func (v Vec2) Dist(v1 Vec2) float32 {
	dx := v1[0] - v[0]
	dy := v1[1] - v[1]
	return math32.Sqrt(dx*dx + dy*dy)
}
func (v Vec2) Dist(v1 Vec2) float32 {
	dx := v1[0] - v[0]
	dy := v1[1] - v[1]
	return math32.Sqrt(dx*dx + dy*dy)
}
func ( v Vec2 ) Dist ( v1 Vec2 ) float32 { dx := v1 [ 0 ] - v [ 0 ] dy := v1 [ 1 ] - v [ 1 ] return math32 . Sqrt ( dx * dx + dy * dy ) }
// Dist returns the distance between v and v1. d = dist(v, v2)
Dist returns the distance between v and v1 . d = dist ( v v2 )