def _poll(self):
try:
if self._eyegaze_control is None or not self.isRecordingEnabled():
return False
logged_time = Computer.getTime()
current_tracker_time = self.trackerSec()
sample_count_available = self._eyegaze_control.iNPointsAvailable
confidence_interval = logged_time - self._last_poll_time
self._last_poll_time = logged_time
if sample_count_available == 0:
return True
if self._eyegaze_control.iNBufferOverflow > 0:
# Eye Samples were lost.
# TBD what to do here (lof to dataStore log?, log to LC data file?)
print2err(
"\nWARNING: %d EyeGaze Eye Samples Have Been Lost.\n" %
(self._eyegaze_control.iNBufferOverflow))
for i in range(sample_count_available):
pEyeGaze.EgGetData(byref(self._eyegaze_control))
sample_data0 = self._eyegaze_control.pstEgData[0]
device_event_timestamp = sample_data0.dGazeTimeSec
event_delay = current_tracker_time - device_event_timestamp
iohub_time = logged_time - event_delay
pupil_measure1_type = EyeTrackerConstants.PUPIL_RADIUS_MM
if self._camera_count == 1: #monocular
event_type = EventConstants.MONOCULAR_EYE_SAMPLE
eye = EyeTrackerConstants.UNKNOWN_MONOCULAR
gaze_x, gaze_y = sample_data0.iIGaze, sample_data0.iJGaze
pupil_measure1 = sample_data0.fPupilRadiusMm
status = 0
if gaze_x != 0.0 and gaze_y != 0.0 and pupil_measure1 > 0.0:
gaze_x, gaze_y = self._eyeTrackerToDisplayCoords(
(gaze_x, gaze_y))
else:
status = 2
gaze_x, gaze_y = EyeTrackerConstants.UNDEFINED, EyeTrackerConstants.UNDEFINED
pupil_measure1 = 0
#status = int(sample_data0.bGazeVectorFound)
monoSample = [
0, # experiment_id (filled in by ioHub)
0, # session_id (filled in by ioHub)
0, #device id (always 0 now)
Computer._getNextEventID(),
event_type,
device_event_timestamp,
logged_time,
iohub_time,
confidence_interval,
event_delay,
0, # ioHub filter id (always 0 now)
eye,
gaze_x,
gaze_y,
EyeTrackerConstants.UNDEFINED, # gaze z
EyeTrackerConstants.UNDEFINED, # x eye pos in space
EyeTrackerConstants.UNDEFINED, # y eye pos in space
EyeTrackerConstants.UNDEFINED, # z eye pos in space
EyeTrackerConstants.UNDEFINED, # eye angle in head x
EyeTrackerConstants.UNDEFINED, # eye angle in head y
EyeTrackerConstants.
UNDEFINED, # uncalibrated x eye pos
EyeTrackerConstants.
UNDEFINED, # uncalibrated y eye pos
pupil_measure1,
pupil_measure1_type,
EyeTrackerConstants.UNDEFINED, # pupil measure 2
EyeTrackerConstants.
UNDEFINED, # pupil measure 2 type
EyeTrackerConstants.UNDEFINED, # pixels per degree x
EyeTrackerConstants.UNDEFINED, # pixels per degree y
EyeTrackerConstants.UNDEFINED, # sample velocity x
EyeTrackerConstants.UNDEFINED, # sample velocity y
EyeTrackerConstants.UNDEFINED, # 2D sample velocity
status
]
if status == 0:
self._latest_gaze_position = gaze_x, gaze_y
else:
self._latest_gaze_position = None
self._latest_sample = monoSample
self._addNativeEventToBuffer(monoSample)
elif self._camera_count == 2: #binocular
event_type = EventConstants.BINOCULAR_EYE_SAMPLE
sample_data1 = self._eyegaze_control.pstEgData[1]
sample_data4 = self._eyegaze_control.pstEgData[4]
status = 0
left_pupil_measure1 = sample_data4.fPupilRadiusMm
left_gaze_x, left_gaze_y = sample_data4.iIGaze, sample_data4.iJGaze
if left_gaze_x != 0.0 and left_gaze_y != 0.0 and left_pupil_measure1 > 0.0:
left_gaze_x, left_gaze_y = self._eyeTrackerToDisplayCoords(
(left_gaze_x, left_gaze_y))
else:
status = 20
left_pupil_measure1 = 0
left_gaze_x = EyeTrackerConstants.UNDEFINED
left_gaze_y = EyeTrackerConstants.UNDEFINED
right_gaze_x, right_gaze_y = sample_data1.iIGaze, sample_data1.iJGaze
right_pupil_measure1 = sample_data1.fPupilRadiusMm
if right_gaze_x != 0.0 and right_gaze_y != 0.0 and left_pupil_measure1 > 0.0:
right_gaze_x, right_gaze_y = self._eyeTrackerToDisplayCoords(
(right_gaze_x, right_gaze_y))
else:
status += 2
right_pupil_measure1 = 0
right_gaze_x = EyeTrackerConstants.UNDEFINED
right_gaze_y = EyeTrackerConstants.UNDEFINED
#status = int(sample_data4.bGazeVectorFound*2+sample_data1.bGazeVectorFound)
binocSample = [
0, # experiment_id (filled in by ioHub)
0, # session_id (filled in by ioHub)
0, #device id (always 0 now)
Computer._getNextEventID(),
event_type,
device_event_timestamp,
logged_time,
iohub_time,
confidence_interval,
event_delay,
0, # ioHub filter id (always 0 now)
# LEFT EYE DATA
left_gaze_x,
left_gaze_y,
EyeTrackerConstants.UNDEFINED, # gaze z
EyeTrackerConstants.UNDEFINED, # x eye pos in space
EyeTrackerConstants.UNDEFINED, # y eye pos in space
EyeTrackerConstants.UNDEFINED, # z eye pos in space
EyeTrackerConstants.UNDEFINED, # eye angle in head x
EyeTrackerConstants.UNDEFINED, # eye angle in head y
EyeTrackerConstants.
UNDEFINED, # uncalibrated x eye pos
EyeTrackerConstants.
UNDEFINED, # uncalibrated y eye pos
left_pupil_measure1,
pupil_measure1_type,
EyeTrackerConstants.UNDEFINED, # pupil measure 2
EyeTrackerConstants.
UNDEFINED, # pupil measure 2 type
EyeTrackerConstants.UNDEFINED, # pixels per degree x
EyeTrackerConstants.UNDEFINED, # pixels per degree y
EyeTrackerConstants.UNDEFINED, # sample velocity x
EyeTrackerConstants.UNDEFINED, # sample velocity y
EyeTrackerConstants.UNDEFINED, # 2D sample velocity
right_gaze_x,
right_gaze_y,
EyeTrackerConstants.UNDEFINED, # gaze z
EyeTrackerConstants.UNDEFINED, # x eye pos in space
EyeTrackerConstants.UNDEFINED, # y eye pos in space
EyeTrackerConstants.UNDEFINED, # z eye pos in space
EyeTrackerConstants.UNDEFINED, # eye angle in head x
EyeTrackerConstants.UNDEFINED, # eye angle in head y
EyeTrackerConstants.
UNDEFINED, # uncalibrated x eye pos
EyeTrackerConstants.
UNDEFINED, # uncalibrated y eye pos
right_pupil_measure1,
pupil_measure1_type,
EyeTrackerConstants.UNDEFINED, # pupil measure 2
EyeTrackerConstants.
UNDEFINED, # pupil measure 2 type
EyeTrackerConstants.UNDEFINED, # pixels per degree x
EyeTrackerConstants.UNDEFINED, # pixels per degree y
EyeTrackerConstants.UNDEFINED, # sample velocity x
EyeTrackerConstants.UNDEFINED, # sample velocity y
EyeTrackerConstants.UNDEFINED, # 2D sample velocity
status
]
self._latest_sample = binocSample
g = [0.0, 0.0]
if right_pupil_measure1 > 0.0 and left_pupil_measure1 > 0.0:
g = [(left_gaze_x + right_gaze_x) / 2.0,
(left_gaze_y + right_gaze_y) / 2.0]
elif left_pupil_measure1 > 0.0:
g = [left_gaze_x, left_gaze_y]
elif right_pupil_measure1 > 0.0:
g = [right_gaze_x, right_gaze_y]
self._latest_gaze_position = g
self._addNativeEventToBuffer(binocSample)
else: # WTF
print2err(
"ERROR: EyeGaze reported camers count is invalid: ",
self._camera_count)
# Code below can be reused if fixation event detection is added.
#
# elif isinstance(ne,pylink.EndFixationEvent):
# etype=EventConstants.FIXATION_END
#
# estatus = ne.getStatus()
#
# which_eye=ne.getEye()
# if which_eye:
# which_eye=EyeTrackerConstants.RIGHT_EYE
# else:
# which_eye=EyeTrackerConstants.LEFT_EYE
#
# start_event_time= ne.getStartTime()*DEVICE_TIMEBASE_TO_SEC
# end_event_time = ne.event_timestamp
# event_duration = end_event_time-start_event_time
#
# fee=[0,
# 0,
# Computer._getNextEventID(),
# etype,
# ne.event_timestamp,
# ne.logged_time,
# ne.timestamp,
# confidenceInterval,
# ne.event_delay,
# 0,
# which_eye,
# event_duration,
# s_gaze[0],
# s_gaze[1],
# EyeTrackerConstants.UNDEFINED,
# s_href[0],
# s_href[1],
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# s_pupilsize,
# EyeTrackerConstants.PUPIL_AREA,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# s_ppd[0],
# s_ppd[1],
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# s_vel,
# e_gaze[0],
# e_gaze[1],
# EyeTrackerConstants.UNDEFINED,
# e_href[0],
# e_href[1],
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# e_pupilsize,
# EyeTrackerConstants.PUPIL_AREA,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# e_ppd[0],
# e_ppd[1],
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# e_vel,
# a_gaze[0],
# a_gaze[1],
# EyeTrackerConstants.UNDEFINED,
# a_href[0],
# a_href[1],
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# a_pupilsize,
# EyeTrackerConstants.PUPIL_AREA,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# a_vel,
# EyeTrackerConstants.UNDEFINED,
# EyeTrackerConstants.UNDEFINED,
# peak_vel,
# estatus
# ]
# #EyeTracker._eventArrayLengths['FIXATION_END']=len(fee)
# self._addNativeEventToBuffer(fee)
# elif isinstance(ne,pylink.StartFixationEvent):
# etype=EventConstants.FIXATION_START
#
# which_eye=ne.getEye()
# if which_eye:
# which_eye=EyeTrackerConstants.RIGHT_EYE
# else:
# which_eye=EyeTrackerConstants.LEFT_EYE
#
#
# se=[
# 0, # exp ID
# 0, # sess ID
# Computer._getNextEventID(), # event ID
# etype, # event type
# ne.event_timestamp,
# ne.logged_time,
# ne.timestamp,
# confidenceInterval,
# ne.event_delay,
# 0,
# which_eye, # eye
# gaze[0], # gaze x
# gaze[1], # gaze y
# EyeTrackerConstants.UNDEFINED, # gaze z
# href[0], # angle x
# href[1], # angle y
# EyeTrackerConstants.UNDEFINED, # raw x
# EyeTrackerConstants.UNDEFINED, # raw y
# pupil_size, # pupil area
# EyeTrackerConstants.PUPIL_AREA, # pupil measure type 1
# EyeTrackerConstants.UNDEFINED, # pupil measure 2
# EyeTrackerConstants.UNDEFINED, # pupil measure 2 type
# ppd[0], # ppd x
# ppd[1], # ppd y
# EyeTrackerConstants.UNDEFINED, # velocity x
# EyeTrackerConstants.UNDEFINED, # velocity y
# velocity, # velocity xy
# estatus # status
# ]
# self._addNativeEventToBuffer(se)
except Exception:
print2err("ERROR occurred during poll:")
printExceptionDetailsToStdErr()
# start recording
eyegaze_control.bTrackingActive = True
# For the example, collect 1000+ samples of data
samples_rx = 0
rec_start = timeit.default_timer()
MAX_SAMPLES = 100
while samples_rx < MAX_SAMPLES:
# This is the 'doing something else' part in the example.
time.sleep(0.005)
# we'll use async. mode, getting avail samples
# and then 'do something else'.
while eyegaze_control.iNPointsAvailable:
pEyeGaze.EgGetData(byref(eyegaze_control))
# assume monocular for this example only. ;)
sample_data0 = eyegaze_control.pstEgData[0]
stime = sample_data0.dGazeTimeSec
current_time = (pEyeGaze.lct_TimerRead(None) / 1000000.0
) - pEyeGaze.EgGetApplicationStartTimeSec()
delay = current_time - stime
gaze_x = sample_data0.iIGaze
gaze_y = sample_data0.iJGaze
print 'Sample Time: {0}\t{1}\t{2}\tX: {3}\tY: {4}\ti: {5}'.format(
stime, current_time, delay, gaze_x, gaze_y, samples_rx)
samples_rx += 1
if samples_rx > MAX_SAMPLES:
break
rec_end = timeit.default_timer()
