触れたらプレイヤーの重力を反転する

usingSystem.Collections;usingSystem.Collections.Generic;usingUnityEngine;publicclassPlayer:MonoBehaviour{Rigidbody2Drigid2D;boolgravity;voidStart(){this.rigid2D=GetComponent<Rigidbody2D>();gravity=false;}voidUpdate(){}　　voidOnTriggerEnter2D(Collider2Dcollision){if(collision.gameObject.CompareTag("gravity"))//オブジェクトにgravityタグ{if(gravity==false)gravity=true;elsegravity=false;rigid2D.gravityScale*=-1;}}}