HELLLLLLLLLLP! Visualizing wrap-around porch

[e.myers]

I need help bad. I'm designing this house that has a porch that wraps 3 sides of the house and I can't friggin get a handle on how the roof over the porches works.
It's a simple gable roof building with one gable end with it's 2 adjacent sides being wrapped. Note that all porch depths are the same for simplicity (yeah right).
What I don't get is how the hip rafters tie back into the sloping sides of the gable roof.
I think I understand that the roof will be longer on the sides that die back into the sloping part of the roof as compared to the side porch roof that dies into the gable end of the house.
What I don't get is why the hip ends up moving in towards the center of the sloping side.
I've been looking at some of these houses (pictures etc) and almost all of them do this.
I hate to admit it but this is cutting my tail!
Anybody know what I'm talking about? and can help me get a handle on it?
Is my design going to need to be based on the distance to the gable end from the porch edge and then have the sides that die into the sloped side kind of work themselves out?
I currently have it drawn with the porch slope starting roughly at the 1-1/2 story top plate, so now I'm getting concerned that this does something wacky at the gable side.
ANY and all help appreciated.

[Joe Carola]

If the depth on the sides are different from the front you will have two different pitches. Let's say for example the depth on the sides was 10' and the depth on the front was 8' and your pitch on the side was 8/12 so you have a run of 10' with an 8/12 pitch which would give you a rise of 80" (without legder thicknesses and H.A.P.cuts) now your front has a run of 8' to get the same rise of 80" (I'm sure the roof is at the same height at the top) your front pitch would be 10/12.

So now that you have a 8/12 on the side and a 10/12 on the front and if you keep the same overhangs your hip will shift off the corner towards the high pitch side. This always happens on porch roofs when they're not the same depth.

You will see when you draw it out to scale that when you put for example a 1' overhang that the hip will shift off the corner towards the 8' run side which is the 10/12 side.

Can you post a drawing or give the exact depth on the two sides and the front?

The two sides should be the same. If not then you will have three different pitches which is just as easy to figure but I need to know exact dimensions.

Here's a drawing of what I think.

Joe Carola