algorithmic modeling for Rhino



PedSim is a Grasshopper plug-in that runs simplified pedestrian simulation in Rhino modeling space in real time. It can be integrated in your Rhino workflow for master plan, public space, commercial and other architectural projects, accelerating design iteration and creating new opportunities for design automation.

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Members: 39
Latest Activity: May 22

Discussion Forum

PedSim Pro

PedSim Pro is here! If you use PedSim but feel it too limited, please check out Pro. …Continue

Started by Peng Wang May 30, 2020.

PedSim questions and feedback

Hi, everyone,Thank you for downloading PedSim! Over the past few years it has reached thousands of users. What do you like and dislike about it? Any questions?Continue

Started by Peng Wang Nov 9, 2017.

Comment Wall


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Comment by Carlos Rios on March 23, 2021 at 12:25pm

Thanks Peng,

Will this feature come with an automatic update, or will it require a manual install of some kind?

Also, can one use transparent obstacles to achieve the "waiting line" mentioned earlier as a reliable alternative approach until the feature is released?



Comment by Peng Wang on March 23, 2021 at 10:28am

Hi, Carlos, this feature is coming soon in PedSim Pro.

Comment by Carlos Rios on March 23, 2021 at 9:59am


I've been using PedSim for a couple of days now and have been able to set up my desired scenarios with some success. One thing that I am not sure about is how to make people wait and move in a structured line like one sees in airports waiting for a free ticket booth. I have been able to have people access the ticketing counters, but they tend to bunch up.



Comment by Peng Wang on September 29, 2020 at 7:10pm

The 3D people is a Grasshopper trick. You can download the examples or do it yourself:)

Comment by Monkey on September 29, 2020 at 7:08pm

Thanks Peng,

It works Perfectly! Thank you! One quick question, on your webinar, I saw you can see 3d people moving along the space. but I don't know where to turn on the 3d people for V0.12.3 version, my people are still flat dot. Is that feature only for PedSim Pro?

Comment by Peng Wang on September 29, 2020 at 6:58pm

Hi, Monkey, you need to connect "Settings" component to the "Engine" and turn on "EnableTrace"

Comment by Monkey on September 29, 2020 at 6:46pm


I have PedSim V0.12.3 on my laptop, And I have begin to develop some basic script and trying to extract pedestrain speed by deconstruct person record. However,  the Ped simulation component it shows none for the record for me to deconstruct. Does any one have some idea for this?


Comment by Peng Wang on July 7, 2020 at 9:12pm

The Settings output should be connected to the Settings input in the Engine. If you hover over the input names, you can see their full name. I plan to add some documents explaining them. The only tricky inputs are "ObsCoefA" and "ObsCoefB". The other ones should be straightforward: 

FPS: Frame per second, controls how big is the simulation time step.

ObsOffset: controls the route graph. See this page:

ObsFMax: maximum obstacle repulsion force

ObsThreshold: minimum distance where a person experience repulsion from an obstacle

EnableTrace: Set True to enable trace, works with DeconstructPerson component.

Comment by Dylan Deguzman on July 6, 2020 at 8:25am

I will run some more and try to notice the difference. Can you please explain the system settings input parameters? Is there any purpose for the settings output? Thanks for your response. 

Comment by Peng Wang on July 4, 2020 at 5:42pm

Hi, Dylan, Thank you for your comment! You need to "reset" the Engine for the new setting to take effect.

The people seek the access point with the shortest queue at the time they look. Once they decide, they don't change targets (this is different from PedSim Pro).

One reason for introducing Access Point is to allow a Target to have multiple visitors at once. Therefore, maybe it is not necessary to allow Access Point to have multiple visitors? If you need you can always add access points.


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