MovieScene3DTransformTrack.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "Tracks/MovieScenePropertyTrack.h"
#include "Sections/MovieScene3DTransformSection.h"
#include "EntitySystem/IMovieSceneBlenderSystemSupport.h"
#include "MovieScene3DTransformTrack.generated.h"
 
enum class EMovieSceneTransformChannel : uint32;
class UMovieScene3DTransformSection;
struct FMovieSceneInterrogationKey;
 
struct FTrajectoryKey
{
    struct FData
    {
        FData(UMovieScene3DTransformSection* InSection, TOptional<FKeyHandle> InKeyHandle, ERichCurveInterpMode InInterpMode, FName InChannelName)
            : Section(InSection), KeyHandle(InKeyHandle), ChannelName(InChannelName), InterpMode(InInterpMode)
        {}
 
        TWeakObjectPtr<UMovieScene3DTransformSection> Section;
        TOptional<FKeyHandle> KeyHandle;
        FName ChannelName;
        ERichCurveInterpMode InterpMode;
    };
 
    FTrajectoryKey(FFrameNumber InTime) : Time(InTime) {}
 
    bool Is(ERichCurveInterpMode InInterpMode) const
    {
        if (KeyData.Num())
        {
            for (const FData& Value : KeyData)
            {
                if (Value.InterpMode != InInterpMode)
                {
                    return false;
                }
            }
            return true;
        }
        return false;
    }
 
    FFrameNumber Time;
 
    TArray<FData, TInlineAllocator<1>> KeyData;
};
 
UCLASS(MinimalAPI)
class UMovieScene3DTransformTrack
    : public UMovieScenePropertyTrack
    , public IMovieSceneBlenderSystemSupport
{
    GENERATED_UCLASS_BODY()
 
public:
 
    // UMovieSceneTrack interface
 
    virtual bool SupportsType(TSubclassOf<UMovieSceneSection> SectionClass) const override;
    virtual UMovieSceneSection* CreateNewSection() override;
 
#if WITH_EDITORONLY_DATA
    virtual bool CanRename() const override { return true; }
    virtual FText GetDisplayName() const override;
#endif
 
    // IMovieSceneBlenderSystemSupport
    TSubclassOf<UMovieSceneBlenderSystem> GetBlenderSystem() const override;
    void SetBlenderSystem(TSubclassOf<UMovieSceneBlenderSystem> BlenderSystemClass) override;
    void GetSupportedBlenderSystems(TArray<TSubclassOf<UMovieSceneBlenderSystem>>& OutSystemClasses) const override;
 
#if WITH_EDITOR
 
    MOVIESCENETRACKS_API TArray<FTrajectoryKey> GetTrajectoryData(FFrameNumber Time, int32 MaxNumDataPoints, TRange<FFrameNumber>) const;
    MOVIESCENETRACKS_API FSlateColor GetLabelColor(const FMovieSceneLabelParams& LabelParams) const override;
#endif
 
private:
 
    UPROPERTY()
    TSubclassOf<UMovieSceneBlenderSystem> BlenderSystemClass;
};