[help] script in GhPython node doesn't work

I'm trying the GhPython node in Rhino 5 with the following simple code:

import rhinoscriptsyntax as rs
vec1 = rs.GetObject('pick a pt', 0)
vec1 = rs.VectorScale(vec1, 0.5)

However, i got the following error message in the Grasshopper Python Script Editor:

Runtime error (NotImplementedException): The method or operation is not implemented.
Traceback:
line 287, in GetObjects, "C:\Users\oat\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\selection.py"
line 3, in script

can anybody kindly advise what's wrong here?

Thanks!

Replies to This Discussion

Permalink Reply by Giulio Piacentino on January 31, 2012 at 11:03am

Attachments:

picking.gh, 3 KB

Permalink Reply by Grasshope on February 1, 2012 at 8:17am

Hi, Giulio, thank you very much for the clarification! I guess the GhPython node is different from the native Python Editor in Rhino 5 anyway.

Permalink Reply by Giulio Piacentino on February 1, 2012 at 9:44am

Yes -- it is slightly different (mostly on the user interface and selection part). The rhinoscriptsyntax geometry methods are working in the same way.
- Giulio
_______________
giulio@mcneel.com

Permalink Reply by Cochin baptiste on November 14, 2014 at 9:42am

Hi Giulio,

I am trying to implement the same as you did in your example, but your GH file doesn't work anymore. I got the same message as Grasshope had at the beginning of this post.

Was there any change with the upgrades?

Thanks

Baptiste

Permalink Reply by djordje on November 14, 2014 at 10:03am

Hi Cochin.

The upper message can differently be interpreted depending on the function used, or the "point" of the code.
Can you attach your .gh (and .3dm if needed) files please?

Permalink Reply by Giulio Piacentino on November 14, 2014 at 10:53am

Hi Cochin

yes, the change is that there is no more user interface (UI) to switch the target document of RhinoScript methods. So you have to do this manually in the script.

The reason behind this is that you should as much as possible not use getObject/picking methods in Grasshopper, but use the normal Grasshopper UI.

I hope this explains it,

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Attachments:

picking2.gh, 11 KB

Permalink Reply by Cochin baptiste on November 17, 2014 at 4:09am

Hi Giulio,

This is what I need. Thank you.

What is the exact purpose of the last code line :

sc.doc = ghdoc ?

Permalink Reply by Giulio Piacentino on November 17, 2014 at 4:41am

>> to switch the target document of RhinoScript methods.

Most RhinoScript methods have a call looking like AddXXX(), or RemoveZZZ(). This implicitly targets a document. The document can be the one in Rhino, or a replacement without Undo's that is used to speed up things in Grasshopper. You should usually not need to know about this, except in corner cases like with UI, picking, and similar.

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by Cochin baptiste on November 17, 2014 at 6:16am

Understood, Thank you for explanations.

Permalink Reply by Jack Zeng on November 17, 2014 at 9:25pm

Hi Giulio,

If we want to get other geometries like curves how should we change the code?

I have tried to get curves but cannot get it from the output of GhPython. It returns a Null item...

Any suggestion?

Cheers,

Jack

Permalink Reply by Giulio Piacentino on November 18, 2014 at 4:48am

Hi Jack

May I be very frank... why do you want this?
What problem are you trying to solve?

In general, you will have to get the geometry from the document, and copy it in order to have it in Grasshopper. With a point, this works without copying because they are structs and are automatically copied.

Thanks,

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by Jack Zeng on November 19, 2014 at 12:19am

Hi Ciulio,

I am just wondering the possibility.

I didn't know it can GetObject (for point) before I see this thread.

So I would wonder if it is possible to also get other objects.

Thinking if it works then it would be much easier to move the python script from rhino to the GhPython.

Thanks,

Jack