Material.SetPass

Parameters

Returns

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

Description

Активирует, учитывая pass для визуализации.

Pass индексы начинаются от нуля и поднимаются до passCount (не включая).

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 ();
    }
}

См. также: свойство passCount, класс GL, ShaderLab documentation.