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using UnityEngine;using System.Collections;public class MyLine : MonoBehaviour{	private LineRenderer _line;	private Vector3 _mouse3Dpos;	private int _index= 0;	private int _lengthOfLineRenderer = 0;	void Start()	{		_line = GetComponent
   
     ();		_line.material = new Material(Shader.Find("Particles/Additive")); 		_line.SetColors (Color.red, Color.black);		_line.SetWidth (0.02f, 0.02f);	}	void Update()	{//		if (Input.GetMouseButton(0)) {			_mouse3Dpos = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,1.0f));  //		////		}		transform.Translate (new Vector3(Input.GetAxis("Horizontal"),0,Input.GetAxis("Vertical")));		if (Input.GetAxis("Horizontal")!=0 || Input.GetAxis("Vertical")!=0 ) {			LineSetVerterCount ();			_mouse3Dpos = transform.position;		}		while (_index < _lengthOfLineRenderer) {			_line.SetPosition (_index, _mouse3Dpos);			_index++;		}		if (Input.GetKeyDown(KeyCode.Q)) {			_lengthOfLineRenderer = 0;			_index = 0;			_line.SetVertexCount (0);		}	}	void LineSetVerterCount()	{		_lengthOfLineRenderer++;		_line.SetVertexCount (_lengthOfLineRenderer);	}}
   

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