algorithmic modeling for Rhino

Grasshopper > AutoCAD Open Source Plug-In

I have released an open source plug-in which allows Grasshopper to send commands directly to AutoCAD using COM.  I have tested this on my machine running AutoCAD 2011 64-bit on Windows 7.  


I have released the source code so hopefully the bones can be used for different purposes and software versions.


If you develop a cool use for this, let me know!  I would love to feature it.




The plug-in and source code are available at the Slingshot! development website...

Click here for the Grasshopper > AutoCAD plug-in...


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Comment by Jasper Cohen on July 15, 2015 at 9:32am

the link for your plugin is not working. I would really really like to try out this plugin for myself, please let me know if I can get a hold of it. Also I'm using autocad 2012, will that be a problem?

Thank you for making this hopefully very useful software!

Comment by Rémy Maurcot on March 16, 2015 at 11:45am

Wow, it's wonderful

Comment by Mohammadreza on March 20, 2013 at 1:09am

Thank you,

It's amazing and useful

Comment by Mario Hernandez on July 21, 2011 at 6:34pm
Please, examples use Autocad Open source plugin, thank
Comment by MARIO VERGARA on June 25, 2011 at 4:37pm
Thanks for the explanation Nathan.
Comment by Nathan Miller on June 25, 2011 at 11:17am


It looks as though you are using AutoCAD 2010.  I have only tested the plug-in on machines with AutoCAD 2011.  The message you are getting means that the plug-in cannot find the proper version of a reference assembly.  In Visual Studio, you may need to reference your AutoCAD 2010 Type Library (the current plug-in was built with references to the 2011 assembly).  After doing this, you will need to "Build" the plug-in for use with your older version of AutoCAD.

Comment by MARIO VERGARA on June 25, 2011 at 10:16am


Sorry for the ignorance, never used Visual Studio.

I have attached an image of what i am getting right now.

Do I have to execute something in Visual Studio, install a file or something?

Comment by Steve Lewis on June 24, 2011 at 3:44pm
Comment by Nathan Miller on June 24, 2011 at 8:42am


The source code is a Visual Studio 2010 project folder.  You will need Visual Studio Pro or Express to open the files and modify the plug-in code.

Comment by MARIO VERGARA on June 24, 2011 at 7:39am

Dear Nathan:

Thanks for your post, i just downloaded the files.

I copied the assembly file on the grasshopper folder, as any other add on

But what about source code?

How are those files installed?

I cannot make it work

Thanks again






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