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.

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Latest Activity: 5 hours ago


Installation instructions are located in this discussion,

Discussion Forum

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 5 hours ago.

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 18 hours ago.

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 on Friday.

Moved and rotated geometry on the RvtElement 2 Replies

Hi, Guys!I dont…Continue

Started by javier serrano. Last reply by Jon Mirtschin on Thursday.

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.

Selecting and restraining nodes out of a list 1 Reply

Hello everyone, I am currently trying to analyse a structural model in GSA. I face  some difficulties though, when trying to isolate the nodes that are on the ground (or z = 0) from the list of the…Continue

Started by Georgios Drosos. Last reply by Jon Mirtschin Aug 29.

Error in Revit 4 Replies

Hi All,I have a problem with import of ifc file in Revit (created in grasshopper). See screenshot included. Does anyone know how I can solve this problem?Thanks,HalimContinue

Started by Halim Yilmaz. Last reply by Halim Yilmaz Aug 23.

Mesh join and parametric loading of elements 1 Reply

Hi everyone, I am trying to join two meshes and subsequently bake the structure to GSA in order to perform an analysis. I am facing two problems though. First of all I am having a hard time joining…Continue

Started by Georgios Drosos. Last reply by Jon Mirtschin Aug 5.

Comment Wall


You need to be a member of Geometry Gym BIM to add comments!

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?
Comment by Qi WU on February 26, 2016 at 10:26am

Hi Jon, For the latest version of ggSAP, the ggSAPCreateFrameProp component is not working properly. Is that a bug? It was working fine in your v17.1.1.

Comment by ClaraML on February 17, 2016 at 2:04am

I'm having a problem with GG and SAP2000. I'm using SAP2000 18, not 17. And I've detected at least one component (the library material) that search for information in the SAP17 route. Is there any way for changing that route and make the component search in the correct route? If not, I can duplicate the SAP18 folder and rename it like SAP17, so the component could find the information. Do you think it will work?

Comment by lee ji yonh on February 2, 2016 at 8:52pm

Hi Jon,

Currently i have a problem to create a column. I don't know what i should do. how do you make a logic? Now this problem's message is "overcast will not be column type"

Kind Regard, 

Jiyong Lee


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