car not moving straight

Question

I am trying to make a simple car game but whenever i am pressing up arrow the car is moving to right. This is the code i am using and attached to the car gameobject

 public WheelCollider wheelFL, wheelFR, wheelRL, wheelRR;
     
     public float maxTorque = 50f;
     public float steerFactor = 10f;
 
     void Start () 
     {
         rigidbody.mass = 1500f;
         rigidbody.centerOfMass = new Vector3(0f, -0.9f, 0f);
     }
     
     void FixedUpdate () 
     {
         wheelRR.motorTorque = maxTorque * Input.GetAxis("Vertical");
         wheelRL.motorTorque = maxTorque * Input.GetAxis("Vertical");
         
         wheelFL.steerAngle = steerFactor * Input.GetAxis("Horizontal");
         wheelFR.steerAngle = steerFactor * Input.GetAxis("Horizontal");
         
     }

Here is how wheel colliders are set wheels

Answer 1

Answer by VaibhavRocks · Jun 06, 2014 at 04:19 AM

Hey.. does anybody got the solution to this.. please let me know ..even i need urgently

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Answer 2

Answer by florinel2102 · Sep 20, 2020 at 03:18 PM

I fixed by setting to all wheel colliders -- Sideways Friction - Extremum Slip to 0.02

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Answer 3

Answer by zakirshikhli · Apr 13 at 03:09 PM

I fixed that, by dynamically rising sidewayFriction.extremumSlip of Front WheelColliders from 0.2f to ~2.0f - 2.5f according to car speed.

Something like this void Update(){ sideFrictionFront.extremumSlip = 0.2f + (currentSpeed / currentMaxSpeed) * 2; }

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zakirshikhli · Apr 13 at 03:12 PM 0

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To fix most WheellColliders issues, many numbers there should be dynamically change accorind to speed and assign in real time (Update method): This is just a sample, not a complete solution:

 void AssignWheelPhysics()
         {
              rearLeftCollider.sidewaysFriction = sideFrictionRear;
              rearRightCollider.sidewaysFriction = sideFrictionRear;
     
              frontLeftCollider.sidewaysFriction = sideFrictionFront;
              frontRightCollider.sidewaysFriction = sideFrictionFront;
     
              rearLeftCollider.forwardFriction = forwardFrictionRear;
              rearRightCollider.forwardFriction = forwardFrictionRear;
     
              frontLeftCollider.forwardFriction = forwardFrictionFront;
              frontRightCollider.forwardFriction = forwardFrictionFront;
         }

car not moving straight

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