Can somebody help me that people don´t change the preferred path? In my model people suddenly change the left path to the right! What can I do that 2 people are able walking side by side the floor and the stairway?
Preferred paths don't make people stay on them across their length. They just adjust the cost of moving between grid points such that it seems like a shorter path to move between grid points along the path. However, as soon as the cost of staying on the path is higher than following a new route of the path, the traveler will leave the path.
Here's a version of your model where I used dividers to split the stairs into two paths and then I put one preferred path on the longer path and adjusted its weight value until that path looked shorter for people coming from the right.
Also, I strongly recommend you turn on the Snap Dividers to Grid option so that you can actually tell where the divider placement is doing something different.
Thanks a lot @Matthew Gillespie for the solution! I played a lot with dividers and path, but I had not managed the problem. A good hint is to use Snap Dividers to Grid when using AStar! Thanks .
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