MovieSceneTrackInstanceSystem.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/BitArray.h"
#include "Containers/Map.h"
#include "Containers/SparseArray.h"
#include "EntitySystem/MovieSceneEntityIDs.h"
#include "EntitySystem/MovieSceneEntityInstantiatorSystem.h"
#include "EntitySystem/MovieSceneEntitySystem.h"
#include "EntitySystem/MovieSceneEntitySystemTypes.h"
#include "EntitySystem/MovieScenePropertySystemTypes.h"
#include "HAL/Platform.h"
#include "Serialization/Archive.h"
#include "UObject/ObjectMacros.h"
#include "UObject/ObjectPtr.h"
#include "UObject/UObjectGlobals.h"
 
#include "MovieSceneTrackInstanceSystem.generated.h"
 
class UClass;
class UMovieSceneSection;
class UMovieSceneTrackInstance;
class UObject;
 
USTRUCT()
struct FMovieSceneTrackInstanceEntry
{
    GENERATED_BODY()
 
    UPROPERTY()
    TObjectPtr<UObject> BoundObject = nullptr;
 
    UPROPERTY()
    TObjectPtr<UMovieSceneTrackInstance> TrackInstance = nullptr;
};
 
 
UCLASS(MinimalAPI)
class UMovieSceneTrackInstanceInstantiator : public UMovieSceneEntityInstantiatorSystem
{
    GENERATED_BODY()
 
public:
 
    MOVIESCENE_API UMovieSceneTrackInstanceInstantiator(const FObjectInitializer& ObjInit);
 
    MOVIESCENE_API int32 MakeOutput(UObject* BoundObject, UClass* TrackInstanceClass);
 
    MOVIESCENE_API int32 FindOutput(UObject* BoundObject, UClass* TrackInstanceClass) const;
 
    const TSparseArray<FMovieSceneTrackInstanceEntry>& GetTrackInstances() const
    {
        return TrackInstances;
    }
 
    static MOVIESCENE_API void AddReferencedObjects(UObject* InThis, FReferenceCollector& Collector);
 
private:
 
    MOVIESCENE_API virtual void OnLink() override final;
    MOVIESCENE_API virtual void OnUnlink() override final;
    MOVIESCENE_API virtual void OnRun(FSystemTaskPrerequisites& InPrerequisites, FSystemSubsequentTasks& Subsequents) override final;
 
    MOVIESCENE_API virtual void OnTagGarbage() override;
    MOVIESCENE_API virtual void OnCleanTaggedGarbage() override;
 
    MOVIESCENE_API virtual void Serialize(FArchive& Ar) override;
 
    TSparseArray<FMovieSceneTrackInstanceEntry> TrackInstances;
    TMultiMap<TObjectPtr<UObject>, int32> BoundObjectToInstances;
 
    TBitArray<> InvalidatedOutputs;
 
    int32 ChildInitializerIndex;
};
 
 
UCLASS(MinimalAPI)
class UMovieSceneTrackInstanceSystem : public UMovieSceneEntitySystem
{
    GENERATED_BODY()
 
    UMovieSceneTrackInstanceSystem(const FObjectInitializer& ObjInit);
 
private:
 
    MOVIESCENE_API virtual void OnLink() override final;
    MOVIESCENE_API virtual void OnSchedulePersistentTasks(UE::MovieScene::IEntitySystemScheduler* TaskScheduler) override final;
    MOVIESCENE_API virtual void OnRun(FSystemTaskPrerequisites& InPrerequisites, FSystemSubsequentTasks& Subsequents) override final;
 
    void EvaluateAllInstances();
 
    UPROPERTY()
    TObjectPtr<UMovieSceneTrackInstanceInstantiator> Instantiator;
};