Bent glass , i.e. curved glass is extensively used by the auto industry for making windshields and by architects for creating glass domes, display cases, and revolving doors.
When float glass comes off the manufacturing line it is a flat sheet. Later the glass can be made to bend when the need or design calls for it. Due to the brittleness of glass, bending must happen while the glass is still warm enough to be manipulated but not so hot that it is molten.