[vtkusers] Alternative to vtkDelaunay2D for surface reconstruction or how to get rid of "Edge not recovered, polygon fill suspect"

[Berti Krüger]

Hello everyone.

In my project i have a standard 3D triangle mesh surface where i select all vertices which lie inside a region (polygon) which is defined by a closed polyline created by an user interaction using the vtkContourWidget:

[cid:inline_01 at geary]

I then create a polygon mesh which has the shape of the vtkContourWidget polygon selection contour line plus the selected part of the underlying mesh and which lies like a sticker or texture on the the given stl mesh surface:

[cid:inline_00 at geary]

For the reconstruction of the surface i use the vtkDelaunay2D filter using all the points of the vtkContourWidget polygon and the mesh surface points as inputs.

This works absolutely great but depending on the used mesh i sometimes get the following error message from the vtkDelaunay2D filter:

"vtkDelaunay2D (0x556183dcfba0): Edge not recovered, polygon fill suspect"


Does anybody know why this happens and what i can do to get rid of this error?

While nice, but since i don't necessarily need the delaunay properties, is there an alternative to the vtkDelaunay2D filter to get a polygon surface mesh given a bunch of points as an input? (points -> surface)


Thank you very much in advance.

Regards,
Berti
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://public.kitware.com/pipermail/vtkusers/attachments/20181014/96b7d154/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: vtk_delaunay.jpg
Type: image/jpeg
Size: 259659 bytes
Desc: vtk_delaunay.jpg
URL: <https://public.kitware.com/pipermail/vtkusers/attachments/20181014/96b7d154/attachment-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: selection1.png
Type: image/png
Size: 968853 bytes
Desc: selection1.png
URL: <https://public.kitware.com/pipermail/vtkusers/attachments/20181014/96b7d154/attachment-0001.png>