RayTracingDecals.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "RenderGraphResources.h"
#include "RenderGraphDefinitions.h"
 
#if RHI_RAYTRACING
 
class FScene;
class FShaderType;
class FRHIRayTracingShader;
class FGlobalShaderMap;
 
enum EBlendMode : int;
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FRayTracingDecals, RENDERER_API)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2DArray<uint>, Grid)
    SHADER_PARAMETER_RDG_BUFFER_SRV(Buffer<uint>, GridData)
    SHADER_PARAMETER(FVector3f, TranslatedBoundMin)
    SHADER_PARAMETER(FVector3f, TranslatedBoundMax)
    SHADER_PARAMETER(uint32, GridResolution)
    SHADER_PARAMETER(uint32, GridMaxCount)
    SHADER_PARAMETER(uint32, GridAxis)
    SHADER_PARAMETER(uint32, Count)
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
TRDGUniformBufferRef<FRayTracingDecals> CreateNullRayTracingDecalsUniformBuffer(FRDGBuilder& GraphBuilder);
TRDGUniformBufferRef<FRayTracingDecals> CreateRayTracingDecalData(FRDGBuilder& GraphBuilder, FScene& Scene, const FViewInfo& View, uint32 BaseCallableSlotIndex);
 
FShaderType* GetRayTracingDecalMaterialShaderType(EBlendMode BlendMode);
 
FRHIRayTracingShader* GetDefaultOpaqueMeshDecalHitShader(const FGlobalShaderMap* ShaderMap);
FRHIRayTracingShader* GetDefaultHiddenMeshDecalHitShader(const FGlobalShaderMap* ShaderMap);
 
#endif