[vtkusers] avoiding/removing non-manifold parts from the result of vtkMarchingCubes

[Bill Lorensen]

Marching Cubes should not generate non-manifold surfaces. The offending
triangle looks suspicious. What does the rest of your pipeline look like?



On Fri, Aug 2, 2013 at 8:23 AM, Dr. Roman Grothausmann <
grothausmann.roman at mh-hannover.de> wrote:

> Dear mailing list members,
>
>
> Recently, I came across a voxel-dataset that when meshed with
> vtkMarchingCubes results in a mesh that contains non-manifold edges
> (magenta line in attached image).
> How can this be avoided?
> Using paraview's contour filter and switching off "Generate Triangles"
> creates a slightly different surface mesh that does not contain
> non-manifold edges. However vtkMarchingCubes does not seem to have any
> option concerning triangulation.
> What filter/option do I have to use to get the same result just with pure
> VTK?
>
> As a workaround: Is it possible to split the mesh at non-manifold edges?
> vtkIntersectionPolyDataFilter sounds promising but seems to need surfaces
> not just the edges.
>
> Any help or hints are very much appreciated
> Roman
>
> --
> Dr. Roman Grothausmann
>
> Tomographie und Digitale Bildverarbeitung
> Tomography and Digital Image Analysis
>
> Institut für Funktionelle und Angewandte Anatomie, OE 4120
> Medizinische Hochschule Hannover
> Carl-Neuberg-Str. 1
> D-30625 Hannover
>
> Tel. +49 511 532-9574
>
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