[vtk-developers] Polyhedral challenge

[Will Schroeder]

The third method below is implemented and supports polyhedron. Comments
welcome.

  // Description:
  // Insert/create cell in object by type and list of point ids defining
  // cell topology. Most cells require just a type which implicitly defines
  // a set of points and their ordering. However, some cells like
  // vtkPolyhedron require points plus a list of faces. Note when inserting
  // faces, the standard vtkCellArray format is assumed
(n,i,j,k,n,i,j,k,...).
  vtkIdType InsertNextCell(int type, vtkIdType npts, vtkIdType *pts);
  vtkIdType InsertNextCell(int type, vtkIdList *ptIds);
  vtkIdType InsertNextCell(int type, vtkIdType npts, vtkIdType *ptIds,
                           vtkIdType nfaces, vtkIdType *faces);



On Tue, Feb 23, 2010 at 12:09 PM, Mark Olesen <Mark.Olesen at faurecia.com>wrote:

> On Thu, 2010-02-18 at 11:38 -0500, Will Schroeder wrote:
> > Hua and I have made progress on adding a vtkPolyhedron cell to VTK. We
> > have a wiki page describing the tasks (which will take some time
> > to implement depending on our funding and
> > schedule http://www.vtk.org/Wiki/VTK/Polyhedron_Support). We are using
> > the interpolation method of mean value coordinates which Hua has
> > already implemented, thus far it is a super algorithm. Comments are
> > welcome.
> >
> >
> > We are now starting the integration into vtkUnstructuredGrid. If you
> > are interested let me know and at the appropriate point we can make
> > our git repository available.
>
> A sneak preview of the API would be useful (eg, how the InsertNextCell
> would look).
> I have a freshly written proSTAR reader that needs polyhedral support --
> I could also offer it for miscellaneous testing purposes.
>
> /mark
>
>
>
>
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-- 
William J. Schroeder, PhD
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065
will.schroeder at kitware.com
http://www.kitware.com
(518) 881-4902
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