GL.PopMatrix

Description

Restores both projection and modelview matrices off the top of 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: PushMatrix function.

using UnityEngine;

public class Example : MonoBehaviour
{
    // Draw a yellow line from the botton left to the
    // top right of the screen
    Material mat;

    void OnPostRender()
    {
        if (!mat)
        {
            Debug.LogError("Please Assign a material on the inspector");
            return;
        }
        GL.PushMatrix(); // Save the current state
        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(); // Pop changes.
    }
}