[Paraview] polygon offset

[Berk Geveci]

Is this what you are asking?

vtkMapper.h

  // Description:
  // Set/Get a global flag that controls whether coincident topology (e.g.,
a
  // line on top of a polygon) is shifted to avoid z-buffer resolution (and
  // hence rendering problems). If not off, there are two methods to choose
  // from. PolygonOffset uses graphics systems calls to shift polygons, but
  // does not distinguish vertices and lines from one another. ShiftZBuffer
  // remaps the z-buffer to distinguish vertices, lines, and polygons, but
  // does not always produce acceptable results. If you use the ShiftZBuffer
  // approach, you may also want to set the ResolveCoincidentTopologyZShift
  // value. (Note: not all mappers/graphics systems implement this
  // functionality.)
  static void SetResolveCoincidentTopology(int val);
  static int  GetResolveCoincidentTopology();
  static void SetResolveCoincidentTopologyToDefault();
  static void SetResolveCoincidentTopologyToOff()
    {SetResolveCoincidentTopology(VTK_RESOLVE_OFF);}
  static void SetResolveCoincidentTopologyToPolygonOffset()
    {SetResolveCoincidentTopology(VTK_RESOLVE_POLYGON_OFFSET);}
  static void SetResolveCoincidentTopologyToShiftZBuffer()
    {SetResolveCoincidentTopology(VTK_RESOLVE_SHIFT_ZBUFFER);}


On 12/6/05, Dominik Szczerba <domi at vision.ee.ethz.ch> wrote:
>
> Thanks a lot, yes, still however it is far from what I used to get with
> my own small codes, but that might be an issue for VTK mailing list
> instead. Still, it looks a bit like a dead-end to me (where to put it?).
> bye
> Dominik
>
> Wylie, Brian wrote:
> > Okay I know this is a not a 'solution' but for a quick fix set the line
> > width to '2' instead of '1'. It will look much better. :)
> >
> >   Brian Wylie - Org 9227
> >   Sandia National Laboratories
> >   MS 0822 - Building 880/A1-J
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> >
> >>-----Original Message-----
> >>From: paraview-bounces+bnwylie=sandia.gov at paraview.org
> >>[mailto:paraview-bounces+bnwylie=sandia.gov at paraview.org] On
> >>Behalf Of Dominik Szczerba
> >>Sent: Tuesday, December 06, 2005 9:26 AM
> >>To: paraview at paraview.org
> >>Subject: [Paraview] polygon offset
> >>
> >>Hello,
> >>Does Paraview support OpenGL polygon offset extension? If I
> >>try to visualize e.g. a tet mesh with edges (extract edges,
> >>shrink tets) the result looks very bad. Does VTK offer it at
> >>all? Is it at all possible using the VTK's filter philosophy?
> >>regards,
> >>Dominik
> >>--
> >>Dominik Szczerba, Dr.
> >>ETZ C110 CO-ME/BIWI CH-8092 Zurich
> >>http://www.vision.ee.ethz.ch/~domi
> >>_______________________________________________
> >>ParaView mailing list
> >>ParaView at paraview.org
> >>http://www.paraview.org/mailman/listinfo/paraview
> >>
> >
> >
>
> --
> Dominik Szczerba, Dr.
> Computer Vision Lab CH-8092 Zurich
> http://www.vision.ee.ethz.ch/~domi
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