[vtkusers] Execute filter asynchronous

[Jan Linxweiler]

Hi David,

thank you for your answer.

What you describe is exactly the way I handle it now. The Problem is, that the execution of the pipeline make the whole UI extremely unresponsive in case of large data. Cuts are ok, but streamlines and isosurfaces make problems. No chance of dealing with them asynchronously. 

What about vtkMultiProcessController in combination with vtkThreadedController or vtkThreadedStreamingPipeline? That's what I found with a quick google search. Could those in principle solve my problem although requiring mayor rework?

Thank you,

Jan
  
On 26.11.2010, at 16:44, David Gobbi wrote:

> Hi Jan,
> 
> Separate pipelines can execute in separate threads.   But you cannot execute different portions of the same pipeline in different threads.  And in general, a mapper cannot be executed independent of its actor.
> 
> So what you want is to have your simulation code (without the rendering part of the pipeline) running in one thread, and then have a way of copying the resulting data over to the UI thread whenever you want to render it.  I don't have any example code, but I know that people have done things like this with VTK.
> 
>   David
> 
> 
> On Fri, Nov 26, 2010 at 6:04 AM, Jan Linxweiler <linxweil at irmb.tu-bs.de> wrote:
> Hello all,
> 
> Is it possible to run the visualization (execute filters and and maybe mappers) asychronous from the rendering thread?
> 
> I've got a simulation that is producing results in a separate thread. Those are presented in the UI thread. I'd like to execute (long running) visualizations in the simulation thread and then do the final rendering (of the actors) in the UI thread. Is this possible and when can you point me to an example code or give be a hint to google for?
> 
> Thank you for your help,
> 
> Jan
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