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Unity Engine

stiffness

Multiplier for the WheelFrictionCurve.extremumValue and WheelFrictionCurve.asymptoteValue values (default 1).
Read time 1 minuteLast updated 12 days ago

Definition

  • Type: Property
  • Namespace: UnityEngine
  • Assembly: UnityEngine.PhysicsModule
public float stiffness { get; set; }

Remarks

Changes the stiffness of the friction. Setting this to zero will completely disable all friction from the wheel.
Usually you modify 
stiffness
to simulate various ground materials (e.g. lower the stiffness when driving on grass). Additional Resources: WheelCollider.GetGroundHit.

Examples

using UnityEngine;using System.Collections;public class ExampleClass : MonoBehaviour{    public WheelCollider wheel;    void Start()    {        wheel = GetComponent<WheelCollider>();    }    // When attached to the WheelCollider, modifies tire friction based on    // static friction of the ground material.    void FixedUpdate()    {        WheelHit hit;        if (wheel.GetGroundHit(out hit))        {            WheelFrictionCurve fFriction = wheel.forwardFriction;            fFriction.stiffness = hit.collider.material.staticFriction;            wheel.forwardFriction = fFriction;            WheelFrictionCurve sFriction = wheel.sidewaysFriction;            sFriction.stiffness = hit.collider.material.staticFriction;            wheel.sidewaysFriction = sFriction;        }    }}