ACharacter::ServerMoveOld

function Engine Deprecated Since 4.0

Deprecated: Use ServerMovePacked instead.

#include "GameFramework/Character.h"

Access: public Specifiers: UFUNCTIONunreliableserverWithValidation

Description

Resends an important old move to the server when the client suspects it was dropped. The server processes it only if it has not already been acknowledged.

Caveats & Gotchas

• Deprecated in favour of ServerMovePacked. The packed path handles old-move retransmission internally.
• The server checks whether OldTimeStamp has already been processed before applying the move; duplicate processing is guarded against by the timestamp comparison in CharacterMovementComponent.
• Only acceleration and flags are resent — client location is not included, so the server re-simulates the old move from its own saved state rather than accepting the client's location.

Signature

ENGINE_API void ServerMoveOld(float OldTimeStamp, FVector_NetQuantize10 OldAccel, uint8 OldMoveFlags)

Parameters

Name	Type	Description	Default
OldTimeStamp	float	Timestamp of the old move being resent.	—
OldAccel	FVector_NetQuantize10	Acceleration of the old move.	—
OldMoveFlags	uint8	Compressed move flags of the old move.	—

Return Type

void

Example

Internally managed by CharacterMovementComponent C++

// ServerMoveOld is dispatched automatically by CharacterMovementComponent
// when a previously sent move has not been acknowledged and the client
// suspects packet loss. You rarely override this; to monitor resends:
void AMyCharacter::ServerMoveOld_Implementation(
    float OldTimeStamp, FVector_NetQuantize10 OldAccel, uint8 OldMoveFlags)
{
    UE_LOG(LogTemp, Verbose, TEXT("Resending old move ts=%.3f"), OldTimeStamp);
    Super::ServerMoveOld_Implementation(OldTimeStamp, OldAccel, OldMoveFlags);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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