Collider.ClosestPointOnBounds 到边界框最近点

var hitPoints : float = 100.0;
function ApplyHitPoints (explosionPos : Vector3, radius : float) {
	// The distance from the explosion position to the surface of the rigidbody
	//从爆炸点到刚体表面的距离
	var closestPoint : Vector3 = collider.ClosestPointOnBounds(explosionPos);
	var distance : float = Vector3.Distance(closestPoint, explosionPos);

	// The hit points we apply fall decrease with distance from the hit point
	//伤害点数，我们使到伤害点距离减少
	var hitPoints : float = 1.0 - Mathf.Clamp01(distance / radius);

	// This is the final hitpoints we want to apply. 10 at maximum
	//这是我们想要的最终伤害点数为10
	hitPoints *= 10;
}