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Material.SetPass

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public function SetPass(pass: int): bool;
public bool SetPass(int pass);

Parámetros

pass Shader pass number to setup.

Valor de retorno

bool If false is returned, no rendering should be done.

Descripción

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. 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. This is typically the case for special pass types that aren't meant for rendering, like GrabPass.


        
using UnityEngine;

// A script that when attached to the camera, makes the resulting // colors inverted. See its effect in play mode. public class ExampleClass : MonoBehaviour { private Material mat;

// Will be called from camera after regular rendering is done. public void OnPostRender () { if (!mat) { // Unity has a built-in shader that is useful for drawing // simple colored things. In this case, we just want to use // a blend mode that inverts destination colors. Shader shader = Shader.Find ("Hidden/Internal-Colored"); mat = new Material (shader); mat.hideFlags = HideFlags.HideAndDontSave; // Set blend mode to invert destination colors. mat.SetInt ("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusDstColor); mat.SetInt ("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero); // Turn off backface culling, depth writes, depth test. mat.SetInt ("_Cull", (int)UnityEngine.Rendering.CullMode.Off); mat.SetInt ("_ZWrite", 0); mat.SetInt ("_ZTest", (int)UnityEngine.Rendering.CompareFunction.Always); }

GL.PushMatrix (); GL.LoadOrtho ();

// activate the first shader pass (in this case we know it is the only pass) mat.SetPass (0); // draw a quad over whole screen GL.Begin (GL.QUADS); GL.Vertex3 (0, 0, 0); GL.Vertex3 (1, 0, 0); GL.Vertex3 (1, 1, 0); GL.Vertex3 (0, 1, 0); GL.End ();

GL.PopMatrix (); } }

See Also: passCount property, GL class, ShaderLab documentation.