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authorThéo de la Hogue2022-04-20 14:41:12 +0200
committerThéo de la Hogue2022-04-20 14:41:12 +0200
commita4a0ef9e28a009ad073958891382b3215c8d96f6 (patch)
tree780c9238dbaa975b30257aa332ae8149ebc493b3 /src
parent824c00abfa923b58d82e23615ce7c18db3ca152f (diff)
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Adding AOIFeatures file to genaralize some AOI classes definition. Working on new visual scan class.
Diffstat (limited to 'src')
-rw-r--r--src/argaze/AreaOfInterest/AOI2DScene.py52
-rw-r--r--src/argaze/AreaOfInterest/AOI3DScene.py43
-rw-r--r--src/argaze/AreaOfInterest/AOIFeatures.py50
-rw-r--r--src/argaze/AreaOfInterest/__init__.py2
-rw-r--r--src/argaze/GazeFeatures.py75
-rw-r--r--src/argaze/utils/export_tobii_segment_aruco_aois.py36
-rw-r--r--src/argaze/utils/export_tobii_segment_fixations.py8
-rw-r--r--src/argaze/utils/live_tobii_aruco_aois.py17
8 files changed, 192 insertions, 91 deletions
diff --git a/src/argaze/AreaOfInterest/AOI2DScene.py b/src/argaze/AreaOfInterest/AOI2DScene.py
index fc4b3b2..929cc30 100644
--- a/src/argaze/AreaOfInterest/AOI2DScene.py
+++ b/src/argaze/AreaOfInterest/AOI2DScene.py
@@ -1,44 +1,42 @@
#!/usr/bin/env python
from argaze import DataStructures
+from argaze.AreaOfInterest import AOIFeatures
+from argaze import GazeFeatures
import cv2 as cv
import matplotlib.path as mpath
-class AOI2D(DataStructures.DictObject):
- """Define Area Of Interest 2D
- ```
+class AOI2DScene(AOIFeatures.AOIScene):
+ """Define AOI 2D scene as:
+ ```
{
- 'vertices': array of (x, y) tuples,
- 'pointer': (x, y) tuple or None
+ 'dimension': 2,
+ 'name 1': AOI 1,
+ 'name 2': AOI 2,
+ ...
}
- ```
+ ```
"""
- def __init__(self, vertices, pointer = None):
-
- super().__init__(type(self).__name__, **{'vertices': vertices, 'pointer': pointer})
-
-class AOI2DScene(DataStructures.DictObject):
- """Define AOI 2D scene as dictionnary of named AOI2Ds."""
-
def __init__(self, **aois_2d):
- super().__init__(type(self).__name__, **aois_2d)
+ super().__init__(**aois_2d)
- def __del__(self):
- pass
+ # set dimension member
+ self.dimension = 2
- def inside(self, pointer):
- """Store pointer position if it is inside AOIs."""
+ def look_at(self, gaze_position: GazeFeatures.GazePosition):
+ """Store gaze position as a pointer inside looked AOIs."""
- for name in self.keys():
+ for name in self.areas():
aoi2D = self[name]
- if mpath.Path(aoi2D.vertices).contains_points([pointer])[0]:
+ if mpath.Path(aoi2D.vertices).contains_points([(gaze_position.x, gaze_position.y)])[0]:
- aoi2D.pointer = pointer
+ # TODO : edit area relative pointer position
+ aoi2D.pointer = (gaze_position.x, gaze_position.y)
else:
@@ -47,7 +45,7 @@ class AOI2DScene(DataStructures.DictObject):
def draw(self, frame):
"""Draw AOI polygons on frame."""
- for name in self.keys():
+ for name in self.areas():
aoi2D = self[name]
inside = aoi2D.pointer != None
@@ -60,13 +58,3 @@ class AOI2DScene(DataStructures.DictObject):
cv.line(frame, aoi2D.vertices[-1], aoi2D.vertices[0], color, 1)
for A, B in zip(aoi2D.vertices, aoi2D.vertices[1:]):
cv.line(frame, A, B, color, 1)
-
-class TimeStampedAOI2DScenes(DataStructures.TimeStampedBuffer):
- """Define timestamped buffer to store AOI2D scenes"""
-
- def __setitem__(self, key, value: AOI2DScene):
- """Force value to be a AOI2DScene"""
- if type(value) != AOI2DScene:
- raise ValueError('value must be a AOI2DScene')
-
- super().__setitem__(key, value)
diff --git a/src/argaze/AreaOfInterest/AOI3DScene.py b/src/argaze/AreaOfInterest/AOI3DScene.py
index 73fc755..2930983 100644
--- a/src/argaze/AreaOfInterest/AOI3DScene.py
+++ b/src/argaze/AreaOfInterest/AOI3DScene.py
@@ -4,32 +4,20 @@ import math
import re
from argaze import DataStructures
-from argaze.AreaOfInterest import AOI2DScene
+from argaze.AreaOfInterest import AOIFeatures, AOI2DScene
import numpy
import cv2 as cv
-class AOI3D(DataStructures.DictObject):
- """Define Area Of Interest 3D
- ```
- {
- 'vertices': array of (x, y, z) tuples
- }
- ```
- """
-
- def __init__(self, vertices):
-
- super().__init__(type(self).__name__, **{'vertices': vertices})
-
-class AOI3DScene(DataStructures.DictObject):
- """Define AOI 3D scene as dictionnary of named AOI3Ds.
+class AOI3DScene(AOIFeatures.AOIScene):
+ """Define AOI 3D scene as:
```
{
+ 'dimension': 3,
'rotation': (x, y, z) tuples,
'translation': (x, y, z) tuples,
- 'AOI name 1': AOI3D,
- 'AOI name 2': AOI3D,
+ 'name 1': AOI 1,
+ 'name 2': AOI 2,
...
}
```
@@ -41,10 +29,14 @@ class AOI3DScene(DataStructures.DictObject):
aois_3d['rotation'] = numpy.asarray([0., 0., 0.])
aois_3d['translation'] = numpy.asarray([0., 0., 0.])
- super().__init__(type(self).__name__, **aois_3d)
+ super().__init__(**aois_3d)
- def __del__(self):
- pass
+ # set dimension member
+ self.dimension = 3
+
+ def areas(self):
+ """Get areas names"""
+ return self.keys()[3::]
def load(self, obj_filepath: str):
"""Load AOI3D scene from .obj file."""
@@ -111,7 +103,7 @@ class AOI3DScene(DataStructures.DictObject):
# retreive all aoi3D vertices
for name, face in faces.items():
- self.append(name, AOI3D(**{'vertices': [ vertices[i-1] for i in face ]}))
+ self.append(name, AOIFeatures.AreaOfInterest(**{'vertices': [ vertices[i-1] for i in face ]}))
except IOError:
raise IOError(f'File not found: {obj_filepath}')
@@ -122,10 +114,7 @@ class AOI3DScene(DataStructures.DictObject):
aoi2D_scene = {}
- for name in self.keys():
-
- if name == 'rotation' or name == 'translation':
- continue
+ for name in self.areas():
aoi3D = self[name]
@@ -134,7 +123,7 @@ class AOI3DScene(DataStructures.DictObject):
vertices_2D, J = cv.projectPoints(vertices_3D, self.rotation, self.translation, K, D)
vertices_2D = vertices_2D.astype('int').reshape((len(vertices_2D), 2)).tolist()
- aoi2D = AOI2DScene.AOI2D(vertices_2D)
+ aoi2D = AOIFeatures.AreaOfInterest(vertices_2D)
aoi2D_scene[name] = aoi2D
diff --git a/src/argaze/AreaOfInterest/AOIFeatures.py b/src/argaze/AreaOfInterest/AOIFeatures.py
new file mode 100644
index 0000000..4788100
--- /dev/null
+++ b/src/argaze/AreaOfInterest/AOIFeatures.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+from argaze import DataStructures
+
+class AreaOfInterest(DataStructures.DictObject):
+ """Define 2D/3D Area Of Interest
+ ```
+ {
+ 'vertices': array of (x, y(,z)) tuples for each vertices of the area
+ 'pointer': None or (x, y(,z)) tuple to set where the area is looked
+ }
+ ```
+ """
+
+ def __init__(self, vertices, pointer = None):
+
+ super().__init__(type(self).__name__, **{'dimension': len(vertices[0]),'vertices': vertices, 'pointer': pointer})
+
+class AOIScene(DataStructures.DictObject):
+ """Define AOI scene as:
+ ```
+ {
+ 'dimension': 2 or 3,
+ 'name 1': AOI 1,
+ 'name 2': AOI 2,
+ ...
+ }
+ ```
+ """
+
+ def __init__(self, **aois):
+
+ # append dimension member
+ aois['dimension'] = None
+
+ super().__init__(type(self).__name__, **aois)
+
+ def areas(self):
+ """Get areas names."""
+ return self.keys()[:-1]
+
+class TimeStampedAOIScenes(DataStructures.TimeStampedBuffer):
+ """Define timestamped buffer to store AOI scenes in time."""
+
+ def __setitem__(self, key, value):
+ """Force value to inherit from AOIScene."""
+ if type(value).__bases__[0] != AOIScene:
+ raise ValueError(f'value must inherit from AOIScene')
+
+ super().__setitem__(key, value)
diff --git a/src/argaze/AreaOfInterest/__init__.py b/src/argaze/AreaOfInterest/__init__.py
index 57ce80a..a1e9f47 100644
--- a/src/argaze/AreaOfInterest/__init__.py
+++ b/src/argaze/AreaOfInterest/__init__.py
@@ -2,4 +2,4 @@
.. include:: README.md
"""
__docformat__ = "restructuredtext"
-__all__ = ['AOI2DScene', 'AOI3DScene'] \ No newline at end of file
+__all__ = ['AOIFeatures', 'AOI2DScene', 'AOI3DScene'] \ No newline at end of file
diff --git a/src/argaze/GazeFeatures.py b/src/argaze/GazeFeatures.py
index 2f1d167..13bd9f5 100644
--- a/src/argaze/GazeFeatures.py
+++ b/src/argaze/GazeFeatures.py
@@ -3,20 +3,25 @@
import math
from argaze import DataStructures
+from argaze.AreaOfInterest import AOIFeatures
import numpy
FIXATION_MAX_DURATION = 1000
class GazePosition(DataStructures.DictObject):
- """Define gaze position"""
+ """Define gaze position."""
def __init__(self, x, y):
super().__init__(type(self).__name__, **{'x': x, 'y': y})
+ def __iter__(self):
+ yield self.x
+ yield self.y
+
class TimeStampedGazePositions(DataStructures.TimeStampedBuffer):
- """Define timestamped buffer to store gaze positions"""
+ """Define timestamped buffer to store gaze positions."""
def __setitem__(self, key, value: GazePosition):
"""Force value to be a GazePosition"""
@@ -33,7 +38,7 @@ class Fixation(DataStructures.DictObject):
super().__init__(type(self).__name__, **{'duration': duration, 'dispersion': dispersion, 'centroid': [cx, cy]})
class TimeStampedFixations(DataStructures.TimeStampedBuffer):
- """Define timestamped buffer to store fixations"""
+ """Define timestamped buffer to store fixations."""
def __setitem__(self, key, value: Fixation):
"""Force value to be a Fixation"""
@@ -43,7 +48,7 @@ class TimeStampedFixations(DataStructures.TimeStampedBuffer):
super().__setitem__(key, value)
class FixationIdentifier():
- """Abstract class to define what should provide a fixation identifier"""
+ """Abstract class to define what should provide a fixation identifier."""
def __init__(self, ts_gaze_positions: TimeStampedGazePositions):
@@ -187,3 +192,65 @@ class DispersionBasedFixationIdentifier(FixationIdentifier):
raise StopIteration
return -1, None
+
+class VisualScan():
+ """Abstract class to define when an aoi starts to be looked and when it stops."""
+
+ def __init__(self, ts_aoi_scenes: AOIFeatures.TimeStampedAOIScenes):
+
+ if type(ts_aoi_scenes) != AOIFeatures.TimeStampedAOIScenes:
+ raise ValueError('argument must be a TimeStampedAOIScenes')
+
+ def __iter__(self):
+ raise NotImplementedError('__iter__() method not implemented')
+
+ def __next__(self):
+ raise NotImplementedError('__next__() method not implemented')
+
+class PointerBasedVisualScan(VisualScan):
+ """Build visual scan on the basis of AOI's pointer information."""
+
+ def __init__(self, ts_aoi_scenes: AOIFeatures.TimeStampedAOIScenes, tolerance_to_lacking: int):
+
+ super().__init__(ts_aoi_scenes)
+
+ # process identification on a copy
+ self.__ts_aoi_scenes = ts_aoi_scenes.copy()
+
+ def __iter__(self):
+ """Start to build visual scan."""
+ return self
+
+ def __next__(self):
+
+ # while there is aoi scene to process
+ if len(self.__ts_aoi_scenes) > 0:
+
+ #if not ts_aoi.looked:
+ # raise ValueError('TimeStampedAOIScenes must be looked using look_at method.')
+
+ return # start timestamp, AOI name, duration
+
+class FixationBasedVisualScan(VisualScan):
+ """Build visual scan on the basis of timestamped fixations."""
+
+ def __init__(self, ts_aoi_scenes: AOIFeatures.TimeStampedAOIScenes, ts_fixations: TimeStampedFixations):
+
+ super().__init__(ts_aoi_scenes)
+
+ if type(ts_fixations) != TimeStampedFixations:
+ raise ValueError('second argument must be a GazeFeatures.TimeStampedFixations')
+
+ # process identification on a copy
+ self.__ts_aoi_scenes = ts_aoi_scenes.copy()
+ self.__ts_fixations = ts_fixations.copy()
+
+ def __iter__(self):
+ """Start to build visual scan."""
+ return self
+
+ def __next__(self):
+
+ # while there is aoi scene to process
+ if len(self.__ts_aoi_scenes) > 0:
+ return \ No newline at end of file
diff --git a/src/argaze/utils/export_tobii_segment_aruco_aois.py b/src/argaze/utils/export_tobii_segment_aruco_aois.py
index 8f8412d..8e8c3fd 100644
--- a/src/argaze/utils/export_tobii_segment_aruco_aois.py
+++ b/src/argaze/utils/export_tobii_segment_aruco_aois.py
@@ -29,7 +29,7 @@ def main():
parser.add_argument('-r', '--time_range', metavar=('START_TIME', 'END_TIME'), nargs=2, type=float, default=(0., None), help='start and end time (in second)')
parser.add_argument('-c', '--camera_calibration', metavar='CAM_CALIB', type=str, default='tobii_camera.json', help='json camera calibration filepath')
parser.add_argument('-a', '--aoi_scene', metavar='AOI_SCENE', type=str, default='aoi3D_scene.obj', help='obj aoi scene filepath')
- parser.add_argument('-d', '--dictionary', metavar='DICT', type=str, default='DICT_ARUCO_ORIGINAL', help='aruco marker dictionnary')
+ parser.add_argument('-d', '--dictionary', metavar='DICT', type=str, default='DICT_ARUCO_ORIGINAL', help='aruco marker dictionnary (DICT_4X4_50, DICT_4X4_100, DICT_4X4_250, DICT_4X4_1000, DICT_5X5_50, DICT_5X5_100, DICT_5X5_250, DICT_5X5_1000, DICT_6X6_50, DICT_6X6_100, DICT_6X6_250, DICT_6X6_1000, DICT_7X7_50, DICT_7X7_100, DICT_7X7_250, DICT_7X7_1000, DICT_ARUCO_ORIGINAL,DICT_APRILTAG_16h5, DICT_APRILTAG_25h9, DICT_APRILTAG_36h10, DICT_APRILTAG_36h11)')
parser.add_argument('-m', '--marker_size', metavar='MARKER_SIZE', type=float, default=6, help='aruco marker size (cm)')
parser.add_argument('-i', '--markers_id', metavar='MARKERS_ID', nargs='*', type=int, default=[], help='markers id to track')
parser.add_argument('-o', '--output', metavar='OUT', type=str, default=None, help='destination folder path (segment folder by default)')
@@ -87,10 +87,13 @@ def main():
# Create AOIs 3D scene
aoi3D_scene = AOI3DScene.AOI3DScene()
aoi3D_scene.load(args.aoi_scene)
- print(f'AOIs names: {aoi3D_scene.keys()[2::]}')
+ print(f'AOIs names: {aoi3D_scene.areas()}')
- # Create Timestamped buffer to store 2D AOIs
- aoi2D_timestamped_buffer = AOI2DScene.TimeStampedAOI2DScenes()
+ # Create timestamped buffer to store AOIs scene in time
+ ts_aois_scenes = AOIFeatures.TimeStampedAOIScenes()
+
+ # Create timestamped buffer to store gaze positions in time
+ ts_gaze_positions = GazeFeatures.TimeStampedGazePositions()
# Video and data replay loop
try:
@@ -106,14 +109,17 @@ def main():
# Get closest gaze position before video timestamp and remove all gaze positions before
closest_gaze_ts, closest_gaze_position = tobii_ts_gaze_positions.pop_first_until(video_ts)
- # Draw video synchronized gaze pointer
- pointer = (int(closest_gaze_position.gp[0] * video_frame.width), int(closest_gaze_position.gp[1] * video_frame.height))
- cv.circle(video_frame.matrix, pointer, 4, (0, 255, 255), -1)
+ # Draw video synchronized gaze position
+ gaze_position = GazeFeatures.GazePosition(int(closest_gaze_position.gp[0] * video_frame.width), int(closest_gaze_position.gp[1] * video_frame.height))
+ cv.circle(video_frame.matrix, tuple(gaze_position), 4, (0, 255, 255), -1)
+
+ # Store gaze position at this time
+ ts_gaze_positions[video_ts] = gaze_position
# When expected values can't be found
except (KeyError, AttributeError, ValueError):
- pass # keep last pointer position
+ pass # keep last gaze position
# Track markers with pose estimation and draw them
aruco_tracker.track(video_frame.matrix)
@@ -141,15 +147,15 @@ def main():
# This hack isn't realistic but as the gaze will mainly focus on centered AOI, where the distorsion is low, it is acceptable.
aoi2D_scene = aoi3D_scene.project(aruco_camera.get_K(), D0)
- # Check if gaze is inside 2D aois
- if pointer != None:
- aoi2D_scene.inside(pointer)
+ # Check which 2D aois is looked
+ if gaze_position != None:
+ aoi2D_scene.look_at(gaze_position)
# Draw 2D aois
aoi2D_scene.draw(video_frame.matrix)
- # Store 2D aois
- aoi2D_timestamped_buffer[video_ts] = aoi2D_scene
+ # Store 2D aois scene at this time
+ ts_aois_scenes[video_ts] = aoi2D_scene
# Close window using 'Esc' key
if cv.waitKey(1) == 27:
@@ -162,7 +168,7 @@ def main():
output_video.write(video_frame.matrix)
# Update Progress Bar
- progress = video_ts - tobii_segment_video.get_vts_offset() - int(args.time_range[0] * 1000000)
+ progress = video_ts - int(args.time_range[0] * 1000000) # - tobii_segment_video.get_vts_offset() ?
MiscFeatures.printProgressBar(progress, tobii_segment_video.get_duration(), prefix = 'Progress:', suffix = 'Complete', length = 100)
# Exit on 'ctrl+C' interruption
@@ -178,7 +184,7 @@ def main():
print(f'\nAOIs video saved into {video_filepath}')
# Export 2D aois
- aoi2D_timestamped_buffer.export_as_json(aois_filepath)
+ ts_aois_scenes.export_as_json(aois_filepath)
print(f'Timestamped AOIs positions saved into {aois_filepath}')
diff --git a/src/argaze/utils/export_tobii_segment_fixations.py b/src/argaze/utils/export_tobii_segment_fixations.py
index 91a44e9..f232495 100644
--- a/src/argaze/utils/export_tobii_segment_fixations.py
+++ b/src/argaze/utils/export_tobii_segment_fixations.py
@@ -67,7 +67,7 @@ def main():
fixation_analyser = GazeFeatures.DispersionBasedFixationIdentifier(generic_ts_gaze_positions, args.dispersion_threshold, args.duration_threshold)
# Start fixation identification
- fixations = GazeFeatures.TimeStampedFixations()
+ ts_fixations = GazeFeatures.TimeStampedFixations()
MiscFeatures.printProgressBar(0, int(tobii_segment_video.get_duration()/1000), prefix = 'Progress:', suffix = 'Complete', length = 100)
@@ -78,14 +78,14 @@ def main():
if item.get_type() == 'Fixation':
- fixations[ts] = item
+ ts_fixations[ts] = item
MiscFeatures.printProgressBar(ts-int(args.time_range[0]*1000), int(tobii_segment_video.get_duration()/1000), prefix = 'Progress:', suffix = 'Complete', length = 100)
- print(f'\n{len(fixations)} fixations found')
+ print(f'\n{len(ts_fixations)} fixations found')
# Export fixations analysis results
- fixations.export_as_json(fixations_filepath)
+ ts_fixations.export_as_json(fixations_filepath)
print(f'Fixations saved into {fixations_filepath}')
diff --git a/src/argaze/utils/live_tobii_aruco_aois.py b/src/argaze/utils/live_tobii_aruco_aois.py
index e718cee..1bc79eb 100644
--- a/src/argaze/utils/live_tobii_aruco_aois.py
+++ b/src/argaze/utils/live_tobii_aruco_aois.py
@@ -24,7 +24,7 @@ def main():
parser.add_argument('-t', '--tobii_ip', metavar='TOBII_IP', type=str, default='192.168.1.10', help='tobii glasses ip')
parser.add_argument('-c', '--camera_calibration', metavar='CAM_CALIB', type=str, default='tobii_camera.json', help='json camera calibration filepath')
parser.add_argument('-a', '--aoi_scene', metavar='AOI_SCENE', type=str, default='aoi3D_scene.obj', help='obj aoi scene filepath')
- parser.add_argument('-d', '--dictionary', metavar='DICT', type=str, default='DICT_ARUCO_ORIGINAL', help='aruco marker dictionnary')
+ parser.add_argument('-d', '--dictionary', metavar='DICT', type=str, default='DICT_ARUCO_ORIGINAL', help='aruco marker dictionnary (DICT_4X4_50, DICT_4X4_100, DICT_4X4_250, DICT_4X4_1000, DICT_5X5_50, DICT_5X5_100, DICT_5X5_250, DICT_5X5_1000, DICT_6X6_50, DICT_6X6_100, DICT_6X6_250, DICT_6X6_1000, DICT_7X7_50, DICT_7X7_100, DICT_7X7_250, DICT_7X7_1000, DICT_ARUCO_ORIGINAL,DICT_APRILTAG_16h5, DICT_APRILTAG_25h9, DICT_APRILTAG_36h10, DICT_APRILTAG_36h11)')
parser.add_argument('-m', '--marker_size', metavar='MKR', type=float, default=6, help='aruco marker size (cm)')
parser.add_argument('-i', '--markers_id', metavar='MARKERS_ID', nargs='*', type=int, default=[], help='markers id to track')
args = parser.parse_args()
@@ -57,6 +57,7 @@ def main():
# Create AOIs 3D scene
aoi3D_scene = AOI3DScene.AOI3DScene()
aoi3D_scene.load(args.aoi_scene)
+ print(f'AOIs names: {aoi3D_scene.areas()}')
# Start streaming
tobii_controller.start_streaming()
@@ -81,14 +82,14 @@ def main():
# Get last gaze position before video timestamp and remove all former gaze positions
earliest_ts, earliest_gaze_position = past_gaze_positions.pop_first_until(video_ts)
- # Draw video synchronized gaze pointer
- pointer = (int(earliest_gaze_position.gp[0] * video_frame.width), int(earliest_gaze_position.gp[1] * video_frame.height))
- cv.circle(video_frame.matrix, pointer, 4, (0, 255, 255), -1)
+ # Draw video synchronized gaze position
+ gaze_position = GazeFeatures.GazePosition((int(earliest_gaze_position.gp[0] * video_frame.width), int(earliest_gaze_position.gp[1] * video_frame.height)))
+ cv.circle(video_frame.matrix, gaze_position, 4, (0, 255, 255), -1)
# When expected values aren't in data stream
except (KeyError, AttributeError, ValueError):
- pass # keep last pointer position
+ pass # keep last gaze position
# Track markers with pose estimation and draw them
aruco_tracker.track(video_frame.matrix)
@@ -116,9 +117,9 @@ def main():
# This hack isn't realistic but as the gaze will mainly focus on centered AOI, where the distorsion is low, it is acceptable.
aoi2D_scene = aoi3D_scene.project(aruco_camera.get_K(), D0)
- # Check if gaze is inside 2D aois
- if pointer != None:
- aoi2D_scene.inside(pointer)
+ # Check which 2D aois is looked
+ if gaze_position != None:
+ aoi2D_scene.look_at(gaze_position)
# Draw 2D aois
aoi2D_scene.draw(video_frame.matrix)