Abstract
The realization of freeform shapes in contemporary architecture has sparked research on its mathematical and
algorithmic foundations. This area, now often referred to as Architectural Geometry (AG), has close connections
to Discrete Differential Geometry (DDG) [1]. The transfer of ideas and inspiration goes in both directions:
Practical requirements in freeform architecture led to new concepts in DDG and known concepts in DDG turned
out to have applications in architecture [5]. Here, we will discuss some patterns arising in architecture and design
which are constrained by requirements on their fabrication and function.
