[vtkusers] Generate Mesh - Finite Element Analysis

[Bryn Lloyd]

Hi Paul,

Maybe you could try the vtkClipVolume filter. It will produce  
tetrahedra (not just the surface).

http://www.vtk.org/doc/nightly/html/classvtkClipVolume.html

You might want to set Mixed3DCellGenerationOff() in order to avoid any  
wedges in your output.
The quality of the mesh at the surface will most likely not be very  
good.



As an alternative you could use the MarchinCubes filter. The output  
can be smoothed etc in order to improve the triangle quality.
Then run the vtkDelaunay3D filter on the output. This will only work  
if your surface is convex!



The third alternative is the best, for simulation purposes:
Generate the surface as you have so far. Run some smoothing filter on  
the triangles in order to improve their quality.

Then run the constrained delaunay meshing program by Hang Si (TetGen, http://tetgen.berlios.de/) 
  to generate tetrahedra.
(or any other mesh generation software you have access to, e.g. Netgen).

--Bryn




On Jan 4, 2009, at 3:22 PM, Paul Jhin wrote:

> vtkMarchingCubes