Finding GUIDs in python

Replies to This Discussion

Permalink Reply by Giulio Piacentino on June 21, 2012 at 9:55am

It is not possible to know this. Grasshopper works with pure geometry, and often it does not keep track of where it came from (if it was a line from the document or it is just a connection of two points, for example).

So my suggestion would be to:

1. Upgrade to the latest GhPython

2. Use the Guid component in Grasshopper to link to the Guid's of objects

3. Input the Guid into GhPython. Convert the Guid into a string if you want the Guid as text in the outputs.

I hope this helps,

- Giulio

__________________
giulio@mcneel.com

Attachments:

• guid.gh, 2 KB

Permalink Reply by jon kontuly on June 21, 2012 at 12:01pm

Thanks Giulio,

This does help but when I add

name = rs.BlockInstanceName(a)

I get an error "unable to find instance object." I wanted to use the GUID to get the block name so I could use rs.InsertBlock(name, [5,5,5])

I assume this has to do what you said in my previous post that Grasshopper does not have access to the object information that exists in the Rhino document.

Is there away around this or should I abandon doing this in Grasshopper and just write the code in the Rhino document?

Thanks.

Jon

Permalink Reply by Giulio Piacentino on June 22, 2012 at 8:00am

Hi again Jon

getting the ID from the geometry is not a standard operation, but you can work around this by keeping track of the ID and then move around the geometry from the Rhino document into Grasshopper.

Here is an example,
I hope it helps,

- Giulio
________________
giulio@mcneel.com

Attachments:

• block-geometry.gh, 2 KB

Permalink Reply by jon kontuly on June 22, 2012 at 8:13am

Thanks Giulio,

I am starting to get the feeling that since I don't "need" the functionality of grasshopper I would be better off just writing a python script in the Rhino environment. I appreciate the help though. Also, it has helped me understand how the two environments interact. very interesting.

jon