Using GH_Structure with generic non-GH objects

Grasshopper Developer
1

Hello,
I am developing a custom component and want to set Data for a Generic output Parameter.
Having data in nested lists, I wanted to use a GH_Structure to maintain the structure. However, my data is not native to GH and thus not an IGH_Goo.
Is there a workaround to use a GH_Structure with generic data ?

2

You can use IGH_Goo to create a wrapper, or directly assign the data.
The difference is when using a wrapper, you can expose certain information from your object that can be seen using a panel.
If you directly assign data, then it will be something like xxxxx class.

1 Like
3

If you have a class for which you can’t or don’t want to implement the IGH_Goo interface, you can just wrap the objects using GH_ObjectWrapper.

This is what GH already does to enable generic objects being passed trough params you define using .AddGenericParameter().

If you want to change how your class gets represented in eg. Panel components , like @xliotx suggested, you can also just override the .ToString() method of your class. GH_ObjectWrapper will call that each time GH needs a string to represent your object instance somewhere in the UI.

1 Like
4

Thanks @ondrej & @xliotx ! I ended up using a GH_ObjectWrapper.
I used it before on receiving Generic objects and casting them into my class types, but didn’t think of using it the other way round. For the moment I can continue moving forward