public TriggerEvent(double time, PhysicsObject myPhysicsObject, Action <PhysicsObject> callback, PhysicsObject otherPhysicsObject)
{
this.Time = time;
this.myPhysicsObject = myPhysicsObject ?? throw new ArgumentNullException(nameof(myPhysicsObject));
this.callback = callback ?? throw new ArgumentNullException(nameof(callback));
this.otherPhysicsObject = otherPhysicsObject ?? throw new ArgumentNullException(nameof(otherPhysicsObject));
this.start_vx = myPhysicsObject.Vx;
this.start_vy = myPhysicsObject.Vy;
this.start_x = myPhysicsObject.X;
this.start_y = myPhysicsObject.Y;
}