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2024-10-16 15:26:06 +08:00
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commit 77dc7193cd
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03-UnrealEngine/Rendering/RenderingPipeline/Lighting/LightChannel实现.md Normal file
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---
title: Untitled
date: 2024-10-16 14:39:40
excerpt:
tags:
rating: ⭐
---
# 前言
# Stencil相关
BasePass:绘制Stencil
=>
CopyStencilToLightingChannels
=>
ClearStencil (SceneDepthZ) :清空深度缓存中的Stencil
## BasePass
BasePass中进行LIGHTING_CHANNELS、DISTANCE_FIELD_REPRESENTATION、贴花方面的Mask Bit计算，设置到深度缓存的Stencil上。
```c++
template<bool bDepthTest, ECompareFunction CompareFunction>
void SetDepthStencilStateForBasePass_Internal(FMeshPassProcessorRenderState& InDrawRenderState, ERHIFeatureLevel::Type FeatureLevel)
{
const static bool bStrataDufferPassEnabled = Strata::IsStrataEnabled() && Strata::IsDBufferPassEnabled(GShaderPlatformForFeatureLevel[FeatureLevel]);
if (bStrataDufferPassEnabled)
{
SetDepthStencilStateForBasePass_Internal<bDepthTest, CompareFunction, GET_STENCIL_BIT_MASK(STRATA_RECEIVE_DBUFFER_NORMAL, 1) | GET_STENCIL_BIT_MASK(STRATA_RECEIVE_DBUFFER_DIFFUSE, 1) | GET_STENCIL_BIT_MASK(STRATA_RECEIVE_DBUFFER_ROUGHNESS, 1) | GET_STENCIL_BIT_MASK(DISTANCE_FIELD_REPRESENTATION, 1) | STENCIL_LIGHTING_CHANNELS_MASK(0x7)>(InDrawRenderState);
}
else
{
SetDepthStencilStateForBasePass_Internal<bDepthTest, CompareFunction, GET_STENCIL_BIT_MASK(RECEIVE_DECAL, 1) | GET_STENCIL_BIT_MASK(DISTANCE_FIELD_REPRESENTATION, 1) | STENCIL_LIGHTING_CHANNELS_MASK(0x7)>(InDrawRenderState);
}
}
```