Ortogonal junction with geometry nodes

It must be very basic question, but unfortunately I didn’t manage to find the answer anywhere yet. This is a square profile by curve path.
How can I get ortogonal junction in vertices using Geometry nodes?
It is very simple to do in classic way just by switching form 3d to 2d in oject properties. Thanks in advanse! )

Welcome :tada:,
actually this isn’t soo easy… there was a disscusion a few weeks ago but i can’t find it now… ohh yes januar … a few weeks… :crazy_face:

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If you are just interested in a solution and do not mind getting some magic out of the box. Here you can get a very useful nodegroup which could solve your specific problem and allows for a lot more interesting things to do with curves.