G-Bufferを見てみる

GBufferVariant.cginc

#ifndef GBUFFER_VARIANT
#define GBUFFER_VARIANT

sampler2D _CameraGBufferTexture0;
sampler2D _CameraGBufferTexture1;
sampler2D _CameraGBufferTexture2;
sampler2D _CameraGBufferTexture3;

#endif //GBUFFER_VARIANT

PostProcess.cs

using System.Collections;
using UnityEngine;

[RequireComponent(typeof(Camera))]
public class PostProcess : MonoBehaviour
{
  public Material mat;

  public void Start()
  {
    GetComponent<Camera>().depthTextureMode |= DepthTextureMode.Depth;
  }

  [ImageEffectOpaque]
  public void OnRenderImage(RenderTexture source, RenderTexture destination)
  {
    Graphics.Blit(source, destination, mat);
  }
}

ShowGBuffer.shader

Shader "DeferedShadingTest/ShowGBuffer"
{
	Properties
	{
		[KeywordEnum(DIFF, SPEC, NORM, LIGHT, DEPTH)]
		_GB("G-Buffer Selecter", Float) = 0
	}

	SubShader
	{
		Cull Off ZWrite Off ZTest Always

		Pass
		{
			CGPROGRAM
			#pragma vertex vert_img
			#pragma fragment frag
			#pragma shader_feature _GB_DIFF _GB_SPEC _GB_NORM _GB_LIGHT _GB_DEPTH

			#include "UnityCG.cginc"
			#include "GBufferVariant.cginc"
			#include "UnityDeferredLibrary.cginc"

			fixed4 frag (v2f_img i) : SV_Target
			{
				#ifdef _GB_DIFF
					return tex2D(_CameraGBufferTexture0, i.uv);
				#elif _GB_SPEC
					return tex2D(_CameraGBufferTexture1, i.uv);
				#elif _GB_NORM
					return tex2D(_CameraGBufferTexture2, i.uv);
				#elif _GB_LIGHT
					return tex2D(_CameraGBufferTexture3, i.uv);
				#else
					return Linear01Depth(tex2D(_CameraDepthTexture, i.uv).r);
				#endif
			}
			ENDCG
		}
	}
}