using System.Collections;using System.Collections.Generic;using UnityEngine;public class huaxian : MonoBehaviour {private GameObject clone;private LineRenderer line;int i;//帶有LineRender物體public GameObject target;void Start(){  Debug.Log("請開始寫字");} // Update is called once per frame  void Update(){  if (Input.GetMouseButtonDown(0))  {    //實例化對象     clone = (GameObject)Instantiate(target, target.transform.position, Quaternion.identity);    //獲得該物體上的LineRender組件     line = clone.GetComponent<LineRenderer>();    //設置起始和結束的顏色     line.SetColors(Color.red, Color.blue);    //設置起始和結束的寬度      line.SetWidth(0.2f, 0.1f);    //計數      i = 0;  }   if (Input.GetMouseButton(0))  {    //每一幀檢測，按下鼠標的時間越長，計數越多     i++;    //設置頂點數     line.SetVertexCount(i);    //設置頂點位置(頂點的索引，將鼠標點擊的屏幕坐標轉換為世界坐標)     line.SetPosition(i - 1, Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 15)));  } } }