guardian rssfeedsspamassassintaintorg url httpwwwnewsisfreecomclick46436947159 date 20020801t0904550100 feature excerpted wolfgang engels shaderx book wordware publishing presents simple shader trick performs good per pixel approximation noninteger power function technique works input values 0 1 supports large exponents presented shader require texture lookup scalable making possible spend instructions order decrease error reach greater exponents thu 26 sep 2002 152931 0000 noninteger power function pixel shader