Collision.collider 碰撞器
var collider : Collider
Description描述
The Collider we hit (Read Only).
我们碰撞的碰撞器（只读）。
To find all colliders that were hit in detail you have to iterate the contact points (contacts property).
要查找全部被碰撞的碰撞器详情，你需要迭代接触点（contacts属性）。
