Version: 2022.3
LanguageEnglish
  • C#

GL.Viewport

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 Viewport(Rect pixelRect);

Description

Set the rendering viewport.

All rendering is constrained to be inside the passed pixelRect. If the Viewport is modified, all the rendered content inside of it gets stretched.

using UnityEngine;

public class Example : MonoBehaviour { // Draw a red Quad that covers all the view port, and the when space is pressed // the viewport gets expanded to the whole screen and stretch the contents inside Material mat; bool stretch = false;

void Update() { if (Input.GetKeyDown(KeyCode.Space)) { if (stretch) { stretch = false; } else { stretch = true; } } }

void OnPostRender() { if (!mat) { Debug.LogError("Please Assign a material on the inspector"); return; } GL.PushMatrix(); mat.SetPass(0); GL.LoadPixelMatrix(); if (stretch) { GL.Viewport(new Rect(0, 0, Screen.width, Screen.height)); } else { GL.Viewport(new Rect(0, 0, Screen.width / 2, Screen.height)); } GL.Color(Color.red); GL.Begin(GL.QUADS); GL.Vertex3(0, 0, 0); GL.Vertex3(0, Screen.height, 0); GL.Vertex3(Screen.width, Screen.height, 0); GL.Vertex3(Screen.width, 0, 0); GL.Color(Color.yellow); GL.End(); GL.Begin(GL.TRIANGLES); GL.Vertex3(Screen.width / 2, Screen.height / 4, 1); GL.Vertex3(Screen.width / 4, Screen.height / 2, 1); GL.Vertex3(Screen.width - Screen.width / 4, Screen.height / 2, 1); GL.End(); GL.PopMatrix(); } }