[Paraview] About 2D Glyph orientation

[luc scholtes]

Excellent!

This is exactly what I needed even if it is not really direct though... Does
someone know if there is a way to "automatize" this procedure, as with a
custom glyph? I tried to make a Custom Glyph but without any success
(probably missed all the steps necessary for such a combination). Or maybe I
could include the rotation of 90 degrees around Y-axis during the recording
of my data...

Cheers

  Luc

2010/5/13 Eric E. Monson <emonson at cs.duke.edu>

> Hey Luc,
>
> Ah, I see. I'd actually never looked at which way the 2D glyphs are
> oriented. Interesting.
>
> So with a slightly more complicated pipeline you can do it. From Sources
> create a 2D Glyph source. Apply a Transform filter to that, which only has a
> rotation of 90 degrees around the Y-axis. Then from your data, apply the
> Glyph With Custom Source filter, and when it pops up the dialog for choosing
> each, choose your data for Input and the Transform filter for Source.
>
> Seems like there should be an easier way of doing this, but it works. (see
> screen shot)
>
> Talk to you later,
> -Eric
>
>
> On May 12, 2010, at 6:59 PM, luc scholtes wrote:
>
> 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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>>
> <CircleOrientation>
>
>
>
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