Thank you for the comment!
I have my own experience to drive a car with a trailer too. May be it game has some mistakes, but in general it move as same as real car trailer. I made a screenshot video to compare game's and real car trailers behaviour.
Please, tell more what you meant about wrong behaviour of trailer in this game.
I checked pivot (as middle between wheels) on sprite:
Most of my frustration came from the trailer itself jumping towards its side when the angle got too great, as if there wasn't any weight in the trailer nor grip to the wheels. As far as I can tell, the forces acting upon the vehicle+trailer aren't taking into account the hitch's own rotation and forces that applies. Also, probably the biggest contributor is that the there is no actual state to the turning direction as you would in a real vehicle (e.g., the tires turn to face a direction and remain there until you counter-turn them).
I think most of my gripes would be solved by retaining wheel turn state and making the trailer more weighted or have it have a higher drag amount when lateral force is applied. Not certain what your model is, just some thoughts.
Ok, I see. I think in real life, the trailer will break or detach from the car, or it will be dragged almost jumping :) So, in real life is better way to not allow very big angle of direction for the trailer.
What about wheels rotation: in fact, in this game, the wheels retain the angle of rotation, but for a very short time, as if the driver quickly turns the steering wheel back if the arrow on the keyboard is not pressed, because I am used to the fact that in games movement without a pressed arrow straight-line movement.
Thanks for the clarification!
I'm a little late with this but I think it will be a lot better if you drew a steering wheel in the middle that would reflect the current rotation of the wheels.
