Geometry Intersect Shows Empty List but still works?

Revit
1

I was wondering why I get an “Empty List” but still passes the values I need.

After spending an embarrassing amount of time trying to debug this, I finally just hooked up the nodes and it works?!

Is there something basic I’m missing here?

image

2

Geometry.Intersect is checking the intersection of every duct geometry with every pipe geometry. It only shows a count of 7 because it doesn’t count nulls and empty lists. Out of the 17,679 (83 duct x 213 pipe) tests it ran there are only 7 intersections - the 7 you get when flattened, because flatten gets rid of all the empty lists.

1 Like
3

Thank you for the clarification. You were spot on.:wink: