MovieSceneConstraintSystem.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "EntitySystem/MovieSceneEntitySystem.h"
#include "MovieSceneConstraintSystem.generated.h"
 
class UTransformableComponentHandle;
class UTickableTransformConstraint;
 
namespace UE::MovieScene
{
    struct FEvaluateConstraintChannels;
}
 
UCLASS(MinimalAPI)
class UMovieSceneConstraintSystem : public UMovieSceneEntitySystem
{
public:
 
    GENERATED_BODY()
    //if constraint has a dynamic offset we need to make sure the constraint get's notified the handle is updated
    struct FUpdateHandleForConstraint
    {
        TWeakObjectPtr<UTickableTransformConstraint> Constraint;
        TWeakObjectPtr<UTransformableComponentHandle> TransformHandle;
    };
 
    MOVIESCENETRACKS_API UMovieSceneConstraintSystem(const FObjectInitializer& ObjInit);
    MOVIESCENETRACKS_API virtual void OnSchedulePersistentTasks(UE::MovieScene::IEntitySystemScheduler* TaskScheduler) override;
    MOVIESCENETRACKS_API virtual void OnRun(FSystemTaskPrerequisites& InPrerequisites, FSystemSubsequentTasks& Subsequents) override;
 
protected:
    friend UE::MovieScene::FEvaluateConstraintChannels;
 
    TArray<FUpdateHandleForConstraint>  DynamicOffsets;
};