message: Accumulate elapsed time for timestamp
diff: @@ -183,10 +183,10 @@ void AVehiclePawn::Tick(float DeltaSeconds)
  float quat[4] = {+_quat.W, -_quat.X, -_quat.Y, +_quat.Z};
  _quatNoise.addNoise(quat);
  float gyro[3] = { _gyro.X, _gyro.Y, _gyro.Z };
  - float timestamp = 0; // XXX
  float position[3] = {0,0,0}; // XXX
  float velocity[3] = {0,0,0}; // XXX
  - _flightController->update(timestamp, position, velocity, quat, gyro, _motorvals);
  + _flightController->update(_elapsedTime, position, velocity, quat, gyro, _motorvals);
  + debug("%f", _elapsedTime);
  // Compute body-frame roll, pitch, yaw velocities based on differences between motors
  float forces[3];
  @@ -242,6 +242,9 @@ void AVehiclePawn::Tick(float DeltaSeconds)
  //debug("Server connected");
  }
  + // Accumulate elapsed time
  + _elapsedTime += DeltaSeconds;
  +
  // Call any parent class Tick implementation
  Super::Tick(DeltaSeconds);
  }
  