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: 1629
Latest Activity: Mar 24


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.

Comment Wall


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

Comment by Michel Cassagnes on February 4, 2013 at 11:02am


I found the problem : i did'nt feed the N input of  ggQueryNodeDisp with correct data : N must be a ggNode output. But I get no results from ggS !

Comment by Michel Cassagnes on February 4, 2013 at 10:42am

Hi everybody,

I try to use the ggRobotSolver to get the results directly within Grasshopper. The ggQueryNodeDisp gives a runtime error (see image).

Did someone already use this feature ?

Jon, could you explain how to proceed or send an example ?


Comment by Jesper Thøger Christensen on October 29, 2012 at 11:19am

How to apply a lineload ?
I suppose one should use ggCUDL.

But when i export to Robot the load vector is zero.

What to do?

Comment by Jon Mirtschin on October 16, 2012 at 4:43am

Hi Matt,

I've put my response to your question into this discussion thread:

Comment by Matthew McFetridge on October 16, 2012 at 4:04am

Hi Jon, I am wondering what value I need to put into the RHS component to create the fillet? I have tried 0.1 to 1 and up to 90 with an expression to turn it into radians. Everytime the corners have remained at right angles. What vaule would you recomend? Or have I got something wrong?


Comment by Jon Mirtschin on September 14, 2012 at 6:36am

Congratulations on being the 1000th member, it's a milestone I'm very thrilled to achieve and hope reflects on the benefits users are getting from my developments for Grasshopper.

Comment by Kacper Radziszewski on September 14, 2012 at 5:56am

looks like I'm 1000th member

Comment by first1 on June 27, 2012 at 8:08am
Comment by first1 on June 27, 2012 at 8:04am

test model

method 1

method 2

Hi Jon

I want to put this several pieces of rhino surface into revit, I try to use the above two kinds of methods, but it didn't worked , Have you what a good method to deal with this problem?Thanks for any help !

Comment by Wouter Brok on June 18, 2012 at 9:47am

Hey Jon,

I've a question about the GSA link settings in Grasshopper. How can I define the link settings in the SSI plug-in? I want to set the link on only tension but can't find a way to do this. 

Thanks in advance,


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