Move and Turn a box (Kart Physics)

Hello,

I'm French and I'm making a kart game system like mario kart or Crash Team Racing.
I tried to make a car with Weel Colliders but it wasn't work
so I decided to use a box collider and move it with Rigidbody.AddForce and turn on y axis with Rigidbody.AddTorque :

Code (CSharp):

1. Awake() {
2.     rb = GetComponent<Rigidbody>();
3. }
4.  
5. FixedUpdate() {
6.      rb.AddForce(transform.forward * power * Input.GetAxis("Vertical");
7.      rb.AddTorque(Vector3.up * turnSpeed * Input.GetAxis("Horizontal");
8. }

Unfortunately the box slip too much and decelerate very quickly when vertical axis is released
How I can fix it ? to get a box with like car movement ?

 

What you need is more friction along the X axis and less friction along the Z axis. This is, really, the exact purpose of the wheel collider, and I'm not aware of a way to fake it in a box collider. I'd suggest you give those another shot.

 

What do you propose ? Do you have a idea to make a kart ?

 

Have you tried following the WheelCollider Tutorial?

 

Yes and I add centerOfMass & AntiRollBar script, I got a stable car but very slippery (not easy to control)
I don't understood why

 

Did you try increasing the Wheel Collider's sideways friction stiffness?

 

I solved my problem by reading a tutorial from Game Development for iOS with Unity 3D by Jeff W.Murray book in Making a Kart-Racing Game chapter, you can find the resources for free on CRC Press website here : https://www.crcpress.com/Game-Development-for-iOS-with-Unity3D/Murray/9781439892190

 

But I want to know how to make a arcade car like in SuperTuxKart, Mario kart, CTR... by using Wheels Colliders.
I would like to get a driving system work with Toon Car (stable, fast, not very slippery, simple collisions and curved road).

What I need to done it ? any suggestions ?

Please