setSkew method
Sets Matrix to skew by kx and ky, about a pivot point at (px, py). The pivot point is unchanged when mapped with Matrix.
@param kx horizontal skew factor @param ky vertical skew factor @param px pivot x @param py pivot y
Implementation
void setSkew(double kx, double ky, {double px = 0, double py = 0}) =>
c.mnn_cv_matrix_set_skew(ptr, kx, ky, px, py);