func (r Rectangle) Size() Vec2 {
	return Vec2{
		r.Max[0] - r.Min[0],
		r.Max[1] - r.Min[1],
	}
}
func (r Rectangle) Size() Vec2 {
	return Vec2{
		r.Max[0] - r.Min[0],
		r.Max[1] - r.Min[1],
	}
}
func ( r Rectangle ) Size ( ) Vec2 { return Vec2 { r . Max [ 0 ] - r . Min [ 0 ] , r . Max [ 1 ] - r . Min [ 1 ] , } }
// Size returns r's width and height.
Size returns r s width and height .