StTrackGeometry : Virtual Functions
StTrackGeometry is an interface (only pure virtual functions):
virtual StTrackModel model() const = 0;
virtual Short_t charge() const = 0;
virtual Double_t curvature() const = 0;
virtual Double_t psi() const = 0;
virtual Double_t dipAngle() const = 0;
virtual const StThreeVectorF& origin() const = 0;
virtual const StThreeVectorF& momentum() const = 0;
virtual StPhysicalHelixD helix() const = 0;