Hi > > def CalculateDistance(a, b): > x, y, z = b[0] - a[0], b[1] - a[1], b[2] - a[2] > dist = x*x + y*y + z*z > return dist * dist > no offense, but "x*x + y*y + z*z" is already the distance squared, so no need for "return dist*dist". (or did you do this on purpose?). ~DR0ID