CATIA Training Foils Imagine and Shape

http://www.cadfamily.com/downinfo/301333.html
Subdivision algorithms are exceptionally simple, work for arbitrary control meshes and
produce globally smooth surfaces. Special choices of subdivision rules allow for the
introduction of features into a surface in a simple way.
Subdivision-based representations of complex geometry can be manipulated and
rendered very efficiently, which makes subdivision a highly suitable tool for interactive
animation and modeling systems.
Subdivision is an algorithmic technique to generate a smooth surface as a sequence
of successively refined polyhedral meshes.