Amazing! Thank you for all the hard work.

Meanwhile I use this:

remember this challenge?: https://sweethome3d.com/support/forum/v ... ,190#60543
You are almost there. With the flexible elevated points almost any possible roof can be generated.
You do realize that this is very close to a multi-point 3D shape generator? That one is limited to 8 points but this proves it's possible to edit with many more points. Replace 'roof' with 'shape' and it's there. And I am definitely going to abuse it for that [:))]