wrong roof orientation on building=semidetached_house

[joshinils]

iff two semidetached_buildings share one common line (otherwise it's probably a tagging mistake) and they both share the same roof:shape these appear to be calculated for each "building" part separately.

for example https://osmbuildings.org/?lat=52.63502&lon=13.29674&zoom=20.0&tilt=22&rotation=-22
shows two semidetached_house right beside oneanother, sharing two nodes (one of them here https://www.openstreetmap.org/node/2270299444)
https://kartaview.org/details/3580373/1111/track-info shows the "two" buildings on the right

i would suggest merging these areas before deciding the roof orientation, since those almost always share the same orientation for the whole building (opposite to what would be logical if considered by themselves)
since streetcomplete does not ask for roof orientation currently one would have to manually add roof:orientation (and do so correctly) for this to be rendered correctly.