RayTracingInstanceMask.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "RHIDefinitions.h"
 
#if RHI_RAYTRACING
 
// Forward declarations used in this header
struct FMeshBatch;
class FPrimitiveSceneProxy;
class FSceneViewFamily;
struct FRayTracingInstance;
class FRayTracingMeshCommand;
class FMaterial;
enum EBlendMode : int;
 
struct FRayTracingMaskAndFlags
{
    uint8 Mask = 0xFF;
 
    uint8 bForceOpaque : 1 = false;
 
    uint8 bDoubleSided : 1 = false;
    
    uint8 bReverseCulling : 1 = false;
 
    uint8 bAnySegmentsDecal : 1 = false;
    uint8 bAllSegmentsDecal : 1 = false;
 
    uint8 bAllSegmentsTranslucent : 1 = false;
};
 
 
enum class ERayTracingType : uint8
{
    RayTracing,
    PathTracing,
    LightMapTracing,
};
 
RENDERER_API uint8 BlendModeToRayTracingInstanceMask(const EBlendMode BlendMode, bool bIsDitherMasked, bool bCastShadow, ERayTracingType RayTracingType);
 
 
//-------------------------------------------------------
//  Build Instance mask and flags (if needed)
//-------------------------------------------------------
 
// Build mask and flags without modification of RayTracingInstance
FRayTracingMaskAndFlags BuildRayTracingInstanceMaskAndFlags(const FRayTracingInstance& Instance, const FPrimitiveSceneProxy& PrimitiveSceneProxy);
 
//-------------------------------------------------------
//  FRayTracingMeshCommand related mask setup and update
//-------------------------------------------------------
void SetupRayTracingMeshCommandMaskAndStatus(FRayTracingMeshCommand& MeshCommand, const FMeshBatch& MeshBatch, const FPrimitiveSceneProxy* PrimitiveSceneProxy,
    const FMaterial& MaterialResource, ERayTracingType RayTracingType);
 
#endif