public SyncTestsBackrollSession(BackrollSessionConfig config, int frames)
{
_callbacks = config.Callbacks;
_num_players = config.Players.Length;
_check_distance = frames;
_last_verified = 0;
_rollingback = false;
_running = false;
_current_input.Clear();
_sync = new Sync(null, new Sync.Config {
NumPredictionFrames = BackrollConstants.kMaxPredictionFrames
});
}
public bool GetInput(int requested_frame, out GameInput input)
{
Debug.LogFormat("requesting input frame {}.", requested_frame);
// No one should ever try to grab any input when we have a prediction
// error. Doing so means that we're just going further down the wrong
// path. Assert.IsTrue this to verify that it's true.
Assert.IsTrue(_firstIncorrectFrame == GameInput.kNullFrame);
// Remember the last requested frame number for later. We'll need
// this in AddInput() to drop out of prediction mode.
_lastFrameRequested = requested_frame;
Assert.IsTrue(requested_frame >= _inputs[_tail].Frame);
if (_prediction.Frame == GameInput.kNullFrame)
{
// If the frame requested is in our range, fetch it out of the queue and
// return it.
int offset = requested_frame - _inputs[_tail].Frame;
if (offset < _length)
{
offset = (offset + _tail) % _inputs.Length;
Assert.IsTrue(_inputs[offset].Frame == requested_frame);
input = _inputs[offset];
Debug.LogFormat("returning confirmed frame number {}.", input.Frame);
return(true);
}
// The requested frame isn't in the queue. Bummer. This means we need
// to return a prediction frame. Predict that the user will do the
// same thing they did last time.
if (requested_frame == 0)
{
Debug.Log("basing new prediction frame from nothing, you're client wants frame 0.");
_prediction.Clear();
}
else if (_lastAddedFrame == GameInput.kNullFrame)
{
Debug.Log("basing new prediction frame from nothing, since we have no frames yet.");
_prediction.Clear();
}
else
{
Debug.LogFormat("basing new prediction frame from previously added frame (queue entry:{}, frame:{}).",
PreviousFrame(_head), _inputs[PreviousFrame(_head)].Frame);
_prediction = _inputs[PreviousFrame(_head)];
}
_prediction.Frame++;
}
Assert.IsTrue(_prediction.Frame >= 0);
// If we've made it this far, we must be predicting. Go ahead and
// forward the prediction frame contents. Be sure to return the
// frame number requested by the client, though.
input = _prediction;
input.Frame = requested_frame;
Debug.LogFormat("returning prediction frame number {} ({}).", input.Frame, _prediction.Frame);
return(false);
}
