// Draws a Triangle, a Quad and a line
    // with different colors
    var mat : Material;
    function OnPostRender() {
        if (!mat) {
            Debug.LogError("Please Assign a material on the inspector");
            return;
        }
        GL.PushMatrix();
        mat.SetPass(0);
        GL.LoadOrtho();
        GL.Begin(GL.TRIANGLES); // Triangle
        GL.Color(Color(1,1,1,1));
        GL.Vertex3(0.50,0.25,0);
        GL.Vertex3(0.25,0.25,0);
        GL.Vertex3(0.375,0.5,0);
        GL.End(); // End drawing Triangle
        GL.Begin(GL.QUADS); // Quad
        GL.Color(Color(0.5,0.5,0.5,1));
        GL.Vertex3(0.5,0.5,0);
        GL.Vertex3(0.5,0.75,0);
        GL.Vertex3(0.75,0.75,0);
        GL.Vertex3(0.75,0.5,0);
        GL.End(); // End drawing quad
        GL.Begin(GL.LINES); // Line
        GL.Color(Color(0,0,0,1));
        GL.Vertex3(0,0,0);
        GL.Vertex3(0.75,0.75,0);
        GL.End(); // End drawing Line
        GL.PopMatrix();
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Material mat;
    void OnPostRender() {
        if (!mat) {
            Debug.LogError("Please Assign a material on the inspector");
            return;
        }
        GL.PushMatrix();
        mat.SetPass(0);
        GL.LoadOrtho();
        GL.Begin(GL.TRIANGLES);
        GL.Color(new Color(1, 1, 1, 1));
        GL.Vertex3(0.5F, 0.25F, 0);
        GL.Vertex3(0.25F, 0.25F, 0);
        GL.Vertex3(0.375F, 0.5F, 0);
        GL.End();
        GL.Begin(GL.QUADS);
        GL.Color(new Color(0.5F, 0.5F, 0.5F, 1));
        GL.Vertex3(0.5F, 0.5F, 0);
        GL.Vertex3(0.5F, 0.75F, 0);
        GL.Vertex3(0.75F, 0.75F, 0);
        GL.Vertex3(0.75F, 0.5F, 0);
        GL.End();
        GL.Begin(GL.LINES);
        GL.Color(new Color(0, 0, 0, 1));
        GL.Vertex3(0, 0, 0);
        GL.Vertex3(0.75F, 0.75F, 0);
        GL.End();
        GL.PopMatrix();
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public mat as Material

    def OnPostRender():
        if not mat:
            Debug.LogError('Please Assign a material on the inspector')
            return
        GL.PushMatrix()
        mat.SetPass(0)
        GL.LoadOrtho()
        GL.Begin(GL.TRIANGLES)
        GL.Color(Color(1, 1, 1, 1))
        GL.Vertex3(0.5F, 0.25F, 0)
        GL.Vertex3(0.25F, 0.25F, 0)
        GL.Vertex3(0.375F, 0.5F, 0)
        GL.End()
        GL.Begin(GL.QUADS)
        GL.Color(Color(0.5F, 0.5F, 0.5F, 1))
        GL.Vertex3(0.5F, 0.5F, 0)
        GL.Vertex3(0.5F, 0.75F, 0)
        GL.Vertex3(0.75F, 0.75F, 0)
        GL.Vertex3(0.75F, 0.5F, 0)
        GL.End()
        GL.Begin(GL.LINES)
        GL.Color(Color(0, 0, 0, 1))
        GL.Vertex3(0, 0, 0)
        GL.Vertex3(0.75F, 0.75F, 0)
        GL.End()
        GL.PopMatrix()