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BlueRose 2024-12-19 11:48:30 +08:00
parent ca956b8271
commit 5f0f524eff
1 changed files with 14 additions and 9 deletions
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23
03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/MeshDraw.md
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@ -321,6 +321,7 @@ bool FSceneRenderer::RenderCustomDepthPass(
SharedContext.Pipeline = Nanite::EPipeline::Primary; SharedContext.Pipeline = Nanite::EPipeline::Primary;
// TODO: If !bWriteCustomStencil, we could copy off the depth and rasterize depth-only (probable optimization) // TODO: If !bWriteCustomStencil, we could copy off the depth and rasterize depth-only (probable optimization)
//初始化Nanite::FRasterContext RasterContext。
Nanite::FRasterContext RasterContext = Nanite::InitRasterContext( Nanite::FRasterContext RasterContext = Nanite::InitRasterContext(
GraphBuilder, GraphBuilder,
SharedContext, SharedContext,
@ -336,12 +337,13 @@ bool FSceneRenderer::RenderCustomDepthPass(
true // bCustomPass true // bCustomPass
); );
//用于构建FCustomDepthContext结构体，创建对应的贴图资源。主要包含了InputDepth、InputStencilSRV、DepthTarget、StencilTarget以及bComputeExport（是否使用ComputeShader输出）。
Nanite::FCustomDepthContext CustomDepthContext = Nanite::InitCustomDepthStencilContext( Nanite::FCustomDepthContext CustomDepthContext = Nanite::InitCustomDepthStencilContext(
GraphBuilder, GraphBuilder,
CustomDepthTextures, CustomDepthTextures,
bWriteCustomStencil); bWriteCustomStencil);
Nanite::FConfiguration CullingConfig = { 0 }; Nanite::FConfiguration CullingConfig = { 0 };//Nanite剔除设置，用的较多的是bUpdateStreaming、bPrimaryContext、bTwoPassOcclusion，设置为true。
CullingConfig.bUpdateStreaming = true; CullingConfig.bUpdateStreaming = true;
for (int32 ViewIndex = 0; ViewIndex < Views.Num(); ++ViewIndex) for (int32 ViewIndex = 0; ViewIndex < Views.Num(); ++ViewIndex)
@ -355,6 +357,7 @@ bool FSceneRenderer::RenderCustomDepthPass(
continue; continue;
} }
//创建Nanite渲染器
auto NaniteRenderer = Nanite::IRenderer::Create( auto NaniteRenderer = Nanite::IRenderer::Create(
GraphBuilder, GraphBuilder,
*Scene, *Scene,
@ -397,12 +400,14 @@ bool FSceneRenderer::RenderCustomDepthPass(
``` ```
- Nanite::InitRasterContext()：初始化Nanite::FRasterContext RasterContext。 - Nanite::InitRasterContext()：初始化Nanite::FRasterContext RasterContext。
- Nanite::InitCustomDepthStencilContext()：位于NaniteMaterials.cpp，用于构建FCustomDepthContext结构体，主要包含了InputDepth、InputStencilSRV、DepthTarget、StencilTarget以及bComputeExport（是否使用ComputeShader输出）。 - Nanite::InitCustomDepthStencilContext()：位于NaniteMaterials.cpp，用于构建FCustomDepthContext结构体，创建对应的贴图资源。主要包含了InputDepth、InputStencilSRV、DepthTarget、StencilTarget以及bComputeExport（是否使用ComputeShader输出）。
- auto NaniteRenderer = Nanite::IRenderer::Create()：创建Nanite渲染器
- NaniteRenderer->DrawGeometry()：Nanite物体绘制
- NaniteRenderer->ExtractResults( RasterResults )：提取渲染结果。
- ***Nanite::EmitCustomDepthStencilTargets()***：使用提取到的Nanite::FRasterResults RasterResults，输出CustomDepth。结果存储在 FCustomDepthContext& CustomDepthContext中。
- FDepthExportCS / FEmitCustomDepthStencilPS
- Nanite::FinalizeCustomDepthStencil()：将CustomDepthContext中的结果输出到CustomDepthTextures上。
## NaniteRenderer ## BasePass Nanite
1. auto NaniteRenderer = Nanite::IRenderer::Create() 1. Render()中向RenderBasePass()传入const TArrayView<Nanite::FRasterResults>& NaniteRasterResults。
2. NaniteRenderer->DrawGeometry 2. 调用Lambda RenderNaniteBasePass()，本质上是调用Nanite::DrawBasePass()进行渲染。
3. NaniteRenderer->ExtractResults( RasterResults );
4. Nanite::EmitCustomDepthStencilTargets()
## Nanite::FinalizeCustomDepthStencil()