Wheel Collider Detect Tire Slip

You know in racing games how if your tire spins underneath you, it creates smoke? And if your car goes sideways, the tires screech and you get smoke too? Is there any easy way for detecting this type of behavior with wheel colliders?

 

You can get the slip information from something like this:

Code (CSharp):

1. yourWheelCollider.GetGroundHit(out WheelHit wheelData);
2. slipLat = wheelData.sidewaysSlip;
3. slipLong = wheelData.forwardSlip;

Check the documentation here: https://docs.unity3d.com/ScriptReference/WheelHit.html

sidewaysSlip outputs in radians from wheel direction, so a value of Pi/2 means a pure lateral slide.
forwardSlip is a % of transmissible force on the slip axis.

 

I have a simple simple solution for this. By this your car can have skid marks and tire smoke at the right moment

Code (CSharp):

1.  WheelHit hit = new WheelHit();
2.  
3. WheelCollider yourWheelcollider = GetComponent<WheelCollider>();
4.  
5.         if (yourWheelcollider.GetGroundHit(out hit))
6.         {
7.             if (hit.sidewaysSlip > .15)
8.                 Debug.Log("drifting");
9.         }