Here is an image in which I tried to explain why this scenario is hard (as you change Roof Slope, vertical thickness of Roof changes, plus you want to have the top of the Roof at certain height at its eaves and ridges, but you can only control the elevation of the bottom of the Roof via its Pivot Line).
If you look at the Section you will see that it is relatively easy to calculate the Roof Pivot Line Height and Roof Slope from the values of the desired Eaves Height, desired Ridge Height and perpendicular distance between the Eave and Ridge on the Floor Plan.
After you do this you will still need to set the Roof Edges to the proper angles, but that is a smaller task compared to this.
Edit: actually you don't need to go to the Section each time as I wrote in the image because you can measure the perpendicular distance between the Eave and Ridge on the Floor Plan as well.
If you look at the Section you will see that it is relatively easy to calculate the Roof Pivot Line Height and Roof Slope from the values of the desired Eaves Height, desired Ridge Height and perpendicular distance between the Eave and Ridge on the Floor Plan.
After you do this you will still need to set the Roof Edges to the proper angles, but that is a smaller task compared to this.
Edit: actually you don't need to go to the Section each time as I wrote in the image because you can measure the perpendicular distance between the Eave and Ridge on the Floor Plan as well.
Hi.
As Laszlo said... It will be really hard to do it using roofs, as they only have a single constant slope perpendicular to the pivot line, so if the opposite end (to the pivot line) is not parallel, each end corner will have different heights. Try that with four different roofs (with different odd connection angles in plan view) and you've gotten yourself a roof nightmare.
I am assuming that the geometry you are trying to make is kind of deformed; I mean, not constant in the way the roofs and its pivot line work. In attachment, in the two right side examples, end roof lines and pivot lines are parallel, and even with strange angles between roof's pivot lines, there's a way to adjust slope for each and keep every end line in the same Z position as long as that rule is met. Try to make them with the red outline and there will be problems.
This is a great opportunity and ideal scenario to use the shell tool. It'll be super easy to do what you want with four ruled shells (or even a single one could do). You'll loose some info from the roof tool regarding slopes, but it'll be really easy to model.
Or... as a last resource, use two meshes. First model roof top surface, then copy that mesh and lower it to use as SEO operator.
Hope I did not misunderstood and that helps a bit.
Best regards.
As Laszlo said... It will be really hard to do it using roofs, as they only have a single constant slope perpendicular to the pivot line, so if the opposite end (to the pivot line) is not parallel, each end corner will have different heights. Try that with four different roofs (with different odd connection angles in plan view) and you've gotten yourself a roof nightmare.
I am assuming that the geometry you are trying to make is kind of deformed; I mean, not constant in the way the roofs and its pivot line work. In attachment, in the two right side examples, end roof lines and pivot lines are parallel, and even with strange angles between roof's pivot lines, there's a way to adjust slope for each and keep every end line in the same Z position as long as that rule is met. Try to make them with the red outline and there will be problems.
This is a great opportunity and ideal scenario to use the shell tool. It'll be super easy to do what you want with four ruled shells (or even a single one could do). You'll loose some info from the roof tool regarding slopes, but it'll be really easy to model.
Or... as a last resource, use two meshes. First model roof top surface, then copy that mesh and lower it to use as SEO operator.
Hope I did not misunderstood and that helps a bit.
Best regards.
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