question

EK avatar image
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EK asked Felix Möhlmann answered

Missing grid nodes on A* barrier overlap

Missing grid node on Astar barrier overlap.fsm1697182302408.png


I am trying to follow the kiva tutorial on setting up travel direction using A* barriers for loaded TE (https://www.youtube.com/watch?v=3AQ-cjOS9tY). My TE gets stuck on the overlapping barrier node which seems to be missing. I have checked that the barriers are on the same level (z=0)

FlexSim 23.2.1
astar barrier
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1 Answer

Felix Möhlmann avatar image
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Felix Möhlmann answered

Your barriers only allow travel in a single direction. At the crossover points both restrictions apply, leaving no possible travel direction.

In the video you linked, the barriers allow travel in three directions (see around 31:30); the main direction and perpendicular to it. The perpendicular directions are not used because they are either blocked by the storage itself or because they would result in a longer path.

At the crossings, this still leaves two possible travel directions.

1697183414565.png


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