| 717 | |
| 718 | |
| 719 | class LaneInvasionSensor(object): |
| 720 | def __init__(self, parent_actor, hud): |
| 721 | self.sensor = None |
| 722 | self._parent = parent_actor |
| 723 | self.hud = hud |
| 724 | world = self._parent.get_world() |
| 725 | bp = world.get_blueprint_library().find('sensor.other.lane_invasion') |
| 726 | self.sensor = world.spawn_actor(bp, carla.Transform(), attach_to=self._parent) |
| 727 | # We need to pass the lambda a weak reference to self to avoid circular |
| 728 | # reference. |
| 729 | weak_self = weakref.ref(self) |
| 730 | self.sensor.listen(lambda event: LaneInvasionSensor._on_invasion(weak_self, event)) |
| 731 | |
| 732 | @staticmethod |
| 733 | def _on_invasion(weak_self, event): |
| 734 | self = weak_self() |
| 735 | if not self: |
| 736 | return |
| 737 | lane_types = set(x.type for x in event.crossed_lane_markings) |
| 738 | text = ['%r' % str(x).split()[-1] for x in lane_types] |
| 739 | self.hud.notification('Crossed line %s' % ' and '.join(text)) |
| 740 | |
| 741 | |
| 742 | # ============================================================================== |