can't interact with show and mouse

[cyrenaique]

Hello,
Very nice job, I am struggling with interacting with 3d window (on windows, python)
I tried :
vp = Plotter(bg='black')

show both Volume and Mesh

vp.show(vol1,vol2,interactive=0)
vp.interactor.Render()
vp.interactor.Start()

and onmy show with interactive=True but everytime I click in the window it's closing....
I guess I missed something
Best,
Arnaud

[marcomusy]

Hi Arnaud,
thanks for your interest, can you reproduce this minimal example:

from vtkplotter import *

vol1 = load(datadir+'embryo.tif').scale(0.05)
vol2 = load(datadir+'embryo.slc')

show(vol1, vol2, bg='black', axes=1)

[cyrenaique]

Thanks for the quick answer,
I do see volumes but can not rotate or move anything, the window just close.
Best,

[marcomusy]

Is is only related to volumes or it's the same with meshes?

from vtkplotter import *

vol1 = load(datadir+'embryo.tif').scale(0.05)
sph = Sphere()

show(vol1, sph)

Or, can you run this?
https://lorensen.github.io/VTKExamples/site/Python/GeometricObjects/Cone/

[cyrenaique]

the vtk runs and works well, trying to find embryo.tif now...

[cyrenaique]

ok I didn't install the examples, doing it now

[cyrenaique]

doesn' work with examples, same behaviour, the window closed as soon as I try to interact with it

[cyrenaique]

Sorry, I can't help u, I don't have any log or debug info, running on dell laptop, python 3.7 ,nvidia gtx1050 +intel gpu, vtk visualisation works and interact well, but show() renders but no interaction with mouse, keyboard ok for what I succeeded to test

[marcomusy]

OK, thanks for reporting this, I'll give it a try on a windows system to see if i can reproduce the issue!

[RubendeBruin]

Which VTK version are you using?

[marcomusy]

...also, what happens if you add:

# Allow to interact with scene during interactor.Start() execution
settings.allowInteraction = False

[RubendeBruin]

I can not reproduce the issue on Windows 10 with vtk 8.2.0

Some of the keys presses do cause the renderer to crash, but that is a known problem of vtk and has been solved on the master branch of vtk.

[cyrenaique]

settings.allowInteraction = False, doesn't change anything, I use vtk 8.1.0, I will try to update to vtk 8.2

[cyrenaique]

I have vtk 8.1.2 actually

[cyrenaique]

is it correct ?

win32OpenGL?

[cyrenaique]

Also, in Scripts I have vtkplotter not vtkplotter.exe when I modify the name and run it:
This version of Anaconda3\Scripts\vtkplotter.exe is not compatible with the version of Windows you're running.
Compatibily mode doesn' change anything.
version installed : Successfully installed vtkplotter-2020.2.1
strange...

[marcomusy]

• On windows it looks like that the window title is ignored..

• you should not change vtkplotter to vtkplotter.exe because the file is a python script, you should rather run it with command python vtkplotter

Does this work for you?

import vtk
from vtkplotter import load, datadir

vol = load(datadir+'embryo.tif')

ren = vtk.vtkRenderer()
ren.AddActor(vol)

renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)

iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
iren.Initialize()
iren.Start()

[cyrenaique]

This one works well, my bad for vtkplotter, vtkplotter is working well also. only problem with show....

[marcomusy]

OK. Next step:

from vtkplotter import load, datadir, Plotter

vol = load(datadir+'embryo.tif')

vp = Plotter()

ren = vp.renderer
iren = vp.interactor

ren.AddActor(vol)

iren.Initialize()
iren.Start()

[cyrenaique]

this one crash

[cyrenaique]

show(datadir+'embryo.tif'), this also crash

[marcomusy]

OK, but does it render an image? Any crashing message?

Next:

import vtk
from vtkplotter import load, datadir, Plotter, settings

settings.allowInteraction=False # try both

vol = load(datadir+'embryo.tif')

vp = Plotter()

ren = vp.renderer
iren = vp.interactor
renWin = vp.window

ren.AddActor(vol)

iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
iren.Initialize()
iren.Start()

[cyrenaique]

they all render images, no message, and this last one works (rendering, interact). when I say crash its for interaction

[cyrenaique]

True and False are working

[marcomusy]

next:

import vtk
from vtkplotter import load, datadir, Plotter, settings, Sphere

settings.allowInteraction=False

sph = Sphere().lw(0.1)

vp = Plotter()

ren = vp.renderer
ren.AddActor(sph)

iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(vp.window)

iren.AddObserver("LeftButtonPressEvent", vp._mouseleft)
iren.AddObserver("RightButtonPressEvent", vp._mouseright)
iren.AddObserver("MiddleButtonPressEvent", vp._mousemiddle)
iren.AddObserver("KeyPressEvent", vp._keypress)

vsty = vtk.vtkInteractorStyleTrackballCamera()
iren.SetInteractorStyle(vsty)
iren.Initialize()
iren.Start()

try interact, press h

[cyrenaique]

works, h gives the help

[cyrenaique]

STOP!! import vtk
from vtkplotter import load, datadir, Plotter, settings, Sphere,show

settings.allowInteraction=False

sph = Sphere().lw(0.1)
show(sph)

this works....

[marcomusy]

..and the Volume can also be visualized and interacted with?

[cyrenaique]

Yes, but any datadir volume crash...:
from vtkplotter import load, datadir, settings, Sphere,show

settings.allowInteraction=True
vol1 = load(datadir+'embryo.tif').scale(0.05)

sph = Sphere().lw(0.1)

show(vol1)

crash, sphere is working well

[cyrenaique]

True or False doesn't change anything

[marcomusy]

Ok, this points to a gpu problem, the show() seems unrelated.
Try

from vtkplotter import datadir, settings, Sphere, Volume, show
from vtkplotter.vtkio import loadImageData

settings.allowInteraction=True

img = loadImageData(datadir+'embryo.tif') # loads a vtkImageData obj

# mapper types are: gpu, opengl_gpu, smart, fixed, tetra, unstr
vol = Volume(img, mapperType='smart') 

show(vol)

[cyrenaique]

crash, I am not sure which gpu card I am using with python, with vtk sure it uses the nvidia geforce, maybe show uses the intel for any reasons

[cyrenaique]

I was right, I force python to use geforce and it works now... so sorry for these troubles:

[cyrenaique]

And huge thanks to you for your help, hope it can help others

[cyrenaique]

Fixed in less than 24h :)
23h33minutes

[marcomusy]

Indeed it should not crash with 'smart' mapper type... anyway,
thanks for your patience in testing and debugging the issue

[cyrenaique]

well, that was in my interest :)