How can I reading object names?

Replies to This Discussion

Permalink Reply by David Rutten on January 12, 2010 at 4:17pm

Hi Rafi,

object names are stored in the ObjectAttributes (alongside Layer, Grouping, Linetype etc.) and they are completely ignored by Grasshopper. The only way to extract the Object name, is to feed the object into a GUID parameter, then feed the Guid into a Script component, access the rhino document, locate the object, get the attributes and have a look inside with a VB or C# script.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Rafi on January 13, 2010 at 10:51am

Thanks David

I am not very familiar with the code! Can you possibly give some clues about this, or perhaps an example?

Permalink Reply by Rafi on January 21, 2010 at 9:57am

Can someone help me?

I have no idea how such a VB script should look like and I need urgently a prior notices.

Permalink Reply by David Rutten on January 21, 2010 at 10:24am

Something like this (just writing it from the top of my head):

Dim obj_ref As New MRhinoObjRef(obj_id)
If (obj_ref Is Nothing) Then Return

A = obj_ref.Object().Attributes().m_name


--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by David Rutten on July 31, 2011 at 5:04am

This is VB.NET accessing the old Rhino SDK. These days Grasshopper uses the new Rhino SDK.Now this code would look like:

 

Dim obj_ref As New DocObjects.ObjRef(obj_id)

If (obj_ref.Object() Is Nothing) Then Return

A = obj_ref.Object().Attributes().Name

 

There are a lot of books on learning VB.NET, and a lot of web resources. There's not a lot of documentation on learning our SDK. We have documentation explaining what most classes and functions do, sometimes even with example code, but nothing didactic.

 

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Firat Aydin on August 1, 2011 at 11:56pm

the code i put down is  always giving compile errors. can you send me a script that reads names of breps?

Permalink Reply by Rafi on January 21, 2010 at 11:49am

Thanks David,
I tried my best but without success!
Maybe you can give me a hint.

Attachments:

• READING_OBJECT_NAMES.ghx, 86 KB

Permalink Reply by David Rutten on January 21, 2010 at 12:13pm

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Filipe Brandão on December 13, 2016 at 3:37am

I tried to replicate your script but I'm getting the following error:

1. Error (CS0246): Não foi possível localizar o nome do tipo ou do espaço de nomes 'MRhinoObjRef' (está a faltar uma directiva using ou uma referência à assemblagem?) (line 72)

(rough translation)

1. Error (CS0246): It wasn't possible to locate the name of the type or of the namespace 'MRhinoObjRef' (a directive using or a reference to the assemblage is missing?) (line 72)

What am I doing wrong?

Permalink Reply by David Rutten on December 13, 2016 at 4:48am

This is very old code using a previous version of the Rhino .NET SDK. We're using RhinoCommon these days which requires a different approach.

Permalink Reply by David Rutten on December 13, 2016 at 4:53am

Without testing, I guess the current code would look like:

private void RunScript(Guid id, ref object A)

{

  ObjRef objRef = new ObjRef(id);

  if (objRef.Object() != null)

    A = objRef.Object().Attributes.Name;

  else

    A = "id does not refer to a loaded Rhino object";

}

Note that you'll have to set the type hint for the input to Guid from within the input context menu.

Permalink Reply by Filipe Brandão on December 13, 2016 at 7:35am

Thanks David! It worked perfectly!

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