func (v Vec3) DistSqr(v1 Vec3) float32 {
	dx := v1[0] - v[0]
	dy := v1[1] - v[1]
	dz := v1[2] - v[2]
	return dx*dx + dy*dy + dz*dz
}
func (v Vec3) DistSqr(v1 Vec3) float32 {
	dx := v1[0] - v[0]
	dy := v1[1] - v[1]
	dz := v1[2] - v[2]
	return dx*dx + dy*dy + dz*dz
}
func ( v Vec3 ) DistSqr ( v1 Vec3 ) float32 { dx := v1 [ 0 ] - v [ 0 ] dy := v1 [ 1 ] - v [ 1 ] dz := v1 [ 2 ] - v [ 2 ] return dx * dx + dy * dy + dz * dz }
// DistSqr returns the square of the distance between two points.
DistSqr returns the square of the distance between two points .