void HandleCollision(Vector3 a, Vector3 b)
{
Debug.Log("COLLISION DETECTED");
velocity.x = cb.vix;
velocity.y = cb.viy;
normal.x = b.y - a.y;
normal.y = -(b.x - a.x);
reflected = Vector3.Reflect(velocity, normal);
cb.vix = -reflected.x * 3 / 4;
cb.viy = -reflected.y * 3 / 4;
cb.MoveCannonball();
}