[vtkusers] vtkStreamTracer does not fill area

[Jim Shain]

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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