[vtkusers] Is there a class for isosurface extraction in VTK using "seed cells" approach

[James Zhou]

Hi all,

We know there are Marching Cubes and other similar isosurface extraction
classes in VTK. I want to know whether there is a class uisng "seed cells"
approach. In Marching Cubes, all cells are searched for isosurface
intersection, and thus O(N) time is needed. One of the techniques avoiding
exhaustive scanning is seed cells approach, which identifies a collection of
seed cells and performing contour propagation from the seed cells [1, 2],

[1] T. Itoh and K. Koyamada. Automatic isosurface propagation using an
extrema graph and sorted boundary cell lists. IEEE Transactions on
Visualization and Computer Graphics, 1(4):319¨C327, December 1995.
[2] M. van Kreveld, R. van Oostrum, C. L. Bajaj, V. Pascucci, and D. R.
Schikore. Contour trees and small seed sets for isosurface traversal. In
Proc. ACM Symp. on Comput. Geom., pages 212¨C220, 1997.

Anyone give me any ideas?

Thanks!

James
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