[vtkusers] Shrinkwrap surface possible?

[Will Schroeder]

Hi Steve-


>What I would like to do is generate a surface that 'shrink wraps' the
>sponge.  The surface would have the basic shape of the sponge, but
>stretches across the surface holes.  Does somebody have an idea of how I
>could generate such a surface?

There are two options:

1) Use vtkHull. It will create a convex hull of the input given a set of 
initial planes the it "pushes" in until they touch the input.. The input 
must be of type vtkPolyData. By default vtkHull uses six planes (the faces 
of a cube), but you can add vertex and edge planes to get a total of 26 
planes. If you want you can manually add planes. vtkHull is quite fast.

2) Use vtkDelaunay3D which will produce a convex hull. Then use 
vtkGeometryFilter to extract the surface of the convex hull.

Will



William J. Schroeder, Ph.D.
Kitware, Inc.
469 Clifton Corporate Parkway
Clifton Park, NY 12065
will.schroeder at kitware.com
1-518-371-3971 x102 (phone)
1-518-371-3971 (fax)