Unity使用GL畫線

腳本需掛在相機上，如果你的腳本，編輯器報錯了，Matrix stack full depth reached，加上這個方法試試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 (0);
            //如果報錯的話，將這句話取消注釋后，再試試
//            GL.LoadPixelMatrix ();
            GL.LoadOrtho ();
            GL.Begin (GL.LINES);
            for (int i = 0; i < 10; i++) {
                GL.Color (Color.green);
                //橫線
                GL.Vertex3 (0,i/10f,0);
                GL.Vertex3 (1,i/10f,0);
                //豎線
                GL.Vertex3 (i/10f,0,0);
                GL.Vertex3 (i/10f,1,0);
            }
            //        //斜線
            //        GL.Vertex3(0,0,0);
            //        GL.Vertex3 (1,1,0);

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

    }
    void Update()
    {
        if (Input.GetMouseButtonDown(1)) {
            isShowGridLine = true;
        }
        if (Input.GetKeyDown(KeyCode.Escape)) {
            isShowGridLine = false;
        }

    }
}