[vtkusers] Isosurface opacity problem

[이현철]

I sent you two images, input file and iso-contour image.
I had no problem to look at input file and iso-contour.

Problem is
when I set Representation option with "Surface with edges".

Input file image looks normal but iso-contour image gone through
vtkMarchingContourFilter  has triangles.
Thank you very much.

2010년 12월 17일 오후 5:35, Sebastien Jourdain <sebastien.jourdain at kitware.com>님의
말:

> The reason is because you ask to look at the input file and not the
> iso-contour. The little eye on the left is disable in front of the
> contour.
>
> Seb
>
> PS: Once you change something on a filter, don't forget to click on Apply
>
> 2010/12/17 이현철 <basalt76 at gmail.com>:
>  > I'm very sorry for bothering you.
> >
> > I got something interesting.
> >
> > In the ParaView, when I set Representation with "Surface with edges".
> >
> > The isosurface image went through vtkMarchingContourFilter has the
> > triangles.
> > But the original image looks normal.
> >
> > I have used vtkCleanPolyData and vtkPolyDataNormals.
> >
> > I attached two iamges.
> >
> > Thank you ver much.
> >
> > Lee.
> >
> > 2010년 12월 17일 오후 12:55, 이현철 <basalt76 at gmail.com>님의 말:
> >>
> >> Thank you for your advice
> >>
> >> I loaded my isosurface into ParaView and set opacity under 1.0.
> >> It looks normal ~
> >>
> >> Is this means that the ParaView do something special to solve
> transparency
> >> problem ?
> >>
> >> I attached the result.
> >>
> >> 2010년 12월 15일 오후 11:21, Sebastien Jourdain
> >> <sebastien.jourdain at kitware.com>님의 말:
> >>>
> >>> How did you defined your unstructured grid ? It seems that some inner
> >>> surface are detected...
> >>> This could happen if you duplicate the points so each cell has its own
> >>> points ?
> >>>
> >>> Try to load your data into ParaView and see if you can reproduce the
> >>> problem.
> >>>
> >>> Seb
> >>>
> >>> 2010/12/15 이현철 <basalt76 at gmail.com>:
> >>> > Sorry to interrupt you again.
> >>> >
> >>> > I attach two images.
> >>> >
> >>> > Before and after adding depth sorting.
> >>> > There are some differences.
> >>> >
> >>> > My graphics card seems not to support depth peeling.
> >>> >
> >>> > Thank you very mush.
> >>> >
> >>> > Lee.
> >>> >
> >>> > 2010/12/15 Sebastien Jourdain <sebastien.jourdain at kitware.com>
> >>> >>
> >>> >> You should enable depth peeling on the renderer to fix most of the
> >>> >> artefact. But the rendering will be slower.
> >>> >>
> >>> >> Seb
> >>> >>
> >>> >> On Tue, Dec 14, 2010 at 10:01 AM, 이현철 <basalt76 at gmail.com> wrote:
> >>> >> > Dears
> >>> >> >
> >>> >> > I visualized isosurface using vtkMarchingContourFilter from
> >>> >> > vtkUnstructuredGrid.
> >>> >> >
> >>> >> > When the opacity is 1.0 , created picture looks normal.
> >>> >> >
> >>> >> > But when i adjust opacity to below 1.0, the picture has speckles
> >>> >> > depends
> >>> >> > on the position.
> >>> >> >
> >>> >> > Do you have any solution ?
> >>> >> >
> >>> >> > I'll really appreciate it.
> >>> >> >
> >>> >> > Attached images
> >>> >> >
> >>> >> > _______________________________________________
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> >>> >
> >>> >
> >>
> >
> >
>
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