61#define PT_TSHOLD 1000.0
75#define EPSILON_COLLINEAR 1e-8
82#define EPSILON_COCIRCULAR 1e-12
111#define EPSILON_SPLITMERGE 1e-12
114const double twopi = 6.283185307179586476925286766559005768394;
123#define DEBUG_STABLE_CONES
124#define DEBUG_SPLIT_MERGE
const double twopi
definition of 2*M_PI which is useful a bit everyhere!