I am writing due to an issue I am facing since a week, about uniting two closed BReps. So, I have a number of closed Breps (rectangle - building footprints) and the same number of closed Breps (triangle - roofs). I am trying to make these two closed BReps into one. I am following the tutorials in YouTube for energy simulations and I would like the final closed Brep to convert it to dragonfly object.
However, when I am trying to unite these two Breps I get this error: “1. Boolean Union set is empty.” (see img below)
Do you have any idea about that issue?
As your question is purely geometry related you would probably be better placed to post it on the Rhino / Grasshopper discourse forum.
In my experience the solid operations are some of the most temperamental in Rhino. One thing I do if I hit this issue is to bake them and see what boolean Union in Rhino returns to try and narrow down the issue.
I also have a feeling that if you pass two closed breps that aren’t touching to solid Union it will return that error and no geometry in the output - so script resilience wise it might be a faff to handle.
Hi @charlie.brooker many thanks for the reply and the suggestions I will try the baking for sure and see how it goes!
Again many thanks for the help. Really appreciate it!
I will try the baking for sure and see how it goes!