Get GUID from Rhino.Geometry.NurbsCurve programmatically

Scripting
1

I feel like this is an immensely stupid question, but I’m simply not able to get it done. I need to delete an object from the scene, and Rhino.RhinoDoc.ActiveDoc.Objects.Delete only accepts a GUID, not a RhinoCommon object. However, I simply cannot find anywhere how I am supposed to obtain the GUID from a RhinoCommon object. It has to be incredibly easy, but I simply can’t get it done.

2

If you have a grip on a Rhino object, have you tried to read the Id property?

https://developer.rhino3d.com/api/RhinoCommon/html/P_Rhino_DocObjects_RhinoObject_Id.htm

// Rolf

3

How exactly would I grip my object?

Rhino.DocObjects.GripObject(curve) Doesn’t work

4

Ah I get it now! I made a mistake in my variable assignments, which meant that a not-yet-made RhinoCommon object shared it’s variable name with a GUID object in the scene. This is the reason I wasn’t able to remove it and also why it gave me the RhinoObject not a GUID error. Your link gave me the insight I needed, because it told me that object obtain a guid once added to the scene. Which is incredibly obvious, because it wouldn’t be a GUID if it wasn’t visible in the GUI

I’m still new to this :sweat_smile:

5

The following example should help you out when you don’t have a reference to the object yet:

The samples pages is gold :slight_smile:

// Rolf

6

I’ll make sure to add this to my reference, I’ve mostly been searching both API’s

7

Yep, as you found out, you don’t actually need to delete anything that has not been added to the document, as it is just a virtual construction in memory. If you don’t do anything with it, the memory it takes up is simply reclaimed by the “garbage collector” after the script ends.

9

I’ve got somehow similar problem.
I used GetObject.GetMultiple() to get a list of references to curves in my document.

obraz
obraz847×495 57.1 KB

Now i’m iterating through this list and I would like to get GUID of my curves. I thougt that i will have an acces to ID property by I don’t.

obraz
obraz930×220 16.2 KB

If i have Rhino.Geometry.Curve object that already exist in the document how to access it GUID ?

10

Hi @kubadrozdowski,

Curve do not have ids, or GUIDS. If you need the ids, then maintain a list of Rhino objects.

var CurveObjectList = new List<CurveObject>();
foreach (ObjRef objref in gc.Objects())
{
  if (objref.Object() is CurveObject obj)
    CurveObjectList.Add(obj);
}

– Dale

11

Thank you @dale :slight_smile: