|
|
（基于Unity 2021.3.8、URP 12.1.7）
渲染Pass流程 (Render Pass Flow)
Forward Shading
- MainLightShadowCasterPass ->
- AdditionalLightsShadowCasterPass ->
- DepthNormalPrepass / DepthPrepass ->
- ColorGradingLutPass ->
- CopyDepthPass (Depth Prepass On) ->
- DrawObjectsPass (Opaque) ->
- CopyDepthPass (Depth Prepass Off) ->
- DrawSkyboxPass ->
- MotionVectorPass ->
- CopyColorPass ->
- DrawObjectsPass (Transparent) ->
- PostProcessPass ->
- PostProcessPass (FinalPostProcessPass) ->
- FinalBlitPass
Deferred Shading
- MainLightShadowCasterPass ->
- AdditionalLightsShadowCasterPass ->
- DepthNormalPrepass ->
- ColorGradingLutPass ->
- GBufferPass ->
- CopyDepthPass ->
- TileDepthRangePass ->
- TileDepthRangePass (Extra) ->
- DeferredPass ->
- DrawObjectsPass (Opaque ForwardOnly) ->
- DrawSkyboxPass ->
- MotionVectorPass ->
- CopyColorPass ->
- DrawObjectsPass (Transparent) ->
- PostProcessPass ->
- PostProcessPass (FinalPostProcessPass) ->
- FinalBlitPass
<hr/>渲染Pass细节 (Render Pass Detail)
ScriptableRenderPass.cs
属性
- colorAttachments、colorAttachment (颜色缓冲区)
- depthAttachment (深度缓冲区)
- input (Pass所需的Buffer输入)
- clearFlag (缓冲区清除标记 (color、depth、stencil))
- clearColor (缓冲区清除颜色)
方法
- ConfigureInput (配置input)
- ConfigureTarget (配置ColorAttachment、DepthAttachment)
- ConfigureClear (配置clearFlag、clearColor)
- OnCameraSetup (虚函数)
- Configure (虚函数)
- OnCameraCleanup (虚函数)
- OnFinishCameraStackRendering (虚函数)
- Execute (抽象函数)
- CreateDrawingSettings (创建绘制设置)
定义
- ScriptableRenderPassInput (Pass所需的Buffer输入)
- RenderPassEvent (渲染Pass的执行时机事件)
MainLightShadowCasterPass.cs
- 执行Shader中LightMode为ShadowCaster的Pass, 主光源空间下渲染物体深度, 生成_MainLightShadowmapTexture
AdditionalLightsShadowCasterPass.cs
- 执行Shader中LightMode为ShadowCaster的Pass, 额外光源空间下渲染物体深度, 生成_AdditionalLightsShadowmapTexture
- 需要在Render Pipeline Asset上勾选Adiitional Lights的Cast Shadows, 并且光源Shadow Type选择Hard Shadows或Soft Shadows
DepthNormalOnlyPass.cs
- 执行Shader中LightMode为DepthNormals的Pass, 生成_CameraDepthTexture、_CameraNormalsTexture, 最终传入到Shader中的_CameraDepthNormalsTexture
- 需要有后处理用到_CameraNormalsTexture
DepthOnlyPass.cs
- 执行Shader中LightMode为DepthOnly的Pass, 生成_CameraDepthTexture
- 需要在Renderer Data上Depth Priming Mode中设置为Forced
ColorGradingLutPass.cs
- 根据用到的校色后处理 (ChannelMixer、ColorAdjustments、ColorCurves、LiftGammaGain、ShadowsMidtonesHighlights、SplitToning、WhiteBalance) 参数生成Lut校色RT, Shader实现可参考LutBuilderHdr.shader、LutBuilderLdr.shader
MotionVectorRenderPass.cs
- 生成运动向量RT
- 需要有后处理用到_MotionVectorTexture
GBufferPass.cs
- 执行Shader中LightMode为UniversalGBuffer, UniversalMaterialType为Lit、SimpleLit、Unlit的Pass, 生成Gbuffer0 ~ Gbuffer3四张RT
DeferredPass.cs
- 根据Stencil Buffer的值和Pass索引光源进行渲染, Shader实现可参考StencilDeferred.shader
DrawObjectsPass.cs
CopyDepthPass.cs
- 拷贝activeCameraDepthAttachment到_CameraDepthTexture (当DepthOnlyPass或DepthNormalOnlyPass存在时不执行)
DrawSkyboxPass.cs
CopyColorPass.cs
- 拷贝activeCameraColorAttachment到_CameraOpaqueTexture
PostProcessPass.cs
- depthOfField、motionBlur、paniniProjection、bloom、lensDistortion、chromaticAberration、vignette、colorLookup、colorAdjustments、tonemapping、filmGrain等后处理的集合, Shader实现可参考UberPost.shader
PostProcessPass.cs (FinalPostProcessPass)
- RenderFinalPass, 主要处理FXAA和Render Scale不为1.0时的Up/Down Scaling Blit, Shader实现可参考FinalPost.shader
FinalBlitPass.cs
- 将activeCameraColorAttachment Blit到cameraData.targetTexture / BuiltinRenderTextureType.CameraTarget
|
|
窥视卡
雷达卡
发表于 2022-9-21 06:51
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
千斤顶
显身卡