HLODInstancedStaticMeshComponent.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Components/InstancedStaticMeshComponent.h"
#include "ISMPartition/ISMComponentBatcher.h"
#include "ISMPartition/ISMComponentDescriptor.h"
#include "HLODInstancedStaticMeshComponent.generated.h"
 
 
UCLASS(HideDropDown, NotPlaceable, MinimalAPI)
class UHLODInstancedStaticMeshComponent : public UInstancedStaticMeshComponent
{
    GENERATED_UCLASS_BODY()
 
public:
#if WITH_EDITOR
    ENGINE_API virtual TUniquePtr<FISMComponentDescriptor> AllocateISMComponentDescriptor() const;
 
    typedef TArray<FISMComponentBatcher::FComponentToInstancesMapping> FSourceComponentsToInstancesMap;
 
    ENGINE_API void SetSourceComponentsToInstancesMap(FSourceComponentsToInstancesMap&& InSourceComponentsToInstances);
    ENGINE_API const FSourceComponentsToInstancesMap& GetSourceComponentsToInstancesMap() const;
 
private:
    // Transient data, only available during HLOD builds
    FSourceComponentsToInstancesMap SourceComponentsToInstances;
#endif
};
 
 
// ISM descriptor class based on FISMComponentDescriptor
USTRUCT()
struct FHLODISMComponentDescriptor : public FISMComponentDescriptor
{
    GENERATED_BODY()
 
#if WITH_EDITOR
    ENGINE_API FHLODISMComponentDescriptor();
 
    ENGINE_API virtual void InitFrom(const UStaticMeshComponent* Component, bool bInitBodyInstance = true) override;
    ENGINE_API virtual void InitComponent(UInstancedStaticMeshComponent* ISMComponent) const override;
#endif
};