vtkContourFilter

[Bill Lorensen]

We expect to release 3.0 shortly. I'm guessing within the next week,

Bill

At 02:01 PM 10/8/99 -0400, Dr. Jasjit Suri wrote:
>Bill Lorensen wrote:
>
> > Folk,
> >         If you use vtk to extract isosurfaces AND build with the patented kit, read
> > on.... otherwise you can ignore this message.
> >
> > As you know, since the beginning of time (that is vtk time),
> > vtkContourFilter used vtkMarchingCubes (or Squares) if  1) you built your
> > vtk with patents and 2) your data was structured points. This has caused all
> > of us difficulties in the build process and, for some, has caused confusion
> > about what algorithm is being used.
> >
> > To remedy the above, we have removed the patent dependencies from
> > vtkContourFilter. The filter will now always use the "cell at a time"
> > approach, regardless of the data set topology.
> >
> > A new filter, vtkMarchingContourFilter, in the patented kit, acts like
> > the old vtkContourFilter. It uses the Marching classes if the data is
> > structured and vtkContourFilter (a cell at a time) if it's not.
> >
> > vtkContourFilter is about 1/2 the speed of vtkMarchingContourFilter for
> > structured data. So if you see a performance degradation in your app, change
> > vtkContourFilter to vtkMarchingContourFilter.
> >
> > Bill
>
>This is good news but this means, this change is only in the nightly release (going to
>be VTK 3.0), right !!!
>so, we have to down load every thing and recompile ....
>
>Have a nice weekend..
>
>jss




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