void Matrix3DUtils::getDown(const Matrix3D &m, Vector3D &out) { m.copyColumnTo(1, out); out.negate(); }
void Matrix3DUtils::getBackward(const Matrix3D &m, Vector3D &out) { m.copyColumnTo(2, out); out.negate(); }
void Object3D::getLeftVector(Vector3D& result) { getRightVector(result); result.negate(); }
void Object3D::getDownVector(Vector3D& result) { getUpVector(result); result.negate(); }
void Object3D::getBackVector(Vector3D& result) { getForwardVector(result); result.negate(); }