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Mesh generation from dirty surface meshes

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Old   December 9, 2007, 17:41
Default Hi all, I want to collect s
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Hi all,

I want to collect some ideas about my aim to run a case from which I only have dirty surface meshes. I do not have any geometry. Surface meshes represents geometry perfectly, however have free edges, overlappings,... From a commercial point of view this is good for surface wrapping or a tool like Harpoon. However, I want to use free software. Any ideas?
Gmsh could be possible: maybe convert into volumes and group them, mesh afterwards. However I do not know how to do. What oter ideas?
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Old   December 9, 2007, 22:19
Default Hi, Without knowing the det
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Hi,

Without knowing the details of your mesh, you can try tetgen. It can take surface mesh and generate a volume mesh from it.

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Old   December 10, 2007, 04:35
Default Or you can try SALOME www.salo
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Ruben I. Mukhamadeev
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Or you can try SALOME www.salome-platform.org
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Old   December 10, 2007, 06:46
Default Hi, both tools as far as I
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Hi,

both tools as far as I know have the disadvantage that surface mesh has to be absolutely clean (no interesections, free edges,...) My surface mesh is dirty. I need to repair this e.g. by wrapping or performing boolean operations on surfacemesh not on geometry (!) or I need to reconstruct geometry...
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Old   December 10, 2007, 06:53
Default Hm, to perform CAD cleaning as
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Hm, to perform CAD cleaning as a prestep towards meshing.... that's tough. One tool would be ANSA, another Gambit, but both are commercial so... not good for you.
I saw that Blender is able to read iges file formats. I think it has boolean operations with different primitives, but when I asked on their discussion list if it is appropriate to use it as CAD clean software.... I got no answer (at least until now).

Dragos
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Old   December 10, 2007, 08:29
Default Hi, please read my requirem
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Hi,

please read my requirements carefully: I do not have geometry, only dirty (intersecting, free edges,...) surface meshes from which I need to start volume meshing. Maybe one way would be to do geometry cleanup, however: Therefore a surface reconstruction is essential first.
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Old   December 10, 2007, 11:31
Default Sorry, my bad! But still thos
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Sorry, my bad!
But still those above should help you since they are able to read stl file formats too, and work with them.

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Old   December 10, 2007, 11:34
Default So Tetgen and Salome can perfo
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So Tetgen and Salome can perform boolean operations on surface meshes or do surface reconstruction? That are really good news...
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Old   December 10, 2007, 11:48
Default You can also have a look to jc
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You can also have a look to jcae (http://jcae.sf.net)
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Old   December 10, 2007, 12:17
Default jcae does not seem to be able
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jcae does not seem to be able to do boolean operations on meshes or surface reconstruction, does it?
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