FastLine Class Reference

#include <FastLine.h>

Public Member Functions
double	c () const
	FastLine (const GlobalPoint &outerHit, const GlobalPoint &innerHit)
	FastLine (const GlobalPoint &outerHit, const GlobalPoint &innerHit, double rho)
bool	isValid () const
double	n1 () const
double	n2 () const
	~FastLine ()

Private Member Functions
void	createLineParameters ()

Private Attributes
double	theC
GlobalPoint	theInnerHit
double	theN1
double	theN2
GlobalPoint	theOuterHit
double	theRho
bool	theValid

Detailed Description

Calculate the Line parameters (n1, n2, c) of a Line in Rho*Phi-Z. A Line is defined by n1*x + n2*y + c = 0. (== n1*RHOPHI + n2*Z + c) If rho is not specified, the Line parameters are calculated in R-Z.

Implementation: Matthias Winkler 21.02.2001

Definition at line 15 of file FastLine.h.

Constructor & Destructor Documentation

FastLine::FastLine	(	const GlobalPoint &	outerHit,
		const GlobalPoint &	innerHit
	)

Definition at line 3 of file FastLine.cc.

References createLineParameters().

                                        : 
  theOuterHit(outerHit),
  theInnerHit(innerHit),
  theRho(0.),
  theN1(0.),
  theN2(0.),
  theC(0.),
  theValid(true) {

  createLineParameters();
  
}

FastLine::FastLine	(	const GlobalPoint &	outerHit,
		const GlobalPoint &	innerHit,
		double	rho
	)

Definition at line 17 of file FastLine.cc.

References createLineParameters().

                       : 
  theOuterHit(outerHit),
  theInnerHit(innerHit),
  theRho(rho),
  theN1(0.),
  theN2(0.),
  theC(0.),
  theValid(true) {

  createLineParameters();
  
}

FastLine::~FastLine ( )

inline

Definition at line 26 of file FastLine.h.

{}

Member Function Documentation

double FastLine::c ( ) const

inline

Definition at line 32 of file FastLine.h.

References theC.

Referenced by ConversionFastHelix::helixStateAtVertex(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectory(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectoryFromTriplet(), ConversionFastHelix::straightLineStateAtVertex(), and FastHelix::straightLineStateAtVertex().

{return theC;}

void FastLine::createLineParameters ( )

private

Definition at line 32 of file FastLine.cc.

References n1(), n2(), PV3DBase< T, PVType, FrameType >::perp(), PV3DBase< T, PVType, FrameType >::perp2(), mathSSE::sqrt(), theC, theInnerHit, theN1, theN2, theOuterHit, theRho, and PV3DBase< T, PVType, FrameType >::z().

Referenced by FastLine().

                                    {

  double rphi0 = 0., rphi1 = 0.;

  if(theRho > 0.) {
    if (fabs( 1. - theInnerHit.perp2()/(2.*theRho*theRho) ) > 1.) rphi0 = theInnerHit.perp();
    else rphi0 = theRho*acos(1. - theInnerHit.perp2()/(2.*theRho*theRho));
    if (fabs(1. - theOuterHit.perp2()/(2.*theRho*theRho) ) >1.) rphi1 = theOuterHit.perp();
    else rphi1 = theRho*acos(1. - theOuterHit.perp2()/(2.*theRho*theRho));
  } else {
    rphi0 = theInnerHit.perp();
    rphi1 = theOuterHit.perp();
  } 

  double n1 = theInnerHit.z() - theOuterHit.z();
  double n2 = -(rphi0 - rphi1);
  double norm = sqrt(n1*n1 + n2*n2);
  theN1 = n1/norm;
  theN2= n2/norm;
  theC = -(theN1*rphi0 + theN2*theInnerHit.z());
  //  theC = -(theN1*rphi1 + theN2*theOuterHit.z());

}

bool FastLine::isValid ( void  ) const

inline

Definition at line 34 of file FastLine.h.

References theValid.

{return theValid;}

double FastLine::n1 ( ) const

inline

Definition at line 28 of file FastLine.h.

References theN1.

Referenced by createLineParameters(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectory(), ConversionFastHelix::straightLineStateAtVertex(), and FastHelix::straightLineStateAtVertex().

{return theN1;}

double FastLine::n2 ( ) const

inline

Definition at line 30 of file FastLine.h.

References theN2.

Referenced by createLineParameters(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectory(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectoryFromTriplet(), ConversionFastHelix::straightLineStateAtVertex(), and FastHelix::straightLineStateAtVertex().

{return theN2;}

Member Data Documentation

double FastLine::theC

private

Definition at line 44 of file FastLine.h.

Referenced by c(), and createLineParameters().

GlobalPoint FastLine::theInnerHit

private

Definition at line 39 of file FastLine.h.

Referenced by createLineParameters().

double FastLine::theN1

private

Definition at line 42 of file FastLine.h.

Referenced by createLineParameters(), and n1().

double FastLine::theN2

private

Definition at line 43 of file FastLine.h.

Referenced by createLineParameters(), and n2().

GlobalPoint FastLine::theOuterHit

private

Definition at line 38 of file FastLine.h.

Referenced by createLineParameters().

double FastLine::theRho

private

Definition at line 40 of file FastLine.h.

Referenced by createLineParameters().

bool FastLine::theValid

private

Definition at line 46 of file FastLine.h.

Referenced by isValid().