[vtkusers] Using QVTKWidget with QT5 on Linux

[Pavel Kalinnikov]

I tried to make all steps of "VTK calls" section, but it doesn't help. Do I
really need depth peeling? The scene doesn't have any translucency, just an
opaque sphere and a pyramid.

Besides, if I replace QVTKWidget by QVTKWidget, everything works just fine.

2015-05-08 6:55 GMT+03:00 Sankhesh Jhaveri <sankhesh.jhaveri at kitware.com>:

> Yep. It seems like depth peeling is OFF. You will have to turn depth
> peeling ON explicitly on the VTK render window.
>
> http://www.vtk.org/Wiki/VTK/Depth_Peeling
>
>
>
>
> Warm Regards,
>
> Sankhesh Jhaveri
> Research & Development Engineer
> Kitware, Inc.
> *Phone*: (518) 881 4417
> *Fax*: (518) 371 4573
>
>
>
> On Wed, May 6, 2015 at 4:57 PM, Pavel Kalinnikov <
> pavelkalinnikov at gmail.com> wrote:
>
>> Here is the screenshot of working example from Examples/GUI/Qt/Events.
>>
>> One more thing I forgot to say - VTK works good on my Linux (when not
>> using QVTKWidget).
>>
>> 2015-05-06 23:45 GMT+03:00 David E DeMarle <dave.demarle at kitware.com>:
>>
>>> If you can share the right/wrong images, that would help diagnose the
>>> cause.
>>>
>>> Is there opacity in the scene? If so depth peeling is needed to render
>>> the faces in the right order. To do depth peeling we need to ask the GPU
>>> what it can do and that can get messed up with different paths to the
>>> graphics context layers (under Qt vs natively for example.)
>>>
>>>
>>>
>>>
>>> David E DeMarle
>>> Kitware, Inc.
>>> R&D Engineer
>>> 21 Corporate Drive
>>> Clifton Park, NY 12065-8662
>>> Phone: 518-881-4909
>>>
>>> On Wed, May 6, 2015 at 4:31 PM, Pavel Kalinnikov <
>>> pavelkalinnikov at gmail.com> wrote:
>>>
>>>> Hi everyone!
>>>>
>>>> I have the following environment:
>>>>  * OS - x64 Ubuntu 12.04.5 LTS
>>>>  * Qt 5.4
>>>>  * VTK 6.2.0
>>>>
>>>> I'm trying to use QVTKWidget and it seems like it doesn't work
>>>> properly. When I try to render some 3d object in this widget, I see that
>>>> faces get rendered in a wrong order (maybe there are some problems with
>>>> z-buffer or something).
>>>> The same code built on Windows works perfectly.
>>>>
>>>> Also I tried to build and run the standard example
>>>> Examples/GUI/Qt/Events distributed along with VTK-6.2.0, and it has the
>>>> same problem in my Linux environment. And again, it works on Windows.
>>>>
>>>> Am I doing something wrong or is it a bug?
>>>> Is there anyone who can fix this?
>>>> Is there any known workaround for this case?
>>>>
>>>> Thank you,
>>>> Pavel Kalinnikov
>>>>
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>>>
>>
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>>
>> Visit other Kitware open-source projects at
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>>
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