// updates an enemy with fighter type bomber
void EnemyControl::updateBomber(Enemy& e, float deltaT){
	XMFLOAT3 a;
	XMFLOAT3 drag;
	XMVECTOR v = XMLoadFloat3(&e.vel);
	XMStoreFloat3(&a ,XMVector3Normalize(v));
	XMStoreFloat3(&drag, XMVector3Cross(v, v));
	a.x = a.x * e.thrust - drag.x;
	a.y = a.y * e.thrust - drag.y;
	a.z = a.z * e.thrust - drag.z;

	// update enemy velocity
	e.vel.x += deltaT * a.x;
	e.vel.y += deltaT * a.y;
	e.vel.y += deltaT * a.z;
	// update enemy position
	e.pos.x = e.pos.x + deltaT * e.vel.x;
	e.pos.y = e.pos.y + deltaT * e.vel.y;
	e.pos.z = e.pos.z + deltaT * e.vel.z;
}