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: 1623
Latest Activity: Jan 12


Installation instructions are located in this discussion,

Discussion Forum

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.

Change profile alignment/insertion point 2 Replies

Hi,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,…Continue

Tags: Section Profile, Alignment, ggInsertPoint, Insertion point

Started by Tina Irvine. Last reply by Tina Irvine Jan 28, 2019.

Comment Wall


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

Comment by Perwiro on January 16, 2012 at 3:15am

Hi Jon..,

First time I saw the tutorial and what could be done by StructDrawRhino, I was amazed.

But still, up to now I can't try it yet, the first license you gave to me actually work, but when I install the Latest Grasshopper, my Rhino crash with GH, then after several time finding the solution, I found that it need to install Visual C++ 2005, then I install it and it works...

But, suddently my license's broke. Then I ask you for the other one, I have updated my license with the new one you gave me, but it didn't work

Could you help me out?
 I use Rhino SR 9 and Grasshopper 0.8.0065

Comment by Ali Bousta on November 27, 2011 at 11:46am

Thanks for the tool , more succes in your researches

Comment by ismail on November 12, 2011 at 10:01am

Thank You, Jon! I recived your email with license file. All works perect.

but when I try to open IFC Rhino closed?

Comment by Jon Mirtschin on November 11, 2011 at 1:58am

Hi Avihay,


Great, and very glad to hear.  I've said numerous times, IFC suffers from a chicken and egg situation that it's implementation by software vendors isn't improving when no one uses it (because it's hasn't been implemented properly by software vendors).  

If you've more ideas and suggestions for improvement, let me know.

Comment by Avihay Bar on November 11, 2011 at 1:40am

Hi Jon, 
wanted to plug in here and say


I really appreciate the time and effort you have put into GeometryGym & IFC. this is quickly becoming a must-have tool in my workflow!



Comment by Red Hxh on November 10, 2011 at 5:55pm

Thank You, Jon! I have  just recived your mail whith license file. All works perect.

Comment by Jon Mirtschin on October 15, 2011 at 5:56am

Hi Zhushunlai,


Someone did recommend a couple of papers to do with stream lines from vector fields which I glanced at (or some algorithms in open cascade or similar if I recall) but in the end I started playing around with an approach in an iteration to find the most remote vector and then using a momentum approach process through the field based on spacing distance.  I would like to find some time to improve and refine this method, but it's difficult at present.  Hope it helps, Jon

Comment by zhushunlai on October 14, 2011 at 9:02am
hi,Jon, is there any paper about the algorithm about how to
form the Principal Stress trajectories net?give me some advices.of course thank is must!
Comment by Jon Mirtschin on August 25, 2011 at 11:27am
I apologize to all members, unfortunately I wasn't signed into the gmail account today that this message was sent to today, else I would have immediately blocked this user (which someone else has already done so).
Comment by Astro/Naught on August 25, 2011 at 8:08am
Either way, it's getting tiresome.

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