[vtkusers] Re: Module for solid contours?

[Goodwin Lawlor]

Hi Charles,

Sometimes the output of vtkBandedPolyDataContourFilter is unexpected, cf
http://www.vtk.org/Bug/bug.php?op=show&bugid=727&pos=27
http://public.kitware.com/pipermail/vtkusers/2004-March/022780.html

I wrote a class with the same interface as vtkBandedPolyDataContourFilter
but the implemetation recursively uses a vtkPolyDataClip internally to
produce the bands or "solid contours". This class doesn't seem to produce
the artifacts that vtkBandedPolyDataContourFilter does. Here it is:

http://www.bioengineering-research.com/vtk/vtkRecursivePolyDataClip.cxx
http://www.bioengineering-research.com/vtk/vtkRecursivePolyDataClip.h

Ideally, it would be better to find the bug/reason for behaviour in
vtkBandedPolyDataContourFilter

hth

Goodwin

ps. probably should have named the class vtkRecursiveClipPolyData to be
consistent... but it was just written as a test.


"Charles Boivin" <Charles.Boivin at rwdiwest.com> wrote in message
news:s137042c.059 at mailwest.rwdiwest.com...
> Hello all,
>
> I would like to be able to visualize my data using "solid contours". I
> am not sure if this terminology is the correct one, but I know this is
> the name used in AVS, for example. Basically, I'd like to get the same
> information as with isolines, but with the regions between the lines all
> of a uniform color. I have attached a picture (generated in AVS) that
> illustrates what I would like.
>
> Is there a module in VTK that allows one to do such a thing? I have
> tried playing with the lookup table, and it is the closest I've been
> able to get to the right solution. The problem with this, however, is I
> still get some interpolation across cells, and the results are very
> blocky (because of underlying grid).
>
> Thank you,
>
> Charles Boivin
>


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