Adding a logo-widget

Is there an easy way in vedo to add a logo-widget? Something in line with addIcon, but then creating a static image instead of one that rotates?

logo_rep = vtk.vtkLogoRepresentation()
logo_rep.SetImage(self._colorbar.GetInput())
logo_rep.SetPosition([0.1, 0.5])
logo_rep.SetImageProperty(logo_rep.GetImageProperty())

logowidget = vtk.vtkLogoWidget()
logowidget.SetInteractor(self.screen.interactor)
logowidget.SetRepresentation(logo_rep)
logowidget.On()
logowidget.Render()

plotter.widgets.append(logowidget)

if not, would a PR with addLogo be welcome?

[RubendeBruin]

I also can not disable user control of the widget. According to the docs SelectableOff() and ResizableOff() should stop user interaction, but I’m still able to move and resize it.

Alternatively an Actor2D with vtkImageMapper can be used, but also here I do not get how to resize the image. Also positioning is in screen coordinates (pixels) rather than view coordinates. Even though the documentation states that is view coordinates…

import vtk
from vedo import *

s = Sphere()
logpic = Picture("https://user-images.githubusercontent.com/32848391/110343974-530a4e00-802d-11eb-88c0-129753028ff9.png")
# logpic = Picture("https://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Visualization_Toolkit_logo.svg/1200px-Visualization_Toolkit_logo.svg.png")

plotter = Plotter()

imagemapper = vtk.vtkImageMapper()
imagemapper.SetInputData(logpic._data)
imagemapper.SetColorWindow(255)
imagemapper.SetColorLevel(127.5)


image = vtk.vtkActor2D()
image.SetMapper(imagemapper)
image.SetWidth(20)  # does not seem to do anything
image.SetHeight(0.01)  # does not seem to do anything
# image.SetDisplayPosition(200,200)  # position in screen coordinates, not view coordinates
image.SetPosition(100,100)  # same same

plotter.add(image)

plotter.show(s, axes=1)

will ask on the vtk forum before continuing.

(In my case I wanted to have my image in a fixed size on the bottom left, which fortunately is a case that works 😃 )

[marcomusy]

yes… very confusing! 😦 moreover the actor2d aspect ratio is not maintained when resizing the window manually