车轮所撞击的其他 Collider。
var wheel: WheelCollider;
function Start() {
wheel = GetComponent.<WheelCollider>();
}
// When attached to the WheelCollider, modifies tire friction based on
// static friction of the ground material.
function FixedUpdate() {
var hit : WheelHit;
if(wheel.GetGroundHit(hit)) {
wheel.forwardFriction.stiffness = hit.collider.material.staticFriction;
wheel.sidewaysFriction.stiffness = hit.collider.material.staticFriction;
}
}