I don't think you can do this with one Shell element.
The closest I can think of would be to slice the building with parallel vertical planes at like 1-2-3 meter intervals or something. Then model each segment using the Ruled method of the Shell.
You have shown the side View of the building. The vertical slicing planes would be perpendicular to the plane of this Side View. So they would be perpendicular to the longitudinal axis of the building.
I would probably model the mass of the building in SketchUp or something that can do it. Then I would import the geometry as an object into ArchiCAD.
Then I would define vertical cut planes and copy-paste the cut sections into the Floor Plan. Based on those cut section at 1-2-3 meter intervals you could create the individual Ruled Shell pieces.
I would use Shell Holes to cut those void areas from the Shells where the Windows are.
So like if the building is 100 meters long and the slices are 2 meters wide, you would have 50 Shell elements.
I hope this makes sense.
Some good programmer could actually write an Add-On to automate this. Then we could simulate any kind of surface in ArchiCAD. And because of the capabilites of the Shell Tool it would appear correctly in 2D, 3D. It would be awesome.
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Rubia Torres
