WheelHit.collider 碰撞器

// When attached to the WheelCollider, modifies tire friction based on
// static friction of the ground material.
//当附加到WheelCollider，基于地面材质的静态摩擦修改轮胎摩擦
function FixedUpdate() {
	var hit : WheelHit;
	var wheel : WheelCollider = GetComponent(WheelCollider);
	if( wheel.GetGroundHit( hit ) ) {
		wheel.forwardFriction.stiffness = hit.collider.material.staticFriction;
		wheel.sidewaysFriction.stiffness = hit.collider.material.staticFriction;
	}
}