Each model consists of 2 files *.pat and *.pts. *.pts lists all the vertices. In *.pat the two-ring of each patch is stored.
Boundary patches must be regular and convex (in the current implementation).

constrained/airplane                    The airplane model used in the paper
constrained/cube2                       use for comparing the parametrization artifacts at different subdivision levels
constrained/cube32
constrained/ScrewedY                    Three different "joined cylinder" models. 
constrained/ThreeCylindersNoEndcaps
constrained/ThreePipes

unconstrained/head                      The head model used in the paper.
unconstrained/plane3x3                  a plate
unconstrained/TetraThingOneSideOpen     The unfolding "open" TetraThing.
unconstrained/TetraThingSym.distorted   The "closed" distorted TetraThing.
unconstrained/TorusFree                 A torus model.
