public void CollideWith(GameObject obj)
{
if (obj is Plane)
{
Plane plane = (Plane)obj;
plane.Damage(Power);
plane.AffectImpulse(Velocity * Mass, Position);
}
else if (obj is Bullet)
{
Bullet bullet = (Bullet)obj;
bullet.IsGarbage = true;
}
else if (obj is Bonus)
{
((Bonus)obj).Damage(Power);
}
IsGarbage = true;
}