00001
00013 #ifndef _FRENET_H
00014 #define _FRENET_H
00015
00016 #include <Frame.H>
00017
00018 namespace xchen
00019 {
00021 struct Frenet : Frame
00022 {
00023 Frenet(const Frame& f, double kapa, double tau) : Frame(f), k(kapa), t(tau) { }
00024 Frenet() { }
00025
00026 double k, t;
00027
00028 friend ostream& operator <<(ostream& os, const Frenet& frt)
00029 {
00030 return
00031 os << (const Frame&) frt << endl << "curvature is " << frt.k << " and torsion is " << frt.t;
00032 }
00033 };
00034 }
00035
00036 #endif
00037
