static function SetRevertBackfacing (revertBackFaces : bool) : void
Description
Select whether to invert the backface culling (true) or not (false).
Unlike most other calls, this is not only related to stuff you draw via GL class.
It changes culling of triangles globally.
Major use case: rendering reflections for mirrors, water etc. Since virtual camera for
rendering the reflection is mirrored, the culling order has to be inverted. You can see
that the Water script in Pro Standard Assets does that.
var mat :
Material;
var swap : boolean =
false;
function Update() {
if(
Input.GetKeyDown(
KeyCode.Space)) {
if(swap) {
swap =
false;
}
else {
swap = true;
}
}
}
function OnPostRender() {
if (!mat) {
Debug.LogError(
"Please Assign a material on the inspector");
return;
}
GL.PushMatrix();
mat.SetPass(0);
GL.LoadOrtho();
GL.Color(
Color.yellow);
GL.Begin(
GL.TRIANGLES);
GL.SetRevertBackfacing(swap);
GL.Vertex3(0,0,0);
GL.Vertex3(1,1,0);
GL.Vertex3(0,1,0);
GL.Vertex3(0,0,0);
GL.Vertex3(1,1,0);
GL.Vertex3(1,0,0);
GL.End();
GL.PopMatrix();
}
using UnityEngine;
using System.Collections;
public class example :
MonoBehaviour {
public Material mat;
public bool swap =
false;
void Update() {
if (
Input.GetKeyDown(
KeyCode.Space))
if (swap)
swap =
false;
else swap = true;
}
void OnPostRender() {
if (!mat) {
Debug.LogError(
"Please Assign a material on the inspector");
return;
}
GL.PushMatrix();
mat.SetPass(0);
GL.LoadOrtho();
GL.Color(
Color.yellow);
GL.Begin(
GL.TRIANGLES);
GL.SetRevertBackfacing(swap);
GL.Vertex3(0, 0, 0);
GL.Vertex3(1, 1, 0);
GL.Vertex3(0, 1, 0);
GL.Vertex3(0, 0, 0);
GL.Vertex3(1, 1, 0);
GL.Vertex3(1, 0, 0);
GL.End();
GL.PopMatrix();
}
}
import UnityEngine
import System.Collections
class example(
MonoBehaviour):
public mat as
Material public swap as
bool =
false def
Update():
if Input.GetKeyDown(
KeyCode.Space):
if swap:
swap =
false else:
swap = true
def
OnPostRender():
if not mat:
Debug.LogError('Please Assign a material on the inspector')
return GL.PushMatrix()
mat.SetPass(0)
GL.LoadOrtho()
GL.Color(
Color.yellow)
GL.Begin(
GL.TRIANGLES)
GL.SetRevertBackfacing(swap)
GL.Vertex3(0, 0, 0)
GL.Vertex3(1, 1, 0)
GL.Vertex3(0, 1, 0)
GL.Vertex3(0, 0, 0)
GL.Vertex3(1, 1, 0)
GL.Vertex3(1, 0, 0)
GL.End()
GL.PopMatrix()
Manual