How to get curve lines from an element on a floor plan and make it double-scaled?

Hello,

I’ve been trying to create curve lines from single element on a floor plan as it’s shown on the plan, and would like to make it double-scaled with the same center point. It seems like I need to get points of the element first, but don’t know where to start. Can anyone suggest an idea?

Thank you.

  1. Get the original element’s solids.
  2. Intersect with the view’s plane which you want to put the detail curves in.
  3. Get the perimeter curves of the resulting surface.
  4. Join into a polycurve.
  5. Offset the polycurve by your desired distance.
  6. Explode the polycurve to individual curves.
  7. Draw your detail lines from those.

Hello, thank you for your reply.
I understand the concept and process of your idea, but could you suggest which nodes I need to use for those steps?