VolumeLighting.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    VolumeLighting.h
=============================================================================*/
 
#pragma once
 
#include "RHIDefinitions.h"
#include "SceneView.h"
#include "SceneRendering.h"
#include "ShadowRendering.h"
#include "Components/LightComponent.h"
#include "Engine/MapBuildDataRegistry.h"
 
BEGIN_SHADER_PARAMETER_STRUCT(FVolumeShadowingShaderParameters, )
    SHADER_PARAMETER(FMatrix44f, TranslatedWorldToShadowMatrix)
    SHADER_PARAMETER(FVector4f, ShadowmapMinMax)
    SHADER_PARAMETER(FVector4f, DepthBiasParameters)
    SHADER_PARAMETER(FVector4f, ShadowInjectParams)
    SHADER_PARAMETER_ARRAY(FVector4f, ClippingPlanes, [2])
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, ShadowDepthTexture)
    SHADER_PARAMETER_SAMPLER(SamplerState, ShadowDepthTextureSampler)
    SHADER_PARAMETER_STRUCT_INCLUDE(FOnePassPointShadowProjection, OnePassPointShadowProjection)
    SHADER_PARAMETER(uint32, bStaticallyShadowed)
    SHADER_PARAMETER_TEXTURE(Texture2D, StaticShadowDepthTexture)
    SHADER_PARAMETER_SAMPLER(SamplerState, StaticShadowDepthTextureSampler)
    SHADER_PARAMETER(FMatrix44f, TranslatedWorldToStaticShadowMatrix)
    SHADER_PARAMETER(FVector4f, StaticShadowBufferSize)
END_SHADER_PARAMETER_STRUCT()
 
// InnerSplitIndex: which CSM shadow map level, It should be INDEX_NONE if LightSceneInfo is not a directional light
void GetVolumeShadowingShaderParameters(
    FRDGBuilder& GraphBuilder,
    const FViewInfo& View,
    const FLightSceneInfo* LightSceneInfo,
    const FProjectedShadowInfo* ShadowInfo,
    FVolumeShadowingShaderParameters& OutParameters);
 
void SetVolumeShadowingDefaultShaderParametersGlobal(
    FRDGBuilder& GraphBuilder,
    FVolumeShadowingShaderParameters& ShaderParams);
 
 
 
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FVolumeShadowingShaderParametersGlobal0, )
    SHADER_PARAMETER(FVector3f, TranslatedWorldPosition)
    SHADER_PARAMETER(float, InvRadius)
    SHADER_PARAMETER_STRUCT_INCLUDE(FVolumeShadowingShaderParameters, VolumeShadowingShaderParameters)
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FVolumeShadowingShaderParametersGlobal1, )
    SHADER_PARAMETER(FVector3f, TranslatedWorldPosition)
    SHADER_PARAMETER(float, InvRadius)
    SHADER_PARAMETER_STRUCT_INCLUDE(FVolumeShadowingShaderParameters, VolumeShadowingShaderParameters)
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
class FVisibleLightInfo;
 
void SetVolumeShadowingShaderParameters(
    FRDGBuilder& GraphBuilder,
    FVolumeShadowingShaderParametersGlobal0& ShaderParams,
    const FViewInfo& View,
    const FLightSceneInfo* LightSceneInfo,
    const FProjectedShadowInfo* ShadowInfo);
void SetVolumeShadowingShaderParameters(
    FRDGBuilder& GraphBuilder,
    FVolumeShadowingShaderParametersGlobal1& ShaderParams,
    const FViewInfo& View,
    const FLightSceneInfo* LightSceneInfo,
    const FProjectedShadowInfo* ShadowInfo);
 
void SetVolumeShadowingDefaultShaderParameters(FRDGBuilder& GraphBuilder, FVolumeShadowingShaderParametersGlobal0& ShaderParams);
void SetVolumeShadowingDefaultShaderParameters(FRDGBuilder& GraphBuilder, FVolumeShadowingShaderParametersGlobal1& ShaderParams);
 
const FProjectedShadowInfo* GetFirstWholeSceneShadowMap(const FVisibleLightInfo& VisibleLightInfo);