Unity使用GL画线

脚本需挂在相机上，如果你的脚本，编辑器报错了，Matrix stack full depth reached，加上这个方法试试GL.LoadPixelMatrix();

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

 public class GridLine : MonoBehaviour {

     public static bool isShowGridLine=false;
     Material lineMaterial;
     private void Awake()
     {
         if (!lineMaterial)
         {
             lineMaterial = new Material(Shader.Find("Particles/Alpha Blended"));
             lineMaterial.hideFlags = HideFlags.HideAndDontSave;
             lineMaterial.shader.hideFlags = HideFlags.HideAndDontSave;
         }
     }
     void OnPostRender()
     {
         if (isShowGridLine) {
             GL.PushMatrix();
             lineMaterial.SetPass ();
             //如果报错的话，将这句话取消注释后，再试试
 //            GL.LoadPixelMatrix ();
             GL.LoadOrtho ();
             GL.Begin (GL.LINES);
             for (int i = ; i < ; i++) {
                 GL.Color (Color.green);
                 //横线
                 GL.Vertex3 (,i/10f,);
                 GL.Vertex3 (,i/10f,);
                 //竖线
                 GL.Vertex3 (i/10f,,);
                 GL.Vertex3 (i/10f,,);
             }
             //        //斜线
             //        GL.Vertex3(0,0,0);
             //        GL.Vertex3 (1,1,0);

             GL.End ();
             GL.PopMatrix ();
         }

     }
     void Update()
     {
         if (Input.GetMouseButtonDown()) {
             isShowGridLine = true;
         }
         if (Input.GetKeyDown(KeyCode.Escape)) {
             isShowGridLine = false;
         }

     }
 }