GL.LoadOrtho 加载正交

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.Color(Color.red);
		GL.Begin(GL.TRIANGLES);
		GL.Vertex3(0.25F, 0.1351F, 0);
		GL.Vertex3(0.25F, 0.3F, 0);
		GL.Vertex3(0.5F, 0.3F, 0);
		GL.End();
		GL.Color(Color.yellow);
		GL.Begin(GL.TRIANGLES);
		GL.Vertex3(0.5F, 0.25F, -1);
		GL.Vertex3(0.5F, 0.1351F, -1);
		GL.Vertex3(0.1F, 0.25F, -1);
		GL.End();
		GL.PopMatrix();
	}
}

// Draws a triangle over an already drawn triangle
//绘制一个三角形，覆盖另一个三角形
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.Color(Color.red);
	GL.Begin(GL.TRIANGLES);
	GL.Vertex3(0.25,0.1351,0);
	GL.Vertex3(0.25,0.3,0);
	GL.Vertex3(0.5,0.3,0);
	GL.End();
	GL.Color(Color.yellow);
	GL.Begin(GL.TRIANGLES);
	GL.Vertex3(0.5,0.25,-1);
	GL.Vertex3(0.5,0.1351,-1);
	GL.Vertex3(0.1,0.25,-1);
	GL.End();
	GL.PopMatrix();
}