You would modify your roof to just include the sheathing and roofing from the ext. face of stud out to the edge of the over hang, then in section you will see exactly what you want. Basically you are looking at 2 roofs. 1 roof from ext f.o.s. inward, and 1 roof from ext f.o.s. outward. The inward one would have the structure, the outer wouldn't