The other Collider the wheel is hitting.
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; } }
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