using UnityEngine;
using System.Collections;
 
public class NewBehaviourScript : MonoBehaviour {
 
 private GameObject clone;
 private LineRenderer line;
 int i;
 //帶有LineRender物體
 public GameObject target;
 void Start () {
 
 }
 
 // Update is called once per frame
 void Update () {
 if (Input.GetMouseButtonDown (0)) {
 //實(shí)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(shè)置起始和結(jié)束的顏色
 line.SetColors(Color.red,Color.blue);
 //設(shè)置起始和結(jié)束的寬度
 line.SetWidth(0.2f,0.1f);
 //計(jì)數(shù)
 i=0;
 }
 if(Input.GetMouseButton(0))
 {
 //每一幀檢測，按下鼠標(biāo)的時(shí)間越長，計(jì)數(shù)越多
 i++;
 //設(shè)置頂點(diǎn)數(shù)
 line.SetVertexCount(i);
 //設(shè)置頂點(diǎn)位置(頂點(diǎn)的索引，將鼠標(biāo)點(diǎn)擊的屏幕坐標(biāo)轉(zhuǎn)換為世界坐標(biāo))
 line.SetPosition(i-1,Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,15)));
 
 
 }
 
 }
}