Gehry's east river guggenheim project in NYC. The use of flexible sheet material like paper in physical models generates developable geometries.
Dennis Shelden, CTO at gt, describes in his phd thesis several ways to compute developable surfaces. Fig. (c) by Dennis Shelden.
Museum MARTa in Herford, Germany. Most of the roof surfaces are developable. Geometric modelling of the roof construction has been done by Jess Maertterer. Further discription on his page.
3 days ago