Rhino3D Grasshopper: Retrieve Domain Value

In Grasshopper you can retrieve a Domain’s positive value with only 1 component.

New to Grasshopper? I suggest you read this article in the first place.

Need more learning resources? Check this out.

Disclaimer

As you will see in my screenshots most components carry a title above them displaying their name. This is because I use a plugin called Bifocals.

Also you’ll see my Grasshopper tab titles abbreviated because there’s not enough horizontal space. I will mention the titles in full in my script though.

As with everything Grasshopper, the technique I show you is no way my own discovery. This time, I got the idea from Michael Pryor in the McNeel forum.

Let’ start

Just today, I faced another of those minor challenges in Grasshopper: How to retrieve a Domain’s value?

Let’s assume you have something like this:

Some minor definition constructing a surface needs to be moved. You connect a Deconstruct Box to the surface output (in this case it’s an Extrude). But then, Deconstruct Box only outputs Domains which your Move component won’t take as an input.

The solution: Connect a Number component (Param – Primitive) to your domain outputs: