Semplice: stampare su un file due incognite X e Y

private void tetClientEvents_OnGazeData(ref TetGazeData gazeData)
    {
      float x, y, distance;

      // Use data only if both left and right eye was found by the eye tracker
      if (gazeData.validity_lefteye == 0 && gazeData.validity_righteye == 0) 
      {
        // Let the x, y and distance be the right and left eye average
        x = (gazeData.x_gazepos_lefteye + gazeData.x_gazepos_righteye) / 2;
        y = (gazeData.y_gazepos_lefteye + gazeData.y_gazepos_righteye) / 2;
        distance = (gazeData.distance_lefteye + gazeData.distance_righteye) / 2;