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Public Member Functions | List of all members
StPhysicalHelix Class Reference
Inheritance diagram for StPhysicalHelix:
StHelix StFtpcTrack

Public Member Functions

 StPhysicalHelix (const StThreeVector< double > &, const StThreeVector< double > &, double, double)
 
 StPhysicalHelix (double, double, double, const StThreeVector< double > &, int h=-1)
 
StThreeVector< double > momentum (double) const
 
StThreeVector< double > momentumAt (double, double) const
 
int charge (double) const
 
double curvatureSignedDistance (double x, double y)
 
double geometricSignedDistance (double x, double y)
 
double curvatureSignedDistance (const StThreeVector< double > &)
 
double geometricSignedDistance (const StThreeVector< double > &)
 
- Public Member Functions inherited from StHelix
 StHelix (double c, double dip, double phase, const StThreeVector< double > &o, int h=-1)
 curvature, dip angle, phase, origin, h
 
double dipAngle () const
 
double curvature () const
 
double phase () const
 1/R in xy-plane
 
double xcenter () const
 aziumth in xy-plane measured from ring center
 
double ycenter () const
 x-center of circle in xy-plane
 
int h () const
 y-center of circle in xy-plane
 
const StThreeVector< double > & origin () const
 -sign(q*B);
 
void setParameters (double c, double dip, double phase, const StThreeVector< double > &o, int h)
 starting point
 
double x (double s) const
 coordinates of helix at point s
 
double y (double s) const
 
double z (double s) const
 
StThreeVector< double > at (double s) const
 
double cx (double s) const
 pointing vector of helix at point s
 
double cy (double s) const
 
double cz (double s=0) const
 
StThreeVector< double > cat (double s) const
 
double period () const
 returns period length of helix
 
pair< double, double > pathLength (double r) const
 path length at given r (cylindrical r)
 
pair< double, double > pathLength (double r, double x, double y)
 path length at given r (cylindrical r, cylinder axis at x,y)
 
double pathLength (const StThreeVector< double > &p, bool scanPeriods=true) const
 path length at distance of closest approach to a given point
 
double pathLength (const StThreeVector< double > &r, const StThreeVector< double > &n) const
 path length at intersection with plane
 
double pathLength (double x, double y) const
 path length at distance of closest approach in the xy-plane to a given point
 
pair< double, double > pathLengths (const StHelix &, double minStepSize=10 *micrometer, double minRange=10 *centimeter) const
 path lengths at dca between two helices
 
double distance (const StThreeVector< double > &p, bool scanPeriods=true) const
 minimal distance between point and helix
 
bool valid (double world=1.e+5) const
 checks for valid parametrization
 
int bad (double world=1.e+5) const
 
virtual void moveOrigin (double s)
 move the origin along the helix to s which becomes then s=0
 

Additional Inherited Members

- Static Public Attributes inherited from StHelix
static const double NoSolution = 3.e+33
 
- Protected Member Functions inherited from StHelix
void setCurvature (double)
 
void setPhase (double)
 performs also various checks
 
void setDipAngle (double)
 
double fudgePathLength (const StThreeVector< double > &) const
 value of S where distance in x-y plane is minimal
 
- Protected Attributes inherited from StHelix
bool mSingularity
 
StThreeVector< double > mOrigin
 
double mDipAngle
 
double mCurvature
 
double mPhase
 
int mH
 
double mCosDipAngle
 
double mSinDipAngle
 
double mCosPhase
 
double mSinPhase
 

Detailed Description

Definition at line 36 of file StPhysicalHelix.hh.


The documentation for this class was generated from the following files: