KM_P3 498 ext/gd/libgd/gd_interpolation.c return(KM_P0+x*x*(KM_P2-x*KM_P3)); KM_P3 500 ext/gd/libgd/gd_interpolation.c return(KM_P0+x*x*(KM_P2+x*KM_P3));