1.Collider.OnCollisionEnter 進入碰撞，OnCollisionEnter is called when this collider/rigidbody has begun touching another rigidbody/collider.當collider/rigidbody開始觸動另一個rigidbody/collider時OnCollisionEnter被呼叫。
2.Collider.OnCollisionStay 逗留碰撞，OnCollisionStay is called once per frame for every collider/rigidbody that is touching rigidbody/collider.每個collider/rigidbody觸動rigidbody/collider，將在每幀呼叫OnCollisionStay。通俗的說，一個碰撞器或剛體觸動另一個剛體或碰撞器，在每幀都會呼叫OnCollisionStay，直到它們之間離開不接觸。
3.Collider.OnCollisionExit 退出碰撞，OnCollisionExit is called when this collider/rigidbody has stopped touching another rigidbody/collider.當 collider/rigidbody停止觸動另一個 rigidbody/collider時，OnCollisionExit被呼叫。
主要是三個階段：
1.Collider.OnCollisionEnter 進入碰撞，OnCollisionEnter is called when this collider/rigidbody has begun touching another rigidbody/collider.當collider/rigidbody開始觸動另一個rigidbody/collider時OnCollisionEnter被呼叫。
2.Collider.OnCollisionStay 逗留碰撞，OnCollisionStay is called once per frame for every collider/rigidbody that is touching rigidbody/collider.每個collider/rigidbody觸動rigidbody/collider，將在每幀呼叫OnCollisionStay。通俗的說，一個碰撞器或剛體觸動另一個剛體或碰撞器，在每幀都會呼叫OnCollisionStay，直到它們之間離開不接觸。
3.Collider.OnCollisionExit 退出碰撞，OnCollisionExit is called when this collider/rigidbody has stopped touching another rigidbody/collider.當 collider/rigidbody停止觸動另一個 rigidbody/collider時，OnCollisionExit被呼叫。