Cannot set DisplayPipelineAttributes.ShowCurves Property

Scripting
,
1

Hi @dale,

i am trying to enable ShowCurves in the DisplayPipelineAttributes of the current displaymode (Rendered) using below code:

import Rhino
import scriptcontext
import rhinoscriptsyntax as rs

def DisplayModeShowCurves(new_state=True):
    
    dmd = scriptcontext.doc.Views.ActiveView.ActiveViewport.DisplayMode
    dmd.DisplayAttributes.ShowCurves = new_state
    Rhino.Display.DisplayModeDescription.UpdateDisplayMode(dmd)
    scriptcontext.doc.Views.Redraw()

DisplayModeShowCurves(True)

I can see the checkbox in the display tab gets checked, however curves are not shown. If i switch the active view to a different display mode and then back to rendered, curves are displayed. It seems to fail in Rhino 6 and 7. Is there anything wrong with my code ?

thanks,
c.

2

A little clunky, but this should work:

import Rhino
import scriptcontext as sc

def GetShowCurves():
    dm = sc.doc.Views.ActiveView.ActiveViewport.DisplayMode
    return dm.DisplayAttributes.ShowCurves

def SetShowCurves(show):
    view = sc.doc.Views.ActiveView
    active_dm = view.ActiveViewport.DisplayMode
    id = Rhino.Display.DisplayModeDescription.WireframeId
    wireframe_dm = Rhino.Display.DisplayModeDescription.GetDisplayMode(id)
    view.ActiveViewport.DisplayMode = wireframe_dm
    view.Redraw()
    Rhino.RhinoApp.Wait()
    active_dm.DisplayAttributes.ShowCurves = show
    Rhino.Display.DisplayModeDescription.UpdateDisplayMode(active_dm)
    view.ActiveViewport.DisplayMode = active_dm
    view.Redraw()

SetShowCurves(not GetShowCurves())

– Dale

3

Hi @dale,

thanks for the example. I just found that adding a temporary point before the redraw seems to eventually trigger a redraw.

import Rhino
import scriptcontext
import rhinoscriptsyntax as rs

def DisplayModeShowCurves(new_state=True):
    dmd = scriptcontext.doc.Views.ActiveView.ActiveViewport.DisplayMode
    dmd.DisplayAttributes.ShowCurves = new_state
    Rhino.Display.DisplayModeDescription.UpdateDisplayMode(dmd)

    # hack
    pt_id = scriptcontext.doc.Objects.AddPoint(Rhino.Geometry.Point3d.Origin)
    scriptcontext.doc.Objects.Delete(pt_id, True)    

    scriptcontext.doc.Views.Redraw()

DisplayModeShowCurves(True)

There seems to be something wrong with ShowCurves, its happening in every displaymode. Once a user creates some geometry, either by hand or scripted, it updates. :roll_eyes:

_
c.

4

RH-85955 is fixed in Rhino 8 Service Release 17