unity linerenderer在Game視窗中任意畫線

1，設定linerenderer的顔色和其它參數。

2，建立一個空物體挂腳本。

3，LineMark.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LineMark : MonoBehaviour {



	private GameObject clone;  
	private LineRenderer line;  
	private int i;  
	public GameObject obs;  

	// Use this for initialization
	void Start () {
	}
	
	// Update is called once per frame  
	void Update () {  
		if (Input.GetMouseButtonDown(0))  
		{  
			clone = (GameObject)Instantiate(obs, obs.transform.position, transform.rotation);//克隆一個帶有LineRender的物體   
			line = clone.GetComponent<LineRenderer>();//獲得該物體上的LineRender元件  
			line.SetColors(Color.blue, Color.red);//設定顔色  
			line.SetWidth(0.2f, 0.1f);//設定寬度  
			i = 0;  
		}  
		if (Input.GetMouseButton(0))  
		{  
			i++;  
			line.SetVertexCount(i);//設定頂點數  
			line.SetPosition(i - 1, Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 15)));//設定頂點位置   
		}  
	}  
}
           

書寫效果