window coordinates, where x and y are integers. As long as neither nor p is clipped, it must be the case that each fragment produced from is identical to a corresponding fragment f from p except that the center of is offset by from the center of f.

David Blythe
Sat Mar 29 02:23:21 PST 1997