一.学习的知识1.LineRenderer的用法 以及点击事件二.画图代码usingSystem.Collections;usingSystem.Collections.Generic;usingUnityEngine;usingUnityEngine.EventSystems;publicclassDraw:MonoBehaviour,IPointerDownHandler,IPointerUpHandler,IPointerExitHandler,IPointerEnterHandler{ LineRendererline; boolfg=false; boolfgs