[Paraview] About 2D Glyph orientation

[luc scholtes]

Thank you Eric, but I was probably not as clear as I thought. I have already
seen that a 2D glyphs can be oriented given a defined vector, but, actually,
I was wondering if we can make the 2D plane perpendicular/normal to this
vector, as in the attached picture.

Hope it is clearer now

Regards

  Luc

2010/5/12 Eric E. Monson <emonson at cs.duke.edu>

> Hey Luc,
>
> If I understand you correctly, you want 2D glyphs on your points, but you
> want them oriented according to the normal vectors you've read from your
> file?
>
> If you apply the Glyph filter to your data set, and then choose 2D Glyph
> from the Glyph Type combo-box, then you can set the type of 2d glyphs to
> Circle. If you want them to be oriented by the normals you've calculated,
> then just make sure the Orient check-box is checked, and your normals are
> chosen in the Vectors combo-box. I'll attach an example screen shot of the
> output so you can see if this is what you're looking for. (Note, I've also
> checked Filled to fill in the circles, but this isn't necessary.)
>
> If I'm misunderstanding your question, feel free to rephrase it and we'll
> try again. :)
>
> -Eric
>
> ------------------------------------------------------
> Eric E Monson
> Duke Visualization Technology Group
>
>
>
> On May 12, 2010, at 2:25 AM, luc scholtes wrote:
>
> > Hi all,
> >
> > I am new to Paraview and I could not find any clear information on how 2D
> glyphs are oriented. Is there a way to control their normals to the the 2D
> plane?
> >
> > Here is the code I use to generate a cloud of points from a text file to
> which I would like to assign different filters (it can be 3D or 2D, but
> circles oriented by their normals would be perfect...)
> >
> > /// here is the part to recover the data
> > std::ifstream file ("cracks.txt",std::ios::in);
> >         if(file){
> >              while ( !file.eof() ){
> >                 std::string line;
> >                 Real p0,p1,p2,s,o0,o1,o2;
> >                 while ( std::getline(file, line) ){
> >                     file >> p0 >> p1 >> p2 >> s >> o0 >> o1 >> o2;
> >                     vtkIdType pid[1];
> >                     pid[0] = crackPos->InsertNextPoint(p0, p1, p2);
> >                     crackCells->InsertNextCell(1,pid);
> >                     crackSize->InsertNextValue(s);
> >                     float n[3] = { o0,o1,o2 };
> >                     crackOri->InsertNextTupleValue(n);
> >                 }
> >              }
> >              file.close();
> > }
> >
> > /// here is the code to create the VTK file
> > vtkSmartPointer<vtkUnstructuredGrid> crackUg =
> vtkSmartPointer<vtkUnstructuredGrid>::New();
> > crackUg->SetPoints(crackPos);
> > crackUg->SetCells(VTK_VERTEX, crackCells);
> > crackUg->GetPointData()->AddArray(crackSize);
> > crackUg->GetPointData()->AddArray(crackOri);
> >
> > vtkSmartPointer<vtkXMLUnstructuredGridWriter> writer =
> vtkSmartPointer<vtkXMLUnstructuredGridWriter>::New();
> > string
> fn=fileName+"cracks."+lexical_cast<string>scene->currentIteration)+".vtu";
> > writer->SetFileName(fn.c_str());
> > writer->SetInput(crackUg);
> > writer->Write();
> >
> > Do you have any advice?
> >
> > Tahnks a lot in advance
> >
> >   Luc
> >
> >
> >
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