From 5b19af7f51ad4504fc426b8387442f6b868b5f61 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Thu, 30 Sep 2021 18:15:25 +0800
Subject: *misc

---
 .../Scripts/Rendering/CustomRenderingPipeline.cs   | 66 +++++++++++++++++++---
 1 file changed, 57 insertions(+), 9 deletions(-)

(limited to 'Assets/Scripts/Rendering/CustomRenderingPipeline.cs')

diff --git a/Assets/Scripts/Rendering/CustomRenderingPipeline.cs b/Assets/Scripts/Rendering/CustomRenderingPipeline.cs
index af70e760..9387cf52 100644
--- a/Assets/Scripts/Rendering/CustomRenderingPipeline.cs
+++ b/Assets/Scripts/Rendering/CustomRenderingPipeline.cs
@@ -4,43 +4,91 @@ using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.Rendering;
 
+// 相机的自定义管线
 [RequireComponent(typeof(MainCamera))]
 public class CustomRenderingPipeline : MonoBehaviour
 {
+    [Tooltip("开启自定义延迟渲染")]
+    public bool enableDeferredRender;
 
     public delegate void RenderEventHandler();
+    // UnitPreprocessing, UnitLensEffect, etc
     public event RenderEventHandler onPreCull;
     public event RenderEventHandler onPreRender;
     public event RenderEventHandler onPostRender;
 
-    #region 公共贴图
+    Camera m_Camera;
 
-    #endregion
+    // command buffers 
+    CommandBuffer m_CommandBufferAfterDepth;
 
-    Camera m_Camera;
+    RenderTargetIdentifier[] m_GBuffer = new RenderTargetIdentifier[4];
+    RenderTargetIdentifier m_DepthBuffer;
+    RenderTexture m_GBufferTextureDiffuse;
+    RenderTexture m_GBufferTextureNormal;
+    RenderTexture m_GBufferTexturePosition;
+    RenderTexture m_GBufferTextureTexCoord;
 
-    private void OnEable()
+    void OnEnable()
     {
         m_Camera = GetComponent<Camera>();
+
+        // command buffers
+        m_CommandBufferAfterDepth = new CommandBuffer();
+        m_Camera.AddCommandBuffer(CameraEvent.AfterDepthTexture, m_CommandBufferAfterDepth);
+
+        // render targets
+        int width = m_Camera.pixelWidth, height = m_Camera.pixelHeight;
+        m_GBufferTextureDiffuse = RenderTexture.GetTemporary(width, height, 24, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
+        m_GBufferTextureNormal = RenderTexture.GetTemporary(width, height, 24, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
+        m_GBufferTexturePosition = RenderTexture.GetTemporary(width, height, 24, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear);
+        m_GBufferTextureTexCoord = RenderTexture.GetTemporary(width, height, 24, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
+        m_GBuffer[0] = m_GBufferTextureDiffuse.colorBuffer;
+        m_GBuffer[1] = m_GBufferTextureNormal.colorBuffer;
+        m_GBuffer[2] = m_GBufferTexturePosition.colorBuffer;
+        m_GBuffer[3] = m_GBufferTextureTexCoord.colorBuffer;
+        m_DepthBuffer = m_GBufferTextureDiffuse.depthBuffer;
+
     }
 
-    private void Start()
+    void OnDisable()
     {
-    }
+        m_Camera.RemoveAllCommandBuffers();   
+    }
 
-    private void OnPreCull()
+    void OnPreCull()
     {
+        m_CommandBufferAfterDepth.Clear();
+
+        RenderGBuffer();
+
         onPreCull?.Invoke();
     }
 
-    private void OnPreRender()
+    void OnPreRender()
     {
         onPreRender?.Invoke();
     }
 
-    private void OnPostRender()
+    void OnPostRender()
     {
         onPostRender?.Invoke();
     }
 
+    void RenderGBuffer()
+    {
+        CommandBuffer cb = m_CommandBufferAfterDepth;
+        cb.SetRenderTarget(m_GBuffer, m_DepthBuffer);
+        cb.ClearRenderTarget(true, true, new Color(0, 0, 0, 0));
+        List<CustomRenderer> renderers = CustomRendererRegistry.Instance.renderers;
+        Material mat = new Material(Shader.Find(StaticDefine.shaders[EShader.GBuffer].name));
+        for(int i = 0; i < renderers.Count; ++i)
+        {
+            CustomRenderer renderer = renderers[i];
+            if (renderer == null)
+                continue;
+            cb.DrawRenderer(renderer.renderer, mat);
+        }
+    }
+
 }
\ No newline at end of file
-- 
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