How to change display line width?

Rhino Developer
1

Hi,
How to change display line width of one object?
I want to change different line width with different objects.
How can I do?

Kind regards,
Vaker

1 Like
2

@Vaker,

not sure which language you use. Below is a python example on how to change the print width for one or more curves. To see the results in the viewport, make sure to enable print display using the _PrintDisplay command before running the script.

import Rhino
import scriptcontext
import rhinoscriptsyntax as rs
    
def ChangePlotWeight(plot_weight=0):
    ids = rs.GetObjects("Select curves", rs.filter.curve, False, True, False)
    if not ids: return
    
    pws = Rhino.DocObjects.ObjectPlotWeightSource.PlotWeightFromObject
    
    for id in ids:
        rh_obj = rs.coercerhinoobject(id, True, True)
        rh_obj.Attributes.PlotWeightSource = pws
        rh_obj.Attributes.PlotWeight = plot_weight
        rh_obj.CommitChanges()
    scriptcontext.doc.Views.Redraw()
    
if __name__=="__main__":
    ChangePlotWeight(plot_weight=2.0)

Note that running the function above without providing the argument plot_weight will reset the plot weight to the default value 0 (hairline). A negative value will set the curve plot weight to “no print”.

c.

3

Hi Vaker,

See if this helps.

cmdSampleObjectPlotWeight

– Dale

4

Hi Dale,

I change plot weight for two lines.
“0.13” for left and “2.0” for right.

Noname.png593Ă—705 19.1 KB

Noname1.png613Ă—749 21.3 KB

but the two lines look like same width.
Why?

Vaker

5

Did you use the PrintDisplay command like Clement said?
You might have to play with the Thickness setting to get the result you would like.

1 Like
6

Hi clement, wim,
Thanks for your help.
It works.

I have another question.
How to open “Print Display Mode” by function without script?

Vaker

7

@Vaker,

you can just script the _PrintDisplay command and enable / disable it via it’s command line options. Eg. in Python RhinoScript this would be:

import rhinoscriptsyntax as rs
rs.Command("_PrintDisplay _State=On")

c.

8

Hi clement,

Thanks for your help.
I know how to using script.
I just want to know way with Rhino API(if or not).

Vaker

9

@Vaker, i guess you need to envoke it using RunConmand. I do not see a PrintDisplay method in RhinoCommon API.

c.

10

There isn’t. I’ve added the wish to the pile.

http://mcneel.myjetbrains.com/youtrack/issue/RH-35496

– Dale

1 Like
11

Hi Dale,

Thanks for your help

Vaker