[vtkusers] Generate Mesh - Finite Element Analysis

[Paul Jhin]

Thank Bryn.






2009/1/4 Dominik Szczerba <dominik at itis.ethz.ch>

> You should add that to the wiki as it gets asked on and on.
>
> Dominik
>
> Bryn Lloyd wrote:
>
>> 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
>>>
>>
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> --
> Dominik Szczerba, PhD
> Computational Physics Group
> IT'IS Foundation
> http://www.itis.ethz.ch
>
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