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Questions#

  • What’s the networking architecture?
  • How do you do rollback? Rollforth? How do you implement that in abilities?
  • Are only locally predicted cues predicted?
  • Has it been used in melee combat setting?
  • How would you implement input buffering? Cancelling? Waiting for server to ack/nack hold down button & charge?

BBR Specific#

For rollback/rollforth:

  • C:\ikrima\src\knl\Bebylon\UnrealEngine\Engine\Source\Runtime\MovieScene\Public\MovieSceneTimeController.h

  • TSharedPtr TimeController; on level sequence

  • UTimecodeProvider

  • FMovieSceneTimeController

  • PlaybackSettings.TimeController,

  • FMovieSceneTimeController,

  • FMovieSceneTimeController_AudioClock

  • FMovieSceneTimeController_PlatformClock

  • FMovieSceneTimeController_Tick

  • FMovieSceneTimeController_FrameStep

  • UAutomatedLevelSequenceCapture::FMovieSceneTimeController_FrameStep

  • class TIMEMANAGEMENT_API UFixedFrameRateCustomTimeStep : public UEngineCustomTimeStep

UMovieScene::EUpdateClockSource ClockSource; MovieScene->GetTickResolution(); MovieScene->GetDisplayRate(); PlayPosition.SetTimeBase(DisplayRate, TickResolution, EvaluationType);

  {
    // Set up the default frame range from the sequence's play range
    TRange<FFrameNumber> PlaybackRange   = MovieScene->GetPlaybackRange();

    const FFrameNumber SrcStartFrame = MovieScene::DiscreteInclusiveLower(PlaybackRange);
    const FFrameNumber SrcEndFrame   = MovieScene::DiscreteExclusiveUpper(PlaybackRange);

    const FFrameNumber StartingFrame = ConvertFrameTime(SrcStartFrame, TickResolution, DisplayRate).FloorToFrame();
    const FFrameNumber EndingFrame   = ConvertFrameTime(SrcEndFrame,   TickResolution, DisplayRate).FloorToFrame();

    SetFrameRange(StartingFrame.Value, (EndingFrame - StartingFrame).Value);
  }

Last update: November 14, 2019