func (v Vec2) Len() float32 {
	return math32.Sqrt(v[0]*v[0] + v[1]*v[1])
}
func (v Vec2) Len() float32 {
	return math32.Sqrt(v[0]*v[0] + v[1]*v[1])
}
func ( v Vec2 ) Len ( ) float32 { return math32 . Sqrt ( v [ 0 ] * v [ 0 ] + v [ 1 ] * v [ 1 ] ) }
// Len derives the scalar scalar length of the vector. (len)
Len derives the scalar scalar length of the vector . ( len )