[vtkusers] vtkStreamTracer does not fill area

[Jim Shain]

I've enclosed an image.  

 

The SampleRate is   igrid->SetSampleRate(4, 1, 4);   

 

A smaller SampleRate has more Streamlines but the skip over the pieces is still there (it's just a bit harder to see).  Larger SampleRates obviously have fewer lines but the skip is still there.

 

I do not see how to get the dataset out of vtkStreamTracer (which is streamer down below).   PrintSelf?  Print?  I have tried several different ways and could not get that to work.  How can I do that?

 

Thanks!

 

Jim

 

 


 
> Date: Fri, 16 Oct 2009 08:52:41 -0400
> Subject: Re: [vtkusers] vtkStreamTracer does not fill area
> From: berk.geveci at kitware.com
> To: jimshain at hotmail.com
> CC: vtkusers at vtk.org
> 
> Can you post an example dataset and an image? (or e-mail them to me directly)
> 
> 2009/10/15 Jim Shain <jimshain at hotmail.com>:
> >
> > Hi,
> >
> > When I try to use  vtkStreamTracer the Streamlines do not go all the way to
> > the edge of the object.  It stops a bit short, giving the impression that
> > there are no Streamlines there.   I get the streamer from an vtkExtractGrid
> > (igrid below).  After the Streamline I use a vtkPolyDataMapper (mapper,
> > below) and a vtkActor (called actor down below).  The pp_ below has a list
> > of processor data.
> >
> >  I have looked around quite a bit and cannot find a solution.
> >
> >
> > vtkSmartPointer<vtkExtractGrid> igrid;
> > igrid.TakeReference(vtkExtractGrid::New());
> >
> > igrid->SetInputConnection(pdata_[i]->GetOutputPort());
> > igrid->SetSampleRate(skip+1, 1, skip+1);
> > igrid->IncludeBoundaryOn();
> >
> > // streamer
> > vtkSmartPointer<vtkStreamTracer> streamer;
> > streamer.TakeReference(vtkStreamTracer::New());
> > streamer->SetInputConnection(pdata_[i]->GetOutputPort());
> > streamer->SetSource(igrid->GetOutput());
> > streamer->SetMaximumPropagation(2,pp_->nj(i));
> >
> > streamer->SetMinimumIntegrationStep(2,0.1);
> > streamer->SetMaximumIntegrationStep(2,1.0);
> > streamer->SetInitialIntegrationStep(2, 0.5);
> >
> > streamer->SetIntegratorTypeToRungeKutta45();
> > streamer->SetMaximumError(1.0e-8);
> > streamer->SetIntegrationDirectionToBoth();
> > streamer->ComputeVorticityOff();
> >
> > // mapper
> > vtkSmartPointer<vtkPolyDataMapper> mapper;
> > mapper.TakeReference(vtkPolyDataMapper::New());
> > mapper->SetInputConnection(streamer->GetOutputPort());
> > mapper->ScalarVisibilityOn();
> > mapper->ImmediateModeRenderingOn();
> > mappers_.push_back(mapper);
> > streamline_mappers_.push_back(mapper);
> >
> >
> > // add actor
> > for(int rot=rot_beg;rot<rot_end;++rot)
> > {
> >    double rotate = rot*360.0/nblades;
> >    vtkSmartPointer<vtkActor> actor;
> >    if(!rot)
> >    {
> >       actor.TakeReference(vtkActor::New());
> >       actor->SetMapper(mapper);
> >       actor->RotateZ(rotate);
> >       actor->SetVisibility(0);
> >       ren_->AddActor(actor);
> >    }
> >    streamlines_.push_back(actor);
> > }
> >
> >
> > Thanks!
> >
> > Jim Shain
> >
> >
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