[vtkusers] RE: FW: [Paraview] Cutting cells of different dimension

[Amy Henderson]

At 03:04 AM 2/12/2004, ALIZIER Julien AUSY wrote:
>Thanks for your reply.
>For your information, I tried vtkKitwareCutter instead of vtkCutter and it
>had the same problem.
>
>-- Julien
>

They have the same problem because vtkCutter (superclass of=20
vtkKitwareCutter) handles the unstructured grid case for vtkKitwareCutter.

- Amy


>-----Message d'origine-----
>De : Amy Henderson [mailto:amy.henderson at kitware.com]
>Envoy=E9 : mercredi 11 f=E9vrier 2004 19:17
>=C0 : ALIZIER Julien AUSY; 'paraview at paraview.org'; 'vtkusers at vtk.org'
>Objet : Re: FW: [Paraview] Cutting cells of different dimension
>
>
>Hi Julien,
>
>The problem is in cell->Contour(...) (or maybe in the way vtkCutter is
>using cell->Contour(...)).  What's happening is that when the cell contours
>itself, it adds a new cell as necessary to the appropriate cell array
>(verts, lines, or polys), which returns the id of the cell in that array.
>Contour then uses that id to copy cell data to.  The problem is that if
>your data set has different types of cells, then the first vertex, line,
>and polygon inserted will all have the same cell id.  I'll add this as a
>bug report for VTK.
>
>- Amy
>
>At 10:25 AM 2/11/2004, ALIZIER Julien AUSY wrote:
> >And it does work if I use POINT_DATA instead of CELL_DATA.
> >Any ideas? I this a bug in vtkCutter or cell->Contour(...)?
> >
> >-- Julien
> >
> >
> >
> >-----Message d'origine-----
> >De : ALIZIER Julien AUSY [mailto:julien.alizier-ausy at irsn.fr]
> >Envoy=E9 : mercredi 11 f=E9vrier 2004 16:17
> >=C0 : 'paraview at paraview.org'; 'vtkusers at vtk.org'
> >Objet : [Paraview] Cutting cells of different dimension
> >
> >
> >Hi all,
> >
> >I am trying to make a cut of 3D and 2D cells in one Unstructured grid in
> >ParaView.
> >The problem is that it is possible to cut only if there is no data on=
 cells
> >(which is not very useful obviously ;-).
> >
> >Here is a tiny vtk file that shows the bug : it is a triangle and a line
>and
> >I'd like to cut them in order to get a line and a point. It works when I
> >removed the CELL_DATA part.
> >
> >Thanks for your help
> >
> >-- Julien
> >
> >
> ># vtk DataFile Version 2.0
> >cut problem with cell of different dimension
> >ASCII
> >DATASET UNSTRUCTURED_GRID
> >POINTS 5 float
> >0 0 0
> >2 0 2
> >1 3 1
> >4 0 4
> >4 3 4
> >
> >CELLS 2 7
> >3 0 1 2
> >2 3 4
> >
> >CELL_TYPES 2
> >5
> >3
> >
> >CELL_DATA 2
> >SCALARS cell_scalars float 1
> >LOOKUP_TABLE default
> >0
> >1
> >_______________________________________________
> >ParaView mailing list
> >ParaView at paraview.org
> >http://www.paraview.org/mailman/listinfo/paraview
>
>
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