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: 1431
Latest Activity: Nov 17


Installation instructions are located in this discussion,

Discussion Forum

IFC to Revit error 1 Reply

When I import the IFC to Revit, it show error, no matter I use any IFC files including the examples files, I have never imported successfully, I don't know why.Following is the error message showed…Continue

Started by zdjdevil. Last reply by Jon Mirtschin Oct 22.

Errors after SAP2000 model locks

Hello,I'm working with G interacting between Grasshopper and SAP2000.Everything works fine, I can bake multiple times my GH model and SAP updates with no problems.All that until I run the analysis…Continue

Started by michele tonizzo Sep 4.

Import to Revit 2015 2 Replies

HiI've built this structure in rhino/grasshopper, but now i have a problem:I've been trying to import this structure using the geometrygym tools, but still no sucess (still don't get how to use…Continue

Tags: Import

Started by Refej. Last reply by Refej Aug 5.

SAP2000 Load combinations

I wanted to check the deflection at mid point of truss for service load combo i.e.Service combination: 1Dead Load Case+ 1Live Load CaseI have tried the sequence as shown in the attached Image…Continue

Tags: combination, load, deflection, geometrygym, SAP2000

Started by Usman Altaf Jun 9.

Autodesk Robot Structural Analysis 15 Replies

A discussion thread for posting questions and examples relating to Analysis model generation in Grasshoper to Autodesk Robot Structural Analysis.Continue

Tags: Gym, OpenBIM, BIM, Geometry, Analysis

Started by Jon Mirtschin. Last reply by Hairault Jun 3.

Optimization with Galapagos 2 Replies

Hi Jon,I finished the modelling part of the project. What I wanted to do is to optimize the structure with Galapagos with the data that Geometry Gym obtained from GSA.I set different variables and…Continue

Started by Stefan. Last reply by Stefan May 29.

Optimization with Geometry Gym error when obtaining results 2 Replies

Hi,I finished the greatest part of the bridge optimization project with Grasshopper and Geometry Gym. From the results I can obtain the node displacement and the maximum node displacement.I also…Continue

Started by Stefan. Last reply by Stefan May 25.

Tube optimization with Geomgym and GSA 2 Replies

Hi,I am currently working with the great Geometry Gym plugin for my tube bridge project. I made a model of the bridge with several variables that can be adjusted in Grasshopper. What I am trying to…Continue

Started by Stefan. Last reply by Stefan May 24.

Comment Wall


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

Comment by Zhengyu Xue on March 22, 2015 at 4:22am

Hi, Jon,

Do you have any related videos about how to do structural analysis about shell structures?

Kind Regards,

Xue Zhengyu 

Comment by Jon Mirtschin on February 17, 2015 at 1:31pm

Hi Tim,

For GSA, you need to manually start GSA application (and close the default opening dialog) prior to any baking.  Else when a plugin initiates contact, the application is started as a background service (that the user can't access).  I can't control this, but the background service is useful for faster performance (when say running galapagos) and not having to manually close dialogs.  The Oasys webinar below has some explanation on this.

Hope it helps.

Comment by Tim on February 17, 2015 at 9:37am

Hey everybody,

Currently I have problems with baking my grasshopper structure into Oasys GSA. When I push the "bake to GSA" button, nothing happens. In my Rhino command window it says: 

Material Count: 1, SectionProperty Count: 1, Node Count: 441, Element Count: 1240
Load Case Count: 1

So apparently there is no error.

Could anyone please help me?

Kind regards


Comment by 建筑师哈哈 on October 5, 2014 at 11:31pm

Comment by MARTIN on August 21, 2014 at 8:34am

Hi everybody !

I have used grasshopper for few years, and I don't reach to understand the basics of the geometry gym for SAP2000 components.

Does somebody have a small tuto or a video to help me to understand how I can export my rhino model to SAP2000 ?


Comment by I_M_F [Iker Mugarra Flores] on June 5, 2014 at 10:20am

Hi Jon,

hope you are well, I have been thinking on testing how to export parametric models into Revit and I was wondering if I need to install your other IFC plugins in addition to " + REVIT/VASARI 64 Bit Installers, contact me for 32 Bit?



Comment by horst Becker on March 19, 2014 at 9:33am

ok, found the problem: the tolerances in my rhino ducument were too low....

Comment by horst Becker on March 19, 2014 at 3:39am
I run into a problem trying to import profiles with the ggCatalogueProfil Component.
I save my user profiles in the right direction. Usually it works very well, but now I have the problems that I cannot load the open surfaces as a brep...I just get the outline curves of my profiles.
any idea?
And second question: is it possible to import differnt profiles which share the same 0 Coordinate. That after loading them into my definition they share the same insert point?
Comment by Mona Gh on March 3, 2014 at 11:17am

Thank you Jon for your response. I did the same.

Comment by Jon Mirtschin on February 25, 2014 at 2:20pm

Hi Mona,

If you look at the dome in elevation, you can see splitting into a hemisphere won't get you integral shapes.  If you can split above or below (as indicated on attached image) shapes will be rational but some will be halved.  Not sure if this helps or not.


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