WorldPartitionLevelStreamingPolicy.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "WorldPartition/WorldPartitionStreamingPolicy.h"
#include "WorldPartition/WorldPartitionRuntimeContainerResolving.h"
#include "WorldPartitionLevelStreamingPolicy.generated.h"
 
struct FResourceSizeEx;
class UWorldPartitionRuntimeLevelStreamingCell;
enum class EWorldPartitionRuntimeCellState : uint8;
 
UCLASS()
class UWorldPartitionLevelStreamingPolicy : public UWorldPartitionStreamingPolicy
{
    GENERATED_BODY()
 
public:
    virtual void DrawRuntimeCellsDetails(class UCanvas* Canvas, FVector2D& Offset) override;
    virtual bool IsStreamingCompleted(const TArray<FWorldPartitionStreamingSource>* InStreamingSources) const override;
 
#if WITH_EDITOR
    virtual TSubclassOf<class UWorldPartitionRuntimeCell> GetRuntimeCellClass() const override;
    virtual void PrepareActorToCellRemapping() override;
    virtual void SetContainerResolver(const FWorldPartitionRuntimeContainerResolver& InContainerResolver) override { ContainerResolver = InContainerResolver; }
    virtual void RemapSoftObjectPath(FSoftObjectPath& ObjectPath) const override;
    static FString GetCellPackagePath(const FName& InCellName, const UWorld* InWorld);
 
    virtual bool StoreStreamingContentToExternalStreamingObject(URuntimeHashExternalStreamingObjectBase& OutExternalStreamingObject) override;
    virtual bool ConvertContainerPathToEditorPath(const FActorContainerID& InContainerID, const FSoftObjectPath& InPath, FSoftObjectPath& OutPath) const;
#endif
 
    virtual bool ConvertEditorPathToRuntimePath(const FSoftObjectPath& InPath, FSoftObjectPath& OutPath) const override;
    virtual UObject* GetSubObject(const TCHAR* SubObjectPath) override;
 
    virtual bool InjectExternalStreamingObject(URuntimeHashExternalStreamingObjectBase* ExternalStreamingObject) override;
    virtual bool RemoveExternalStreamingObject(URuntimeHashExternalStreamingObjectBase* ExternalStreamingObject) override;
 
    virtual void GetResourceSizeEx(FResourceSizeEx& CumulativeResourceSize) override;
protected:
    void ForEachActiveRuntimeCell(TFunctionRef<void(const UWorldPartitionRuntimeCell*)> Func) const;
 
private:
    const FName* FindCellNameForSubObject(const FString& InSubObjectString, bool bInResolveContainers, FString& OutSubObjectString, const UObject*& OutLevelMountPointContext, UObject*& OutCellOuter) const;
 
    UPROPERTY()
    FTopLevelAssetPath SourceWorldAssetPath;
 
    UPROPERTY()
    TMap<FName, FName> SubObjectsToCellRemapping;
 
    UPROPERTY()
    FWorldPartitionRuntimeContainerResolver ContainerResolver;
 
    UPROPERTY(Transient)
    TArray<TWeakObjectPtr<URuntimeHashExternalStreamingObjectBase>> ExternalStreamingObjects;
 
    UPROPERTY(Transient)
    TMap<FName, TWeakObjectPtr<URuntimeHashExternalStreamingObjectBase>> SubObjectsToExternalStreamingObjectsRemapping;
};