MovieSceneBlenderSystem.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/BitArray.h"
#include "EntitySystem/MovieSceneBlenderSystemTypes.h"
#include "EntitySystem/MovieSceneEntitySystem.h"
#include "Math/NumericLimits.h"
#include "Misc/AssertionMacros.h"
#include "Templates/SubclassOf.h"
#include "UObject/ObjectMacros.h"
#include "UObject/UObjectGlobals.h"
 
#include "MovieSceneBlenderSystem.generated.h"
 
class UMovieSceneEntitySystemLinker;
class UObject;
 
UCLASS(Abstract, MinimalAPI)
class UMovieSceneBlenderSystem : public UMovieSceneEntitySystem
{
public:
 
    GENERATED_BODY()
 
    
    static constexpr int32 DefaultPriority = 0;
 
    static MOVIESCENE_API TSubclassOf<UMovieSceneBlenderSystem> GetBlenderSystemClass(FMovieSceneBlenderSystemID InSystemID);
 
    template<typename BlenderSystemClass>
    static FMovieSceneBlenderSystemID GetBlenderSystemID()
    {
        UMovieSceneBlenderSystem* DefaultObject = BlenderSystemClass::StaticClass()->template GetDefaultObject<UMovieSceneBlenderSystem>();
        check(DefaultObject);
        return DefaultObject->SystemID;
    }
 
    MOVIESCENE_API FMovieSceneBlenderSystemID GetBlenderSystemID() const;
 
    MOVIESCENE_API FMovieSceneBlendChannelID AllocateBlendChannel();
 
    MOVIESCENE_API void ReleaseBlendChannel(FMovieSceneBlendChannelID BlendChannelID);
 
    int32 GetSelectionPriority() const
    {
        return SelectionPriority;
    }
 
    UE::MovieScene::FComponentTypeID GetBlenderTypeTag() const
    {
        return BlenderTypeTag;
    }
 
protected:
 
    MOVIESCENE_API UMovieSceneBlenderSystem(const FObjectInitializer& ObjInit);
 
    MOVIESCENE_API virtual bool IsRelevantImpl(UMovieSceneEntitySystemLinker* InLinker) const override;
 
    MOVIESCENE_API void CompactBlendChannels();
 
    TBitArray<> AllocatedBlendChannels;
 
    int32 SelectionPriority;
 
private:
 
    FMovieSceneBlenderSystemID SystemID;
 
    UE::MovieScene::FComponentTypeID BlenderTypeTag;
};