Has anyone tried multi-threading here??

Is multi-threading even possible in Grasshopper?

Replies to This Discussion

Permalink Reply by Damien Alomar on May 7, 2011 at 12:48pm

None of the Rhino SDKs are threadsafe, so there really isn't any use in trying multithread them as you'll just run into a ton of issues. That's not to say that you can't multithread certain operations, but its going to have to be something that doesn't rely on the RhinoSDKs. The only plugin that I know that is multithreaded (other then rendering engines) is RhinoTerrain and the component of the software that is dealing with all the threads is separate from Rhino. Coding something like this is also far beyond a scripting component and probably something that would be best handled within a custom component.

Permalink Reply by Steve Baer on May 7, 2011 at 1:19pm

Not entirely true. Most of the geometry operations are threadsafe. Just don't start messing with the RhinoDoc while in threads.

I've been working on multithreaded python scripts lately and may have something to show in the near future.

Permalink Reply by Damien Alomar on May 7, 2011 at 7:58pm

Well, that's certainly a change in things from almost every other time I've asked. It would be expected that all of the Doc ops would require a single thread, but most of the time its the geometry manipulation that's the issue. Definitely looking forward to anything you've got to show.

Permalink Reply by Daniel Piker on May 7, 2011 at 2:43pm

http://www.nzarchitecture.com/blog/index.php/2011/05/07/threading-g...

Permalink Reply by Damien Alomar on May 7, 2011 at 7:57pm

Awesome...

Permalink Reply by eric brown on May 9, 2011 at 11:51am

Just what I was looking for. THX.

Permalink Reply by robert cervellione on May 7, 2011 at 6:21pm

also you may want to check out the Parallel library in .net 3.5 or 4.0. they allow you to do simple for and foreach loops without the need for thread managment.

the part i find difficult is making everything synchronous because current easy methods for multi threading are not. meaning that that the result will be out of order which for a lot of things it is important to maintain order.

Permalink Reply by Steve Baer on June 1, 2011 at 1:56pm

Here's a python sample that uses the Parallel library that Robert mentioned.

http://python.rhino3d.com/entries/607-Multithreaded-Python

You're going to want to have at least the May 31st, 2011 WIP of Rhino 5 to test.

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