How to get the gumball location?

Rhino Developer
1

How can I get the gumball center in RhinoCommon? I just want to put a point there.

2

It is most likely the centroid of the bounding box of your geometry (or set of geometries).

Boundingbox (and its centroid) will change regarding the CPlane … the same as with the gumball.

3 
import Rhino
import scriptcontext

def ExtractGumballOrigin():
    go = Rhino.Input.Custom.GetObject()
    go.SetCommandPrompt("Select object")
    go.Get()
    if go.CommandResult()!= Rhino.Commands.Result.Success:
        return go.CommandResult()
    rhobj = go.Object(0).Object()
    success, frame = rhobj.TryGetGumballFrame()
    if not success:
        return Rhino.Commands.Result.Failure
    scriptcontext.doc.Objects.AddPoint(frame.Plane.Origin)
    return Rhino.Commands.Result.Success

if __name__ == "__main__":
    ExtractGumballOrigin()
4

Hi @phcreates,

There is this:

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

– Dale

1 Like
5

That fails in all cases I’ve tried.

6

Thanks, but I’m still fairly clueless in RhinoCommon and so I have no idea where to go from there. I see these help files but they don’t help me at all because I don’t understand the format. Sometimes I can muddle through when I find examples that are similar enough, but mostly I’m just lost.

7

I guess, but how can I select control points?

8

:sweat_smile: … what are you trying to do?

9

I’m literally trying to put a point where the center of the gumball is, in any normal case. Gumball position is affected by control points, surfaces - nearly anything - and I find that I want to just have a point there when I’m building things sometimes. But I’m going to hold off on this for now - I just thought it might be simple.

10

it only works when the gumball is not in its default position:
Gumball

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