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"""
Copyright (c) 2021 Eyeware Tech SA http://www.eyeware.tech
This file provides an example on how to receive head and eye tracking data
from Beam SDK.
Dependencies:
- Python 3.6
- NumPy
"""
from eyeware.client import TrackerClient
import time
import numpy as np
# Build tracker client, to establish a communication with the tracker server (an Eyeware application).
#
# Constructing the tracker client object without arguments sets a default server hostname and port which
# work fine in many configurations.
# However, it is possible to set a specific hostname and port, depending on your setup and network.
# See the TrackerClient API reference for further information.
tracker = TrackerClient()
# Run forever, until we press ctrl+c
while True:
# Make sure that the connection with the tracker server (Eyeware application) is up and running.
if tracker.connected:
print(" * Head Pose:")
head_pose = tracker.get_head_pose_info()
head_is_lost = head_pose.is_lost
print(" - Lost track: ", head_is_lost)
if not head_is_lost:
print(" - Session ID: ", head_pose.track_session_uid)
rot = head_pose.transform.rotation
print(" - Rotation: |%5.3f %5.3f %5.3f|" % (rot[0, 0], rot[0, 1], rot[0, 2]))
print(" |%5.3f %5.3f %5.3f|" % (rot[1, 0], rot[1, 1], rot[1, 2]))
print(" |%5.3f %5.3f %5.3f|" % (rot[2, 0], rot[2, 1], rot[2, 2]))
tr = head_pose.transform.translation
print(" - Translation: <x=%5.3f m, y=%5.3f m, z=%5.3f m>" % (tr[0], tr[1], tr[2]))
print(" * Gaze on Screen:")
screen_gaze = tracker.get_screen_gaze_info()
screen_gaze_is_lost = screen_gaze.is_lost
print(" - Lost track: ", screen_gaze_is_lost)
if not screen_gaze_is_lost:
print(" - Screen ID: ", screen_gaze.screen_id)
print(" - Coordinates: <x=%5.3f px, y=%5.3f px>" % (screen_gaze.x, screen_gaze.y))
print(" - Confidence: ", screen_gaze.confidence)
time.sleep(1 / 30) # We expect tracking data at 30 Hz
else:
# Print a message every MESSAGE_PERIOD_IN_SECONDS seconds
MESSAGE_PERIOD_IN_SECONDS = 2
time.sleep(MESSAGE_PERIOD_IN_SECONDS - time.monotonic() % MESSAGE_PERIOD_IN_SECONDS)
print("No connection with tracker server")
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