UMovieSceneDeferredComponentMovementSystem | Unreal Engine 5.7 Documentation

API > API/Runtime > API/Runtime/MovieSceneTracks

System that maintains a FScopedMovementUpdate for any USceneComponent that has an animated transform or attachment for the duration of the evaluation to avoid repeatedly updating child transforms and/or overlaps.

This system can be enabled/disabled using the cvar Sequencer.DeferMovementUpdates (is disabled by default) Output logging options are controlled by Sequencer.OutputDeferredMovementMode which is useful for tracking how many components are being moved in any given frame.

This system runs in the Initialization and Evaluaion phases: Initialization: Gathers and initializes deferred movement for any AttachParent components that need (un)link Evaluation: Gathers and initializes deferred movement for any Component Transforms; queues up an event trigger to be executed at the end of the phase Finalization: Applys all pending movement updates in reverse order


Name	UMovieSceneDeferredComponentMovementSystem
Type	class
Header File	/Engine/Source/Runtime/MovieSceneTracks/Public/Systems/MovieSceneDeferredComponentMovementSystem.h
Include Path	#include "Systems/MovieSceneDeferredComponentMovementSystem.h"

Syntax

UCLASS (MinimalAPI)  
class UMovieSceneDeferredComponentMovementSystem : public UMovieSceneEntitySystem

Inheritance Hierarchy

UObjectBase → UObjectBaseUtility → UObject → UMovieSceneEntitySystem → UMovieSceneDeferredComponentMovementSystem

Constructors

Name	Remarks	Include Path	Unreal Specifiers
UMovieSceneDeferredComponentMovementSystem ( const FObjectInitializer& ObjInit )		Systems/MovieSceneDeferredComponentMovementSystem.h

Structs

Name	Remarks
FScopedMovementUpdateContainer	Struct that allows us to use FScopedMovementUpdate on the heap
FScopedSequencerMovementUpdate	WARNING: FScopedMovementUpdate is very specifically designed with strict ordering constraints on its constructor and destructor.

Variables

Protected

Name	Type	Remarks	Include Path	Unreal Specifiers
ScopedUpdates	TChunkedArray< TOptional< FScopedMovementUpdateContainer >, 8192 >	Chunked array of movement updates to ensure that once allocated, a movement update's address can never change	Systems/MovieSceneDeferredComponentMovementSystem.h

Functions

Public

Name	Remarks	Include Path	Unreal Specifiers
void DeferMovementUpdates ( USceneComponent* InComponent )	Request that movement updates for the specified component be deferred until the end of the evaluation	Systems/MovieSceneDeferredComponentMovementSystem.h

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