Approximation Techniques for High Performance Texture Mapping

Abstract

Accurate perspective mapping in real-time requires costly division operations per pixel and therefore ap­ proximation techniques are often employed. These per­ mit the mapping to be performed by interpolation, but generally with a significant set-up cost for the computa­ tion ofthe parameters. An efficient approximation tech­ nique which achieves good results with modest set-up requirements is presented. The technique uses Cheby­ shev control points to minimise errors.