func (v Vec2) Approx(v1 Vec2) bool {
	return math32.Approx(v[0], v1[0]) &&
		math32.Approx(v[1], v1[1])
}
func (v Vec2) Approx(v1 Vec2) bool {
	return math32.Approx(v[0], v1[0]) &&
		math32.Approx(v[1], v1[1])
}
// Approx reports wether v and v1 are approximately equal.
//
// Element-wise approximation uses math32.Approx()