Stuck passengers in a corner

[mip2025]

Hello,
We have a general question: While running simulations, have you encountered an issue where passengers get stuck in a corner, appearing to "talk" rather than moving toward their intended destination? We've implemented social force models and various logic, but some passengers still refuse to move in the correct direction. Instead, they remain stationary in a corner. Could this be a general bug in the JuPedSim package? Would you happen to have ideas on how to fix this issue?
We greatly appreciate your support and feedback!

[chraibi]

This is basically related to discussion #1434, right?

If you use jupedsim-visualizer, you will notice that there is an issue with your geometry.

You can see when I click on an agent, the visualizer shows me the route, it's supposed to take.
(in the video, you see that it finds some weird routes).
This usually happen when the geometry has some little holes and is not properly defined.

The southern walls (southern_walls) and the rest_of_train hole might overlap or not align perfectly with the outer polygon, causing ambiguity in routing.

Small overlaps or gaps can create unintended barriers or open spaces.

You definitely should debug your geometry. Then there will be no "chat" among agents ^^.

Screen.Recording.2025-01-12.at.20.43.24.mov

[chraibi]

I think a correct geometry should look like this

x_min, y_min = 0, -2
x_max, y_max = 18, 6
wall_height = 2
thickness = 0.1

door_size = 2
door1_center = 4
door2_center = 14

def create_train():
    main_area = box(x_min, y_min, x_max, y_max)
    
    door1 = box(door1_center - door_size/2, wall_height, 
                door1_center + door_size/2, wall_height + thickness)
    
    door2 = box(door2_center - door_size/2, wall_height,
                door2_center + door_size/2, wall_height + thickness)
    
    # Create horizontal barrier (the entire wall section)
    barrier = box(x_min, wall_height, x_max, wall_height + thickness)
    
    # First remove the barrier from main area
    temp = main_area.difference(barrier)
    
    # Then add back the door openings
    geometry = unary_union([temp, door1, door2])
    
    return geometry

[mip2025]

Thank you very much for your support, the code runs perfectly now