在unity裏用GL畫線框

    最近由於閒來無事，無意中看到vectrosity這個畫線插件，就想研究一下，下載下來之後發現導入到unity裏之後出現錯誤，由於自己是蠢新所以改了一通也沒改對，所以就放棄了，大家需要插件的話待會我會上下載鏈接，自己可以試試，我的版本是5.2.2的，在找到http://blog.csdn.net/awnuxcvbn/article/details/17279837這個利用GL畫線的，但是感覺效果不好，所以自己修改了一下，改成了畫線框的，其實就是確定了四個點而已，而且修改成了與鼠標同步畫線的效果，大家有興趣的可以看看，共同進步···········

using UnityEngine;
using System.Collections;
public class Line : MonoBehaviour
{
    public Material mat;
    public Color color = Color.red;
    public Vector3 pos1;
    public Vector3 pos2;

    void Start()
    {
        mat.color = color;
    }

    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            pos1 = Input.mousePosition;
        }
        if (Input.GetMouseButton(0))
        {
            pos2 = Input.mousePosition;
        }
    }

    void OnPostRender()
    {
        GL.PushMatrix();
        mat.SetPass(0);
        GL.LoadOrtho();
        GL.Begin(GL.LINES);
        GL.Color(color);
        GL.Vertex3(pos1.x / Screen.width, pos1.y / Screen.height, 0);
        GL.Vertex3(pos2.x / Screen.width, pos1.y / Screen.height, 0);
        GL.Vertex3(pos2.x / Screen.width, pos1.y / Screen.height, 0);
        GL.Vertex3(pos2.x / Screen.width, pos2.y / Screen.height, 0);
        GL.Vertex3(pos2.x / Screen.width, pos2.y / Screen.height, 0);
        GL.Vertex3(pos1.x / Screen.width, pos2.y / Screen.height, 0);
        GL.Vertex3(pos1.x / Screen.width, pos2.y / Screen.height, 0);
        GL.Vertex3(pos1.x / Screen.width, pos1.y / Screen.height, 0);
        GL.End();
        GL.PopMatrix();
    }
}