Dynamo column formwork

Hi there dynamo users.
I have been struggling in finding the column formwork area.
I have got the intersected area of the column and beam but don’t have any clue how to subtract the intersected area?

2022-01-17_16h20_53
Intersect with what?

Column intersection with beam

You can get the intersecting faces and calling the area. Maybe there is some algorythm to access the intersacting faces.

I have got the intersecting face but i want to subtract it from the larger face if we have 1 column it can be done but i have several columns and framing


you have to develop a strategy to get the areas.
The suptracted area has to be stored in an additional Parameter.
to have just horizontial and vertical areas? or different intersecting areas?

Maybe try unioning them, exploding that and intersecting the faces against the original column geometry. Filter any geometry that doesn’t yield a surface (incident faces should be a curve result, non intersects will be a null).