MovieSceneTrackEvaluator.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Containers/Map.h"
#include "Containers/SortedMap.h"
#include "UObject/GCObject.h"
#include "MovieSceneSequenceID.h"
#include "Compilation/MovieSceneCompiledDataID.h"
#include "Evaluation/MovieSceneExecutionTokens.h"
#include "Evaluation/MovieSceneEvaluationField.h"
#include "Evaluation/MovieSceneRootOverridePath.h"
 
struct FMovieSceneContext;
struct FMovieSceneSubSequenceData;
struct FMovieSceneEvaluationGroup;
struct FMovieSceneEvaluationTemplate;
struct FMovieSceneBlendingAccumulator;
struct FDelayedPreAnimatedStateRestore;
 
class IMovieScenePlayer;
class UMovieSceneSequence;
class UMovieSceneCompiledDataManager;
 
struct FMovieSceneTrackEvaluator : FGCObject
{
    FMovieSceneTrackEvaluator(UMovieSceneSequence* InRootSequence, FMovieSceneCompiledDataID InRootCompiledDataID, UMovieSceneCompiledDataManager* InCompiledDataManager);
    ~FMovieSceneTrackEvaluator();
 
    void Evaluate(FMovieSceneContext Context, IMovieScenePlayer& Player, FMovieSceneSequenceID OverrideRootID = MovieSceneSequenceID::Root);
 
    void Finish(IMovieScenePlayer& Player);
 
    void InvalidateCachedData();
 
public:
 
    MOVIESCENE_API UMovieSceneSequence* GetSequence(FMovieSceneSequenceIDRef SequenceID) const;
 
    const FMovieSceneEvaluationMetaData& GetThisFrameMetaData() const
    {
        return ThisFrameMetaData;
    }
 
    MOVIESCENE_API void CopyActuators(FMovieSceneBlendingAccumulator& Accumulator) const;
 
private:
 
    const FMovieSceneEvaluationGroup* SetupFrame(UMovieSceneSequence* OverrideRootSequence, FMovieSceneSequenceID InOverrideRootID, FMovieSceneContext Context);
 
    void CallSetupTearDown(IMovieScenePlayer& Player, FDelayedPreAnimatedStateRestore* DelayedRestore = nullptr);
 
    void EvaluateGroup(const FMovieSceneEvaluationGroup& Group, const FMovieSceneContext& Context, IMovieScenePlayer& Player);
 
    void ConstructEvaluationPtrCache();
 
    virtual void AddReferencedObjects(FReferenceCollector& Collector) override;
    virtual FString GetReferencerName() const override
    {
        return TEXT("FMovieSceneTrackEvaluator");
    }
 
private:
 
    struct FCachedPtrs
    {
        UMovieSceneSequence*                 Sequence;
        const FMovieSceneEvaluationTemplate* Template;
        const FMovieSceneSubSequenceData*    SubData;
    };
 
    TSortedMap<FMovieSceneSequenceID, FCachedPtrs, TInlineAllocator<8>> CachedPtrs;
 
    TWeakObjectPtr<UMovieSceneSequence> RootSequence;
 
    FMovieSceneCompiledDataID RootCompiledDataID;
 
    FMovieSceneSequenceID RootID;
 
    FMovieSceneEvaluationMetaData LastFrameMetaData;
    FMovieSceneEvaluationMetaData ThisFrameMetaData;
 
    TObjectPtr<UMovieSceneCompiledDataManager> CompiledDataManager;
 
    UE::MovieScene::FSubSequencePath RootOverridePath;
 
    FMovieSceneExecutionTokens ExecutionTokens;
 
    uint32 CachedReallocationVersion;
};