algorithmic modeling for Rhino

Pachyderm Acoustic


Pachyderm Acoustic

Pachyderm is a plugin largely used by Designers and Scientists alike to simulate acoustics in buildings, rooms, cities, and other settings.

Location: Earth
Members: 59
Latest Activity: 19 hours ago

Discussion Forum

Pachyderm Numeric_Time_Domain 2 Replies

This is a location where we can discuss anything to do with the Numerical simulation tools available in Pachyderm. Please feel free to play around, comment, ask questions, make suggestion, etc.Continue

Started by Arthur. Last reply by Daniel Horta 19 hours ago.

confidence in results 8 Replies

Hi,I'm new to Pachyderm - I'm trying it out to see if I can use it to help with architectural design.  I've studied masters level acoustics at university, and have used Odeon before, though don't…Continue

Started by Ben Dixon. Last reply by Arthur Mar 7.

Installation issues 25 Replies

This is a place to ask qustions about installation. Please post your questions here and I will get to them as quickly as I can.Continue

Started by Arthur. Last reply by Arthur Feb 18.

Designing the chairs and mapping the listening area 1 Reply

Hi Arthur, Question about design seats. I watched Prof. Isak Worre Foged’s videos.I understood how to display the results in the listening area. But in doing so, the Concert hall chairs are not…Continue

Started by GiuBond. Last reply by Arthur Feb 7.

Comment Wall


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Comment by oneiric on December 11, 2017 at 12:02am

Hi Authur,

Thanks so much for your reply.

Now I have already know how to save the data and read the data in gh and had no prob with NURBS scene

I would like to know what is the data to be connected to Room in Visualize Pachyderm Rays component? From the hint when I tried to connect brep to Room, I connected NURBS scene to it. It gives me the error saying 'Object reference not set to an instance of object'

Sorry for the trouble to have to explain to me step by step...


Comment by Arthur on December 5, 2017 at 7:29am

Hi Oneiric,

GL wants one integer for each piece of geometry you put into GG. This integer will be the zero-based position of the layer in the Rhino layer dialog. The layer titled 'default' generally appears first in a new document. That would be layer 0. The next layer you add would be directly below 'default' and would be layer 1, and so on.

What the scene component is looking to do is get the materials you have assigned to that layer in Pachyderm for Rhino. This is the most obvious way, perhaps that Pachyderm for Rhino and Pachyderm for Grasshopper work together. They share resources like materials.

The connection will be deepened in the future, as I develop certain other tools. Stay tuned.


Comment by oneiric on December 4, 2017 at 5:21am

Hi Authur,

Thanks for your creation of this plug-in. 

I have read all the tutorial on the website and the comments & discussions here. I do not see how gh and rhino plugin could work together. Is there any example for me to learn more about it ?

Or may I know for NURBS Scene component, what should be plugged into GL? What is the integer id of the layer in the description?

Thank you!

Comment by Abdulaziz Albasseet on September 26, 2017 at 8:57am

Where can i download?

Comment by Han Deng on September 24, 2017 at 11:44am

Hi,I want to figure out how to use it in grasshopper, could you sent me the example file of grasshopper to my email?

Thanks very much!

Comment by Arthur on July 23, 2017 at 5:44pm

Hi all,

Daniele and I have worked through the issue. It seems to me that this is not terribly clear in the website documentation, so I will say it here. Your model must be in meters for it to work correctly in Pachyderm. Maybe someday I will fix this, but for now, in order to prevent  an onslaught of bugs, please work in meters.

Rhino makes it pretty easy to fix this. I can be a little trickier in Grasshopper, but still not overly complicated.

kind regards,


Comment by Daniele Rizza on July 23, 2017 at 11:25am

Can you send me your email to send you the project?
Or write it at
Thank you

Kind regards,


Comment by Arthur on July 23, 2017 at 10:26am

Hi Danielle,

There are no limits, and your problem seems very different from Stracus's problem. His originated in the Scene class, and most likely had to do with his model. Yours, from your picture, occurs after running a simulation, and has to do with composing the Impulse Response.

I can't tell what is wrong with it from your picture. Please email me your files and I can have a look.

kind regards,


Comment by Daniele Rizza on July 23, 2017 at 9:44am

Hi Arthur,

Like Stracus, when I launch my analysis, appears an error that says "Index beyond the matrix limits".
Where is it possible change these limits?


Comment by Arthur on July 13, 2017 at 6:38am

There is no limit on the number of surfaces which can be handled, but if any of them cannot generate a render mesh, it may crash.

You will have to trouble shoot your model in order to make sure that none of the geometry is bad.

I don't understand your second question. Could you please explain?


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