[vtkusers] VTK in a multi-threaded program

[Richard Whitehead]

Aashish,
I did try writing my own thread-safe smart pointer, but because VTK uses
the non thread-safe version internally it doesn't really help.
Many thanks,
Richard


On 24 March 2014 14:32, Aashish Chaudhary <aashish.chaudhary at kitware.com>wrote:

> Hi Richard,
>
> On Mon, Mar 24, 2014 at 10:25 AM, Richard Whitehead <
> richard.whitehead at vivosight.com> wrote:
>
>> David,
>> Unfortunately I am now in a really bad place.  I have some long-winded
>> calculations to do and then visualise, which I want to do in a background
>> thread.  This is for a commercial application and hanging the GUI is
>> completely unacceptable.  I have now invested several man-months into VTK
>> and I have to decide whether to drop it.  I think the only sensible thing I
>> can do is to get rid of VTK from my calculations and only use it for
>> visualisation.
>>
>
> FYI, we have successfully used VTK in a multi-threaded environment for our
> VisGUI application framework (http://www.kitware.com/source/home/post/84)
> specifically dealing with computations. Rendering was done single threaded
> though. The trick involved writing our own thread safe version of
> vtkSmartPointer (I believe you are doing something similar).
>
> - Aashish
>
>
>
>>  Many thanks,
>> Richard
>>
>>
>>
>> On 24 March 2014 12:29, David Cole <dlrdave at aol.com> wrote:
>>
>>> You are definitely not going crazy. The really, really rather foul
>>> thing, that frustrates me all the time, is when I must do some VTK
>>> operation which takes significant time (on the order of seconds or minutes,
>>> rather than the typical fraction of a second) ... and then it makes the GUI
>>> completely unresponsive until the operation is done.
>>>
>>> I spend rather a lot of my time making sure that everything I do that's
>>> VTK-based is at interactive speeds as much as possible to absolutely
>>> minimize the user pain associated with this.
>>>
>>> Pushing long operations completely into a separate non-GUI thread would
>>> be absolutely fantastic. I look forward to the day when such a thing
>>> becomes possible.
>>>
>>>
>>> :-)
>>> D
>>>
>>>
>>
>>
>> --
>>
>> Richard Whitehead *-* Senior Imaging Engineer
>>
>> *Michelson Diagnostics Ltd*
>>
>> *M:* +44 (0)7905 955276   *T:* +44 (0)20 8308 1695
>>
>> *E: *richard.whitehead at vivosight.com   *W:* www.vivosight.com
>>
>>
>> <http://www.vivosight.com/>
>>
>>
>> Michelson Diagnostics Ltd, 1 Grays Farm Production Village, Grays Farm
>> Road, Orpington, Kent  BR5 3BD, UK
>>
>> Registered Office: 3 Shearwater, Maidstone, ME16 0DW.     Registered in
>> England No. 5732681
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
>>
>
>
> --
> | Aashish Chaudhary
> | R&D Engineer
> | Kitware Inc.
> | www.kitware.com
>



-- 

Richard Whitehead *-* Senior Imaging Engineer

*Michelson Diagnostics Ltd*

*M:* +44 (0)7905 955276   *T:* +44 (0)20 8308 1695

*E: *richard.whitehead at vivosight.com   *W:* www.vivosight.com


<http://www.vivosight.com/>


Michelson Diagnostics Ltd, 1 Grays Farm Production Village, Grays Farm
Road, Orpington, Kent  BR5 3BD, UK

Registered Office: 3 Shearwater, Maidstone, ME16 0DW.     Registered in
England No. 5732681
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20140324/7fc36874/attachment.html>