GrasshopperAsyncComponent

Less Janky Grasshopper Components

See the companion blog post about the rationale behind this approach. This repo demonstrates how to create an eager and responsive async component that does not block the Grasshopper UI thread while doing heavy work in the background, reports on progress and - theoretically - makes your life easier.

We're not so sure about the last part! We've put this repo out in the hope that others will find something useful inside - even just inspiration for the approach.

Looks nice, doesn't it? Notice that the solution runs "eagerly" - every time the input changes, the the computation restarts and cancels any previous tasks that are still running. Once everything is done calculating, the results are set. And the best parts:

• Grasshopper and Rhino are still responsive!
• There's progress reporting! (personally I hate waiting for Gh to unfreeze...).

Approach

Provides an abstract GH_AsyncComponent which you can inherit from to scaffold your own async component. There's more info in the blogpost on how to go about it.

Even better, there's a sample component that shows how an implementation could look like!

Current limitations

Main current limitation is around data matching. If the component needs to run more than once - e.g., in the case of Item input parameters receiving a List of objects, it gets stuck in a loop. Currently, the safest bet - albeit not the easiest one - is to make sure your input parameters are set to Tree and you can do your own data matching inside. Not ideal, I know. I'm sure this can be improved, but it's late on a Sunday evening.

Given the fact that the responsibility to check for task cancellation is up to the developer, this approach won't be too well suited for components calling code from other libraries that you don't, or can't, manage.

Debugging

Quite easy:

• Clone this repository and open up the solution in Visual Studio.
• Once you've built it, add the bin folder to the Grasshopper Developer Settings (type GrasshopperDeveloperSettings in the Rhino command line) and open up Grasshopper.
• You should see a new component popping up under "Samples > Async" in the ribbon.
• A simple

Contributing

Before embarking on submitting a patch, please make sure you read:

• Contribution Guidelines,
• Code of Conduct

License

Unless otherwise described, the code in this repository is licensed under the Apache-2.0 license.