static void DoAdjustmentForPrediction()
{
//if client prediction is enabled, input is sampled in fixed updated
//so we only adjust fixed update delta time
//error = actual server frame number - predicted server frame number
if (_avgPredictionError > 1)
{
//predicted is less than actual
//local should run faster so local can predicter a larger frame numbers
internalFixedDeltaTime = internalFixedDeltaTime * FrameSyncConstant.DYNAMIC_ADJUST_STEP;
if (internalFixedDeltaTime < _minDeltaTime)
{
internalFixedDeltaTime = _minDeltaTime;
}
SWConsole.Warn($"Adjust FASTER internalFixedDeltaTime={internalFixedDeltaTime}");
}
else if (_avgPredictionError < -1)
{
//predicted is greater than actual
//local should run slower so local can predict smaller frame numbers
internalFixedDeltaTime = internalFixedDeltaTime / FrameSyncConstant.DYNAMIC_ADJUST_STEP;
if (internalFixedDeltaTime > _maxDeltaTime)
{
internalFixedDeltaTime = _maxDeltaTime;
}
SWConsole.Warn($"Adjust SLOWER internalFixedDeltaTime={internalFixedDeltaTime}");
}
}
void SetSaveHandler(int skipSaveIndex)
{
SWConsole.Warn($"SetSaveHandler skipSaveIndex={skipSaveIndex}");
if (_game.replayFileName != null)
{
if (_saveHandler != null)
{
inputFrameDeltas.SetSaveDataHandler(_saveHandler, InputFrameDelta.DataSize);
inputFrameDeltas.SetSkipSaveIndex(skipSaveIndex);
}
}
}
public static bool Adjust(int predictionError, float deltaTime)
{
_adjustTimer += deltaTime;
if (_adjustTimer > _adjustInterval)
{
_adjustTimer = 0;
SWConsole.Warn($"======================Adjust=======================");
//SWConsole.Warn($"Adjust serverPlayerFrameCount={serverPlayerFrameCount} localServerFrameCount={localServerFrameCount}");
UpdatePredictionError(predictionError);
//SWConsole.Warn($"Adjust AVG _avgServerPlayerFrameCount={_avgServerPlayerFrameCount} _avgLocalServerFrameCount={_avgLocalServerFrameCount}");
DoAdjustmentForPrediction();
return(true);
}
return(false);
}
void WaitingForInitialSystemData()
{
if (HasNewInitialInputFrameDeltas())
{
//play all initial input frame
SWConsole.Crit($"WaitingForInitialSystemData has initial input deltas startFrameNumber={_startFrameNumber}");
InputFrame inputFrame1 = new InputFrame();
InputFrame inputFrame2 = new InputFrame();
int frameNumber = _startFrameNumber + 1; //if start number is 1 delta, we need to simulate 2 because 2 = 1 input + 1 delta
foreach (InputFrameDelta delta in _initialInputFrameDeltas)
{
inputFrame2.ResetBytes();
delta.Apply(_input, inputFrame1, inputFrame2);
FrameSyncUpdateType updateType = FrameSyncUpdateType.Restore;
SWConsole.Crit($"WaitingForInitialSystemData simulate {frameNumber}");
DoSimulate(updateType, inputFrame2, frameNumber);
InputFrame temp = inputFrame1;
inputFrame1 = inputFrame2;
inputFrame2 = temp;
frameNumber++;
}
//start from the last restored frame;
frameNumber--;
_currentInputFrameNumber = frameNumber;
ExportSimulationResult();
//create an empty input frame to start with
inputFrames[frameNumber] = inputFrame1;
//export system data
ExportSimulationResult();
SWConsole.Warn($"WaitingForInitialSystemData _initialInputFramesData={_initialInputFramesData.DataLength}");
_saveHandler(_initialInputFramesData, _startFrameNumber, _endFrameNumber);
_game.gameState = FrameSyncGameState.Running;
SetSaveHandler(_endFrameNumber - 1); //end frame was excluded from initial frames, so we want to save it
SWConsole.Crit($"WaitingForInitialSystemData game is running now _currentInputFrameNumber={_currentInputFrameNumber}");
ResetTimeStamp();
return;
}
}
void RunningOnlineWithPrediction()
{
SWConsole.Crit("Engine: ================RunningOnlineWithPrediction=================");
//FlushInputOnlinePrediction();
// check if we got new server frame to simulate
int nextServerFrame = _currentInputFrameNumber + 1;
if (true) //CanSimulateInputFrame(nextServerFrame))
{
// restore the last simulated server frame before simulate any new server frame
RestoreToConfirmedFrame();
}
int lastSimulatedPlayerFrameNumber = 0;
// simulate all server frames first
for (; nextServerFrame <= _lastReceivedInputFrameDeltaNumber + 1; nextServerFrame++)
{
if (CanSimulateInputFrame(nextServerFrame))
{
lastSimulatedPlayerFrameNumber = SimulateInputFrame(nextServerFrame);
SWConsole.Crit($"lastSimulatedPlayerFrameNumber={lastSimulatedPlayerFrameNumber}");
if (lastSimulatedPlayerFrameNumber == 0)
{
// local player's input frame missing for this frame
if (_nextPlayerFrameNumberToConfirm > 1)
{
SWConsole.Warn("wtf");
}
}
else
{
_nextPlayerFrameNumberToConfirm = lastSimulatedPlayerFrameNumber + 1;
SWConsole.Crit($"nextPlayerFrameNumberToConfirm={_nextPlayerFrameNumberToConfirm}");
}
ExportSimulationResult();
}
else
{
break;
}
}
// if last simulated server frame has local player's input
// we should simulate all player's input frames after it
if (true) // lastSimulatedPlayerFrameNumber > 0)
{
InputFrame lastInputFrame = inputFrames[nextServerFrame - 1];
lastInputFrame.Copy(_lastInputFrameForPrediction);
int startPlayerFrameNumber = _nextPlayerFrameNumberToConfirm;
int endPlayerFrameNumber = _currentLocalInputFrameDeltaNumber - FrameSyncConstant.PREDICTION_GLOBAL_DEBAY_FRAMES;
int predictFrameNumber = nextServerFrame;
SWConsole.Crit($"startPlayerFrameNumber={startPlayerFrameNumber}");
SWConsole.Crit($"endPlayerFrameNumber={endPlayerFrameNumber}");
// endPlayerFrameNumber + 1 to include the endPlayerFrameNumber
for (int i = startPlayerFrameNumber; i < endPlayerFrameNumber + 1; i++)
{
Predict(i, predictFrameNumber);
predictFrameNumber++;
//swap prediction InputFrames for the next prediction
InputFrame temp = _lastInputFrameForPrediction;
_lastInputFrameForPrediction = _inputFrameForPrediction;
_inputFrameForPrediction = temp;
}
}
//reset game.frameNumber to the last confirmed frame
//this is for debug server
_game.frameNumber = _currentInputFrameNumber;
SWConsole.Crit("Engine: ================end=================");
}