Question

JavaScript => public var stiffness: float;
C# => public float stiffness;

Description 描述

Multiplier for the extremumValue and asymptoteValue values (default 1).

用于extremumValue和asymptoteValue值的倍数（默认为1）。

Changes the stiffness of the friction. Setting this to zero will completely disable all friction from the wheel.

改变摩擦的刚度，设置为零将完全禁用车轮的所有摩擦。

Usually you modify stiffness to simulate various ground materials (e.g. lower the stiffness when driving on grass). See Also: WheelCollider.GetGroundHit.

通常修改stiffness来模拟各种地面材质（例如，草地具有较低的刚度）。

JavaScript:

#pragma strict
public var wheel: WheelCollider;
function Start() {
	wheel = GetComponent.<WheelCollider>();
}
// static friction of the ground material.
function FixedUpdate() {
	var hit: WheelHit;
	if (wheel.GetGroundHit(hit)) {
		var fFriction: WheelFrictionCurve = wheel.forwardFriction;
		fFriction.stiffness = hit.collider.material.staticFriction;
		wheel.forwardFriction = fFriction;
		var sFriction: WheelFrictionCurve = wheel.sidewaysFriction;
		sFriction.stiffness = hit.collider.material.staticFriction;
		wheel.sidewaysFriction = sFriction;
	}
}

C#:

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;
        }
    }
}

WheelFrictionCurve