That is very close but still not exactly the required result.
Notice the roof in the second image in my previous post. You can see that the roof has 7 segments, not the 3 in your try.
Segments 1,2,7 have a horizontal border. Segments 3,4,5,6 all have a different inclinement that is reduced to 3 inclinements in your roof (1, 234, 567). Not having 7 segments means you can not adjust the texture angle for each segment like I did in this image for segments 2, 4, and 6.
Basicaly it comes back to where this started: the need to incline a border along the wall slope.
Take the room used for the roof. Generate the roof, set the long back to 90° and set the rest to 20°. That is almost correct IF the border would follow the slope of the wall. I don't think you can get that with setting other faces to 90° because it moves other faces to act as a single face following the incline like in your example. That's why you only get 3 segments and not the 7 there should be.
I think the problem is that there is no face for the needed inclinement which can be set to 90° and made invisible. I can't figure out if the room itself could be changed so those extra faces will appear. Adding points at the center of the sloping edges didn't give the wanted result.
Could there be an 'easy' solution if the generator creates an extra face for a sloping wall? This would mean that the generator would have to use walls instead of a room. (The start-end points of a wall are almost the same as the points of a room.) It might make it easier to create holes in a roof too.
A few remarks:
• Previously when you dragged the angle arrow the preview image and degree-number updated while dragging. Now it only updates on mouse-up.
• Wasn't there an option for extending the roof outside the room? (So you don't have to create a larger room.) Or is that just wishful thinking?
Anyway, great work and the effort to find a solution withing the current possibilities is very much appreciated!
Edit: fixed image link
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