RayTracingSkyLight.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
RaytracingOptions.h declares ray tracing options for use in rendering
=============================================================================*/
 
#pragma once
 
#include "UniformBuffer.h"
#include "RenderGraph.h"
#include "SceneRendering.h"
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FSkyLightData, RENDERER_API)
    SHADER_PARAMETER(uint32, SamplesPerPixel)
    SHADER_PARAMETER(float, MaxRayDistance)
    SHADER_PARAMETER(float, MaxNormalBias)
    SHADER_PARAMETER(float, MaxShadowThickness)
    SHADER_PARAMETER(int, bTransmission)
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
BEGIN_SHADER_PARAMETER_STRUCT(FWritableSkyLightVisibilityRaysData, )
    SHADER_PARAMETER_RDG_BUFFER_UAV(RWStructuredBuffer<SkyLightVisibilityRays>, OutSkyLightVisibilityRays)
    SHADER_PARAMETER(FIntVector, SkyLightVisibilityRaysDimensions)
END_SHADER_PARAMETER_STRUCT()
 
BEGIN_SHADER_PARAMETER_STRUCT(FSkyLightVisibilityRaysData, )
    SHADER_PARAMETER_RDG_BUFFER_SRV(StructuredBuffer<SkyLightVisibilityRays>, SkyLightVisibilityRays)
    SHADER_PARAMETER(FIntVector, SkyLightVisibilityRaysDimensions)
END_SHADER_PARAMETER_STRUCT()
 
#if RHI_RAYTRACING
 
int32 GetRayTracingSkyLightDecoupleSampleGenerationCVarValue();
 
class FPathTracingSkylight;
 
bool SetupSkyLightParameters(
    FRDGBuilder& GraphBuilder, FScene* Scene, const FViewInfo& View,
    bool bEnableSkylight,
    FPathTracingSkylight* SkylightParameters,
    FSkyLightData* SkyLight);
 
void SetupSkyLightVisibilityRaysParameters(FRDGBuilder& GraphBuilder, const FViewInfo& View, FSkyLightVisibilityRaysData* OutSkyLightVisibilityRaysData);
 
#endif // RHI_RAYTRACING