Fix KeyError exception when trying to add points to a team that is not in the...

Fix KeyError exception when trying to add points to a team that is not in the list. Update webcam before trying to read it in the team chooser window.

game/detector.py

@@ -18,6 +18,10 @@ class Detector(apriltag.Detector):
     def detect_from_cam(self):
         cv2.namedWindow("Detection")
 
+        # Refresh cam before trying to detect tags, else it reads an old image
+        for i in range(5):
+            self.cam.read()
+
         tag_id = None
         while not tag_id:
             ret, frame = self.cam.read()
@@ -35,6 +39,7 @@ class Detector(apriltag.Detector):
 
             gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
             tag_id = self.detect(gray)
+            print(tag_id)
 
         cv2.destroyAllWindows()
         return tag_id

game/scoreboard.py

@@ -128,15 +128,18 @@ class ScoreWindow(ScoreWindowUi):
 
     def add_points(self, tag_id):
         """ Add points to the team with the corresponding tag id """
-        team = self.teams[tag_id]
-        remaining_time = - self.time_edit.time().secsTo(qtc.QTime(0, 0, 0, 0))
-        if remaining_time > 0:  # Teams can't win any points after the timer has ended
-            max_points = 1000
-            min_points = 100
-            points_added = int(min_points + (max_points - min_points) / self.initial_time * remaining_time)
-            if team.can_win_points:
-                team.add_points(points_added)
-                self.show_event(team, points_added)
+        try:
+            team = self.teams[tag_id]
+            remaining_time = - self.time_edit.time().secsTo(qtc.QTime(0, 0, 0, 0))
+            if remaining_time > 0:  # Teams can't win any points after the timer has ended
+                max_points = 1000
+                min_points = 100
+                points_added = int(min_points + (max_points - min_points) / self.initial_time * remaining_time)
+                if team.can_win_points:
+                    team.add_points(points_added)
+                    self.show_event(team, points_added)
+        except KeyError:  # If the webcam detects a tag that is not registered in the list
+            pass
 
     def show_event(self, team, points_added):
         message = team.name + " a gagné " + str(points_added) + " points."