MagickPI2        1095 magick/distort.c       coeff[0] = -MagickPI2;   /* -90, place at top! */
MagickPI2        1099 magick/distort.c         coeff[1] = MagickPI2;   /* zero arguments - center is at top */
MagickPI2        1737 magick/distort.c         for( a=(double) (ceil((double) ((coeff[0]-coeff[1]/2.0)/MagickPI2))*MagickPI2);
MagickPI2        1738 magick/distort.c                a<(coeff[0]+coeff[1]/2.0); a+=MagickPI2 ) {