def update_psychopy_pupil_clock_offset(self):
time_before = Computer.getTime()
time_pupil_at_pupil_clock_reading = self.get_pupil_time()
time_after = Computer.getTime()
time_psychopy_at_pupil_clock_reading = (time_before + time_after) / 2.0
self._psychopy_pupil_clock_offset = (
time_pupil_at_pupil_clock_reading -
time_psychopy_at_pupil_clock_reading)
def _poll(self):
if not self.isConnected():
return
logged_time = Computer.getTime()
for topic, payload in self._pupil_remote.fetch():
if topic.startswith("gaze.3d."):
self._cache_gaze_datum(topic, payload)
if topic == self.surface_topic:
for gaze_on_surface in payload["gaze_on_surfaces"]:
if gaze_on_surface["on_surf"] is not True:
continue
if gaze_on_surface[
"confidence"] < self._confidence_threshold:
continue
gaze_datum = self._lookup_corresponding_gaze_datum(
gaze_on_surface)
if gaze_datum is None:
continue # Skip surface-mapped gaze if no gaze is avalable
self._add_gaze_sample(
gaze_on_surface_datum=gaze_on_surface,
gaze_datum=gaze_datum,
logged_time=logged_time,
)
if (topic.startswith("pupil")
and payload["confidence"] < self._confidence_threshold):
self._add_pupil_sample(pupil_datum=payload,
logged_time=logged_time)
def trackerTime(self) -> float:
"""Returns the current time reported by the eye tracker device.
Implementation measures the current time in PsychoPy time and applies the
estimated clock offset to transform the measurement into tracker time.
:return: The eye tracker hardware's reported current time.
"""
return self._psychopyTimeInTrackerTime(Computer.getTime())
def trackerTime(self):
"""trackerTime returns the current time reported by the eye tracker
device. The time base is implementation dependent.
Args:
None
Return:
float: The eye tracker hardware's reported current time.
"""
return self._psychopyTimeInTrackerTime(Computer.getTime())
def _handleNativeEvent(self, *args, **kwargs):
"""This method is called every time there is new eye data available
from the Tobii system, which will be roughly equal to the sampling rate
eye data is being recorded at.
The callback needs to return as quickly as possible so there is
no chance of overlapping calls being made to the callback.
Therefore this method simply puts the event data received from
the eye tracker device, and the local ioHub time the callback
was called, into a buffer for processing by the ioHub event
system.
"""
if self.isReportingEvents():
try:
logged_time = Computer.getTime()
tobii_logged_time = self._tobii.getCurrentLocalTobiiTime(
) * self.DEVICE_TIMEBASE_TO_SEC
eye_data_event = args[0]
data_delay = tobii_logged_time - (
eye_data_event['system_time_stamp'] *
self.DEVICE_TIMEBASE_TO_SEC)
device_event_time = eye_data_event['device_time_stamp']
iohub_event_time = (logged_time - data_delay)
self._addNativeEventToBuffer(
(logged_time, device_event_time, iohub_event_time,
data_delay, eye_data_event))
return True
except Exception:
print2err('ERROR IN _handleNativeEvent')
printExceptionDetailsToStdErr()
else:
print2err(
'self._handleNativeEvent called but isReportingEvents == false'
)
return False
if __name__ == '__main__':
psychopy_pid = None
initial_offset = 0.0
scriptPathDir = None
configFileName = None
prog = sys.argv[0]
if len(sys.argv) >= 2:
initial_offset = float(sys.argv[1])
if len(sys.argv) >= 3:
scriptPathDir = sys.argv[2]
if len(sys.argv) >= 4:
configFileName = sys.argv[3]
if len(sys.argv) >= 5:
psychopy_pid = int(sys.argv[4])
if len(sys.argv) < 2:
psychopy_pid = None
configFileName = None
scriptPathDir = None
initial_offset = Computer.getTime()
if psychopy_pid:
Computer.psychopy_process = psutil.Process(psychopy_pid)
Computer.global_clock = clock.MonotonicClock(initial_offset)
run(rootScriptPathDir=scriptPathDir, configFilePath=configFileName)