I have recorded gaze data using Psychopy/iohub and a Tobii TX300 eye tracker. Loading the hdf5 file shows the following entries in a BinocularEyeSampleEvent:
['experiment_id', 'session_id', 'device_id', 'event_id', 'type', 'device_time', 'logged_time', 'time', 'confidence_interval', 'delay', 'filter_id', 'left_gaze_x', 'left_gaze_y', 'left_gaze_z', 'left_eye_cam_x', 'left_eye_cam_y', 'left_eye_cam_z', 'left_angle_x', 'left_angle_y', 'left_raw_x', 'left_raw_y', 'left_pupil_measure1', 'left_pupil_measure1_type', 'left_pupil_measure2', 'left_pupil_measure2_type', 'left_ppd_x', 'left_ppd_y', 'left_velocity_x', 'left_velocity_y', 'left_velocity_xy' 'right_gaze_x', 'right_gaze_y', 'right_gaze_z', 'right_eye_cam_x', 'right_eye_cam_y', 'right_eye_cam_z', 'right_angle_x', 'right_angle_y', 'right_raw_x', 'right_raw_y', 'right_pupil_measure1', 'right_pupil_measure1_type', 'right_pupil_measure2', 'right_pupil_measure2_type', 'right_ppd_x', 'right_ppd_y', 'right_velocity_x', 'right_velocity_y', 'right_velocity_xy', 'status']
They are different from those described in the official documentation, so where can I find an accurate description of what the data means? For instance, what is PPD, what does a measure type '77' mean or what unit was the velocity measured in? Is there an up-to-date documentation somehwere? ...and, maybe most importantly, which of the entries represent the point of gaze on the screen (taking the calibration into account)?
Found all the answers in this well commented code on github. The constants (like Type 77) can be found here Maybe the PsychoPy devolpers want to link this file in the documentation...?