How to get DPI Scale during DynamicDraw?

Scripting
1

I would like to get the factor, used to scale the text size (Draw2dText) and positions. For example text in the code below.

from Rhino import *
from Rhino.DocObjects import *
from Rhino.Geometry import *
from Rhino.Commands import *
from Rhino.Input.Custom import *
from System.Drawing import Color

def RunCommand():
  gp = GetDrawStringPoint()
  gp.SetCommandPrompt("Point")
  gp.Get()
  return gp.CommandResult()

class GetDrawStringPoint(GetPoint):
  def OnDynamicDraw(self, e):
    xform = e.Viewport.GetTransform(
      CoordinateSystem.World, CoordinateSystem.Screen)    

    current_point = e.CurrentPoint
    current_point.Transform(xform)
    screen_point = Point2d(current_point.X, current_point.Y)

    msg = "screen {0}, {1}".format(screen_point.X, screen_point.Y)
    e.Display.Draw2dText(msg, Color.Blue, screen_point, False)

if __name__ == "__main__":
  RunCommand()
2

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

3

Yes, that did the trick.

dpi = e.Display.DpiScale

DrawEventArgs.Display for anyone searching through the RhinoCommon API for more information.

Thank you @nathanletwory

4

You’re welcome.

5

How to get DPI scaling in non-Dynamic Draw

6

Is it the same way to get the DPI scale in Rhino 8? Assuming I’m working with python.

7

Yes.

import Rhino
import scriptcontext as sc

view = sc.doc.Views.ActiveView
if view:
    print(view.DisplayPipeline.DpiScale)

– Dale