int Simulate(int frameNumber)
{
SWConsole.Crit($"Engine: Simulate frameNumber={frameNumber}");
InputFrame lastInputFrame = inputFrames[frameNumber - 1];
InputFrameDelta lastInputFrameDelta = inputFrameDeltas[frameNumber - 1];
int playerFrameNumber = lastInputFrameDelta.playerFrameNumber;
InputFrame inputFrame = inputFrames[frameNumber];
if (inputFrame == null)
{
inputFrame = new InputFrame(frameNumber);
inputFrames[frameNumber] = inputFrame;
}
inputFrame.FrameNumber = frameNumber;
inputFrame.ResetBytes();
if (lastInputFrame == null || _input == null || inputFrame == null || lastInputFrameDelta == null)
{
SWConsole.Error($"Engine: Simulate input data is nil {lastInputFrame} {_input} {inputFrame} {lastInputFrameDelta}");
}
lastInputFrameDelta.Apply(_input, lastInputFrame, inputFrame);
FrameSyncUpdateType updateType = FrameSyncUpdateType.Normal;
DoSimulate(updateType, inputFrame, frameNumber);
return(playerFrameNumber);
}
void DoSimulate(FrameSyncUpdateType updateType, InputFrame inputFrame, int frameNumber)
{
//Input manager facing frame data
_currentInputFrame = inputFrame;
//user facing frame number
_game.frameNumber = frameNumber;
//hook for other external systems
//For example, physics engine
if (OnEngineWillSimulateEvent != null)
{
OnEngineWillSimulateEvent();
}
//seed the random number generator
FrameSyncRandom._internal_seed((UInt32)frameNumber);
foreach (SWFrameSyncSystem system in _systems)
{
system.WillUpdate();
}
foreach (SWFrameSyncSystem system in _systems)
{
system.Update(_game, _input, updateType);
}
}
internal void ApplyPrediction(FrameSyncInput input, InputFrame i1, InputFrame i2)
{
//copy i1 to i2
SWBytes.CopyFull(i1.bytes, i2.bytes);
//let input reset
//important to reset triggers
input.InputJustCopied(i2.bytes);
byte inputSize = input.Size;
if (bytes.DataLength > 0)
{
byte playerCount = bytes.PopByte();
for (int i = 0; i < playerCount; i++)
{
byte playerID = bytes.PopByte();
FrameSyncPlayer player = input.GetPlayer(playerID);
byte offset = player.InputOffset;
SWBytes.Copy(bytes, i2.bytes, bytes.ReadIndex, offset, inputSize);
bytes.SkipRead(inputSize);
}
}
//reset read index
bytes.SetReadIndex(0);
//prepare bitarray
input.InputDeltaJustApplied(i2.bytes);
}
internal void Apply(FrameSyncInput input, InputFrame i1, InputFrame i2)
{
//copy i1 to i2
SWBytes.CopyFull(i1.bytes, i2.bytes);
//let input reset
//important to reset triggers
input.InputJustCopied(i2.bytes);
//apply delta for each player
byte inputSize = input.Size;
SWConsole.Crit($"ApplyDelta delta frameNumber={frameNumber} {bytes.FullString()}");
while (bytes.DataLength > 0)
{
byte playerID = bytes.PopByte();
FrameSyncPlayer player = input.GetPlayer(playerID);
if (player == null)
{
SWConsole.Error($"InputFrameDelta Apply: player not found {playerID}");
}
byte offset = player.InputOffset;
SWBytes.Copy(bytes, i2.bytes, bytes.ReadIndex, offset, inputSize);
bytes.SkipRead(inputSize);
}
//reset read index
bytes.SetReadIndex(0);
//prepare bitarray
input.InputDeltaJustApplied(i2.bytes);
}
public FrameSyncEngine()
{
_staticFrameSyncBehaviourManager = new StaticFrameSyncBehaviourManager();
_dynamicFrameSyncBehaviourManager = new DynamicFrameSyncBehaviourManager();
_systems = new SWFrameSyncSystem[2];
_systems[0] = _staticFrameSyncBehaviourManager;
_systems[1] = _dynamicFrameSyncBehaviourManager;
_lastInputFrameForPrediction = new InputFrame();
_inputFrameForPrediction = new InputFrame();
}
void WaitingForRoomFrame()
{
if (_firstFrameReceived > 0)
{
SWConsole.Crit($"WaitingForRoomFrame _firstFrameReceived={_firstFrameReceived}");
InputFrameDelta delta = inputFrameDeltas[_firstFrameReceived];
if (delta != null)
{
SWConsole.Crit($"WaitingForRoomFrame delta not null Delta.frameNumber = {delta.frameNumber}");
if (delta.frameNumber == _firstFrameReceived)
{
if (_firstFrameReceived > 1)
{
_game.gameState = FrameSyncGameState.WaitingForInitialSystemData;
SWConsole.Crit($"WaitingForRoomFrame RequestInputFrames end={_firstFrameReceived}");
_io.RequestInputFrames(1, _firstFrameReceived);
SWConsole.Crit($"WaitingForRoomFrame game WaitingForInitialSystemData now");
}
else
{
//start from 1st frame
_currentInputFrameNumber = 1;
//create an empty input frame to start with
inputFrames[_currentInputFrameNumber] = new InputFrame(_currentInputFrameNumber);
_game.gameState = FrameSyncGameState.Running;
SetSaveHandler(0);
SWConsole.Crit($"WaitingForRoomFrame game running now");
}
ResetTimeStamp();
return;
}
}
}
if (CheckInterval(FrameSyncConstant.SERVER_FRAME_INITIALIZATION_INTERVAL))
{
SWBytes buffer = new SWBytes(32);
buffer.Push(0); //frame number
buffer.Push(0); //predict
byte length = 0;
buffer.Push(length);
_io.SendInputFrameDeltas(buffer, 1, _input.Size);
}
}
void WaitingForInitialSystemData()
{
if (HasNewInitialInputFrameDeltas())
{
//play all initial input frame
SWConsole.Crit($"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($"WaitingForInitialSystemData game is running now _currentInputFrameNumber={_currentInputFrameNumber}");
ResetTimeStamp();
return;
}
}
void InitializingRoomFrame()
{
if (_game.type == FrameSyncGameType.Offline)
{
_game.gameState = FrameSyncGameState.Running;
_lastReceivedInputFrameDeltaNumber = int.MaxValue - 100; //a large number, -100 to make it don't overflow
_currentInputFrameNumber = 1;
InitializeFrames(0);
SetSaveHandler(0);
//create an empty input frame to start with
//input frame delta will be created in the next FlushInput
inputFrames[_currentInputFrameNumber] = new InputFrame(_currentInputFrameNumber);
}
else
{
_io.StartReceivingInputFrame();
_game.gameState = FrameSyncGameState.WaitingForRoomFrame;
ResetTimeStamp();
}
}
void RunningOnlineWithPrediction()
{
SWConsole.Crit("Engine: ================RunningOnlineWithPrediction=================");
//FlushInputOnlinePrediction();
// check if we got new server frame to simulate
int nextServerFrame = _currentInputFrameNumber + 1;
if (true) //CanSimulateInputFrame(nextServerFrame))
{
// restore the last simulated server frame before simulate any new server frame
RestoreToConfirmedFrame();
}
int lastSimulatedPlayerFrameNumber = 0;
// simulate all server frames first
for (; nextServerFrame <= _lastReceivedInputFrameDeltaNumber + 1; nextServerFrame++)
{
if (CanSimulateInputFrame(nextServerFrame))
{
lastSimulatedPlayerFrameNumber = SimulateInputFrame(nextServerFrame);
SWConsole.Crit($"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=================");
}
//Debug
public InputFrame GetInputFrame(int frameNumber)
{
InputFrame inputFrame = inputFrames[frameNumber];
return(inputFrame);
}
internal void Copy(InputFrame other)
{
other.FrameNumber = FrameNumber;
SWBytes.CopyFull(bytes, other.bytes);
}