How to customize Barrier in A* network to allow or restrict people to cross?

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Ankith T asked Jun 24, '22 Jason Lightfoot commented Jul 1, '22

How to customize Barrier in A* network to allow or restrict people to cross?

In my project i want people in A* network to stop at barrier or flow through barrier according to the label assigned to a control point marked in blue circle.

the label of the control point fluctuate between "green" and "red" for every 15 seconds.

at first "people red assign label" function the label of control point is "red". at this point if any people approach the barrier, it should not allow people to cross it.

after 15 seconds the label of that control point changes to green. at this point barrier should allow people to cross through barrier.

is there a way that we can make this kind of modifications to barrier according to the label of a control point.

Software Version:

FlexSim 21.1.5

a star navigation people flow control point barriers

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1656101173047.png (13.8 KiB)

1656101310825.png (15.0 KiB)

1656101435952.png (15.0 KiB)

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Jason Lightfoot ♦ commented · Jul 01, 2022 at 08:57 PM

Hi @Ankith T, was our answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

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Answer 1 · 2022-06-25T13:57:53Z

Jason Lightfoot answered Jun 25, '22 Jason Lightfoot edited Jun 28, '22

You can set a condition for the barrier to be active which can read the state of your crossing. In the attached model I show the barrier is deactivated between 100 and 200 seconds.

TimedBarrier.fsm

The problem here is that the evaluation is at the start of travel and it's not reevaluated during travel. To make that happen you could use an agent proximity to the barrier or maintain a list of travelers. To force the reevaluation of travel you can just preempt the travellers with a zero time delay task.

You may then run into another problem in that the travellers complain they cannot reach a destination or they start walking in a different direction if an alternative path is available. In those cases you might be better preempting them with a Utilize task and then free them once they can cross.

timedbarrier.fsm (87.6 KiB)

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Ankith T commented · Jun 27, 2022 at 01:01 PM

your model is in 22.1 flexsim version, i have the lower version, can you post pictures and explain how did you approach this problem

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Jason Lightfoot ♦ Ankith T commented · Jun 27, 2022 at 01:24 PM

Here's the model in 21.0 - unfortunately it needs 21.2 or later to run it seems.

TimedBarrier_21.0.fsm

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timedbarrier-210.fsm (95.5 KiB)

Ankith T Jason Lightfoot ♦ commented · Jun 27, 2022 at 01:35 PM

is there any other way that we can stop travelers for some time and release them after certain time. like first 15 seconds people can cross the barrier and next 15 seconds every one should wait at the barrier and then release them to cross the barrier?

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