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.
// Draws a triangle over an already drawn triangle
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();
}
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.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(); } }
See Also: GL.LoadProjectionMatrix.
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