GL.PushMatrix

설명

Saves both projection and modelview matrices to the matrix stack.

Changing modelview or projection matrices overrides current camera's parameters. These matrices can be saved and restored using GL.PushMatrix and GL.PopMatrix.

See Also: PopMatrix function.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Material mat;
    void OnPostRender() {
        if (!mat) {
            Debug.LogError("Please Assign a material on the inspector");
            return;
        }
        GL.PushMatrix();
        mat.SetPass(0);
        GL.LoadPixelMatrix();
        GL.Color(Color.yellow);
        GL.Begin(GL.LINES);
        GL.Vertex3(0, 0, 0);
        GL.Vertex3(Screen.width, Screen.height, 0);
        GL.End();
        GL.PopMatrix();
    }
}