Spawn failed because of collision at spawn position

[DarkerSun6]

[DarkerSun6]

CARLA version:carla0.9.14 Platform/OS:ubuntu20.04 Problem you have experienced: I encountered the following error when placing pedestrians on randomly generated points Spawn failed because of collision at spawn position I used the following method to obtain randomly generated points walker_position = [] for j in range(4): spawn_1 = world.get_random_location_from_navigation() spawn_location = {attr:getattr(spawn_1,attr) for attr in ["x","y","z"]} if spawn_location not in walker_position: walker_position.append(spawn_location) I have drawn the error point in this diagram, and it can be seen that there is no collision at that location, as shown in point 2

What you expected to happen: I would greatly appreciate it if I could receive your answer

[PatrickPromitzer]

Hi, my guess is, that the spawn point is too close to the wall or the floor. The same problem happens if you spawn 2 pedestrians too close together. After spawning, you don't have the problem with using way-points (navigation), because it would be enough to be close to the way-point and don't need to be exactly on the location value.

get_random_location_from_navigation(self)
This can only be used with walkers. It retrieves a random location to be used as a destination using 
the go_to_location() method in carla.WalkerAIController. This location will be part of a sidewalk. 
Roads, crosswalks and grass zones are excluded. The method does not take into consideration 
locations of existing actors so if a collision happens when trying to spawn an actor, 
it will return an error. Take a look at generate_traffic.py for an example.

It looks like the example script doesn't take into account that some navigation points can't be used as a spawn point.