| 422 | |
| 423 | |
| 424 | class LaneInvasionSensor(object): |
| 425 | def __init__(self, parent_actor, hud): |
| 426 | self.sensor = None |
| 427 | self._parent = parent_actor |
| 428 | self.hud = hud |
| 429 | world = self._parent.get_world() |
| 430 | bp = world.get_blueprint_library().find('sensor.other.lane_invasion') |
| 431 | self.sensor = world.spawn_actor(bp, carla.Transform(), attach_to=self._parent) |
| 432 | # We need to pass the lambda a weak reference to self to avoid circular |
| 433 | # reference. |
| 434 | weak_self = weakref.ref(self) |
| 435 | self.sensor.listen(lambda event: LaneInvasionSensor._on_invasion(weak_self, event)) |
| 436 | |
| 437 | @staticmethod |
| 438 | def _on_invasion(weak_self, event): |
| 439 | self = weak_self() |
| 440 | if not self: |
| 441 | return |
| 442 | lane_types = set(x.type for x in event.crossed_lane_markings) |
| 443 | text = ['%r' % str(x).split()[-1] for x in lane_types] |
| 444 | self.hud.notification('Crossed line %s' % ' and '.join(text)) |
| 445 | |
| 446 | # ============================================================================== |
| 447 | # -- GnssSensor -------------------------------------------------------- |