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: 1631
Latest Activity: May 5


Installation instructions are located in this discussion,

Discussion Forum

Student licens 2 Replies

Hi Geo Gym.I'm a student at Aarhus University in Denmark and my trial license has expired.Is it possible to get a free student license for a year?If yes, how ? Best RegardsTroelsContinue

Started by Troels Meldgaard Jensen. Last reply by Isabella Butts Feb 25.

Load Case Combination

Hi..I'm trying to use the GeometryGym plug-in "ggRhinoRobot" to perform a structural analysis model.I want to define different load cases and different combinations of these load cases. But the…Continue

Started by Zaineb Tounsi Oct 15, 2019.

IFC to Revit inserts at wrong location

Hello,I am trying to get my IFC Data(simple box geometry) into Revit. The geometry was "traced" from point cloud data and therefore is georeferenced. When I import the IFC data and point cloud into a…Continue

Started by Tim Barnes Jul 24, 2019.

transfer rhino to sap

hi,can anyone help me about this: i want to transfer my rhino file in to sap2000 v20,and i'm new to sap.i found out that i should use the geometry gym i downloaded […Continue

Started by mahsa May 21, 2019.

Mass Source Modification in ggSap 1 Reply

Hi JonI am using your very helpful ggSap plugin for more than 1 year for my Ph.D thesis.Now, I wonder to know is there any way to modify "mass source" for seismic analysis in ggSap?I mean, Sap2000…Continue

Started by Ghazal Javidan. Last reply by Alessandro Buffi Apr 19, 2019.

SAP2000 42 Replies

Here's a thread for questions and suggestions specific to the Geometry Gym addon to interact with SAP2000 Structural Analysis.  Note you can filter my blog for posts/examples specific to SAP 2000…Continue

Tags: Analysis, Structural, Gym, Geometry, SAP2000

Started by Jon Mirtschin. Last reply by Jon Mirtschin Mar 30, 2019.

Oasys GSA 50 Replies

A discussion thread for posting questions and examples relating to Analysis model generation in Grasshoper to Oasys GSA.Wouter Brok raised the question here…Continue

Tags: Geometry, Gym, Analysis, Structural, Oasys

Started by Jon Mirtschin. Last reply by Jon Mirtschin Mar 30, 2019.

How to obtein moments reaction in different points?

Hello everyone!I can get node displacement at any point, but i can´t do the same with Moments.I can get moments reactions at the start point and the end point, but I can´t do the same at any other…Continue

Started by Andrew Feb 7, 2019.

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Comment by nathanluke5 on May 5, 2020 at 9:01pm

Hi Diego, try updating your Etabs Plug-in. If it doesn't fix your issue please contact and we will gladly help you with fixing the issue.

Comment by Diego Abelino on May 4, 2020 at 7:22pm

Dear Jon,

I'm currently using Geometry Gym to create Frame elements, assign section properties and attributes to take into Etabs18.

the problem, that I'm facing is that the frame attribute "name" in the component "ggETABSFrameAtts" get not exported to Etabs. I can modify all the other attributes, but when I bake the model, the name of the Frame elements keep defined by default and not like I had defined previously with the component. Do you have any advice to solve this issue?



Comment by Ming Chong on July 18, 2019 at 4:17am

Hi, Just wondering do you have any plan to expand the functionality of GGEtabs, include components like diaphragm assignment, wind load assignment, ability to run analysis without bake and save, etc. That would be super helpful.

Comment by Schwarzchild on April 26, 2019 at 7:43am

Dear Jon,

I am using ggrhinoSAP to buid my model,when I bake model to sap2000,it says  "xxx SAP2000 not installed or in unexpected location",how can I solve this problem?

my sap2000 version:V17

Appreciate if you can help on that.


Comment by Tina Irvine on January 15, 2019 at 8:06am


I am using Geometry Gym to create elements and assign section properties to take into GSA.

I want to change the insertion point of the profile to "top left", rather than the default setting, "middle". I am trying to use the tool "ggInsertPoint" to change where the section is aligned, but without any luck.

How do I plug "ggInsertPoint" into the beam section properties? 

Thanks, Tina

Change profile alignment/insertion point

Comment by Jon Mirtschin on January 6, 2019 at 10:56pm

Hi Mojtaba,

Yes, we support Rhino5 and Rhino6 and all builds going forward will by default support Karamba 1.3.1 as it's now official.  I can still support Karamba 1.2.xx on demand, and if you're already using nightly builds such as 1.3.2 contact me as this requires a specific build.

Comment by mojtaba zareie on January 4, 2019 at 3:15am


is there any way to bring karamba models to sap2000

I'm using Rhino 6 and the new version of karamba .

Comment by Jon Mirtschin on October 24, 2018 at 2:33am

Unfortunately I believe the ETABS api has no provision for creating grids.

Comment by Manuel Muehlbauer on October 24, 2018 at 1:50am

Hi Jon, is there a way to create grids with ggETABS?

Comment by Ming Chong on September 23, 2018 at 6:06pm

Dear Jon,

I'm having issue to convert the karamba model to GSA model.

The error message I'm getting are "1. Field not found: ''."

Appreciate if you can help on that. Thank you.

Rhino version:5

Karamba version:1.3.0

GSA version: GSA9.7


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