How to join closed coplanar curves?

[arquitextonica]

Hi, all!
Experienced Rhino/GH user moving to Dynamo.
I got level contour polylines, all closed and planar, and I want to “merge” the pair of courves on each level to get a final “common” contour for the floor slabs.
In Rhino it would be fairly easy with “booleancurves” and “join regions” in GH.
Little help on how to achieve this, please?

[Kulkul]

Hi @arquitextonica

Welcome to Dynamo Forum!
There is a custom node from archi-lab package that will merge the pair of curves.

[arquitextonica]

Thx! Will try it right now!!

[arquitextonica]

Seems to mix things weirdly. All polylines are paired on levels and construction is clear, but apparently the ouput of the component is not straight…

[Kulkul]

Can you show us screenshot of the graph with error expanded.

[arquitextonica]

Thanks for the interest!

[Nick_Curtis]

Using a more up to date version of Dynamo, You may try adjusting the Group Curves node input to list @ level 02…

[GigM]

From your “List.Transpose” node, you can try creating “Surface.ByPatch” for each curve loop. Then using “PolySurface.ByJoinedSurfaces” to build a joined surface (input surfaces should overlap or adjoin). From there, “Surface.PerimeterCurves” will return the outer loop.