I’m trying to figure out how to determine if a manifold (solid) group is composed of more than one solid bodies.
Once I determine that more than one solid body exists I would like to collect all of the edges of each body into a separate array/list for each body.
An example of where this might come in useful is a situation where some structural subtraction occurs and the remaining ceiling joist or rafter is now actually two pieces:
At this point I am now wanting to know the lengths of each of the two remaining members, which I can do by some logic and checking the longest edge within the manifold/group. However I first need to divide the edges per the solid objects remaining.
Knowing that the outer group is manifold …
# Where ...
ary = group.entities.to_a
pieces = []
# The recursive idea ...
face = ary.find {|e| e.is_a?(Sketchup::Face) }
piece = face.all_connected
pieces << piece
ary = ary - piece
# repeat until ary is empty
… the example does not handle other things like section planes. They would need to be checked for and deleted from ary so that only faces and edges remain. Code defensively.
As always, thank-you Dan, I will play around with this a bit more today and post up my results and any additional questions or comments.