[vtkusers] vtkStreamTracer does not fill area

[Berk Geveci]

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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