Lines -> Polylines -> Polygons

[cobo (Cornelis Bockemühl)]

Maybe this is just a naming question, but what I want to achieve is:

• Read some linear data that are either already polylines, but maybe also just line segments with common end points that need to be joined first.

• Convert the polylines to polygons - just ignoring the possibility that start and end point may not coincide (meaning that a line segment would be inserted implicitly)

I know that the opposit functionality, i.e. cutting polyline into line segments, or “higher grade surfaces” into triangles etc. is done with the “vtkTriangulate” filter - which is also not a case of “intuitive naming”, but very handy if you need such operations! So I am asking whether such things already exist.

If not I see not a big problem writing such a filter myself, but why reinvent wheels?

[cory.quammen (Cory Quammen (Kitware))]

@cobo

Read some linear data that are either already polylines, but maybe also just line segments with common end points that need to be joined first.

vtkStripper with the JoinContiguousSegments flag set to on should do this.

@cobo

Convert the polylines to polygons - just ignoring the possibility that start and end point may not coincide (meaning that a line segment would be inserted implicitly)

Try vtkContourTriangulator.

[cobo (Cornelis Bockemühl)]

Many thanks: looks promising!