[vtkusers] Render images in threads other than main thread

[Mathieu Westphal]

Hi Hugh

QVTKOpenGLWidget is currently undergoing a complete redesign, the new
version should be avaible shortly.
In any case you can test it beforehand by compiling  a specific
developement branch of VTK, that can be found here:
https://gitlab.kitware.com/vtk/vtk/merge_requests/3745

Best,


Mathieu Westphal

On Mon, Apr 2, 2018 at 12:31 PM, Todd via vtkusers <vtkusers at vtk.org> wrote:

> Hi Hugh
>
> GUI elements are normally only updated on the main thread, so I suspect
> you need to synchronize your callback from the worker thread. I'm not
> familiar with Qt, but it seems to be documented.
> http://www.informit.com/articles/article.aspx?p=1405551&seqNum=3
>
> Todd
>
>
> On 2 Apr 2018 10:00 p.m., lor fal <lorfalwit at gmail.com> wrote:
>
> Hi all:
>
> I am using QVTKOpenGLWidget to bridge between Qt and Vtk. However, when I
> trying to call vtkRenderWindowInteractor::Render in worker thread, it
> always report error like "makeCurrent() error", which seems something wrong
> while changing OpenGL context. I have googled my questions and found some
> suggestions but none of them could work.
>
> Does anybody know exactly how to render images in worker thread?
>
> Thanks in advance.
>
> --
> Best regards,
> Hugh Lo
>
>
>
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