algorithmic modeling for Rhino

Jon Mirtschin's Comments

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At 10:01am on February 16, 2018, Scabinus said…
Dear Jon,
I find your ggmeshtobrep command in rhino very usefull, why you did not develop it for
At 8:52am on June 23, 2017, Omid Karami said…

Hi jon

I downloaded your Geometry gym Plug-in, unfortunately it does not work because its license expire. How should I do? And I have one more question: How does gtt Plug-in work?

My email address is:

Yours Sincerely


At 12:27pm on October 20, 2016, Sebastien de Wit said…

Dear Jon,

I have some serious troubles getting the surface properly meshed with equal lengths, prior to the form finding part. Perhaps Kangaroo itself is able to do this? Hope you can help because meshing odd surfaces instead of rectangular shapes is not often shown on the forum.

Yours sincerely,


At 3:42am on July 18, 2014, shahryar said…

Dear Jon,

I am trying to import one gbXML file which was exported by Revit .I have  loaded it in Ecotect to apply material. Now, I am planning to import in Rhino to analysis in grasshopper. I have downloaded geometrygym plugin but it does not work in Rhino and just appears in grasshopper. Would you please guide and help me by offering any information how I can to import gbXML files to Rhino.

Yours sincerely,

At 10:41am on August 27, 2013, Gabriel Áh said…

hey Jon, 

 Im trying to use geo gym, but this legend pops out:

where can i get the free evaluation code and then extend it to the educational version

by the way thanks for sharing, and congrats for the hard work



At 12:43pm on June 7, 2013, Mehdi Hasanzadeh Samadi said…

is there any plug-in for revit 2013 32-bit too ? i just see the 64-bit version !!

At 3:36am on January 16, 2013, trung1133 said…


i am not able to learn anything from the example files as some things turn red!!! then back to orange if i remove the NAME (N) i.e. nameless component

please help

At 11:25am on January 13, 2013, John Stanford said…

Hi Jon, thanks for adding, i'm pretty interested about your work and i've been looking around your site some time ago.

i've been using grasshopper only for quiet sometime now, so im still trying to figure out the basic stuff, but i think it would provide such a great help in doing my architectural studies combined with BIM software at hand

has there been any new update about grasshopper and archicad connection?


At 8:43pm on December 20, 2012, Chansoo Byeon said…

Hello Jon

Thanks for the add! 

Could you give me some tips of where I should start? I really want to master Grasshopper.

At 5:35am on October 28, 2012, Guido Nieri said…

Hi Jon,

I am a student and I am interested in your plug-in. I would like to use that on my thesis, are there any student version?

Thank you

At 3:31am on August 14, 2012, djordje said…


I knew we can count on you, you Australian genius !!!

At 5:07pm on August 13, 2012, djordje said…

Jon I took a look at your article about Rhino/Grasshopper to Vasari import.

Is there any other way to eliminate the Revit in the process of importing?

At 6:12pm on July 6, 2012, Diego Xavier said…

Hi Jon!

Thank you for the Geom Gym activation. I´ll be participating in a workshop that maybe will use your software!



At 11:21am on June 20, 2012, Herwig Scherabon said…

Hi Jon, thanks for the friendship and sending the license so quick!

Just one question: am I able to transfer the xml to my other computer, or do I have to send a new license request?

I stupidly sent my request from my macbook and actually need to use GG on my tower ;)

At 4:06am on June 16, 2012, stefano vafiadis said…

Hello Jon, I received yesterday night your reply: thanks for the license and for the friendship too, I'll send you my student credentials when the end of the trial period will be near.

Cheers, Stefano//

At 10:27am on April 26, 2012, Lara Behmoaram said…

 Hi Jon,


I'm still enjoying using the GG tools very much, but i just ran into a problem which i could not understand why its happening.


I am creating a customized voronoi network system, splitting the voronoi cells into different parcels based on site information.


I am splitting a field of voronoi cells into different regions created by the sdrnetwork polygon;afterwards rebuilding the split groups with higher degree to get closed cells.


However, as you will see in my script, the voronoi nerves which seem to be intersecting with the perimeter of the region come off as they werent touching the perimeter, resulting in unclosed cells.


I would really really appreciate it if you could have a look what might be going wrong.



At 12:01am on April 20, 2012, Jonathan French said…

Hi Jon,

Thank you for sending the license information so promptly, I look forward to figuring out the plug-in!  Cheers!

At 7:43am on February 17, 2012, architectenes said…

hiiii.gym licence

Do you know who sent me?

please :) 


At 9:51am on November 9, 2011, Daniel Prohasky said…

Hi Jon,


I am an Architecture student at Monash and just recently finished a Bach in civ. Engineering (last Monday!!) :)


I have been playing around with Grasshopper on and off for a bit over a year. However, I haven't had the privilege to try out geomgym and would love to expose its capabilities. I've got a couple of designs I have completed fairly recently that may present an opportunity to make the most of GG.


At present I am messing about with a snub geometry solver. I originally solved the script manually with sliders (tedious), galapagos wasn't quite accurate enough so I created a 2 level loop using hoopsnake which boosted the accuracy to grasshopper's capabilities, however, this is time dependent.


The current convergence method is parabolic, but Hoopsnake's ability to be paused mid-loop or even just manipulated during the loop presents the opportunity to manually change the step factor while the loop is running (but this obviously needs user input during the looping process).


I'm thinking that it would be possible to define a more dramatic convergence curve that could increase the solving rate and hopefully generalise it, so the curve is not dependent on the starting values. I don't think I'll touch this for a couple of weeks, but I'm open to any suggestions...??


The snub example will be on the Hoopsnake page shortly.


Thank you

At 10:42am on September 7, 2011, Roig said…

Hi jon, 

I don't know if there is a better place for posting questions about GG.

Until you tel me so, please help me with one issue:

I´ve got this in GH:

and what i'm trying to do is to set a certain profile to the vertical lines oriented along the normal vectors (or any set of vectors) at vertex of the main cilinder.


I've got the lines, the normal vectors and sdr CP component defining the profile already, and the thing is that I can't find the way to use them, won't tell you about trying to orientate the profiles¡¡¡ I'm sure it's something about me, pure rookie;) 


Thank you. Roig


Thank you





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