Version: 2018.4
LanguageEnglish
  • C#

GL.LoadOrtho

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Declaration

public static void LoadOrtho();

Description

Helper function to set up an ortho perspective transform.

After calling LoadOrtho, the viewing frustum goes from (0,0,-1) to (1,1,100).
LoadOrtho can be used for drawing primitives in 2D.

using UnityEngine;

public class Example : MonoBehaviour { // Draws a triangle over an already drawn triangle 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(); } }