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Question by me136703 · Jun 14, 2020 at 09:01 AM · physicsvector3quaternionvehicle

vehicle falls off loop (physics problem?)

Not a great title but I can't think of a good way to describe this problem, so there's a video of it here:

https://imgur.com/a/BCvEFjn

Basically whenever the vehicle reaches a point near the top of the loop, it falls off and sort of teleports to the ground below.

I've done some testing and can't find the cause of the problem: I rebuilt the environment in another scene and it worked fine, with the exact same code to be run on the loop:

 RaycastHit hit;
 Physics.Raycast(transform.position, -transform.up, out hit);
 
 Vector3 forwardDir = Vector3.Cross(transform.right, hit.normal);
 Quaternion newLook = Quaternion.LookRotation(forwardDir, hit.normal);
 transform.rotation = Quaternion.Slerp(transform.rotation, newLook, 0.05f);
 
 if (Physics.Raycast(transform.position, -hit.normal, 0.3f))
 {
     //rb.AddForce(hit.normal * 4, ForceMode.Acceleration);
 }
 else
 {
     //rb.AddForce(-hit.normal * 25, ForceMode.Acceleration);
 }

(There is other code for the player to move while on the loop). Does anyone know why this could be happening or has anyone experienced something similar in the past?

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