How can I reading object names?

Hello together,
How can I reading object names of existing objects in model space and following Organize all of them according name?

Example: Line_01; Line_02; Line_03, etc.

Tags: names, object, reading

▶ Reply to This

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

▶ Reply

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?

▶ Reply

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.

▶ Reply

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

▶ Reply

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

▶ Reply

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?

▶ Reply

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

▶ Reply

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

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

▶ Reply

Permalink Reply by Rafi on January 21, 2010 at 1:55pm

Thanks David,
It works fine, but I want to import the object names
to rearrange the objects according the numerical index.
How I can reorganising my list of curves?
Example of imported object names:
0 Curve_3.1
1 Curve_5.1
2 Curve_1.1
3 Curve_4.1
4 Curve_2.1
etc.

▶ Reply

Permalink Reply by David Rutten on January 21, 2010 at 3:23pm

If the sorting works on just strings, it's easy. You create a List of names and call Sort() on it. If your sorting is more complex, you'll have to perform some magic to turn your object names into numbers.

Probably something along the lines of:

//-----------------------------------
int[] index_map = new int[names.Length];
double[] key_map = new double[named.Length];

for (int i = 0; i < names.Length; i++)
{
string trimmed = names[i].Replace("Curve_", string.Empty);
double value = double.Parse(trimmed);

index_map[i] = i;
key_map[i] = value;
}

Array.Sort(key_map, index_map);
//-----------------------------------

Now you'll have two arrays, one contains sorted values, and the index_map contains the sorted indices of the original names array. To now iterate over the sorted names, simply run your indices through the index_map and you're done:

for (int i = 0; i < names.Length; i++)
{
Print(names[index_map[i]]);
}

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