[vtkusers] Remeshing or: how to get a "better" surface mesh from a vtkCylinderSource

[Andrea Borsic]

Hi Norman,

I suggest having a look at ACVD from Creatis 
(https://www.creatis.insa-lyon.fr/site/en/acvd.html). This is a 
coarsening library for triangulated meshes which is aware of triangle 
quality. The package is based on VTK, and it is distributed in the form 
of a binary (ACVD.exe for Windows) - which would allow you a quick test 
on a vtkPolyData saved to file - and the package is also available in 
source form.

I am using it on input surface meshes from medical applications with 
success. It might be worth trying it on your own problems. The effort to 
get it working should be limited.

Best Regards,

Andrea

P.S. Note that in my experience you can not only coarsen a mesh, but 
also increase the original number of nodes ... this might be useful in 
the case of the cylinder example.



On 23-May-16 8:40 PM, normanius wrote:
> Hi all
>
> My question is whether it is possible to remesh an existing surface such
> that the original geometry is preserved, but the triangulation has "nice"
> properties.
>
> Let me exemplify my problem with vtkCylinderSource. If you try to extract
> the triangulated surface mesh, you will notice that the triangles of the
> cylinder jacket are very sharp and spread the full height. Have a look at
> the screenshot.
>
> Some filters require a more homogenous triangulation of such a surface. How
> could this be done in VTK?
>
> Thanks!
> Norman
>
> By the way, this is how I extract the triangles of a cylinder source:
>
>
> Screenshot 1: Wireframe of a vtkCylinderSource
> Screenshot 2: Result after remeshing of the cylinder in an external tool
>
> <http://vtk.1045678.n5.nabble.com/file/n5738187/vtkCylinderSource-mesh.png>
> <http://vtk.1045678.n5.nabble.com/file/n5738187/cylinderRemeshedStarCCM%2B.png>
>
>
>
>
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-- 
++++++++++++++++++++++++++++++++++++
Andrea Borsic Ph.D.
CEO & Founder NE Scientific LLC
Tel: +1 603 676 7450
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Twitter: https://twitter.com/ne_scientific