algorithmic modeling for Rhino


Geometry Gym BIM

BIM (Building Information Modeling) enhancements for Rhino and Grasshopper, import/export to Revit, Digital Project, Bentley and Archicad amongst others.  Also Structure modeling (including analytic) and Computational Geometry Tools such as mesh relaxation/inflation and tessellation tools.

Members: 1487
Latest Activity: on Thursday


Installation instructions are located in this discussion,

Discussion Forum

Geometry Gym- Sap2000 Seismic Anlaysis

Hi JonI am using the on Sap2000 v18 and Rhino 5.I have generated a simple box building with moment frames and typical cross section. It can parametrically be tapered and twisted and some other…Continue

Tags: Analysis, Seismic, Sap2000

Started by Ghazal Javidan on Thursday.

Align Section Profiles

Hi, I'm using the Geometry Gym add-in to Grasshopper to assign section properties and bake the sections to Autodesk Robot. Does anyone know how to get the section profiles to align to the top middle…Continue

Tags: alignment, section, ggInsertPoint

Started by Stefan de Jong on Wednesday.

insert point issue sap2000 v 18.0.1 1 Reply

Hi Jon,I think I found a problem in the insert point of sap2000 v18.0.1.I don't know what could be but I think you can fix easily..Cheers,Marco…Continue

Started by Marco Pellegrino. Last reply by Marco Pellegrino Sep 30.

Geometry Gym/ clusters? 1 Reply

Hi Jon et al.- wondering if the Geometry Gym SAP2000 components (or generally) have compatibility with GH clusters? The application in mind is development of a number of SAP2000 section models from a…Continue

Started by Jamie McIntyre. Last reply by Jon Mirtschin Sep 27.

How to trim a curve / brep

Hi guys,I am currently working on parametric timber shell structures for which I just started to make a parametric model, but I ran into a small problem, which I can not figure out. First I made a…Continue

Tags: brep, surface, hexagonal, Trim

Started by Sebastien de Wit Sep 27.

sap2000 solid element issue 1 Reply

Hi Jon.It is my first time with solid element and I wasn't able to import into sap2000 v18.0.1.There is no error in the solid property import but I didn't see Node and element.…Continue

Started by Marco Pellegrino. Last reply by Jon Mirtschin Sep 22.

Moved and rotated geometry on the RvtElement 2 Replies

Hi, Guys!I dont…Continue

Started by javier serrano. Last reply by Jon Mirtschin Sep 22.

sap2000 v 18.0.1 Release 2 Replies

Hi Jon.I don't know why but sap2000 don't see that some elements have the release.any advice?Best,MarcoContinue

Started by Marco Pellegrino. Last reply by Marco Pellegrino Sep 15.

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Comment by Hiroshi Amano on September 29, 2016 at 1:14am

Hi Jon,

Thank you for quickly sharing many interesting examples.

The grid loading component looks working well in my current case.

Kind regards,


Comment by Jon Mirtschin on September 28, 2016 at 11:49pm

Hi Hiroshi,

I have a bespoke grid loading component, but it doesn't seem to have been used much so I'd advise using the GSA functionality.

I just created a folder to put sample files in Dropbox, browse into the Samples > Structural Analysis > GSA folder and there is a grid loading script there.



Comment by Hiroshi Amano on September 28, 2016 at 8:25pm

Hi Jon,

I'd like to try to use ggGSALoadGridArea for assigning wind loads on a grid frame.

Do you have any example file of using that component?  I thought the component's parameters basically correspond to GSA inputs, but there are something I'm not sure how to assign in gg.

Thank you and regards,


Comment by simone moroni on August 22, 2016 at 3:53am

Hello, I'm trying to bake grasshopper 2D structure (is a section of my structural pannel) with the comand "ggSAPbakemodel" sap, but when I select "open model in SAP" it doesn't work and rhino goes to crash. I've SAP 14  version, is it too old for work with geometry gym?

Thank you very much for reply

Comment by lee ji yonh on May 9, 2016 at 1:14am

Hi Jon 

I see your post about IFC script(python).

At first, thank you about sharing your research.

I see your IFC python sample file.

But when I opened IFC python file, i happened error message.

Suddenly i wonder this cause.

Also, i am likely to studying IFC python script.

so I request you why this problem happened.

and how do i script correct for operating this component?

Comment by Jon Mirtschin on March 21, 2016 at 3:10am

Hi Derk,

If you add an analysis case, then you will get results.

I've emailed you the definition.



Comment by Derk Bos on March 20, 2016 at 3:06pm

Hi Jon,

I'm trying to do a non lineair analysis on a tensegrity structure in GeomGym. For some reason, however, I don't obtain any results.

The ggGSASolver component doesn't give any error message, but for some reason the analysis doesn't run in GSA. When I do the analysis manually in GSA it does work however. 

Do you have an idea what the problem could be?

Kind regards,


Comment by Jon Mirtschin on February 28, 2016 at 2:53am

Is this error in v18 plugin?  Can you start a discussion thread or post to this one and attached your model (or a sample of it).



Comment by Qi WU on February 26, 2016 at 2:14pm

Hi Clara, I don't see a profile library, that's way I am using a panel.

Here is error: 1. Solution exception:Object reference not set to an instance of an object.

I don't think it's a input issue, cz it's a solution exception.

Comment by ClaraML on February 26, 2016 at 10:38am
What's the error in the red globe? Does it work if you use the profile library instead of a panel for set the profile?

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