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GL.LoadPixelMatrix

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public static method LoadPixelMatrix(): void;
public static void LoadPixelMatrix();

Description

Setup a matrix for pixel-correct rendering.

This sets up modelview and projection matrices so that X, Y coordinates map directly to pixels. The (0,0) is at the bottom left corner of current camera's viewport. The Z coordinate goes from -1 to +1.

This function overrides current camera's parameters, so most often you want to save and restore matrices using GL.PushMatrix and GL.PopMatrix.

    // Draws a red triangle using pixels as coordinates to paint on.
    var mat : Material;

function OnPostRender() { if (!mat) { Debug.LogError("Please Assign a material on the inspector"); return; } GL.PushMatrix(); mat.SetPass(0); GL.LoadPixelMatrix(); GL.Color(Color.red); GL.Begin(GL.TRIANGLES); GL.Vertex3(0,0,0); GL.Vertex3(0,Screen.height/2,0); GL.Vertex3(Screen.width/2,Screen.height/2,0); GL.End(); GL.PopMatrix(); }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Material mat; void OnPostRender() { if (!mat) { Debug.LogError("Please Assign a material on the inspector"); return; } GL.PushMatrix(); mat.SetPass(0); GL.LoadPixelMatrix(); GL.Color(Color.red); GL.Begin(GL.TRIANGLES); GL.Vertex3(0, 0, 0); GL.Vertex3(0, Screen.height / 2, 0); GL.Vertex3(Screen.width / 2, Screen.height / 2, 0); GL.End(); GL.PopMatrix(); } }

public static method LoadPixelMatrix(left: float, right: float, bottom: float, top: float): void;
public static void LoadPixelMatrix(float left, float right, float bottom, float top);

Description

Setup a matrix for pixel-correct rendering.

This sets up modelview and projection matrices so that X, Y coordinates map directly to pixels. The (left,bottom is at the bottom left corner of current camera's viewport; and (top,right) is at the top right corner of current camera's viewport. The Z coordinate goes from -1 to +1.

This function overrides current camera's parameters, so most often you want to save and restore matrices using GL.PushMatrix and GL.PopMatrix.

    var mat : Material;

function OnPostRender() { if (!mat) { Debug.LogError("Please Assign a material on the inspector"); return; } GL.PushMatrix(); mat.SetPass(0); GL.LoadPixelMatrix(10,20,10,20); GL.Color(Color.red); GL.Begin(GL.TRIANGLES); GL.Vertex3(10,10,0); GL.Vertex3(10,20,0); GL.Vertex3(20,20,0); GL.End(); GL.PopMatrix(); }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Material mat; void OnPostRender() { if (!mat) { Debug.LogError("Please Assign a material on the inspector"); return; } GL.PushMatrix(); mat.SetPass(0); GL.LoadPixelMatrix(10, 20, 10, 20); GL.Color(Color.red); GL.Begin(GL.TRIANGLES); GL.Vertex3(10, 10, 0); GL.Vertex3(10, 20, 0); GL.Vertex3(20, 20, 0); GL.End(); GL.PopMatrix(); } }

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