[Paraview] polygon offset

[Berk Geveci]

Not really. It's more a GUI issue.

On 12/6/05, Dominik Szczerba <domi at vision.ee.ethz.ch> wrote:
>
> Oh yes indeed, I am talking about the first solution. Now is there a
> particular reason this swich is not available in paraview?
> Dominik
>
> Berk Geveci wrote:
> > 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
> >>>  (505)844-2238 FAX(505)845-0833
> >>>       ____                  _    __
> >>>      / __ \____  _________ | |  / (_)__ _      __
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> >>>    / ____/ /_/ / /  / /_/ /| |/ / /  __/ |/ |/ /
> >>>   /_/    \__,_/_/   \__,_/ |___/_/\___/|__/|__/
> >>>
> >>>                                    Unleash the Beast
> >>>
> >>>
> >>>
> >>>
> >>>>-----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
> >>_______________________________________________
> >>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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>
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