squaredDistanceTo method
Computes the squared euclidean distance between this 3D vector and the given one. Calling this method is faster than calling {@link Vector3#distanceTo}, since it avoids computing a square root.
Implementation
double squaredDistanceTo(Vector3 v ) {
final dx = x - v.x, dy = y - v.y, dz = z - v.z;
return ( dx * dx ) + ( dy * dy ) + ( dz * dz );
}