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Semi Trucks and Trailers Physics : A General Discussion

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    Semi Trucks and Trailers Physics : A General Discussion

    Hi awesome Unreal Developers. I created this thread because I found no specific thread for this topic in the forums. The main point of Discussion is Semi Trucks and Trailer Physics.

    I am currently making prototypes of truck and trailers.

    1. I want to make a Truck having three Axel. But the default implementation for vehicles (Using Skeleton for Wheels and Vehicle Body) does not allow for more than 2 Axel and have a Engine for the torque. What is the possible way for this?

    2. I have created a dummy truck with two Axel configuration (Just like a car). I am currently stuck with Hitching mechanism for the Truck and Trailer. What is the possible solution?

    #2
    This truck with trailer is sold on the marketplace, the video shows it working:

    https://www.youtube.com/watch?v=IESZI0-ZVzs

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      #3
      For the hitching mechanism, I followed this tutorial:

      https://www.youtube.com/watch?v=VVPSTDiDlOA

      You will likely notice the final result he achieves is a little odd (trailer doesn't feel solidly attached). To get a realistic and solid feel, I had to tweak it quite a bit but it is a good starting point. I did manage to achieve a very solid and realistic trailer attachment.
      I'm in the process of reworking my vehicle class, so I don't have mine available as an example yet.

      One tip (which I haven't implemented yet) is when it comes to jackknifing a trailer; I recommend breaking the constraint when the rotation exceeds a certain amount. Even though through testing of how the physics behaved when jackknifing, it worked quite well surprisingly. The trailer would bind up and behave as you would expect. However, there were rare occasions when pushed to extremes where the physics would freak out and launch the truck/trailer into the sky. Breaking the constraint before getting to this point is currently the best solution I've found to solve this.
      No bugs were harmed during bug killing operations

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