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[cgal-discuss] Re: Help: how to load 3D tet mesh from file into c3t3 (sorry if noob)


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  • From: toddoe <>
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  • Subject: [cgal-discuss] Re: Help: how to load 3D tet mesh from file into c3t3 (sorry if noob)
  • Date: Thu, 11 Mar 2010 08:23:20 -0800 (PST)


Thanks for the reply.

Not the answer i expected... but I'm probably just not asking the right
question.

My meshes are all delaunay and convex. That's no problem. But, in fact all i
want to do is just load meshes that were created in cgal and saved as mesh
file.

One of my purposes for doing this is to generate very large parametric
meshes on a distributed system. I would like to generate an 'initial' mesh
using cgal and save as a mesh file. Then i would like to load that mesh into
256 cpus running 256 refinement executables in parallel (with varying
refinement parameters, obviously).

I also have written some very specific surface smoothing algorithms (in
matlab) that manage some artifacts of our micro-mri system. what i'd really
like to do, is generate a mesh in cgal, output as mesh file, load into
matlab, fix/smooth the surface and re-save to mesh file, read mesh file back
into cgal and refine. In my case the surface smoothing is very minimal
(motions much less than 1 voxel size) but important for my final solution. I
don't think these smoothing node displacements will violate any convexity.

Another important reason to load meshes is the development of adaptive mesh
refinement schemes (FEA).

There must be some way to read tetrahedral meshes and generate or use an
appropriate 'domain' , and/or create a c3t3 and domain that allows for the
following:

CGAL::refine_mesh_3(c3t3, domain, new_criteria);

So with this rather lengthy description, is there anyone who can help with a
simple mesh reader? Or, as a minimum give me some advice as to how i could
do this myself, given that i'm not a super cpp expert.

Thanks again.



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