opencv/cxtype.go
func NewCvPoint2D32f(x, y float32) CvPoint2D32f {
	return CvPoint2D32f{C.float(x), C.float(y)}
}
func NewCvPoint2D32f(x, y float32) CvPoint2D32f {
	return CvPoint2D32f{C.float(x), C.float(y)}
}
// returns a new CvPoint