Legacy ImageMagick Discussions Archive

Hello,
This is my code,
const double ctrlPts[8] = {125,200 ,150,150, 255,150, 150, 150};
const size_t q = 8;
MagickDistortImage(magick_wand, ShepardsDistortion , q, ctrlPts, MagickFalse);

I want to move selected point on the image, but this code is moving entire image. Can anyone help me ...