special roof

[jamba_ITA]

Hello everyone,
I have a problem with building a roof. the dotted line represents the perimeter of the cover. I also inserted the frcecia to indicate pednenza.
I can't create roof levels so I can create cover as I wish. would serve a roof-type command for 3 points but does not exist. . .
How would you do that?

 

[Monte Baldo]

https://m.youtube.com/watch?v=kvzulwkoilw&list=plagdjbxrdciaip2wsd4k35t4dhqek5onk

 

[jamba_ITA]

https://m.youtube.com/watch?v=kvzulwkoilw&list=plagdjbxrdciaip2wsd4k35t4dhqek5onk

that I did, that video time ago I had also seen it (I am also hiding in the channel. . )