Thank Bryn.<br><br><br><br><br><br><br><div class="gmail_quote">2009/1/4 Dominik Szczerba <span dir="ltr"><<a href="mailto:dominik@itis.ethz.ch">dominik@itis.ethz.ch</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
You should add that to the wiki as it gets asked on and on.<br>
<br>
Dominik<br>
<br>
Bryn Lloyd wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div class="Wj3C7c">
Hi Paul,<br>
<br>
Maybe you could try the vtkClipVolume filter. It will produce tetrahedra (not just the surface).<br>
<br>
<a href="http://www.vtk.org/doc/nightly/html/classvtkClipVolume.html" target="_blank">http://www.vtk.org/doc/nightly/html/classvtkClipVolume.html</a><br>
<br>
You might want to set Mixed3DCellGenerationOff() in order to avoid any wedges in your output.<br>
The quality of the mesh at the surface will most likely not be very good.<br>
<br>
<br>
<br>
As an alternative you could use the MarchinCubes filter. The output can be smoothed etc in order to improve the triangle quality.<br>
Then run the vtkDelaunay3D filter on the output. This will only work if your surface is convex!<br>
<br>
<br>
<br>
The third alternative is the best, for simulation purposes:<br>
Generate the surface as you have so far. Run some smoothing filter on the triangles in order to improve their quality.<br>
<br>
Then run the constrained delaunay meshing program by Hang Si (TetGen, <a href="http://tetgen.berlios.de/" target="_blank">http://tetgen.berlios.de/</a>) to generate tetrahedra.<br>
(or any other mesh generation software you have access to, e.g. Netgen).<br>
<br>
--Bryn<br>
<br>
<br>
<br>
<br>
On Jan 4, 2009, at 3:22 PM, Paul Jhin wrote:<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
vtkMarchingCubes<br>
</blockquote>
<br></div></div>
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</blockquote>
<br>
-- <br>
Dominik Szczerba, PhD<br>
Computational Physics Group<br>
IT'IS Foundation<br>
<a href="http://www.itis.ethz.ch" target="_blank">http://www.itis.ethz.ch</a><br>
</blockquote></div><br>