algorithmic modeling for Rhino

Jon Mirtschin
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Lock GH UI
6 Replies

Started this discussion. Last reply by huaxiamengqing Jun 4, 2015.

5 Replies

Started this discussion. Last reply by David Rutten Nov 23, 2012.

Shatter periodic nurbs curves
6 Replies

Started this discussion. Last reply by Jon Mirtschin Apr 21, 2012.


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Latest Activity

Jon Mirtschin replied to Josef Taylor's discussion Grasshopper to IFC in the group Geometry Gym BIM
"Hi Josef, Thanks for posting, indeed the IFC components are quite intimidating and not very intuitive, which is why a few years ago I added the ggRVT components (that still generate IFC). But if you are already using the gg plugin to exchange from…"
Apr 10
Scott Rathie commented on Jon Mirtschin's group Geometry Gym BIM
"Hi I am pretty new at using geometry gym for GSA structural analysis and was wondering if there is a way to query modal frequency"
Apr 7
David Delgado Vendrell commented on Jon Mirtschin's group Geometry Gym BIM
"Any Archicad user with a bit of experience with AC-GH Live Connection ? "
Mar 26
Jon Mirtschin replied to Jam's discussion Import GBXML file
"Hi Jam, I've developed a plugin to do this, it's available at Cheers, Jon"
Mar 23
Gery replied to Jon Mirtschin's discussion SAP2000 in the group Geometry Gym BIM
"Hi everyone, I'm trying to explore ggSAP. When I want to bake examples by first going on "Open Model in SAP", Rhino crashes. If I click on "Bake model", nothing opens neither. I'm using latest v19 of…"
Mar 6
Jon Mirtschin replied to Daniel's discussion Will Dynamo become a big thing in 2017?
"Hi Peter, If a project participant is producing 600+ necessary drawings, describing the interaction as BIM could be expressed to be an exaggeration.  Presently there is still a huge requirement of drawings due to contracts and processes from…"
Feb 28
Hakam husam commented on Jon Mirtschin's group Geometry Gym BIM
"Hey guys, ive been trying to use GG plugin, unfortunately I am an architect not a structural engineer, no clue in how to know what each section in the catalogues is shaped like, how can I find out this ? is their a PDF catalogue ? my 2nd question,…"
Feb 27
Jon Mirtschin replied to federico caputo's discussion How would you approach modelling something like the Morpheus Hotel by Zaha hadid?
"This isn't the approach used, but it is possible to achieve a somewhat similar effect using dynamic relaxation in Bullant or Kangaroo if you're looking at exploring the design in Grasshopper.  Refinement by sub-d could help achieve a…"
Feb 24
Yutaka takenochi replied to Jon Mirtschin's discussion Grasshopper Plug-in : StructDrawRhino
"hi Jon Many thanks, I  will download it. Are there any tutorials for the BullAnt?  Also watching your presentation, very informative,, hope your throat is better now! cheers Yutaka"
Feb 24
Jon Mirtschin replied to Jon Mirtschin's discussion Grasshopper Plug-in : StructDrawRhino
"Hi Yutaka, Thanks for the question. StructDrawRhino was renamed to bullant a few years ago, so try downloading that. You might find the ggRhinoIFC plugin is more powerful in this area though, especially if you want to transfer the model to a…"
Feb 24
Yutaka takenochi replied to Jon Mirtschin's discussion Grasshopper Plug-in : StructDrawRhino
"Hi Jon How do you do? I am here as I wanted to sweep multiple rails with one sectional shape and learnt of the "structuraldraw" plug-in will perform this way. Could you be so kind to let me know as to where I can download the plug-in? I…"
Feb 23
Jon Mirtschin replied to robert cervellione's discussion minimal surfaces
"Well, it can create a mesh representation of it.  See if this helps."
Feb 18
Jon Mirtschin replied to michael sprinzl's discussion Convert Rhino.Geometry.NurbsCurve to Autodesk.Revit.DB.NurbSpline
"Yes, Revit has a constrained capability with regards to nurbs (Such as your note above about degree 2, or the number of control points). The Geometry Gym Revit plugin rebuilds a hermite spline by fitting points in the case that direct conversion…"
Feb 17
Jon Mirtschin replied to michael sprinzl's discussion Convert Rhino.Geometry.NurbsCurve to Autodesk.Revit.DB.NurbSpline
"The definition of a nurbs curve in Revit in comparison with OpenNurbs is only differing in that Revit uses a definition with two additional knots, so make sure you add a duplicate of the first and last in your conversion. Note that often Revit…"
Feb 17
Jon Mirtschin replied to Evan C's discussion generating closed cells from grid lines
"Hi Stephane, Can you please post or email to me the script so I can give specific advice? Cheers, Jon"
Feb 8
Jon Mirtschin commented on Jon Mirtschin's group Geometry Gym BIM
"Hi Mostafa, I just emailed you, refer to for license request procedure."
Dec 15, 2016

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Jon Mirtschin's Blog

Geometry Gym Plug-ins - AEC BIM and Computational Geometry

Grasshopper plug-ins assisting Architectural and Structural modelling including BIM under constant development and improvement.  Computational geometry solvers useful to many other designers.

StructDrawRhino is a Generic Structural…

Posted on April 17, 2010 at 12:00am — 11 Comments

Comment Wall (35 comments)

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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?



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