function SetPass (pass : int) : bool
Description
Activate the given pass for rendering.
Pass indices start from zero and go up to (but not including) passCount.
This is mostly used in direct drawing code using GL class (Unity Pro only).
For example, Image Effects use materials for
implementing screen post-processing. For each pass in the material they activate
the pass and draw a fullscreen quad.
If SetPass returns false, you should not render anything.
Here is an example of a full image effect that inverts the colors.
Add this script to the camera and see it in play mode.
private var mat : Material;
function Start () {
mat =
new Material (
"Shader \"Hidden/Invert\
" {" +
"SubShader {" +
" Pass {" +
" ZTest Always Cull Off ZWrite Off" +
" SetTexture [_RenderTex] { combine one-texture }" +
" }" +
"}" +
"}" );
}
function OnRenderImage (source :
RenderTexture, dest :
RenderTexture) {
RenderTexture.active = dest;
source.SetGlobalShaderProperty (
"_RenderTex");
GL.PushMatrix ();
GL.LoadOrtho ();
mat.SetPass (0);
GL.Begin (
GL.QUADS);
GL.TexCoord2 (0, 0);
GL.Vertex3 (0, 0, 0.1);
GL.TexCoord2 (1, 0);
GL.Vertex3 (1, 0, 0.1);
GL.TexCoord2 (1, 1);
GL.Vertex3 (1, 1, 0.1);
GL.TexCoord2 (0, 1);
GL.Vertex3 (0, 1, 0.1);
GL.End ();
GL.PopMatrix ();
}
See Also: passCount property, GL class, ShaderLab documentation.