How do i get external curve on combined surface

[ckL]

hi all,

I would like to ask how do get the external curve of the combined area surface as the screenshot below, any guide will be much appreciated , thank you !

[Vikram_Subbaiah]

@ckL

I would like to ask how do get the external curve of the combined area surface

Create an polysurface and extract the perimeter curves.

[ckL]

Thank you for guidance, I completed the script with surface.byunion and perimetercurves as what you shown , sharing here is the script if is a help to anyone

Crop view to room boundary_final.dyn (46.7 KB)