[vtkusers] very slow rendering of stream geometry

[Wylie, Brian]

Mike,

Try adding this option to you mapper...

sph_map->ImmediateModeRenderingOn();


For some reason display lists may not be working on your hardware. Also
anytime you have any issue with VTK you should always list out your
hardware, OS, compiler... Some of these things can have platform
dependencies...

Another thing is that updating your video drivers can be helpful (if you
haven't already done that.. )

  Brian Wylie - Org 1424
  Sandia National Laboratories
  MS 0822 - Building 880/A1-J
  (505)844-2238 FAX(505)845-0833    
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> -----Original Message-----
> From: vtkusers-bounces+bnwylie=sandia.gov at vtk.org 
> [mailto:vtkusers-bounces+bnwylie=sandia.gov at vtk.org] On 
> Behalf Of Mykhaylo Kostandov
> Sent: Friday, March 16, 2007 9:50 PM
> To: vtkusers at vtk.org
> Subject: [vtkusers] very slow rendering of stream geometry
> 
> Greetings all,
> 
> I am experiencing some problems displaying flow fields with 
> streamlines filtered with tubes or glyphs or pretty much any 
> other filter. The dimensions of velocity field datasets I'm 
> dealing with are 40x40x40, and all I'm trying to do right now 
> is to seed the streamlines with a vtkPointSource and apply 
> the vtkTubeFilter. As for streamlines, it seems that the only 
> way to get them to show up is to drastically reduce the 
> number of seeding points and increase the integration step 
> length; otherwise, the system just can't handle it. Once I 
> apply the vtkTubeFilter, it's virtually impossible to get it 
> to work unless there are only a few seeds left, and the 
> integration step is very high (see below).
> 
> The processing itself doesn't take too long, but entering the 
> render takes literally forever (and either segfaults or hangs).
> 
> In ParaView, however, everything works fine with much greater 
> propagation times and number of seeds, as well as with 
> reasonable integration step lengths.
> 
> I tried reducing the poly complexity with vtkStripper, etc. 
> but it didn't help.
> 
> Any help would be greatly appreciated. Thank you all very much!
> 
> -Mike
> 
> Here's a snippet:
> 
>     vtkDataSetReader *dataset = vtkDataSetReader::New();
> 
>     dataset->SetFileName("vortex5-0010.vtk");
> 
>     vtkPointSource *seeds = vtkPointSource::New();
>     seeds->SetRadius(5);
>     seeds->SetCenter(19.5,19.5,19.5);
>     seeds->SetNumberOfPoints(10);
> 
>     vtkRungeKutta4 *sph_rk4 = vtkRungeKutta4::New();
>     vtkStreamLine *sph_stream = vtkStreamLine::New();
>    
>     sph_stream->SetInput(dataset->GetOutput());
>     sph_stream->SetSource(seeds->GetOutput());
>     
>     sph_stream->SetMaximumPropagationTime(123000);
>     sph_stream->SetIntegrationStepLength(1); // .5
>     sph_stream->SetStepLength(2); // .1
>     
>     sph_stream->SetNumberOfThreads(1);
>     sph_stream->SetIntegrationDirectionToIntegrateBothDirections();
>     sph_stream->SetIntegrator(sph_rk4);
>     sph_stream->SpeedScalarsOn();
>     sph_stream->Update();
>   
>      vtkTubeFilter *tubes;
>     
>      tubes = vtkTubeFilter::New();
>      tubes->SetInput(sph_stream->GetOutput());
>      tubes->SetRadius(0.2);
>      tubes->SetNumberOfSides(6);
> 
>      vtkPolyDataMapper *sph_map = vtkPolyDataMapper::New();
>  
>      sph_map->SetInput(tubes->GetOutput());
> 
>     vtkActor *sph_actor = vtkActor::New();
>     sph_actor->SetMapper(sph_map);
> 
> 
> 
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