add note to doc
@@ -248,6 +248,8 @@ func (p *Polygon) Color() NRGBA {
// count.
//
// This method is more effective, than creating a new Polygon with the given points.
+//
+// However, it is less expensive than using a transform on a Target.
func (p *Polygon) SetPoints(points ...Vec) {
p.data.resize(len(points))
for i, pt := range points {
