#include <SteppingHelixPropagator.h>

Inheritance diagram for SteppingHelixPropagator:

Classes
struct	Basis

Public Types
enum	DestType { RADIUS_DT =0, Z_DT, PLANE_DT, CONE_DT, CYLINDER_DT, PATHL_DT, POINT_PCA_DT, LINE_PCA_DT, UNDEFINED_DT }

enum	Fancy { HEL_AS_F =0, HEL_ALL_F, POL_1_F, POL_2_F, POL_M_F }

enum	Pars { RADIUS_P =0, Z_P = 0, PATHL_P = 0 }

typedef CLHEP::Hep3Vector	Point

typedef SteppingHelixStateInfo::Result	Result

typedef SteppingHelixStateInfo	StateInfo

typedef CLHEP::Hep3Vector	Vector

Public Member Functions
void	applyRadX0Correction (bool applyRadX0Correction)

virtual SteppingHelixPropagator *	clone () const override

virtual const MagneticField *	magneticField () const override

void	propagate (const SteppingHelixStateInfo &ftsStart, const Surface &sDest, SteppingHelixStateInfo &out) const
	Propagate to Plane given a starting point. More...

void	propagate (const SteppingHelixStateInfo &ftsStart, const Plane &pDest, SteppingHelixStateInfo &out) const

void	propagate (const SteppingHelixStateInfo &ftsStart, const Cylinder &cDest, SteppingHelixStateInfo &out) const
	Propagate to Cylinder given a starting point (a Cylinder is assumed to be positioned at 0,0,0) More...

void	propagate (const SteppingHelixStateInfo &ftsStart, const GlobalPoint &pDest, SteppingHelixStateInfo &out) const
	Propagate to PCA to point given a starting point. More...

void	propagate (const SteppingHelixStateInfo &ftsStart, const GlobalPoint &pDest1, const GlobalPoint &pDest2, SteppingHelixStateInfo &out) const
	Propagate to PCA to a line (given by 2 points) given a starting point. More...

virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const Plane &pDest) const override

virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const Cylinder &cDest) const override

virtual std::pair < FreeTrajectoryState, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest) const override
	Propagate to PCA to point given a starting point. More...

virtual std::pair < FreeTrajectoryState, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest1, const GlobalPoint &pDest2) const override
	Propagate to PCA to a line (given by 2 points) given a starting point. More...

virtual std::pair < FreeTrajectoryState, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const reco::BeamSpot &beamSpot) const override
	Propagate to PCA to a line (given by beamSpot position and slope) given a starting point. More...

void	setDebug (bool debug)
	Switch debug printouts (to cout) .. very verbose. More...

void	setEndcapShiftsInZPosNeg (double valPos, double valNeg)
	set shifts in Z for endcap pieces (includes EE, HE, ME, YE) More...

void	setMaterialMode (bool noMaterial)
	Switch for material effects mode: no material effects if true. More...

void	setNoErrorPropagation (bool noErrorPropagation)
	Force no error propagation. More...

void	setReturnTangentPlane (bool val)
	flag to return tangent plane for non-plane input More...

void	setSendLogWarning (bool val)
	flag to send LogWarning on failures More...

void	setUseInTeslaFromMagField (bool val)
	force getting field value from MagneticField, not the geometric one More...

void	setUseIsYokeFlag (bool val)

void	setUseMagVolumes (bool val)
	Switch to using MagneticField Volumes .. as in VolumeBasedMagneticField. More...

void	setUseMatVolumes (bool val)
	Switch to using Material Volumes .. internally defined for now. More...

void	setUseTuningForL2Speed (bool val)

void	setVBFPointer (const VolumeBasedMagneticField *val)

	SteppingHelixPropagator ()
	Constructors. More...

	SteppingHelixPropagator (const MagneticField *field, PropagationDirection dir=alongMomentum)

virtual	~SteppingHelixPropagator ()
	Destructor. More...

Public Member Functions inherited from Propagator
virtual FreeTrajectoryState	propagate (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest) const final

virtual FreeTrajectoryState	propagate (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest1, const GlobalPoint &pDest2) const final

virtual FreeTrajectoryState	propagate (const FreeTrajectoryState &ftsStart, const reco::BeamSpot &beamSpot) const final

virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const FreeTrajectoryState &, const Surface &) const final

virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const TrajectoryStateOnSurface &tsos, const Surface &sur) const final

virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const TrajectoryStateOnSurface &tsos, const Plane &sur) const

virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const TrajectoryStateOnSurface &tsos, const Cylinder &sur) const

virtual PropagationDirection	propagationDirection () const

	Propagator (PropagationDirection dir=alongMomentum)

virtual bool	setMaxDirectionChange (float phiMax)

virtual void	setPropagationDirection (PropagationDirection dir)

virtual	~Propagator ()

Protected Types
typedef SteppingHelixStateInfo::VolumeBounds	MatBounds

typedef StateInfo	StateArray [MAX_POINTS+1]

Protected Member Functions
int	cIndex_ (int ind) const
	(Internals) circular index for array of transients More...

double	getDeDx (const SteppingHelixPropagator::StateInfo &sv, double &dEdXPrime, double &radX0, MatBounds &rzLims) const
	estimate average (in fact smth. close to MPV and median) energy loss per unit path length More...

void	getNextState (const SteppingHelixPropagator::StateInfo &svPrevious, SteppingHelixPropagator::StateInfo &svNext, double dP, const SteppingHelixPropagator::Vector &tau, const SteppingHelixPropagator::Vector &drVec, double dS, double dX0, const AlgebraicMatrix55 &dCovCurv) const

void	initStateArraySHPSpecific (StateArray &svBuf, bool flagsOnly) const
	(Internals) set defaults needed for states used inside propagate methods More...

bool	isYokeVolume (const MagVolume *vol) const
	check if it's a yoke/iron based on this MagVol internals More...

void	loadState (SteppingHelixPropagator::StateInfo &svCurrent, const SteppingHelixPropagator::Vector &p3, const SteppingHelixPropagator::Point &r3, int charge, PropagationDirection dir, const AlgebraicSymMatrix55 &covCurv) const

bool	makeAtomStep (SteppingHelixPropagator::StateInfo &svCurrent, SteppingHelixPropagator::StateInfo &svNext, double dS, PropagationDirection dir, SteppingHelixPropagator::Fancy fancy) const
	main stepping function: compute next state vector after a step of length dS More...

Result	propagate (StateArray &svBuff, int &nPoints, SteppingHelixPropagator::DestType type, const double pars[6], double epsilon=1e-3) const

Result	refToDest (DestType dest, const SteppingHelixPropagator::StateInfo &sv, const double pars[6], double &dist, double &tanDist, PropagationDirection &refDirection, double fastSkipDist=1e12) const
	(Internals) determine distance and direction from the current position to the plane More...

Result	refToMagVolume (const SteppingHelixPropagator::StateInfo &sv, PropagationDirection dir, double &dist, double &tanDist, double fastSkipDist=1e12, bool expectNewMagVolume=false, double maxStep=1e12) const

Result	refToMatVolume (const SteppingHelixPropagator::StateInfo &sv, PropagationDirection dir, double &dist, double &tanDist, double fastSkipDist=1e12) const

void	setIState (const SteppingHelixStateInfo &sStart, StateArray &svBuff, int &nPoints) const
	(Internals) Init starting point More...

void	setRep (SteppingHelixPropagator::Basis &rep, const SteppingHelixPropagator::Vector &tau) const
	Set/compute basis vectors for local coordinates at current step (called by incrementState) More...

Static Protected Attributes
static const int	MAX_POINTS = 7

Private Types
typedef std::pair < FreeTrajectoryState, double >	FtsPP

typedef std::pair < TrajectoryStateOnSurface, double >	TsosPP

Private Attributes
bool	applyRadX0Correction_

bool	debug_

double	defaultStep_

double	ecShiftNeg_

double	ecShiftPos_

const MagneticField *	field_

StateInfo	invalidState_

bool	noErrorPropagation_

bool	noMaterialMode_

bool	returnTangentPlane_

bool	sendLogWarning_

const AlgebraicSymMatrix55	unit55_

bool	useInTeslaFromMagField_

bool	useIsYokeFlag_

bool	useMagVolumes_

bool	useMatVolumes_

bool	useTuningForL2Speed_

const VolumeBasedMagneticField *	vbField_

Static Private Attributes
static const int	MAX_STEPS = 10000

Detailed Description

Propagator implementation using steps along a helix. Minimal geometry navigation. Material effects (multiple scattering and energy loss) are based on tuning to MC and (eventually) data.

Author: Vyacheslav Krutelyov (slava77)

Propagator implementation using steps along a helix. Minimal geometry navigation. Material effects (multiple scattering and energy loss) are based on tuning to MC and (eventually) data. Implementation file contents follow.

Author: Vyacheslav Krutelyov (slava77)

Definition at line 41 of file SteppingHelixPropagator.h.

Member Typedef Documentation

typedef std::pair<FreeTrajectoryState, double> SteppingHelixPropagator::FtsPP

private

Definition at line 260 of file SteppingHelixPropagator.h.

typedef SteppingHelixStateInfo::VolumeBounds SteppingHelixPropagator::MatBounds

protected

Definition at line 185 of file SteppingHelixPropagator.h.

typedef CLHEP::Hep3Vector SteppingHelixPropagator::Point

Definition at line 44 of file SteppingHelixPropagator.h.

typedef SteppingHelixStateInfo::Result SteppingHelixPropagator::Result

Definition at line 47 of file SteppingHelixPropagator.h.

typedef StateInfo SteppingHelixPropagator::StateArray[MAX_POINTS+1]

protected

Definition at line 187 of file SteppingHelixPropagator.h.

typedef SteppingHelixStateInfo SteppingHelixPropagator::StateInfo

Definition at line 46 of file SteppingHelixPropagator.h.

typedef std::pair<TrajectoryStateOnSurface, double> SteppingHelixPropagator::TsosPP

private

Definition at line 259 of file SteppingHelixPropagator.h.

typedef CLHEP::Hep3Vector SteppingHelixPropagator::Vector

Definition at line 43 of file SteppingHelixPropagator.h.

Member Enumeration Documentation

enum SteppingHelixPropagator::DestType

Enumerator
RADIUS_DT
Z_DT
PLANE_DT
CONE_DT
CYLINDER_DT
PATHL_DT
POINT_PCA_DT
LINE_PCA_DT
UNDEFINED_DT

Definition at line 61 of file SteppingHelixPropagator.h.

                 {
     RADIUS_DT=0,
     Z_DT,
     PLANE_DT,
     CONE_DT,
     CYLINDER_DT,
     PATHL_DT,
     POINT_PCA_DT,
     LINE_PCA_DT,
     UNDEFINED_DT
   };

enum SteppingHelixPropagator::Fancy

Enumerator
HEL_AS_F
HEL_ALL_F
POL_1_F
POL_2_F
POL_M_F

Definition at line 73 of file SteppingHelixPropagator.h.

              {
     HEL_AS_F=0, //simple analytical helix, eloss at end of step
     HEL_ALL_F,  //analytical helix with linear eloss
     POL_1_F, //1st order approximation, straight line
     POL_2_F,//2nd order
     POL_M_F //highest available
   };

enum SteppingHelixPropagator::Pars

Enumerator
RADIUS_P
Z_P
PATHL_P

Definition at line 55 of file SteppingHelixPropagator.h.

             {
     RADIUS_P=0,
     Z_P = 0,
     PATHL_P = 0
   };

Constructor & Destructor Documentation

SteppingHelixPropagator::SteppingHelixPropagator ( )

Constructors.

Definition at line 60 of file SteppingHelixPropagator.cc.

References field_.

Referenced by clone().

                                                  :
   Propagator(anyDirection)
 {
   field_ = 0;
 }

SteppingHelixPropagator::SteppingHelixPropagator	(	const MagneticField *	field,
		PropagationDirection	dir = `alongMomentum`
	)

Definition at line 66 of file SteppingHelixPropagator.cc.

References applyRadX0Correction_, debug_, defaultStep_, ecShiftNeg_, ecShiftPos_, field_, noErrorPropagation_, noMaterialMode_, returnTangentPlane_, sendLogWarning_, useInTeslaFromMagField_, useIsYokeFlag_, useMagVolumes_, useMatVolumes_, useTuningForL2Speed_, and vbField_.

                                                   :
   Propagator(dir),
   unit55_(AlgebraicMatrixID())
 {
   field_ = field;
   vbField_ = dynamic_cast<const VolumeBasedMagneticField*>(field_);
   debug_ = false;
   noMaterialMode_ = false;
   noErrorPropagation_ = false;
   applyRadX0Correction_ = true;
   useMagVolumes_ = true;
   useIsYokeFlag_ = true;
   useMatVolumes_ = true;
   useInTeslaFromMagField_ = false; //overrides behavior only if true
   returnTangentPlane_ = true;
   sendLogWarning_ = false;
   useTuningForL2Speed_ = false;
   defaultStep_ = 5.;
 
   ecShiftPos_ = 0;
   ecShiftNeg_ = 0;
 
 }

SteppingHelixPropagator::~SteppingHelixPropagator ( )

virtual

Destructor.

Definition at line 57 of file SteppingHelixPropagator.cc.

57 {}

Member Function Documentation

void SteppingHelixPropagator::applyRadX0Correction ( bool applyRadX0Correction )

inline

Apply radLength correction (1+0.036*ln(radX0+1)) to covariance matrix +1 is added for IR-safety Should be done with care: it's easy to make the end-point result dependent on the intermediate stop points

Definition at line 149 of file SteppingHelixPropagator.h.

References applyRadX0Correction(), and applyRadX0Correction_.

Referenced by applyRadX0Correction(), TrackDetectorAssociator::init(), HTrackAssociator::init(), SteppingHelixPropagatorESProducer::produce(), and AlCaHOCalibProducer::produce().

149 { applyRadX0Correction_ = applyRadX0Correction;}

SteppingHelixPropagator::applyRadX0Correction_

bool applyRadX0Correction_

Definition: SteppingHelixPropagator.h:273

SteppingHelixPropagator::applyRadX0Correction

void applyRadX0Correction(bool applyRadX0Correction)

Definition: SteppingHelixPropagator.h:149

int SteppingHelixPropagator::cIndex_ ( int ind ) const

protected

(Internals) circular index for array of transients

Definition at line 1658 of file SteppingHelixPropagator.cc.

References MAX_POINTS, and query::result.

Referenced by propagate(), and setIState().

                                                  {
   int result = ind%MAX_POINTS;  
   if (ind != 0 && result == 0){
     result = MAX_POINTS;
   }
   return result;
 }

virtual SteppingHelixPropagator* SteppingHelixPropagator::clone ( void ) const

inlineoverridevirtual

Implements Propagator.

Definition at line 85 of file SteppingHelixPropagator.h.

References SteppingHelixPropagator().

85 {return new SteppingHelixPropagator(*this);}

SteppingHelixPropagator::SteppingHelixPropagator

SteppingHelixPropagator()

Constructors.

Definition: SteppingHelixPropagator.cc:60

double SteppingHelixPropagator::getDeDx	(	const SteppingHelixPropagator::StateInfo &	sv,
		double &	dEdXPrime,
		double &	radX0,
		MatBounds &	rzLims
	)		const

protected

estimate average (in fact smth. close to MPV and median) energy loss per unit path length

Definition at line 1298 of file SteppingHelixPropagator.cc.

References SteppingHelixStateInfo::bf, alignCSCRings::e, ecShiftNeg_, ecShiftPos_, SteppingHelixStateInfo::isYokeVol, fff_deleter::log, SteppingHelixStateInfo::magVol, noMaterialMode_, SteppingHelixStateInfo::p3, SteppingHelixStateInfo::r3, mathSSE::sqrt(), useIsYokeFlag_, and useMagVolumes_.

Referenced by getNextState(), loadState(), and makeAtomStep().

                                             {
   radX0 = 1.e24;
   dEdXPrime = 0.;
   rzLims = MatBounds();
   if (noMaterialMode_) return 0;
 
   double dEdx = 0.;
 
   double lR = sv.r3.perp();
   double lZ = fabs(sv.r3.z());
 
   //assume "Iron" .. seems to be quite the same for brass/iron/PbW04
   //good for Fe within 3% for 0.2 GeV to 10PeV
 
   double dEdX_HCal = 0.95; //extracted from sim
   double dEdX_ECal = 0.45;
   double dEdX_coil = 0.35; //extracted from sim .. closer to 40% in fact
   double dEdX_Fe =   1;
   double dEdX_MCh =  0.053; //chambers on average
   double dEdX_Trk =  0.0114;
   double dEdX_Air =  2E-4;
   double dEdX_Vac =  0.0;
 
   double radX0_HCal = 1.44/0.8; //guessing
   double radX0_ECal = 0.89/0.7;
   double radX0_coil = 4.; //
   double radX0_Fe =   1.76;
   double radX0_MCh =  1e3; //
   double radX0_Trk =  320.;
   double radX0_Air =  3.e4;
   double radX0_Vac =  3.e9; //"big" number for vacuum
 
 
   //not all the boundaries are set below: this will be a default
   if (! (lR < 380 && lZ < 785)){
     if (lZ > 785 ) rzLims = MatBounds(0, 1e4, 785, 1e4);
     if (lZ < 785 ) rzLims = MatBounds(380, 1e4, 0, 785);
   }
 
   //this def makes sense assuming we don't jump into endcap volume from the other z-side in one step
   //also, it is a positive shift only (at least for now): can't move ec further into the detector
   double ecShift = sv.r3.z() > 0 ? fabs(ecShiftPos_) : fabs(ecShiftNeg_); 
 
   //this should roughly figure out where things are 
   //(numbers taken from Fig1.1.2 TDR and from geom xmls)
   if (lR < 2.9){ //inside beampipe
     dEdx = dEdX_Vac; radX0 = radX0_Vac;
     rzLims = MatBounds(0, 2.9, 0, 1E4);
   }
   else if (lR < 129){
     if (lZ < 294){ 
       rzLims = MatBounds(2.9, 129, 0, 294); //tracker boundaries
       dEdx = dEdX_Trk; radX0 = radX0_Trk; 
       //somewhat empirical formula that ~ matches the average if going from 0,0,0
       //assuming "uniform" tracker material
       //doesn't really track material layer to layer
       double lEtaDet = fabs(sv.r3.eta());
       double scaleRadX = lEtaDet > 1.5 ? 0.7724 : 1./cosh(0.5*lEtaDet);//sin(2.*atan(exp(-0.5*lEtaDet)));
       scaleRadX *= scaleRadX;
       if (lEtaDet > 2 && lZ > 20) scaleRadX *= (lEtaDet-1.);
       if (lEtaDet > 2.5 && lZ > 20) scaleRadX *= (lEtaDet-1.);
       radX0 *= scaleRadX;
     }
     //endcap part begins here
     else if ( lZ < 294 + ecShift ){
       //gap in front of EE here, piece inside 2.9<R<129
       rzLims = MatBounds(2.9, 129, 294, 294 + ecShift); 
       dEdx = dEdX_Air; radX0 = radX0_Air;
     }
     else if (lZ < 372 + ecShift){ 
       rzLims = MatBounds(2.9, 129, 294 + ecShift, 372 + ecShift); //EE here, piece inside 2.9<R<129
       dEdx = dEdX_ECal; radX0 = radX0_ECal; 
     }//EE averaged out over a larger space
     else if (lZ < 398 + ecShift){
       rzLims = MatBounds(2.9, 129, 372 + ecShift, 398 + ecShift); //whatever goes behind EE 2.9<R<129 is air up to Z=398
       dEdx = dEdX_HCal*0.05; radX0 = radX0_Air; 
     }//betw EE and HE
     else if (lZ < 555 + ecShift){ 
       rzLims = MatBounds(2.9, 129, 398 + ecShift, 555 + ecShift); //HE piece 2.9<R<129; 
       dEdx = dEdX_HCal*0.96; radX0 = radX0_HCal/0.96; 
     } //HE calor abit less dense
     else {
       //      rzLims = MatBounds(2.9, 129, 555, 785);
       // set the boundaries first: they serve as stop-points here
       // the material is set below
       if (lZ < 568  + ecShift) rzLims = MatBounds(2.9, 129, 555 + ecShift, 568 + ecShift); //a piece of HE support R<129, 555<Z<568
       else if (lZ < 625 + ecShift){
     if (lR < 85 + ecShift) rzLims = MatBounds(2.9, 85, 568 + ecShift, 625 + ecShift); 
     else rzLims = MatBounds(85, 129, 568 + ecShift, 625 + ecShift);
       } else if (lZ < 785 + ecShift) rzLims = MatBounds(2.9, 129, 625 + ecShift, 785 + ecShift);
       else if (lZ < 1500 + ecShift)  rzLims = MatBounds(2.9, 129, 785 + ecShift, 1500 + ecShift);
       else rzLims = MatBounds(2.9, 129, 1500 + ecShift, 1E4);
 
       //iron .. don't care about no material in front of HF (too forward)
       if (! (lZ > 568 + ecShift && lZ < 625 + ecShift && lR > 85 ) // HE support 
       && ! (lZ > 785 + ecShift && lZ < 850 + ecShift && lR > 118)) {dEdx = dEdX_Fe; radX0 = radX0_Fe; }
       else  { dEdx = dEdX_MCh; radX0 = radX0_MCh; } //ME at eta > 2.2
     }
   }
   else if (lR < 287){
     if (lZ < 372 + ecShift && lR < 177){ // 129<<R<177
       if (lZ < 304) rzLims = MatBounds(129, 177, 0, 304); //EB  129<<R<177 0<Z<304
       else if (lZ < 343){ // 129<<R<177 304<Z<343
     if (lR < 135 ) rzLims = MatBounds(129, 135, 304, 343);// tk piece 129<<R<135 304<Z<343
     else if (lR < 172 ){ //
       if (lZ < 311 ) rzLims = MatBounds(135, 172, 304, 311);
       else rzLims = MatBounds(135, 172, 311, 343);
     } else {
       if (lZ < 328) rzLims = MatBounds(172, 177, 304, 328);
       else rzLims = MatBounds(172, 177, 328, 343);
     }
       }
       else if ( lZ < 343 + ecShift){
     rzLims = MatBounds(129, 177, 343, 343 + ecShift); //gap
       }
       else {
     if (lR < 156 ) rzLims = MatBounds(129, 156, 343 + ecShift, 372 + ecShift);
     else if ( (lZ - 343 - ecShift) > (lR - 156)*1.38 ) 
       rzLims = MatBounds(156, 177, 127.72 + ecShift, 372 + ecShift, atan(1.38), 0);
     else rzLims = MatBounds(156, 177, 343 + ecShift, 127.72 + ecShift, 0, atan(1.38));
       }
 
       if (!(lR > 135 && lZ <343 + ecShift && lZ > 304 )
       && ! (lR > 156 && lZ < 372 + ecShift  && lZ > 343 + ecShift  && ((lZ-343. - ecShift )< (lR-156.)*1.38)))
     {
       //the crystals are the same length, but they are not 100% of material
       double cosThetaEquiv = 0.8/sqrt(1.+lZ*lZ/lR/lR) + 0.2;
       if (lZ > 343) cosThetaEquiv = 1.;
       dEdx = dEdX_ECal*cosThetaEquiv; radX0 = radX0_ECal/cosThetaEquiv; 
     } //EB
       else { 
     if ( (lZ > 304 && lZ < 328 && lR < 177 && lR > 135) 
          && ! (lZ > 311 && lR < 172) ) {dEdx = dEdX_Fe; radX0 = radX0_Fe; } //Tk_Support
     else if ( lZ > 343 && lZ < 343 + ecShift) { dEdx = dEdX_Air; radX0 = radX0_Air; }
     else {dEdx = dEdX_ECal*0.2; radX0 = radX0_Air;} //cables go here <-- will be abit too dense for ecShift > 0
       }
     }
     else if (lZ < 554 + ecShift){ // 129<R<177 372<Z<554  AND 177<R<287 0<Z<554
       if (lR < 177){ //  129<R<177 372<Z<554
     if ( lZ > 372 + ecShift && lZ < 398 + ecShift )rzLims = MatBounds(129, 177, 372 + ecShift, 398 + ecShift); // EE 129<R<177 372<Z<398
     else if (lZ < 548 + ecShift) rzLims = MatBounds(129, 177, 398 + ecShift, 548 + ecShift); // HE 129<R<177 398<Z<548
     else rzLims = MatBounds(129, 177, 548 + ecShift, 554 + ecShift); // HE gap 129<R<177 548<Z<554
       }
       else if (lR < 193){ // 177<R<193 0<Z<554
     if ((lZ - 307) < (lR - 177.)*1.739) rzLims = MatBounds(177, 193, 0, -0.803, 0, atan(1.739));
     else if ( lZ < 389)  rzLims = MatBounds(177, 193, -0.803, 389, atan(1.739), 0.);
     else if ( lZ < 389 + ecShift)  rzLims = MatBounds(177, 193, 389, 389 + ecShift); // air insert
     else if ( lZ < 548 + ecShift ) rzLims = MatBounds(177, 193, 389 + ecShift, 548 + ecShift);// HE 177<R<193 389<Z<548
     else rzLims = MatBounds(177, 193, 548 + ecShift, 554 + ecShift); // HE gap 177<R<193 548<Z<554
       }
       else if (lR < 264){ // 193<R<264 0<Z<554
     double anApex = 375.7278 - 193./1.327; // 230.28695599096
     if ( (lZ - 375.7278) < (lR - 193.)/1.327) rzLims = MatBounds(193, 264, 0, anApex, 0, atan(1./1.327)); //HB
     else if ( (lZ - 392.7278 ) < (lR - 193.)/1.327) 
       rzLims = MatBounds(193, 264, anApex, anApex+17., atan(1./1.327), atan(1./1.327)); // HB-HE gap
     else if ( (lZ - 392.7278 - ecShift ) < (lR - 193.)/1.327) 
       rzLims = MatBounds(193, 264, anApex+17., anApex+17. + ecShift, atan(1./1.327), atan(1./1.327)); // HB-HE gap air insert
     // HE (372,193)-(517,193)-(517,264)-(417.8,264)
     else if ( lZ < 517 + ecShift ) rzLims = MatBounds(193, 264, anApex+17. + ecShift, 517 + ecShift, atan(1./1.327), 0);
     else if (lZ < 548 + ecShift){ // HE+gap 193<R<264 517<Z<548
       if (lR < 246 ) rzLims = MatBounds(193, 246, 517 + ecShift, 548 + ecShift); // HE 193<R<246 517<Z<548
       else rzLims = MatBounds(246, 264, 517 + ecShift, 548 + ecShift); // HE gap 246<R<264 517<Z<548
     } 
     else rzLims = MatBounds(193, 264, 548 + ecShift, 554 + ecShift); // HE gap  193<R<246 548<Z<554
       }
       else if ( lR < 275){ // 264<R<275 0<Z<554
     if (lZ < 433) rzLims = MatBounds(264, 275, 0, 433); //HB
     else if (lZ < 554 ) rzLims = MatBounds(264, 275, 433, 554); // HE gap 264<R<275 433<Z<554
     else rzLims = MatBounds(264, 275, 554, 554 + ecShift); // HE gap 264<R<275 554<Z<554 air insert
       }
       else { // 275<R<287 0<Z<554
     if (lZ < 402) rzLims = MatBounds(275, 287, 0, 402);// HB 275<R<287 0<Z<402
     else if (lZ < 554) rzLims = MatBounds(275, 287, 402, 554);//  //HE gap 275<R<287 402<Z<554
     else rzLims = MatBounds(275, 287, 554, 554 + ecShift); //HE gap 275<R<287 554<Z<554 air insert
       }
 
       if ((lZ < 433 || lR < 264) && (lZ < 402 || lR < 275) && (lZ < 517 + ecShift || lR < 246) //notches
       //I should've made HE and HF different .. now need to shorten HE to match
       && lZ < 548 + ecShift
       && ! (lZ < 389 + ecShift && lZ > 335 && lR < 193 ) //not a gap EB-EE 129<R<193
       && ! (lZ > 307 && lZ < 335 && lR < 193 && ((lZ - 307) > (lR - 177.)*1.739)) //not a gap 
       && ! (lR < 177 && lZ < 398 + ecShift) //under the HE nose
       && ! (lR < 264 && lR > 193 && fabs(441.5+0.5*ecShift - lZ + (lR - 269.)/1.327) < (8.5 + ecShift*0.5)) ) //not a gap
     { dEdx = dEdX_HCal; radX0 = radX0_HCal; //hcal
     }
       else if( (lR < 193 && lZ > 389 && lZ < 389 + ecShift ) || (lR > 264 && lR < 287 && lZ > 554 && lZ < 554 + ecShift)
            ||(lR < 264 && lR > 193 && fabs(441.5+8.5+0.5*ecShift - lZ + (lR - 269.)/1.327) < ecShift*0.5) )  {
     dEdx = dEdX_Air; radX0 = radX0_Air; 
       }
       else {dEdx = dEdX_HCal*0.05; radX0 = radX0_Air; }//endcap gap
     }
     //the rest is a tube of endcap volume  129<R<251 554<Z<largeValue
     else if (lZ < 564 + ecShift){ // 129<R<287  554<Z<564
       if (lR < 251) {
     rzLims = MatBounds(129, 251, 554 + ecShift, 564 + ecShift);  // HE support 129<R<251  554<Z<564    
     dEdx = dEdX_Fe; radX0 = radX0_Fe; 
       }//HE support
       else { 
     rzLims = MatBounds(251, 287, 554 + ecShift, 564 + ecShift); //HE/ME gap 251<R<287  554<Z<564    
     dEdx = dEdX_MCh; radX0 = radX0_MCh; 
       }
     }
     else if (lZ < 625 + ecShift){ // ME/1/1 129<R<287  564<Z<625
       rzLims = MatBounds(129, 287, 564 + ecShift, 625 + ecShift);      
       dEdx = dEdX_MCh; radX0 = radX0_MCh; 
     }
     else if (lZ < 785 + ecShift){ //129<R<287  625<Z<785
       if (lR < 275) rzLims = MatBounds(129, 275, 625 + ecShift, 785 + ecShift); //YE/1 129<R<275 625<Z<785
       else { // 275<R<287  625<Z<785
     if (lZ < 720 + ecShift) rzLims = MatBounds(275, 287, 625 + ecShift, 720 + ecShift); // ME/1/2 275<R<287  625<Z<720
     else rzLims = MatBounds(275, 287, 720 + ecShift, 785 + ecShift); // YE/1 275<R<287  720<Z<785
       }
       if (! (lR > 275 && lZ < 720 + ecShift)) { dEdx = dEdX_Fe; radX0 = radX0_Fe; }//iron
       else { dEdx = dEdX_MCh; radX0 = radX0_MCh; }
     }
     else if (lZ < 850 + ecShift){
       rzLims = MatBounds(129, 287, 785 + ecShift, 850 + ecShift);
       dEdx = dEdX_MCh; radX0 = radX0_MCh; 
     }
     else if (lZ < 910 + ecShift){
       rzLims = MatBounds(129, 287, 850 + ecShift, 910 + ecShift);
       dEdx = dEdX_Fe; radX0 = radX0_Fe; 
     }//iron
     else if (lZ < 975 + ecShift){
       rzLims = MatBounds(129, 287, 910 + ecShift, 975 + ecShift);
       dEdx = dEdX_MCh; radX0 = radX0_MCh; 
     }
     else if (lZ < 1000 + ecShift){
       rzLims = MatBounds(129, 287, 975 + ecShift, 1000 + ecShift);
       dEdx = dEdX_Fe; radX0 = radX0_Fe; 
     }//iron
     else if (lZ < 1063 + ecShift){
       rzLims = MatBounds(129, 287, 1000 + ecShift, 1063 + ecShift);
       dEdx = dEdX_MCh; radX0 = radX0_MCh; 
     }
     else if ( lZ < 1073 + ecShift){
       rzLims = MatBounds(129, 287, 1063 + ecShift, 1073 + ecShift);
       dEdx = dEdX_Fe; radX0 = radX0_Fe; 
     }
     else if (lZ < 1E4 )  { 
       rzLims = MatBounds(129, 287, 1073 + ecShift, 1E4);
       dEdx = dEdX_Air; radX0 = radX0_Air;
     }
     else { 
       
       dEdx = dEdX_Air; radX0 = radX0_Air;
     }
   }
   else if (lR <380 && lZ < 667){
     if (lZ < 630){
       if (lR < 315) rzLims = MatBounds(287, 315, 0, 630); 
       else if (lR < 341 ) rzLims = MatBounds(315, 341, 0, 630); //b-field ~linear rapid fall here
       else rzLims = MatBounds(341, 380, 0, 630);      
     } else rzLims = MatBounds(287, 380, 630, 667);  
 
     if (lZ < 630) { dEdx = dEdX_coil; radX0 = radX0_coil; }//a guess for the solenoid average
     else {dEdx = dEdX_Air; radX0 = radX0_Air; }//endcap gap
   }
   else {
     if (lZ < 667) {
       if (lR < 850){
     bool isIron = false;
     //sanity check in addition to flags
     if (useIsYokeFlag_ && useMagVolumes_ && sv.magVol != 0){
       isIron = sv.isYokeVol;
     } else {
       double bMag = sv.bf.mag();
       isIron = (bMag > 0.75 && ! (lZ > 500 && lR <500 && bMag < 1.15)
             && ! (lZ < 450 && lR > 420 && bMag < 1.15 ) );
     }
     //tell the material stepper where mat bounds are
     rzLims = MatBounds(380, 850, 0, 667);
     if (isIron) { dEdx = dEdX_Fe; radX0 = radX0_Fe; }//iron
     else { dEdx = dEdX_MCh; radX0 = radX0_MCh; }
       } else {
     rzLims = MatBounds(850, 1E4, 0, 667);
     dEdx = dEdX_Air; radX0 = radX0_Air; 
       }
     } 
     else if (lR > 750 ){
       rzLims = MatBounds(750, 1E4, 667, 1E4);
       dEdx = dEdX_Air; radX0 = radX0_Air; 
     }
     else if (lZ < 667 + ecShift){
       rzLims = MatBounds(287, 750, 667, 667 + ecShift);
       dEdx = dEdX_Air; radX0 = radX0_Air;       
     }
     //the rest is endcap piece with 287<R<750 Z>667
     else if (lZ < 724 + ecShift){
       if (lR < 380 ) rzLims = MatBounds(287, 380, 667 + ecShift, 724 + ecShift); 
       else rzLims = MatBounds(380, 750, 667 + ecShift, 724 + ecShift); 
       dEdx = dEdX_MCh; radX0 = radX0_MCh; 
     }
     else if (lZ < 785 + ecShift){
       if (lR < 380 ) rzLims = MatBounds(287, 380, 724 + ecShift, 785 + ecShift); 
       else rzLims = MatBounds(380, 750, 724 + ecShift, 785 + ecShift); 
       dEdx = dEdX_Fe; radX0 = radX0_Fe; 
     }//iron
     else if (lZ < 850 + ecShift){
       rzLims = MatBounds(287, 750, 785 + ecShift, 850 + ecShift); 
       dEdx = dEdX_MCh; radX0 = radX0_MCh; 
     }
     else if (lZ < 910 + ecShift){
       rzLims = MatBounds(287, 750, 850 + ecShift, 910 + ecShift); 
       dEdx = dEdX_Fe; radX0 = radX0_Fe; 
     }//iron
     else if (lZ < 975 + ecShift){
       rzLims = MatBounds(287, 750, 910 + ecShift, 975 + ecShift); 
       dEdx = dEdX_MCh; radX0 = radX0_MCh; 
     }
     else if (lZ < 1000 + ecShift){
       rzLims = MatBounds(287, 750, 975 + ecShift, 1000 + ecShift); 
       dEdx = dEdX_Fe; radX0 = radX0_Fe; 
     }//iron
     else if (lZ < 1063 + ecShift){
       if (lR < 360){
     rzLims = MatBounds(287, 360, 1000 + ecShift, 1063 + ecShift);
     dEdx = dEdX_MCh; radX0 = radX0_MCh; 
       } 
       //put empty air where me4/2 should be (future)
       else {
         rzLims = MatBounds(360, 750, 1000 + ecShift, 1063 + ecShift);
         dEdx = dEdX_Air; radX0 = radX0_Air;
       }
     }
     else if ( lZ < 1073 + ecShift){
       rzLims = MatBounds(287, 750, 1063 + ecShift, 1073 + ecShift);
       //this plate does not exist: air
       dEdx = dEdX_Air; radX0 = radX0_Air; 
     }
     else if (lZ < 1E4 )  { 
       rzLims = MatBounds(287, 750, 1073 + ecShift, 1E4);
       dEdx = dEdX_Air; radX0 = radX0_Air;
     }
     else {dEdx = dEdX_Air; radX0 = radX0_Air; }//air
   }
   
   //dEdx so far is a relative number (relative to iron)
   //scale by what's expected for iron (the function was fit from pdg table)
   //0.065 (PDG) --> 0.044 to better match with MPV
   double p0 = sv.p3.mag();
   double logp0 = log(p0);
   double p0powN33 = 0; 
   if (p0>3.) {
     // p0powN33 = exp(-0.33*logp0); //calculate for p>3GeV
     double xx=1./p0; xx=sqrt(sqrt(sqrt(sqrt(xx)))); xx=xx*xx*xx*xx*xx; // this is (p0)**(-5/16), close enough to -0.33
     p0powN33 = xx;
   }
   double dEdX_mat = -(11.4 + 0.96*fabs(logp0+log(2.8)) + 0.033*p0*(1.0 - p0powN33) )*1e-3; 
   //in GeV/cm .. 0.8 to get closer to the median or MPV
 
   dEdXPrime = dEdx == 0 ? 0 : -dEdx*(0.96/p0 + 0.033 - 0.022*p0powN33)*1e-3; //== d(dEdX)/dp
   dEdx *= dEdX_mat;
 
   return dEdx;
 }

void SteppingHelixPropagator::getNextState	(	const SteppingHelixPropagator::StateInfo &	svPrevious,
		SteppingHelixPropagator::StateInfo &	svNext,
		double	dP,
		const SteppingHelixPropagator::Vector &	tau,
		const SteppingHelixPropagator::Vector &	drVec,
		double	dS,
		double	dX0,
		const AlgebraicMatrix55 &	dCovCurv
	)		const

protected

(Internals) compute transients for current point (increments step counter). Called by makeAtomStep

Definition at line 777 of file SteppingHelixPropagator.cc.

Referenced by makeAtomStep().

                                                                         {
   static const std::string metname = "SteppingHelixPropagator";
   svNext.q = svPrevious.q;
   svNext.dir = dS > 0.0 ? 1.: -1.; 
   svNext.p3 = tau;  svNext.p3*=(svPrevious.p3.mag() - svNext.dir*fabs(dP));
 
   svNext.r3 = svPrevious.r3; svNext.r3 += drVec;
 
   svNext.path_ = svPrevious.path() + dS;
   svNext.radPath_ = svPrevious.radPath() + dX0;
 
   GlobalPoint gPointNorZ(svNext.r3.x(), svNext.r3.y(), svNext.r3.z());
 
   GlobalVector bf(0,0,0); 
 
   if (useMagVolumes_){
     if (vbField_ != 0){
       svNext.magVol = vbField_->findVolume(gPointNorZ);
       if (useIsYokeFlag_){
     double curRad = svNext.r3.perp();
     if (curRad > 380 && curRad < 850 && fabs(svNext.r3.z()) < 667){
       svNext.isYokeVol = isYokeVolume(svNext.magVol);
     } else {
       svNext.isYokeVol = false;
     }
       }
     } else {
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Failed to cast into VolumeBasedMagneticField"<<std::endl;
       svNext.magVol = 0;
     }
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Got volume at "<<svNext.magVol<<std::endl;
     }
   }
 
   if (useMagVolumes_ && svNext.magVol != 0 && ! useInTeslaFromMagField_){
     bf = svNext.magVol->inTesla(gPointNorZ);
     svNext.bf.set(bf.x(), bf.y(), bf.z());
   } else {
     GlobalPoint gPoint(svNext.r3.x(), svNext.r3.y(), svNext.r3.z());
     bf = field_->inTesla(gPoint);
     svNext.bf.set(bf.x(), bf.y(), bf.z());
   }
   if (svNext.bf.mag2() < 1e-32) svNext.bf.set(0., 0., 1e-16);
   
   
   double dEdXPrime = 0;
   double dEdx = 0;
   double radX0 = 0;
   MatBounds rzLims;
   dEdx = getDeDx(svNext, dEdXPrime, radX0, rzLims);
   svNext.dEdx = dEdx;    svNext.dEdXPrime = dEdXPrime;
   svNext.radX0 = radX0;
   svNext.rzLims = rzLims;
 
   //update Emat only if it's valid
   svNext.hasErrorPropagated_ = svPrevious.hasErrorPropagated_;
   if (svPrevious.hasErrorPropagated_){
     {
       AlgebraicMatrix55 tmp = dCovCurvTransform*svPrevious.covCurv;
       ROOT::Math::AssignSym::Evaluate(svNext.covCurv, tmp*ROOT::Math::Transpose(dCovCurvTransform));
       
       svNext.covCurv += svPrevious.matDCovCurv;
     }
   } else {
     //could skip dragging along the unprop. cov later .. now
     // svNext.cov = svPrevious.cov;
   }
 
   if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Now at  path: "<<svNext.path()<<" radPath: "<<svNext.radPath()
              <<" p3 "<<" pt: "<<svNext.p3.perp()<<" phi: "<<svNext.p3.phi()
              <<" eta: "<<svNext.p3.eta()
              <<" "<<svNext.p3
              <<" r3: "<<svNext.r3
              <<" dPhi: "<<acos(svNext.p3.unit().dot(svPrevious.p3.unit()))
              <<" bField: "<<svNext.bf.mag()
              <<" dedx: "<<svNext.dEdx
              <<std::endl;
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"New Covariance "<<svNext.covCurv<<std::endl;
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Transf by dCovTransform "<<dCovCurvTransform<<std::endl;
   }
 }

void SteppingHelixPropagator::initStateArraySHPSpecific	(	StateArray &	svBuf,
		bool	flagsOnly
	)		const

protected

(Internals) set defaults needed for states used inside propagate methods

Definition at line 41 of file SteppingHelixPropagator.cc.

References i, MAX_POINTS, and noErrorPropagation_.

Referenced by propagate(), and propagateWithPath().

                                                                                               {
   for (int i = 0; i <= MAX_POINTS; i++){
     svBuf[i].isComplete = true;
     svBuf[i].isValid_ = true;
     svBuf[i].hasErrorPropagated_ = !noErrorPropagation_;
     if (!flagsOnly){
       svBuf[i].p3 = Vector(0,0,0);
       svBuf[i].r3 = Point(0,0,0);
       svBuf[i].bf = Vector(0,0,0);
       svBuf[i].bfGradLoc =  Vector(0,0,0);
       svBuf[i].covCurv = AlgebraicSymMatrix55();
       svBuf[i].matDCovCurv = AlgebraicSymMatrix55();
     }
   }
 }

bool SteppingHelixPropagator::isYokeVolume ( const MagVolume * vol ) const

protected

check if it's a yoke/iron based on this MagVol internals

Definition at line 2279 of file SteppingHelixPropagator.cc.

References debug_, MagVolume::isIron(), LogTrace, metname, GloballyPositioned< T >::position(), query::result, and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by getNextState(), and loadState().

                                                                      {
   static const std::string metname = "SteppingHelixPropagator";
   if (vol == 0) return false;
   /*
   const MFGrid* mGrid = reinterpret_cast<const MFGrid*>(vol->provider());
   std::vector<int> dims(mGrid->dimensions());
   
   LocalVector lVCen(mGrid->nodeValue(dims[0]/2, dims[1]/2, dims[2]/2));
   LocalVector lVZLeft(mGrid->nodeValue(dims[0]/2, dims[1]/2, dims[2]/5));
   LocalVector lVZRight(mGrid->nodeValue(dims[0]/2, dims[1]/2, (dims[2]*4)/5));
 
   double mag2VCen = lVCen.mag2();
   double mag2VZLeft = lVZLeft.mag2();
   double mag2VZRight = lVZRight.mag2();
 
   bool result = false;
   if (mag2VCen > 0.6 && mag2VZLeft > 0.6 && mag2VZRight > 0.6){
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Volume is magnetic, located at "<<vol->position()<<std::endl;    
     result = true;
   } else {
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Volume is not magnetic, located at "<<vol->position()<<std::endl;
   }
 
   */
   bool result = vol->isIron();
   if (result){
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Volume is magnetic, located at "<<vol->position()<<std::endl;
   } else {
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Volume is not magnetic, located at "<<vol->position()<<std::endl;
   }
 
   return result;
 }

void SteppingHelixPropagator::loadState	(	SteppingHelixPropagator::StateInfo &	svCurrent,
		const SteppingHelixPropagator::Vector &	p3,
		const SteppingHelixPropagator::Point &	r3,
		int	charge,
		PropagationDirection	dir,
		const AlgebraicSymMatrix55 &	covCurv
	)		const

protected

(Internals) compute transient values for initial point (resets step counter). Called by setIState

Definition at line 668 of file SteppingHelixPropagator.cc.

Referenced by setIState().

                                                               {
   static const std::string metname = "SteppingHelixPropagator";
 
   svCurrent.q = charge;
   svCurrent.p3 = p3;
   svCurrent.r3 = r3;
   svCurrent.dir = dir == alongMomentum ? 1.: -1.;
 
   svCurrent.path_ = 0; // this could've held the initial path
   svCurrent.radPath_ = 0;
 
   GlobalPoint gPointNorZ(svCurrent.r3.x(), svCurrent.r3.y(), svCurrent.r3.z());
 
   float gpmag = gPointNorZ.mag2();
   float pmag2 = p3.mag2();
   if (gpmag > 1e20f ) {
     LogTrace(metname)<<"Initial point is too far";
     svCurrent.isValid_ = false;
     return;
   }
   if (! (gpmag == gpmag) ) {
     LogTrace(metname)<<"Initial point is a nan";
     edm::LogWarning("SteppingHelixPropagatorNAN")<<"Initial point is a nan";
     svCurrent.isValid_ = false;
     return;
   }
   if (! (pmag2 == pmag2) ) {
     LogTrace(metname)<<"Initial momentum is a nan";
     edm::LogWarning("SteppingHelixPropagatorNAN")<<"Initial momentum is a nan";
     svCurrent.isValid_ = false;
     return;
   }
 
   GlobalVector bf(0,0,0);
   // = field_->inTesla(gPoint);
   if (useMagVolumes_){
     if (vbField_ ){
       svCurrent.magVol = vbField_->findVolume(gPointNorZ);
       if (useIsYokeFlag_){
     double curRad = svCurrent.r3.perp();
     if (curRad > 380 && curRad < 850 && fabs(svCurrent.r3.z()) < 667){
       svCurrent.isYokeVol = isYokeVolume(svCurrent.magVol);
     } else {
       svCurrent.isYokeVol = false;
     }
       }
     } else {
       edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Failed to cast into VolumeBasedMagneticField: fall back to the default behavior"<<std::endl;
       svCurrent.magVol = 0;
     }
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Got volume at "<<svCurrent.magVol<<std::endl;
     }
   }
   
   if (useMagVolumes_ && svCurrent.magVol != 0 && ! useInTeslaFromMagField_){
     bf = svCurrent.magVol->inTesla(gPointNorZ);
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Loaded bfield float: "<<bf
                <<" at global float "<< gPointNorZ<<" double "<< svCurrent.r3<<std::endl;
       LocalPoint lPoint(svCurrent.magVol->toLocal(gPointNorZ));
       LocalVector lbf = svCurrent.magVol->fieldInTesla(lPoint);
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"\t cf in local locF: "<<lbf<<" at "<<lPoint<<std::endl;
     }
     svCurrent.bf.set(bf.x(), bf.y(), bf.z());
   } else {
     GlobalPoint gPoint(r3.x(), r3.y(), r3.z());
     bf = field_->inTesla(gPoint);
     svCurrent.bf.set(bf.x(), bf.y(), bf.z());
   }
   if (svCurrent.bf.mag2() < 1e-32) svCurrent.bf.set(0., 0., 1e-16);
   if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific
              <<"Loaded bfield double: "<<svCurrent.bf<<"  from float: "<<bf
              <<" at float "<< gPointNorZ<<" double "<< svCurrent.r3<<std::endl;
   }
 
 
 
   double dEdXPrime = 0;
   double dEdx = 0;
   double radX0 = 0;
   MatBounds rzLims;
   dEdx = getDeDx(svCurrent, dEdXPrime, radX0, rzLims);
   svCurrent.dEdx = dEdx;    svCurrent.dEdXPrime = dEdXPrime;
   svCurrent.radX0 = radX0;
   svCurrent.rzLims = rzLims;
 
   svCurrent.covCurv =covCurv;
 
   svCurrent.isComplete = true;
   svCurrent.isValid_ = true;
 
   if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Loaded at  path: "<<svCurrent.path()<<" radPath: "<<svCurrent.radPath()
              <<" p3 "<<" pt: "<<svCurrent.p3.perp()<<" phi: "<<svCurrent.p3.phi()
              <<" eta: "<<svCurrent.p3.eta()
              <<" "<<svCurrent.p3
              <<" r3: "<<svCurrent.r3
              <<" bField: "<<svCurrent.bf.mag()
              <<std::endl;
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Input Covariance in Curvilinear RF "<<covCurv<<std::endl;
   }
 }

virtual const MagneticField* SteppingHelixPropagator::magneticField ( ) const

inlineoverridevirtual

Implements Propagator.

Definition at line 90 of file SteppingHelixPropagator.h.

References field_.

90 { return field_;}

SteppingHelixPropagator::field_

const MagneticField * field_

Definition: SteppingHelixPropagator.h:267

bool SteppingHelixPropagator::makeAtomStep	(	SteppingHelixPropagator::StateInfo &	svCurrent,
		SteppingHelixPropagator::StateInfo &	svNext,
		double	dS,
		PropagationDirection	dir,
		SteppingHelixPropagator::Fancy	fancy
	)		const

protected

main stepping function: compute next state vector after a step of length dS

Definition at line 873 of file SteppingHelixPropagator.cc.

Referenced by propagate().

                                                                 {
   static const std::string metname = "SteppingHelixPropagator";
   if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Make atom step "<<svCurrent.path()<<" with step "<<dS<<" in direction "<<dir<<std::endl;
   }
 
   AlgebraicMatrix55 dCCurvTransform(unit55_);
 
   double dP = 0;
   double curP = svCurrent.p3.mag();
   Vector tau = svCurrent.p3; tau *= 1./curP;
   Vector tauNext(tau);
   Vector drVec(0,0,0);
 
   dS = dir == alongMomentum ? fabs(dS) : -fabs(dS);
 
 
   double radX0 = 1e24;
 
   switch (fancy){
   case HEL_AS_F:
   case HEL_ALL_F:{
     double p0 = curP;// see above = svCurrent.p3.mag();
     double p0Inv = 1./p0;
     double b0 = svCurrent.bf.mag();
 
     //get to the mid-point first
     double phi = (2.99792458e-3*svCurrent.q*b0*p0Inv)*dS/2.;
     bool phiSmall = fabs(phi) < 1e-4;
 
     double cosPhi = 0;
     double sinPhi = 0;
 
     double oneLessCosPhi=0;
     double oneLessCosPhiOPhi=0;
     double sinPhiOPhi=0;
     double phiLessSinPhiOPhi=0;
 
     if (phiSmall){
       double phi2 = phi*phi;
       double phi3 = phi2*phi;
       double phi4 = phi3*phi;
       sinPhi = phi - phi3/6. + phi4*phi/120.;
       cosPhi = 1. -phi2/2. + phi4/24.;
       oneLessCosPhi = phi2/2. - phi4/24. + phi2*phi4/720.; // 0.5*phi*phi;//*(1.- phi*phi/12.);
       oneLessCosPhiOPhi = 0.5*phi - phi3/24. + phi2*phi3/720.;//*(1.- phi*phi/12.);
       sinPhiOPhi = 1. - phi*phi/6. + phi4/120.;
       phiLessSinPhiOPhi = phi*phi/6. - phi4/120. + phi4*phi2/5040.;//*(1. - phi*phi/20.);
     } else {
       cosPhi = cos(phi);
       sinPhi = sin(phi);
       oneLessCosPhi = 1.-cosPhi;
       oneLessCosPhiOPhi = oneLessCosPhi/phi;
       sinPhiOPhi = sinPhi/phi;
       phiLessSinPhiOPhi = 1 - sinPhiOPhi;
     }
 
     Vector bHat = svCurrent.bf; bHat *= 1./b0; //bHat.mag();
     //    bool bAlongZ = fabs(bHat.z()) > 0.9999;
 
     Vector btVec(bHat.cross(tau)); // for balong z btVec.z()==0
     double tauB =  tau.dot(bHat);
     Vector bbtVec(bHat*tauB - tau); // (-tau.x(), -tau.y(), 0)
 
     //don't need it here    tauNext = tau + bbtVec*oneLessCosPhi - btVec*sinPhi;
     drVec = bbtVec*phiLessSinPhiOPhi; drVec -= btVec*oneLessCosPhiOPhi; drVec += tau; 
     drVec *= dS/2.;
 
     double dEdx = svCurrent.dEdx;
     double dEdXPrime = svCurrent.dEdXPrime;
     radX0 = svCurrent.radX0;
     dP = dEdx*dS;
 
     //improve with above values:
     drVec += svCurrent.r3;
     GlobalVector bfGV(0,0,0);
     Vector bf(0,0,0); 
     if (useMagVolumes_ && svCurrent.magVol != 0 && ! useInTeslaFromMagField_){
       bfGV = svCurrent.magVol->inTesla(GlobalPoint(drVec.x(), drVec.y(), drVec.z()));
       bf.set(bfGV.x(), bfGV.y(), bfGV.z());
     } else {
       bfGV = field_->inTesla(GlobalPoint(drVec.x(), drVec.y(), drVec.z()));
       bf.set(bfGV.x(), bfGV.y(), bfGV.z());
     }
     double b0Init = b0;
     b0 = bf.mag();
     if (b0 < 1e-16) {
       b0 = 1e-16;
       bf.set(0., 0., 1e-16);
     }
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Improved b "<<b0
                <<" at r3 "<<drVec<<std::endl;
     }
 
     if (fabs((b0-b0Init)*dS) > 1){
       //missed the mag volume boundary?
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Large bf*dS change "<<fabs((b0-svCurrent.bf.mag())*dS)
              <<" --> recalc dedx"<<std::endl;
       }
       svNext.r3 = drVec;
       svNext.bf = bf;
       svNext.p3 = svCurrent.p3;
       svNext.isYokeVol = svCurrent.isYokeVol;
       svNext.magVol = svCurrent.magVol;
       MatBounds rzTmp;
       dEdx = getDeDx(svNext, dEdXPrime, radX0, rzTmp);
       dP = dEdx*dS;      
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"New dEdX= "<<dEdx
              <<" dP= "<<dP
              <<" for p0 "<<p0<<std::endl;
       }
     }
     //p0 is mid-way and b0 from mid-point
     p0 += dP/2.; if (p0 < 1e-2) p0 = 1e-2;
     p0Inv = 1./p0;
 
     phi = (2.99792458e-3*svCurrent.q*b0*p0Inv)*dS;
     phiSmall = fabs(phi) < 1e-4;
 
     if (phiSmall){
       double phi2 = phi*phi;
       double phi3 = phi2*phi;
       double phi4 = phi3*phi;
       sinPhi = phi - phi3/6. + phi4*phi/120.;
       cosPhi = 1. -phi2/2. + phi4/24.;
       oneLessCosPhi = phi2/2. - phi4/24. + phi2*phi4/720.; // 0.5*phi*phi;//*(1.- phi*phi/12.);
       oneLessCosPhiOPhi = 0.5*phi - phi3/24. + phi2*phi3/720.;//*(1.- phi*phi/12.);
       sinPhiOPhi = 1. - phi*phi/6. + phi4/120.;
       phiLessSinPhiOPhi = phi*phi/6. - phi4/120. + phi4*phi2/5040.;//*(1. - phi*phi/20.);
     }else {
       cosPhi = cos(phi); 
       sinPhi = sin(phi);
       oneLessCosPhi = 1.-cosPhi;
       oneLessCosPhiOPhi = oneLessCosPhi/phi;
       sinPhiOPhi = sinPhi/phi;
       phiLessSinPhiOPhi = 1. - sinPhiOPhi;
     }
 
     bHat = bf; bHat *= 1./b0;// as above =1./bHat.mag();
     //    bAlongZ = fabs(bHat.z()) > 0.9999;
     btVec = bHat.cross(tau); // for b||z (-tau.y(), tau.x() ,0)
     tauB = tau.dot(bHat);
     bbtVec = bHat*tauB - tau; //bHat.cross(btVec); for b||z: (-tau.x(), -tau.y(), 0)
 
     tauNext = bbtVec*oneLessCosPhi; tauNext -= btVec*sinPhi;     tauNext += tau; //for b||z tauNext.z() == tau.z()
     double tauNextPerpInv = 1./tauNext.perp();
     drVec   = bbtVec*phiLessSinPhiOPhi; drVec -= btVec*oneLessCosPhiOPhi;  drVec += tau;
     drVec *= dS;
     
     
     if (svCurrent.hasErrorPropagated_){
       double theta02 = 0;
       double dX0 = fabs(dS)/radX0;
 
       if (applyRadX0Correction_){
     // this provides the integrand for theta^2
     // if summed up along the path, should result in 
     // theta_total^2 = Int_0^x0{ f(x)dX} = (13.6/p0)^2*x0*(1+0.036*ln(x0+1))
     // x0+1 above is to make the result infrared safe.
     double x0 = fabs(svCurrent.radPath());
     double alphaX0 = 13.6e-3*p0Inv; alphaX0 *= alphaX0;
     double betaX0 = 0.038;
     double logx0p1 = log(x0+1);
     theta02 = dX0*alphaX0*(1+betaX0*logx0p1)*(1 + betaX0*logx0p1 + 2.*betaX0*x0/(x0+1) );
       } else {
     theta02 = 196e-6* p0Inv * p0Inv * dX0; //14.e-3/p0*sqrt(fabs(dS)/radX0); // .. drop log term (this is non-additive)
       }
       
       double epsilonP0 = 1.+ dP/(p0-0.5*dP);
       //      double omegaP0 = -dP/(p0-0.5*dP) + dS*dEdXPrime;      
       //      double dsp = dS/(p0-0.5*dP); //use the initial p0 (not the mid-point) to keep the transport properly additive
       
       Vector tbtVec(bHat - tauB*tau); // for b||z tau.z()*(-tau.x(), -tau.y(), 1.-tau.z())
       
       {
     //Slightly modified copy of the curvilinear jacobian (don't use the original just because it's in float precision
     // and seems to have some assumptions about the field values
     // notation changes: p1--> tau, p2-->tauNext
     // theta --> phi
     //  Vector p1 = tau;
     //  Vector p2 = tauNext;
     Point xStart = svCurrent.r3;
     Vector dx = drVec;
     //GlobalVector h  = MagneticField::inInverseGeV(xStart);
     // Martijn: field is now given as parameter.. GlobalVector h  = globalParameters.magneticFieldInInverseGeV(xStart);
 
     //double qbp = fts.signedInverseMomentum();
     double qbp = svCurrent.q*p0Inv;
     //  double absS = dS;
   
     // calculate transport matrix
     // Origin: TRPRFN
     double t11 = tau.x(); double t12 = tau.y(); double t13 = tau.z();
     double t21 = tauNext.x(); double t22 = tauNext.y(); double t23 = tauNext.z();
     double cosl0 = tau.perp(); 
     //  double cosl1 = 1./tauNext.perp(); //not quite a cos .. it's a cosec--> change to cosecl1 below
     double cosecl1 = tauNextPerpInv;
     //AlgebraicMatrix a(5,5,1);
     // define average magnetic field and gradient 
     // at initial point - inlike TRPRFN
     Vector hn = bHat;
     //  double qp = -2.99792458e-3*b0;
     //   double q = -h.mag()*qbp;
 
     double q = -phi/dS; //qp*qbp; // -phi/dS
     //  double theta = -phi; 
     double sint = -sinPhi; double cost = cosPhi;
     double hn1 = hn.x(); double hn2 = hn.y(); double hn3 = hn.z();
     double dx1 = dx.x(); double dx2 = dx.y(); double dx3 = dx.z();
     //  double hnDt1 = hn1*t11 + hn2*t12 + hn3*t13;
 
     double gamma =  hn1*t21 + hn2*t22 + hn3*t23;
     double an1 =  hn2*t23 - hn3*t22;
     double an2 =  hn3*t21 - hn1*t23;
     double an3 =  hn1*t22 - hn2*t21;
     //    double auInv = sqrt(1.- t13*t13); double au = auInv>0 ? 1./auInv : 1e24;
     double auInv = cosl0; double au = auInv>0 ? 1./auInv : 1e24;
     //    double auInv = sqrt(t11*t11 + t12*t12); double au = auInv>0 ? 1./auInv : 1e24;
     double u11 = -au*t12; double u12 = au*t11;
     double v11 = -t13*u12; double v12 = t13*u11; double v13 = auInv;//t11*u12 - t12*u11;
     auInv = sqrt(1. - t23*t23); au = auInv>0 ? 1./auInv : 1e24;
     //    auInv = sqrt(t21*t21 + t22*t22); au = auInv>0 ? 1./auInv : 1e24;
     double u21 = -au*t22; double u22 = au*t21;
     double v21 = -t23*u22; double v22 = t23*u21; double v23 = auInv;//t21*u22 - t22*u21;
     // now prepare the transport matrix
     // pp only needed in high-p case (WA)
     //   double pp = 1./qbp;
     // moved up (where -h.mag() is needed()
     //   double qp = q*pp;
     double anv =  -(hn1*u21 + hn2*u22          );
     double anu =   (hn1*v21 + hn2*v22 + hn3*v23); 
     double omcost = oneLessCosPhi; double tmsint = -phi*phiLessSinPhiOPhi;
     
     double hu1 =         - hn3*u12;
     double hu2 =  hn3*u11;
     double hu3 =  hn1*u12 - hn2*u11;
     
     double hv1 =  hn2*v13 - hn3*v12;
     double hv2 =  hn3*v11 - hn1*v13;
     double hv3 =  hn1*v12 - hn2*v11;
     
     //   1/p - doesn't change since |tau| = |tauNext| ... not. It changes now
     dCCurvTransform(0,0) = 1./(epsilonP0*epsilonP0)*(1. + dS*dEdXPrime);
     
     //   lambda
     
     dCCurvTransform(1,0) = phi*p0/svCurrent.q*cosecl1*
       (sinPhi*bbtVec.z() - cosPhi*btVec.z());
     //was dCCurvTransform(1,0) = -qp*anv*(t21*dx1 + t22*dx2 + t23*dx3); //NOTE (SK) this was found to have an opposite sign
     //from independent re-calculation ... in fact the tauNext.dot.dR piece isnt reproduced 
     
     dCCurvTransform(1,1) = cost*(v11*v21 + v12*v22 + v13*v23) +
       sint*(hv1*v21 + hv2*v22 + hv3*v23) +
       omcost*(hn1*v11 + hn2*v12 + hn3*v13) * (hn1*v21 + hn2*v22 + hn3*v23) +
       anv*(-sint*(v11*t21 + v12*t22 + v13*t23) +
            omcost*(v11*an1 + v12*an2 + v13*an3) -
            tmsint*gamma*(hn1*v11 + hn2*v12 + hn3*v13) );
     
     dCCurvTransform(1,2) = cost*(u11*v21 + u12*v22          ) +
       sint*(hu1*v21 + hu2*v22 + hu3*v23) +
       omcost*(hn1*u11 + hn2*u12          ) * (hn1*v21 + hn2*v22 + hn3*v23) +
       anv*(-sint*(u11*t21 + u12*t22          ) +
            omcost*(u11*an1 + u12*an2          ) -
            tmsint*gamma*(hn1*u11 + hn2*u12          ) );
     dCCurvTransform(1,2) *= cosl0;
     
     // Commented out in part for reproducibility purposes: these terms are zero in cart->curv 
     //  dCCurvTransform(1,3) = -q*anv*(u11*t21 + u12*t22          ); //don't show up in cartesian setup-->curv
     //why would lambdaNext depend explicitely on initial position ? any arbitrary init point can be chosen not 
     // affecting the final state's momentum direction ... is this the field gradient in curvilinear coord?
     //  dCCurvTransform(1,4) = -q*anv*(v11*t21 + v12*t22 + v13*t23); //don't show up in cartesian setup-->curv
     
     //   phi
     
     dCCurvTransform(2,0) = - phi*p0/svCurrent.q*cosecl1*cosecl1*
       (oneLessCosPhi*bHat.z()*btVec.mag2() + sinPhi*btVec.z() + cosPhi*tbtVec.z()) ;
     //was   dCCurvTransform(2,0) = -qp*anu*(t21*dx1 + t22*dx2 + t23*dx3)*cosecl1;
     
     dCCurvTransform(2,1) = cost*(v11*u21 + v12*u22          ) +
       sint*(hv1*u21 + hv2*u22          ) +
       omcost*(hn1*v11 + hn2*v12 + hn3*v13) *
       (hn1*u21 + hn2*u22          ) +
       anu*(-sint*(v11*t21 + v12*t22 + v13*t23) +
            omcost*(v11*an1 + v12*an2 + v13*an3) -
            tmsint*gamma*(hn1*v11 + hn2*v12 + hn3*v13) );
     dCCurvTransform(2,1) *= cosecl1;
     
     dCCurvTransform(2,2) = cost*(u11*u21 + u12*u22          ) +
       sint*(hu1*u21 + hu2*u22          ) +
       omcost*(hn1*u11 + hn2*u12          ) *
       (hn1*u21 + hn2*u22          ) +
       anu*(-sint*(u11*t21 + u12*t22          ) +
            omcost*(u11*an1 + u12*an2          ) -
            tmsint*gamma*(hn1*u11 + hn2*u12          ) );
     dCCurvTransform(2,2) *= cosecl1*cosl0;
     
     // Commented out in part for reproducibility purposes: these terms are zero in cart->curv 
     // dCCurvTransform(2,3) = -q*anu*(u11*t21 + u12*t22          )*cosecl1;
     //why would lambdaNext depend explicitely on initial position ? any arbitrary init point can be chosen not 
     // affecting the final state's momentum direction ... is this the field gradient in curvilinear coord?
     // dCCurvTransform(2,4) = -q*anu*(v11*t21 + v12*t22 + v13*t23)*cosecl1;
     
     //   yt
     
     double pp = 1./qbp;
     // (SK) these terms seem to consistently have a sign opp from private derivation
     dCCurvTransform(3,0) = - pp*(u21*dx1 + u22*dx2            ); //NB: modified from the original: changed the sign
     dCCurvTransform(4,0) = - pp*(v21*dx1 + v22*dx2 + v23*dx3);  
     
     
     dCCurvTransform(3,1) = (sint*(v11*u21 + v12*u22          ) +
                  omcost*(hv1*u21 + hv2*u22          ) +
                  tmsint*(hn1*u21 + hn2*u22          ) *
                  (hn1*v11 + hn2*v12 + hn3*v13))/q;
     
     dCCurvTransform(3,2) = (sint*(u11*u21 + u12*u22          ) +
                  omcost*(hu1*u21 + hu2*u22          ) +
                  tmsint*(hn1*u21 + hn2*u22          ) *
                  (hn1*u11 + hn2*u12          ))*cosl0/q;
     
     dCCurvTransform(3,3) = (u11*u21 + u12*u22          );
     
     dCCurvTransform(3,4) = (v11*u21 + v12*u22          );
     
     //   zt
     
     dCCurvTransform(4,1) = (sint*(v11*v21 + v12*v22 + v13*v23) +
                  omcost*(hv1*v21 + hv2*v22 + hv3*v23) +
                  tmsint*(hn1*v21 + hn2*v22 + hn3*v23) *
                  (hn1*v11 + hn2*v12 + hn3*v13))/q;
     
     dCCurvTransform(4,2) = (sint*(u11*v21 + u12*v22          ) +
                  omcost*(hu1*v21 + hu2*v22 + hu3*v23) +
                  tmsint*(hn1*v21 + hn2*v22 + hn3*v23) *
                  (hn1*u11 + hn2*u12          ))*cosl0/q;
     
     dCCurvTransform(4,3) = (u11*v21 + u12*v22          );
     
     dCCurvTransform(4,4) = (v11*v21 + v12*v22 + v13*v23);
     // end of TRPRFN
       }
     
       if (debug_){
     Basis rep; setRep(rep, tauNext);
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"rep X: "<<rep.lX<<" "<<rep.lX.mag()
              <<"\t Y: "<<rep.lY<<" "<<rep.lY.mag()
              <<"\t Z: "<<rep.lZ<<" "<<rep.lZ.mag();
       }
       //mind the sign of dS and dP (dS*dP < 0 allways)
       //covariance should grow no matter which direction you propagate
       //==> take abs values.
       //reset not needed: fill all below  svCurrent.matDCov *= 0.;
       double mulRR = theta02*dS*dS/3.;
       double mulRP = theta02*fabs(dS)*p0/2.;
       double mulPP = theta02*p0*p0;
       double losPP = dP*dP*1.6/fabs(dS)*(1.0 + p0*1e-3);
       //another guess .. makes sense for 1 cm steps 2./dS == 2 [cm] / dS [cm] at low pt
       //double it by 1TeV
       //not gaussian anyways
       // derived from the fact that sigma_p/eLoss ~ 0.08 after ~ 200 steps
 
       //curvilinear
       double sinThetaInv = tauNextPerpInv;
       double p0Mat = p0+ 0.5*dP; // FIXME change this to p0 after it's clear that there's agreement in everything else
       double p0Mat2 = p0Mat*p0Mat;
       // with 6x6 formulation
       svCurrent.matDCovCurv*=0;
       
       svCurrent.matDCovCurv(0,0) = losPP/(p0Mat2*p0Mat2);
       //      svCurrent.matDCovCurv(0,1) = 0;
       //      svCurrent.matDCovCurv(0,2) = 0;
       //      svCurrent.matDCovCurv(0,3) = 0;
       //      svCurrent.matDCovCurv(0,4) = 0;
 
       //      svCurrent.matDCovCurv(1,0) = 0;
       svCurrent.matDCovCurv(1,1) = mulPP/p0Mat2;
       //      svCurrent.matDCovCurv(1,2) = 0;
       //      svCurrent.matDCovCurv(1,3) = 0;
       svCurrent.matDCovCurv(1,4) = mulRP/p0Mat;
 
       //      svCurrent.matDCovCurv(2,0) = 0;
       //      svCurrent.matDCovCurv(2,1) = 0;
       svCurrent.matDCovCurv(2,2) = mulPP/p0Mat2*(sinThetaInv*sinThetaInv);
       svCurrent.matDCovCurv(2,3) = mulRP/p0Mat*sinThetaInv;
       //      svCurrent.matDCovCurv(2,4) = 0;
 
       //      svCurrent.matDCovCurv(3,0) = 0;
       //      svCurrent.matDCovCurv(3,1) = 0;
       svCurrent.matDCovCurv(3,2) = mulRP/p0Mat*sinThetaInv;
       //      svCurrent.matDCovCurv(3,0) = 0;
       svCurrent.matDCovCurv(3,3) = mulRR;
       //      svCurrent.matDCovCurv(3,4) = 0;
 
       //      svCurrent.matDCovCurv(4,0) = 0;
       svCurrent.matDCovCurv(4,1) = mulRP/p0Mat;
       //      svCurrent.matDCovCurv(4,2) = 0;
       //      svCurrent.matDCovCurv(4,3) = 0;
       svCurrent.matDCovCurv(4,4) = mulRR;
     }
     break;
   }
   default:
     break;
   }
   
   double pMag = curP;//svCurrent.p3.mag();
   
   if (dir == oppositeToMomentum) dP = fabs(dP);
   else if( dP < 0) { //the case of negative dP
     dP = -dP > pMag ? -pMag+1e-5 : dP;
   }
   
   getNextState(svCurrent, svNext, dP, tauNext, drVec, dS, dS/radX0,
            dCCurvTransform);
   return true;
 }

void SteppingHelixPropagator::propagate	(	const SteppingHelixStateInfo &	ftsStart,
		const Surface &	sDest,
		SteppingHelixStateInfo &	out
	)		const

Propagate to Plane given a starting point.

Definition at line 173 of file SteppingHelixPropagator.cc.

References invalidState_, SteppingHelixStateInfo::isValid(), and sendLogWarning_.

Referenced by AlCaHOCalibProducer::produce(), propagate(), and propagateWithPath().

                                                       {
   
   if (! sStart.isValid()){
     if (sendLogWarning_){
       edm::LogWarning("SteppingHelixPropagator")<<"Can't propagate: invalid input state"
                         <<std::endl;
     }
     out=invalidState_;
     return;
   }
 
   const Plane* pDest = dynamic_cast<const Plane*>(&sDest);
   if (pDest != 0) {
     propagate(sStart, *pDest, out);
     return;
   }
 
   const Cylinder* cDest = dynamic_cast<const Cylinder*>(&sDest);
   if (cDest != 0) {
     propagate(sStart, *cDest, out);
     return;
   }
       
   throw PropagationException("The surface is neither Cylinder nor Plane");
 
 }

void SteppingHelixPropagator::propagate	(	const SteppingHelixStateInfo &	ftsStart,
		const Plane &	pDest,
		SteppingHelixStateInfo &	out
	)		const

Definition at line 203 of file SteppingHelixPropagator.cc.

References cIndex_(), initStateArraySHPSpecific(), invalidState_, SteppingHelixStateInfo::isValid(), SteppingHelixStateInfo::path(), PLANE_DT, GloballyPositioned< T >::position(), propagate(), mathSSE::return(), GloballyPositioned< T >::rotation(), sendLogWarning_, setIState(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), PV3DBase< T, PVType, FrameType >::z(), TkRotation< T >::zx(), TkRotation< T >::zy(), and TkRotation< T >::zz().

                                                       {
   
   if (! sStart.isValid()){
     if (sendLogWarning_){
       edm::LogWarning("SteppingHelixPropagator")<<"Can't propagate: invalid input state"
                         <<std::endl;
     }    
     out = invalidState_; 
     return ;
   }
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(sStart,svBuf,nPoints);
   
   Point rPlane(pDest.position().x(), pDest.position().y(), pDest.position().z());
   Vector nPlane(pDest.rotation().zx(), pDest.rotation().zy(), pDest.rotation().zz()); nPlane /= nPlane.mag();
 
   double pars[6] = { rPlane.x(), rPlane.y(), rPlane.z(),
              nPlane.x(), nPlane.y(), nPlane.z() };
 
   propagate(svBuf,nPoints,PLANE_DT, pars);
   
   //(re)set it before leaving: dir =1 (-1) if path increased (decreased) and 0 if it didn't change
   //need to implement this somewhere else as a separate function
   double lDir = 0;
   if (sStart.path() < svBuf[cIndex_(nPoints-1)].path()) lDir = 1.;
   if (sStart.path() > svBuf[cIndex_(nPoints-1)].path()) lDir = -1.;
   svBuf[cIndex_(nPoints-1)].dir = lDir;
 
   out = svBuf[cIndex_(nPoints-1)];
   return;
 }

void SteppingHelixPropagator::propagate	(	const SteppingHelixStateInfo &	ftsStart,
		const Cylinder &	cDest,
		SteppingHelixStateInfo &	out
	)		const

Propagate to Cylinder given a starting point (a Cylinder is assumed to be positioned at 0,0,0)

Definition at line 239 of file SteppingHelixPropagator.cc.

References cIndex_(), initStateArraySHPSpecific(), invalidState_, SteppingHelixStateInfo::isValid(), SteppingHelixStateInfo::path(), propagate(), Cylinder::radius(), RADIUS_DT, RADIUS_P, sendLogWarning_, and setIState().

                                                       {
   
   if (! sStart.isValid()){
     if (sendLogWarning_){
       edm::LogWarning("SteppingHelixPropagator")<<"Can't propagate: invalid input state"
                         <<std::endl;
     }
     out = invalidState_;
     return;
   }
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(sStart,svBuf,nPoints);
   
   double pars[6] = {0,0,0,0,0,0};
   pars[RADIUS_P] = cDest.radius();
 
   
   propagate(svBuf,nPoints,RADIUS_DT, pars);
   
   //(re)set it before leaving: dir =1 (-1) if path increased (decreased) and 0 if it didn't change
   //need to implement this somewhere else as a separate function
   double lDir = 0;
   if (sStart.path() < svBuf[cIndex_(nPoints-1)].path()) lDir = 1.;
   if (sStart.path() > svBuf[cIndex_(nPoints-1)].path()) lDir = -1.;
   svBuf[cIndex_(nPoints-1)].dir = lDir;
   out= svBuf[cIndex_(nPoints-1)];
   return;
 }

void SteppingHelixPropagator::propagate	(	const SteppingHelixStateInfo &	ftsStart,
		const GlobalPoint &	pDest,
		SteppingHelixStateInfo &	out
	)		const

Propagate to PCA to point given a starting point.

Definition at line 272 of file SteppingHelixPropagator.cc.

References cIndex_(), initStateArraySHPSpecific(), invalidState_, SteppingHelixStateInfo::isValid(), POINT_PCA_DT, propagate(), sendLogWarning_, setIState(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                                       {
   
   if (! sStart.isValid()){
     if (sendLogWarning_){
       edm::LogWarning("SteppingHelixPropagator")<<"Can't propagate: invalid input state"
                         <<std::endl;
     }    
     out = invalidState_;
     return;
   }
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(sStart,svBuf,nPoints);
   
   double pars[6] = {pDest.x(), pDest.y(), pDest.z(), 0, 0, 0};
 
   
   propagate(svBuf,nPoints,POINT_PCA_DT, pars);
   
   out = svBuf[cIndex_(nPoints-1)];
   return;
 }

void SteppingHelixPropagator::propagate	(	const SteppingHelixStateInfo &	ftsStart,
		const GlobalPoint &	pDest1,
		const GlobalPoint &	pDest2,
		SteppingHelixStateInfo &	out
	)		const

Propagate to PCA to a line (given by 2 points) given a starting point.

Definition at line 298 of file SteppingHelixPropagator.cc.

References cIndex_(), alignCSCRings::e, initStateArraySHPSpecific(), invalidState_, SteppingHelixStateInfo::isValid(), LINE_PCA_DT, mag(), propagate(), sendLogWarning_, setIState(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                                       {
   
   if ((pDest1-pDest2).mag() < 1e-10 || !sStart.isValid()){
     if (sendLogWarning_){
       if ((pDest1-pDest2).mag() < 1e-10)
     edm::LogWarning("SteppingHelixPropagator")<<"Can't propagate: points are too close"
                           <<std::endl;
       if (!sStart.isValid())
     edm::LogWarning("SteppingHelixPropagator")<<"Can't propagate: invalid input state"
                           <<std::endl;
     }
     out = invalidState_;
     return;
   }
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(sStart,svBuf,nPoints);
   
   double pars[6] = {pDest1.x(), pDest1.y(), pDest1.z(),
             pDest2.x(), pDest2.y(), pDest2.z()};
   
   propagate(svBuf,nPoints,LINE_PCA_DT, pars);
   
   out = svBuf[cIndex_(nPoints-1)];
   return;
 }

SteppingHelixPropagator::Result SteppingHelixPropagator::propagate	(	StateArray &	svBuff,
		int &	nPoints,
		SteppingHelixPropagator::DestType	type,
		const double	pars[6],
		double	epsilon = `1e-3`
	)		const

protected

propagate: chose stop point by type argument propagate to fixed radius [ r = sqrt(x**2+y**2) ] with precision epsilon propagate to plane by [x0,y0,z0, n_x, n_y, n_z] parameters

define a fast-skip distance: should be the shortest of a possible step or distance

Definition at line 343 of file SteppingHelixPropagator.cc.

                                                                {
 
   static const std::string metname = "SteppingHelixPropagator";
   StateInfo* svCurrent = &svBuf[cIndex_(nPoints-1)];
 
   //check if it's going to work at all
   double tanDist = 0;
   double dist = 0;
   PropagationDirection refDirection = anyDirection;
   Result result = refToDest(type, (*svCurrent), pars, dist, tanDist, refDirection);
 
   if (result != SteppingHelixStateInfo::OK || fabs(dist) > 1e6){
     svCurrent->status_ = result;
     if (fabs(dist) > 1e6) svCurrent->status_ = SteppingHelixStateInfo::INACC;
     svCurrent->isValid_ = false;
     svCurrent->field = field_;
     if (sendLogWarning_){
       edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<" Failed after first refToDest check with status "
                   <<SteppingHelixStateInfo::ResultName[result]
                   <<std::endl;
     }
     return result;
   }
 
   result = SteppingHelixStateInfo::UNDEFINED;
   bool makeNextStep = true;
   double dStep = defaultStep_;
   PropagationDirection dir,oldDir;
   dir = propagationDirection(); 
   oldDir = dir;
   int nOsc = 0;
 
   double distMag = 1e12;
   double tanDistMag = 1e12;
 
   double distMat = 1e12;
   double tanDistMat = 1e12;
 
   double tanDistNextCheck = -0.1;//just need a negative start val
   double tanDistMagNextCheck = -0.1;
   double tanDistMatNextCheck = -0.1;
   double oldDStep = 0;
   PropagationDirection oldRefDirection = propagationDirection();
 
   Result resultToMat = SteppingHelixStateInfo::UNDEFINED;
   Result resultToMag = SteppingHelixStateInfo::UNDEFINED;
 
   bool isFirstStep = true;
   bool expectNewMagVolume = false;
 
   int loopCount = 0;
   while (makeNextStep){
     dStep = defaultStep_;
     svCurrent = &svBuf[cIndex_(nPoints-1)];
     double curZ = svCurrent->r3.z();
     double curR = svCurrent->r3.perp();
     if ( fabs(curZ) < 440 && curR < 260) dStep = defaultStep_*2;
 
     //more such ifs might be scattered around
     //even though dStep is large, it will still make stops at each volume boundary
     if (useTuningForL2Speed_){
       dStep = 100.;
       if (! useIsYokeFlag_ && fabs(curZ) < 667 && curR > 380 && curR < 850){
     dStep = 5*(1+0.2*svCurrent->p3.mag());
       }
     }
 
     //    refDirection = propagationDirection();
 
     tanDistNextCheck -= oldDStep;
     tanDistMagNextCheck -= oldDStep;
     tanDistMatNextCheck -= oldDStep;
     
     if (tanDistNextCheck < 0){
       //use pre-computed values if it's the first step
       if (! isFirstStep) refToDest(type, (*svCurrent), pars, dist, tanDist, refDirection);
       // constrain allowed path for a tangential approach
       if (fabs(tanDist) > 4.*(fabs(dist)) ) tanDist *= tanDist == 0 ? 0 :fabs(dist/tanDist*4.);
 
       tanDistNextCheck = fabs(tanDist)*0.5 - 0.5; //need a better guess (to-do)
       //reasonable limit
       if (tanDistNextCheck >  defaultStep_*20. ) tanDistNextCheck = defaultStep_*20.;
       oldRefDirection = refDirection;
     } else {
       tanDist  = tanDist > 0. ? tanDist - oldDStep : tanDist + oldDStep; 
       refDirection = oldRefDirection;
       if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Skipped refToDest: guess tanDist = "<<tanDist
                    <<" next check at "<<tanDistNextCheck<<std::endl;
     }
     double fastSkipDist = fabs(dist) > fabs(tanDist) ? tanDist : dist;
 
     if (propagationDirection() == anyDirection){
       dir = refDirection;
     } else {
       dir = propagationDirection();
       if (fabs(tanDist)<0.1 && refDirection != dir ){
     //how did it get here?  nOsc++;
     dir = refDirection;
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"NOTE: overstepped last time: switch direction (can do it if within 1 mm)"<<std::endl;
       }
     }    
 
     if (useMagVolumes_ && ! (fabs(dist) < fabs(epsilon))){//need to know the general direction
       if (tanDistMagNextCheck < 0){
     resultToMag = refToMagVolume((*svCurrent), dir, distMag, tanDistMag, fabs(fastSkipDist), expectNewMagVolume, fabs(tanDist));
     // constrain allowed path for a tangential approach
     if (fabs(tanDistMag) > 4.*(fabs(distMag)) ) tanDistMag *= tanDistMag == 0 ? 0 : fabs(distMag/tanDistMag*4.);
 
     tanDistMagNextCheck = fabs(tanDistMag)*0.5-0.5; //need a better guess (to-do)
     //reasonable limit; "turn off" checking if bounds are further than the destination
     if (tanDistMagNextCheck >  defaultStep_*20. 
         || fabs(dist) < fabs(distMag)
         || resultToMag ==SteppingHelixStateInfo::INACC) 
       tanDistMagNextCheck  = defaultStep_*20 > fabs(fastSkipDist) ? fabs(fastSkipDist) : defaultStep_*20;   
     if (resultToMag != SteppingHelixStateInfo::INACC 
         && resultToMag != SteppingHelixStateInfo::OK) tanDistMagNextCheck = -1;
       } else {
     //  resultToMag = SteppingHelixStateInfo::OK;
     tanDistMag  = tanDistMag > 0. ? tanDistMag - oldDStep : tanDistMag + oldDStep; 
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Skipped refToMag: guess tanDistMag = "<<tanDistMag
                      <<" next check at "<<tanDistMagNextCheck;
       }
     }
 
     if (useMatVolumes_ && ! (fabs(dist) < fabs(epsilon))){//need to know the general direction
       if (tanDistMatNextCheck < 0){
     resultToMat = refToMatVolume((*svCurrent), dir, distMat, tanDistMat, fabs(fastSkipDist));
     // constrain allowed path for a tangential approach
     if (fabs(tanDistMat) > 4.*(fabs(distMat)) ) tanDistMat *= tanDistMat == 0 ? 0 : fabs(distMat/tanDistMat*4.);
 
     tanDistMatNextCheck = fabs(tanDistMat)*0.5-0.5; //need a better guess (to-do)
     //reasonable limit; "turn off" checking if bounds are further than the destination
     if (tanDistMatNextCheck >  defaultStep_*20. 
         || fabs(dist) < fabs(distMat)
         || resultToMat ==SteppingHelixStateInfo::INACC ) 
       tanDistMatNextCheck = defaultStep_*20 > fabs(fastSkipDist) ? fabs(fastSkipDist) : defaultStep_*20;
     if (resultToMat != SteppingHelixStateInfo::INACC 
         && resultToMat != SteppingHelixStateInfo::OK) tanDistMatNextCheck = -1;
       } else {
     //  resultToMat = SteppingHelixStateInfo::OK;
     tanDistMat  = tanDistMat > 0. ? tanDistMat - oldDStep : tanDistMat + oldDStep; 
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Skipped refToMat: guess tanDistMat = "<<tanDistMat
                      <<" next check at "<<tanDistMatNextCheck;
       }
     }
 
     double rDotP = svCurrent->r3.dot(svCurrent->p3);
     if ((fabs(curZ) > 1.5e3 || curR >800.) 
     && ((dir == alongMomentum && rDotP > 0) 
         || (dir == oppositeToMomentum && rDotP < 0) )
     ){
       dStep = fabs(tanDist) -1e-12;
     }
     double tanDistMin = fabs(tanDist);
     if (tanDistMin > fabs(tanDistMag)+0.05 && 
     (resultToMag == SteppingHelixStateInfo::OK || resultToMag == SteppingHelixStateInfo::WRONG_VOLUME)){
       tanDistMin = fabs(tanDistMag)+0.05;     //try to step into the next volume
       expectNewMagVolume = true;
     } else expectNewMagVolume = false;
 
     if (tanDistMin > fabs(tanDistMat)+0.05 && resultToMat == SteppingHelixStateInfo::OK){
       tanDistMin = fabs(tanDistMat)+0.05;     //try to step into the next volume
       if (expectNewMagVolume) expectNewMagVolume = false;
     }
 
     if (tanDistMin*fabs(svCurrent->dEdx) > 0.5*svCurrent->p3.mag()){
       tanDistMin = 0.5*svCurrent->p3.mag()/fabs(svCurrent->dEdx);
       if (expectNewMagVolume) expectNewMagVolume = false;
     }
 
 
 
     double tanDistMinLazy = fabs(tanDistMin);
     if ((type == POINT_PCA_DT || type == LINE_PCA_DT)
     && fabs(tanDist) < 2.*fabs(tanDistMin) ){
       //being lazy here; the best is to take into account the curvature
       tanDistMinLazy = fabs(tanDistMin)*0.5;
     }
  
     if (fabs(tanDistMinLazy) < dStep){
       dStep = fabs(tanDistMinLazy); 
     }
 
     //keep this path length for the next step
     oldDStep = dStep;
 
     if (dStep > 1e-10 && ! (fabs(dist) < fabs(epsilon))){
       StateInfo* svNext = &svBuf[cIndex_(nPoints)];
       makeAtomStep((*svCurrent), (*svNext), dStep, dir, HEL_AS_F);
 //       if (useMatVolumes_ && expectNewMagVolume 
 //    && svCurrent->magVol == svNext->magVol){
 //  double tmpDist=0;
 //  double tmpDistMag = 0;
 //  if (refToMagVolume((*svNext), dir, tmpDist, tmpDistMag, fabs(dist)) != SteppingHelixStateInfo::OK){
 //  //the point appears to be outside, but findVolume claims the opposite
 //    dStep += 0.05*fabs(tanDistMag/distMag); oldDStep = dStep; //do it again with a bigger step
 //    if (debug_) LogTrace(metname)
 //      <<"Failed to get into new mag volume: will try with new bigger step "<<dStep<<std::endl;
 //    makeAtomStep((*svCurrent), (*svNext), dStep, dir, HEL_AS_F);    
 //  }
 //       }
       nPoints++;    svCurrent = &svBuf[cIndex_(nPoints-1)];
       if (oldDir != dir){
     nOsc++;
     tanDistNextCheck = -1;//check dist after osc
     tanDistMagNextCheck = -1;
     tanDistMatNextCheck = -1;
       }
       oldDir = dir;
     }
 
     if (nOsc>1 && fabs(dStep)>epsilon){
       if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Ooops"<<std::endl;
     }
 
     if (fabs(dist) < fabs(epsilon)  ) result = SteppingHelixStateInfo::OK;
 
     if ((type == POINT_PCA_DT || type == LINE_PCA_DT )
     && fabs(dStep) < fabs(epsilon)  ){
       //now check if it's not a branch point (peek ahead at 1 cm)
       double nextDist = 0;
       double nextTanDist = 0;
       PropagationDirection nextRefDirection = anyDirection;
       StateInfo* svNext = &svBuf[cIndex_(nPoints)];
       makeAtomStep((*svCurrent), (*svNext), 1., dir, HEL_AS_F);
       nPoints++;     svCurrent = &svBuf[cIndex_(nPoints-1)];
       refToDest(type, (*svCurrent), pars, nextDist, nextTanDist, nextRefDirection);
       if ( fabs(nextDist) > fabs(dist)){
     nPoints--;      svCurrent = &svBuf[cIndex_(nPoints-1)];
     result = SteppingHelixStateInfo::OK;
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Found real local minimum in PCA"<<std::endl;
     }
       } else {
     //keep this trial point and continue
     dStep = defaultStep_;
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Found branch point in PCA"<<std::endl;
     }
       }
     }
 
     if (nPoints > MAX_STEPS*1./defaultStep_  || loopCount > MAX_STEPS*100
     || nOsc > 6 ) result = SteppingHelixStateInfo::FAULT;
 
     if (svCurrent->p3.mag() < 0.1 ) result = SteppingHelixStateInfo::RANGEOUT;
 
     curZ = svCurrent->r3.z();
     curR = svCurrent->r3.perp();
     if ( curR > 20000 || fabs(curZ) > 20000 ) result = SteppingHelixStateInfo::INACC;
 
     makeNextStep = result == SteppingHelixStateInfo::UNDEFINED;
     svCurrent->status_ = result;
     svCurrent->isValid_ = (result == SteppingHelixStateInfo::OK || makeNextStep );
     svCurrent->field = field_;
 
     isFirstStep = false;
     loopCount++;
   }
 
   if (sendLogWarning_ && result != SteppingHelixStateInfo::OK){
     edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<" Propagation failed with status "
                 <<SteppingHelixStateInfo::ResultName[result]
                 <<std::endl;
     if (result == SteppingHelixStateInfo::RANGEOUT)
       edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<" Momentum at last point is too low (<0.1) p_last = "
                   <<svCurrent->p3.mag()
                   <<std::endl;
     if (result == SteppingHelixStateInfo::INACC)
       edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<" Went too far: the last point is at "<<svCurrent->r3
                   <<std::endl;
     if (result == SteppingHelixStateInfo::FAULT && nOsc > 6)
       edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<" Infinite loop condidtion detected: going in cycles. Break after 6 cycles"
                   <<std::endl;
     if (result == SteppingHelixStateInfo::FAULT && nPoints > MAX_STEPS*1./defaultStep_)
       edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<" Tired to go farther. Made too many steps: more than "
                   <<MAX_STEPS*1./defaultStep_
                   <<std::endl;
     
   }
 
   if (debug_){
     switch (type) {
     case RADIUS_DT:
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"going to radius "<<pars[RADIUS_P]<<std::endl;
       break;
     case Z_DT:
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"going to z "<<pars[Z_P]<<std::endl;
       break;
     case PATHL_DT:
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"going to pathL "<<pars[PATHL_P]<<std::endl;
       break;
     case PLANE_DT:
       {
     Point rPlane(pars[0], pars[1], pars[2]);
     Vector nPlane(pars[3], pars[4], pars[5]);
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"going to plane r0:"<<rPlane<<" n:"<<nPlane<<std::endl;
       }
       break;
     case POINT_PCA_DT:
       {
     Point rDest(pars[0], pars[1], pars[2]);
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"going to PCA to point "<<rDest<<std::endl;
       }
       break;
     case LINE_PCA_DT:
       {
     Point rDest1(pars[0], pars[1], pars[2]);
     Point rDest2(pars[3], pars[4], pars[5]);
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"going to PCA to line "<<rDest1<<" - "<<rDest2<<std::endl;
       }
       break;
     default:
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"going to NOT IMPLEMENTED"<<std::endl;
       break;
     }
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Made "<<nPoints-1<<" steps and stopped at(cur step) "<<svCurrent->r3<<" nOsc "<<nOsc<<std::endl;
   }
   
   return result;
 }

std::pair< TrajectoryStateOnSurface, double > SteppingHelixPropagator::propagateWithPath	(	const FreeTrajectoryState &	ftsStart,
		const Plane &	pDest
	)		const

overridevirtual

Propagate to Plane given a starting point: return final TrajectoryState and path length from start to this point

Implements Propagator.

Definition at line 93 of file SteppingHelixPropagator.cc.

References SteppingHelixStateInfo::getStateOnSurface(), initStateArraySHPSpecific(), SteppingHelixStateInfo::path(), propagate(), and setIState().

Referenced by PropagateToCal::propagate(), and propagateWithPath().

                                                  {
 
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(SteppingHelixStateInfo(ftsStart),svBuf,nPoints);
 
   StateInfo svCurrent; 
   propagate(svBuf[0], pDest, svCurrent);
 
   return TsosPP(svCurrent.getStateOnSurface(pDest), svCurrent.path());
 }

std::pair< TrajectoryStateOnSurface, double > SteppingHelixPropagator::propagateWithPath	(	const FreeTrajectoryState &	ftsStart,
		const Cylinder &	cDest
	)		const

overridevirtual

Propagate to Cylinder given a starting point: return final TrajectoryState and path length from start to this point

Implements Propagator.

Definition at line 107 of file SteppingHelixPropagator.cc.

References SteppingHelixStateInfo::getStateOnSurface(), initStateArraySHPSpecific(), SteppingHelixStateInfo::path(), propagate(), returnTangentPlane_, and setIState().

                                                     {
 
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(SteppingHelixStateInfo(ftsStart),svBuf,nPoints);
 
   StateInfo svCurrent;
   propagate(svBuf[0], cDest, svCurrent);
 
   return TsosPP(svCurrent.getStateOnSurface(cDest, returnTangentPlane_), svCurrent.path());
 }

std::pair< FreeTrajectoryState, double > SteppingHelixPropagator::propagateWithPath	(	const FreeTrajectoryState &	ftsStart,
		const GlobalPoint &	pDest
	)		const

overridevirtual

Propagate to PCA to point given a starting point.

Reimplemented from Propagator.

Definition at line 122 of file SteppingHelixPropagator.cc.

References SteppingHelixStateInfo::getFreeState(), initStateArraySHPSpecific(), SteppingHelixStateInfo::path(), propagate(), and setIState().

                                                        {
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(SteppingHelixStateInfo(ftsStart),svBuf,nPoints);
 
   StateInfo svCurrent;
   propagate(svBuf[0], pDest,svCurrent);
 
   FreeTrajectoryState ftsDest;
   svCurrent.getFreeState(ftsDest);
 
   return FtsPP(ftsDest, svCurrent.path());
 }

std::pair< FreeTrajectoryState, double > SteppingHelixPropagator::propagateWithPath	(	const FreeTrajectoryState &	ftsStart,
		const GlobalPoint &	pDest1,
		const GlobalPoint &	pDest2
	)		const

overridevirtual

Propagate to PCA to a line (given by 2 points) given a starting point.

Reimplemented from Propagator.

Definition at line 138 of file SteppingHelixPropagator.cc.

References alignCSCRings::e, SteppingHelixStateInfo::getFreeState(), initStateArraySHPSpecific(), mag(), SteppingHelixStateInfo::path(), propagate(), sendLogWarning_, and setIState().

                                                                                    {
 
   if ((pDest1-pDest2).mag() < 1e-10){
     if (sendLogWarning_){
       edm::LogWarning("SteppingHelixPropagator")<<"Can't propagate: the points should be at a bigger distance"
                         <<std::endl;
     }
     return FtsPP();
   }
   StateArray svBuf; initStateArraySHPSpecific(svBuf, true);
   int nPoints = 0;
   setIState(SteppingHelixStateInfo(ftsStart),svBuf,nPoints);
   
   StateInfo svCurrent;
   propagate(svBuf[0], pDest1, pDest2,svCurrent);
 
   FreeTrajectoryState ftsDest;
   svCurrent.getFreeState(ftsDest);
 
   return FtsPP(ftsDest, svCurrent.path());
 }

std::pair< FreeTrajectoryState, double > SteppingHelixPropagator::propagateWithPath	(	const FreeTrajectoryState &	ftsStart,
		const reco::BeamSpot &	beamSpot
	)		const

overridevirtual

Propagate to PCA to a line (given by beamSpot position and slope) given a starting point.

Reimplemented from Propagator.

Definition at line 163 of file SteppingHelixPropagator.cc.

References reco::BeamSpot::dxdz(), reco::BeamSpot::dydz(), propagateWithPath(), reco::BeamSpot::x0(), reco::BeamSpot::y0(), and reco::BeamSpot::z0().

                                                                                {
   GlobalPoint pDest1(beamSpot.x0(), beamSpot.y0(), beamSpot.z0());
   GlobalPoint pDest2(pDest1.x() + beamSpot.dxdz()*1e3, 
              pDest1.y() + beamSpot.dydz()*1e3,
              pDest1.z() + 1e3);
   return propagateWithPath(ftsStart, pDest1, pDest2);
 }

SteppingHelixPropagator::Result SteppingHelixPropagator::refToDest	(	SteppingHelixPropagator::DestType	dest,
		const SteppingHelixPropagator::StateInfo &	sv,
		const double	pars[6],
		double &	dist,
		double &	tanDist,
		PropagationDirection &	refDirection,
		double	fastSkipDist = `1e12`
	)		const

protected

(Internals) determine distance and direction from the current position to the plane

Definition at line 1667 of file SteppingHelixPropagator.cc.

Referenced by propagate(), refToMagVolume(), and refToMatVolume().

                                              {
   static const std::string metname = "SteppingHelixPropagator";
   Result result = SteppingHelixStateInfo::NOT_IMPLEMENTED;
 
   switch (dest){
   case RADIUS_DT:
     {
       double curR = sv.r3.perp();
       dist = pars[RADIUS_P] - curR;
       if (fabs(dist) > fastSkipDist){
     result = SteppingHelixStateInfo::INACC;
     break;
       }
       double curP2 = sv.p3.mag2();
       double curPtPos2 = sv.p3.perp2(); if(curPtPos2< 1e-16) curPtPos2=1e-16;
 
       double cosDPhiPR = (sv.r3.x()*sv.p3.x()+sv.r3.y()*sv.p3.y());//only the sign is needed cos((sv.r3.deltaPhi(sv.p3)));
       refDirection = dist*cosDPhiPR > 0 ?
     alongMomentum : oppositeToMomentum;
       tanDist = dist*sqrt(curP2/curPtPos2);      
       result = SteppingHelixStateInfo::OK;
     }
     break;
   case Z_DT:
     {
       double curZ = sv.r3.z();
       dist = pars[Z_P] - curZ;
       if (fabs(dist) > fastSkipDist){
     result = SteppingHelixStateInfo::INACC;
     break;
       }
       double curP = sv.p3.mag();
       refDirection = sv.p3.z()*dist > 0. ?
     alongMomentum : oppositeToMomentum;
       tanDist = dist/sv.p3.z()*curP;
       result = SteppingHelixStateInfo::OK;
     }
     break;
   case PLANE_DT:
     {
       Point rPlane(pars[0], pars[1], pars[2]);
       Vector nPlane(pars[3], pars[4], pars[5]);
       
 
       // unfortunately this doesn't work: the numbers are too large
       //      bool pVertical = fabs(pars[5])>0.9999;
       //      double dRDotN = pVertical? (sv.r3.z() - rPlane.z())*nPlane.z() :(sv.r3 - rPlane).dot(nPlane);
       double dRDotN = (sv.r3.x()-rPlane.x())*nPlane.x() + (sv.r3.y()-rPlane.y())*nPlane.y() + (sv.r3.z()-rPlane.z())*nPlane.z();//(sv.r3 - rPlane).dot(nPlane);
 
       dist = fabs(dRDotN);
       if (dist > fastSkipDist){
     result = SteppingHelixStateInfo::INACC;
     break;
       }
       double curP = sv.p3.mag();
       double p0 = curP;
       double p0Inv = 1./p0;
       Vector tau(sv.p3); tau *=p0Inv; 
       double tN =  tau.dot(nPlane);
       refDirection = tN*dRDotN < 0. ?
     alongMomentum : oppositeToMomentum;
       double b0 = sv.bf.mag();
       if (fabs(tN)>1e-24){
     tanDist = -dRDotN/tN;
       } else {
     tN = 1e-24;
     if (fabs(dRDotN)>1e-24) tanDist = 1e6;
     else tanDist = 1;
       }
       if (fabs(tanDist) > 1e4) tanDist = 1e4;
       if (b0>1.5e-6){
     double b0Inv = 1./b0;
     double tNInv = 1./tN;
     Vector bHat(sv.bf); bHat *=b0Inv;
     double bHatN = bHat.dot(nPlane);
     double cosPB = bHat.dot(tau);
     double kVal = 2.99792458e-3*sv.q*p0Inv*b0;
     double aVal = tanDist*kVal;
     Vector lVec = bHat.cross(tau);
     double bVal = lVec.dot(nPlane)*tNInv;
     if (fabs(aVal*bVal)< 0.3){
       double cVal = 1. - bHatN*cosPB*tNInv; // - sv.bf.cross(lVec).dot(nPlane)*b0Inv*tNInv; //1- bHat_n*bHat_tau/tau_n;
           double aacVal = cVal*aVal*aVal;
           if (fabs(aacVal)<1){
             double tanDCorr = bVal/2. + (bVal*bVal/2. + cVal/6)*aVal;
             tanDCorr *= aVal;
             //+ (-bVal/24. + 0.625*bVal*bVal*bVal + 5./12.*bVal*cVal)*aVal*aVal*aVal
             if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<tanDist<<" vs "
                      <<tanDist*(1.+tanDCorr)<<" corr "<<tanDist*tanDCorr<<std::endl;
             tanDist *= (1.+tanDCorr);
           } else {
             if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"AACVal "<< fabs(aacVal)
                                          <<" = "<<aVal<<"**2 * "<<cVal<<" too large:: will not converge"<<std::endl;
           }
     } else {
       if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"ABVal "<< fabs(aVal*bVal)
                        <<" = "<<aVal<<" * "<<bVal<<" too large:: will not converge"<<std::endl;
     }
       }
       result = SteppingHelixStateInfo::OK;
     }
     break;
   case CONE_DT:
     {
       Point cVertex(pars[0], pars[1], pars[2]);
       if (cVertex.perp2() < 1e-10){
     //assumes the cone axis/vertex is along z
     Vector relV3 = sv.r3 - cVertex;
     double relV3mag = relV3.mag();
     //  double relV3Theta = relV3.theta();
     double theta(pars[3]);
     //  double dTheta = theta-relV3Theta;
     double sinTheta = sin(theta);
     double cosTheta = cos(theta);
     double cosV3Theta = relV3.z()/relV3mag;
     if (cosV3Theta>1) cosV3Theta=1;
     if (cosV3Theta<-1) cosV3Theta=-1;
     double sinV3Theta = sqrt(1.-cosV3Theta*cosV3Theta);
 
     double sinDTheta = sinTheta*cosV3Theta - cosTheta*sinV3Theta;//sin(dTheta);
     double cosDTheta = cosTheta*cosV3Theta + sinTheta*sinV3Theta;//cos(dTheta);
     bool isInside = sinTheta > sinV3Theta  && cosTheta*cosV3Theta > 0;
     dist = isInside || cosDTheta > 0 ? relV3mag*sinDTheta : relV3mag;
     if (fabs(dist) > fastSkipDist){
       result = SteppingHelixStateInfo::INACC;
       break;
     }
 
     double relV3phi=relV3.phi();
     double normPhi = isInside ? 
       Geom::pi() + relV3phi : relV3phi;
     double normTheta = theta > Geom::pi()/2. ?
       ( isInside ? 1.5*Geom::pi()  - theta : theta - Geom::pi()/2. )
       : ( isInside ? Geom::pi()/2. - theta : theta + Geom::pi()/2 );
     //this is a normVector from the cone to the point
     Vector norm; norm.setRThetaPhi(fabs(dist), normTheta, normPhi);
     double curP = sv.p3.mag(); double cosp3theta = sv.p3.z()/curP; 
     if (cosp3theta>1) cosp3theta=1;
     if (cosp3theta<-1) cosp3theta=-1;
     double sineConeP = sinTheta*cosp3theta - cosTheta*sqrt(1.-cosp3theta*cosp3theta);
 
     double sinSolid = norm.dot(sv.p3)/(fabs(dist)*curP);
     tanDist = fabs(sinSolid) > fabs(sineConeP) ? dist/fabs(sinSolid) : dist/fabs(sineConeP);
 
 
     refDirection = sinSolid > 0 ?
       oppositeToMomentum : alongMomentum;
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Cone pars: theta "<<theta
                <<" normTheta "<<norm.theta()
                <<" p3Theta "<<sv.p3.theta()
                <<" sinD: "<< sineConeP
                <<" sinSolid "<<sinSolid;
     }
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"refToDest:toCone the point is "
                <<(isInside? "in" : "out")<<"side the cone"
                <<std::endl;
     }
       }
       result = SteppingHelixStateInfo::OK;
     }
     break;
     //   case CYLINDER_DT:
     //     break;
   case PATHL_DT:
     {
       double curS = fabs(sv.path());
       dist = pars[PATHL_P] - curS;
       if (fabs(dist) > fastSkipDist){
     result = SteppingHelixStateInfo::INACC;
     break;
       }
       refDirection = pars[PATHL_P] > 0 ? 
     alongMomentum : oppositeToMomentum;
       tanDist = dist;
       result = SteppingHelixStateInfo::OK;
     }
     break;
   case POINT_PCA_DT:
     {
       Point pDest(pars[0], pars[1], pars[2]);
       double curP = sv.p3.mag();
       dist = (sv.r3 - pDest).mag()+ 1e-24;//add a small number to avoid 1/0
       tanDist = (sv.r3.dot(sv.p3) - pDest.dot(sv.p3))/curP;
       //account for bending in magnetic field (quite approximate)
       double b0 = sv.bf.mag();
       if (b0>1.5e-6){
     double p0 = curP;
         double kVal = 2.99792458e-3*sv.q/p0*b0;
         double aVal = fabs(dist*kVal);
         tanDist *= 1./(1.+ aVal);
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"corrected by aVal "<<aVal<<" to "<<tanDist;
       }
       refDirection = tanDist < 0 ?
     alongMomentum : oppositeToMomentum;
       result = SteppingHelixStateInfo::OK;
     }
     break;
   case LINE_PCA_DT:
     {
       Point rLine(pars[0], pars[1], pars[2]);
       Vector dLine(pars[3], pars[4], pars[5]);
       dLine = (dLine - rLine);
       dLine *= 1./dLine.mag(); if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"dLine "<<dLine;
 
       Vector dR = sv.r3 - rLine;
       double curP = sv.p3.mag();
       Vector dRPerp = dR - dLine*(dR.dot(dLine)); 
       if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"dRperp "<<dRPerp;
 
       dist = dRPerp.mag() + 1e-24;//add a small number to avoid 1/0
       tanDist = dRPerp.dot(sv.p3)/curP;
       //angle wrt line
       double cosAlpha2 = dLine.dot(sv.p3)/curP; cosAlpha2 *= cosAlpha2;
       tanDist *= 1./sqrt(fabs(1.-cosAlpha2)+1e-96);
       //correct for dPhi in magnetic field: this isn't made quite right here 
       //(the angle between the line and the trajectory plane is neglected .. conservative)
       double b0 = sv.bf.mag();
       if (b0>1.5e-6){
     double p0 = curP;
         double kVal = 2.99792458e-3*sv.q/p0*b0;
         double aVal = fabs(dist*kVal);
     tanDist *= 1./(1.+ aVal);
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"corrected by aVal "<<aVal<<" to "<<tanDist;
       }
       refDirection = tanDist < 0 ?
     alongMomentum : oppositeToMomentum;
       result = SteppingHelixStateInfo::OK;
     }
     break;
   default:
     {
       //some large number
       dist = 1e12;
       tanDist = 1e12;
       refDirection = anyDirection;
       result = SteppingHelixStateInfo::NOT_IMPLEMENTED;
     }
     break;
   }
 
   double tanDistConstrained = tanDist;
   if (fabs(tanDist) > 4.*fabs(dist) ) tanDistConstrained *= tanDist == 0 ? 0 : fabs(dist/tanDist*4.);
 
   if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"refToDest input: dest"<<dest<<" pars[]: ";
     for (int i = 0; i < 6; i++){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<", "<<i<<" "<<pars[i];
     }
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<std::endl;
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"refToDest output: "
              <<"\t dist" << dist
              <<"\t tanDist "<< tanDist      
              <<"\t tanDistConstr "<< tanDistConstrained      
              <<"\t refDirection "<< refDirection
              <<std::endl;
   }
   tanDist = tanDistConstrained;
 
   return result;
 }

SteppingHelixPropagator::Result SteppingHelixPropagator::refToMagVolume	(	const SteppingHelixPropagator::StateInfo &	sv,
		PropagationDirection	dir,
		double &	dist,
		double &	tanDist,
		double	fastSkipDist = `1e12`,
		bool	expectNewMagVolume = `false`,
		double	maxStep = `1e12`
	)		const

protected

(Internals) determine distance and direction from the current position to the boundary of current mag volume

Definition at line 1936 of file SteppingHelixPropagator.cc.

Referenced by propagate().

                                                                                        {
 
   static const std::string metname = "SteppingHelixPropagator";
   Result result = SteppingHelixStateInfo::NOT_IMPLEMENTED;
   const MagVolume* cVol = sv.magVol;
 
   if (cVol == 0) return result;
   const std::vector<VolumeSide>& cVolFaces(cVol->faces());
 
   double distToFace[6] = {0,0,0,0,0,0};
   double tanDistToFace[6] = {0,0,0,0,0,0};
   PropagationDirection refDirectionToFace[6] = {anyDirection, anyDirection, anyDirection, anyDirection, anyDirection, anyDirection};
   Result resultToFace[6] = {result, result, result, result, result, result};
   int iFDest = -1;
   int iDistMin = -1;
   
   unsigned int iFDestSorted[6] = {0,0,0,0,0,0};
   int nDestSorted =0;
   unsigned int nearParallels = 0;
 
   double curP = sv.p3.mag();
 
   if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Trying volume "<<DDSolidShapesName::name(cVol->shapeType())
              <<" with "<<cVolFaces.size()<<" faces"<<std::endl;
   }
 
   unsigned int nFaces = cVolFaces.size();
   for (unsigned int iFace = 0; iFace < nFaces; ++iFace){
     if (iFace > 5){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Too many faces"<<std::endl;
     }
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Start with face "<<iFace<<std::endl;
     }
 //     const Plane* cPlane = dynamic_cast<const Plane*>(&cVolFaces[iFace].surface());
 //     const Cylinder* cCyl = dynamic_cast<const Cylinder*>(&cVolFaces[iFace].surface());
 //     const Cone* cCone = dynamic_cast<const Cone*>(&cVolFaces[iFace].surface());
     const Surface* cPlane = 0; //only need to know the loc->glob transform
     const Cylinder* cCyl = 0;
     const Cone* cCone = 0;
     if (typeid(cVolFaces[iFace].surface()) == typeid(const Plane&)){
       cPlane = &cVolFaces[iFace].surface();
     } else if (typeid(cVolFaces[iFace].surface()) == typeid(const Cylinder&)){
       cCyl = dynamic_cast<const Cylinder*>(&cVolFaces[iFace].surface());
     } else if (typeid(cVolFaces[iFace].surface()) == typeid(const Cone&)){
       cCone = dynamic_cast<const Cone*>(&cVolFaces[iFace].surface());
     } else {
       edm::LogWarning(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Could not cast a volume side surface to a known type"<<std::endl;
     }
     
     if (debug_){
       if (cPlane!=0) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"The face is a plane at "<<cPlane<<std::endl;
       if (cCyl!=0) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"The face is a cylinder at "<<cCyl<<std::endl;
     }
 
     double pars[6] = {0,0,0,0,0,0};
     DestType dType = UNDEFINED_DT;
     if (cPlane != 0){
       Point rPlane(cPlane->position().x(),cPlane->position().y(),cPlane->position().z());
       // = cPlane->toGlobal(LocalVector(0,0,1.)); nPlane = nPlane.unit();
       Vector nPlane(cPlane->rotation().zx(), cPlane->rotation().zy(), cPlane->rotation().zz()); nPlane /= nPlane.mag();
       
       pars[0] = rPlane.x(); pars[1] = rPlane.y(); pars[2] = rPlane.z();
       pars[3] = nPlane.x(); pars[4] = nPlane.y(); pars[5] = nPlane.z();
       dType = PLANE_DT;
     } else if (cCyl != 0){
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Cylinder at "<<cCyl->position()
              <<" rorated by "<<cCyl->rotation()
              <<std::endl;
       }
       pars[RADIUS_P] = cCyl->radius();
       dType = RADIUS_DT;
     } else if (cCone != 0){
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Cone at "<<cCone->position()
              <<" rorated by "<<cCone->rotation()
              <<" vertex at "<<cCone->vertex()
              <<" angle of "<<cCone->openingAngle()
              <<std::endl;
       }
       pars[0] = cCone->vertex().x(); pars[1] = cCone->vertex().y(); 
       pars[2] = cCone->vertex().z();
       pars[3] = cCone->openingAngle();
       dType = CONE_DT;
     } else {
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Unknown surface"<<std::endl;
       resultToFace[iFace] = SteppingHelixStateInfo::UNDEFINED;
       continue;
     }
     resultToFace[iFace] = 
       refToDest(dType, sv, pars, 
         distToFace[iFace], tanDistToFace[iFace], refDirectionToFace[iFace], fastSkipDist);    
     
     
     if (resultToFace[iFace] != SteppingHelixStateInfo::OK){
       if (resultToFace[iFace] == SteppingHelixStateInfo::INACC) result = SteppingHelixStateInfo::INACC;
     }
 
 
       
     //keep those in right direction for later use
     if (resultToFace[iFace] == SteppingHelixStateInfo::OK){
       double invDTFPosiF = 1./(1e-32+fabs(tanDistToFace[iFace]));
       double dSlope = fabs(distToFace[iFace])*invDTFPosiF;
       double maxStepL = maxStep> 100 ? 100 : maxStep; if (maxStepL < 10) maxStepL = 10.;
       bool isNearParallel = fabs(tanDistToFace[iFace]) + 100.*curP*dSlope < maxStepL //
     //a better choice is to use distance to next check of mag volume instead of 100cm; the last is for ~1.5arcLength(4T)+tandistance< maxStep
     && dSlope < 0.15 ; //
       if (refDirectionToFace[iFace] == dir || isNearParallel){
     if (isNearParallel) nearParallels++;
     iFDestSorted[nDestSorted] = iFace;
     nDestSorted++;
       }
     }
     
     //pick a shortest distance here (right dir only for now)
     if (refDirectionToFace[iFace] == dir){
       if (iDistMin == -1) iDistMin = iFace;
       else if (fabs(distToFace[iFace]) < fabs(distToFace[iDistMin])) iDistMin = iFace;
     }
     if (debug_) 
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<cVol<<" "<<iFace<<" "
                <<tanDistToFace[iFace]<<" "<<distToFace[iFace]<<" "<<refDirectionToFace[iFace]<<" "<<dir<<std::endl;
     
   }
    
   for (int i = 0;i<nDestSorted; ++i){
     int iMax = nDestSorted-i-1;
     for (int j=0;j<nDestSorted-i; ++j){
       if (fabs(tanDistToFace[iFDestSorted[j]]) > fabs(tanDistToFace[iFDestSorted[iMax]]) ){
     iMax = j;
       }
     }
     int iTmp = iFDestSorted[nDestSorted-i-1];
     iFDestSorted[nDestSorted-i-1] = iFDestSorted[iMax];
     iFDestSorted[iMax] = iTmp;
   }
 
   if (debug_){
     for (int i=0;i<nDestSorted;++i){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<cVol<<" "<<i<<" "<<iFDestSorted[i]<<" "<<tanDistToFace[iFDestSorted[i]]<<std::endl;
     }
   }
 
   //now go from the shortest to the largest distance hoping to get a point in the volume.
   //other than in case of a near-parallel travel this should stop after the first try
   
   for (int i=0; i<nDestSorted;++i){
     iFDest = iFDestSorted[i];
 
     double sign = dir == alongMomentum ? 1. : -1.;
     Point gPointEst(sv.r3);
     Vector lDelta(sv.p3); lDelta *= sign/curP*fabs(distToFace[iFDest]);
     gPointEst += lDelta;
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Linear est point "<<gPointEst
                <<" for iFace "<<iFDest<<std::endl;
     }
     GlobalPoint gPointEstNorZ(gPointEst.x(), gPointEst.y(), gPointEst.z() );
     if (  cVol->inside(gPointEstNorZ)  ){
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"The point is inside the volume"<<std::endl;
       }
       
       result = SteppingHelixStateInfo::OK;
       dist = distToFace[iFDest];
       tanDist = tanDistToFace[iFDest];
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Got a point near closest boundary -- face "<<iFDest<<std::endl;
       }
       break;
     }
   }
   
   if (result != SteppingHelixStateInfo::OK && expectNewMagVolume){
     double sign = dir == alongMomentum ? 1. : -1.;
 
     //check if it's a wrong volume situation
     if (nDestSorted-nearParallels > 0 ) result = SteppingHelixStateInfo::WRONG_VOLUME;
     else {
       //get here if all faces in the corr direction were skipped
       Point gPointEst(sv.r3);
       double lDist = iDistMin == -1 ? fastSkipDist : fabs(distToFace[iDistMin]);
       if (lDist > fastSkipDist) lDist = fastSkipDist;
       Vector lDelta(sv.p3); lDelta *= sign/curP*lDist;
       gPointEst += lDelta;
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Linear est point to shortest dist "<<gPointEst
              <<" for iFace "<<iDistMin<<" at distance "<<lDist*sign<<std::endl;
       }
       GlobalPoint gPointEstNorZ(gPointEst.x(), gPointEst.y(), gPointEst.z() );
       if ( cVol->inside(gPointEstNorZ) ){
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"The point is inside the volume"<<std::endl;
     }
     
       }else {
     result = SteppingHelixStateInfo::WRONG_VOLUME;
       }
     }
     
     if (result == SteppingHelixStateInfo::WRONG_VOLUME){
       dist = sign*0.05;
       tanDist = dist*1.01;
       if( debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Wrong volume located: return small dist, tandist"<<std::endl;
       }
     }
   }
 
   if (result == SteppingHelixStateInfo::INACC){
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"All faces are too far"<<std::endl;
   } else if (result == SteppingHelixStateInfo::WRONG_VOLUME){
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Appear to be in a wrong volume"<<std::endl;
   } else if (result != SteppingHelixStateInfo::OK){
     if (debug_) LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Something else went wrong"<<std::endl;
   }
 
   
   return result;
 }

SteppingHelixPropagator::Result SteppingHelixPropagator::refToMatVolume	(	const SteppingHelixPropagator::StateInfo &	sv,
		PropagationDirection	dir,
		double &	dist,
		double &	tanDist,
		double	fastSkipDist = `1e12`
	)		const

protected

Definition at line 2165 of file SteppingHelixPropagator.cc.

Referenced by propagate().

                                               {
 
   static const std::string metname = "SteppingHelixPropagator";
   Result result = SteppingHelixStateInfo::NOT_IMPLEMENTED;
 
   double parLim[6] = {sv.rzLims.rMin, sv.rzLims.rMax, 
               sv.rzLims.zMin, sv.rzLims.zMax, 
               sv.rzLims.th1, sv.rzLims.th2 };
 
   double distToFace[4] = {0,0,0,0};
   double tanDistToFace[4] = {0,0,0,0};
   PropagationDirection refDirectionToFace[4] = {anyDirection, anyDirection, anyDirection, anyDirection};
   Result resultToFace[4] = {result, result, result, result};
   int iFDest = -1;
   
   double curP = sv.p3.mag();
 
   for (unsigned int iFace = 0; iFace < 4; iFace++){
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Start with mat face "<<iFace<<std::endl;
     }
 
     double pars[6] = {0,0,0,0,0,0};
     DestType dType = UNDEFINED_DT;
     if (iFace > 1){
       if (fabs(parLim[iFace+2])< 1e-6){//plane
     if (sv.r3.z() < 0){
       pars[0] = 0; pars[1] = 0; pars[2] = -parLim[iFace];
       pars[3] = 0; pars[4] = 0; pars[5] = 1;
     } else {
       pars[0] = 0; pars[1] = 0; pars[2] = parLim[iFace];
       pars[3] = 0; pars[4] = 0; pars[5] = 1;
     }
     dType = PLANE_DT;
       } else {
     if (sv.r3.z() > 0){
       pars[0] = 0; pars[1] = 0; 
       pars[2] = parLim[iFace];
       pars[3] = Geom::pi()/2. - parLim[iFace+2];
     } else {
       pars[0] = 0; pars[1] = 0; 
       pars[2] = - parLim[iFace];
       pars[3] = Geom::pi()/2. + parLim[iFace+2];
     }
     dType = CONE_DT;    
       }
     } else {
       pars[RADIUS_P] = parLim[iFace];
       dType = RADIUS_DT;
     }
 
     resultToFace[iFace] = 
       refToDest(dType, sv, pars, 
         distToFace[iFace], tanDistToFace[iFace], refDirectionToFace[iFace], fastSkipDist);
     
     if (resultToFace[iFace] != SteppingHelixStateInfo::OK){
       if (resultToFace[iFace] == SteppingHelixStateInfo::INACC) result = SteppingHelixStateInfo::INACC;
       continue;
     }
     if (refDirectionToFace[iFace] == dir || fabs(distToFace[iFace]) < 2e-2*fabs(tanDistToFace[iFace]) ){
       double sign = dir == alongMomentum ? 1. : -1.;
       Point gPointEst(sv.r3);
       Vector lDelta(sv.p3); lDelta *= sign*fabs(distToFace[iFace])/curP;
       gPointEst += lDelta;
       if (debug_){
     LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Linear est point "<<gPointEst
              <<std::endl;
       }
       double lZ = fabs(gPointEst.z());
       double lR = gPointEst.perp();
       double tan4 = parLim[4] == 0 ? 0 : tan(parLim[4]);
       double tan5 = parLim[5] == 0 ? 0 : tan(parLim[5]);
       if ( (lZ - parLim[2]) > lR*tan4 
        && (lZ - parLim[3]) < lR*tan5  
        && lR > parLim[0] && lR < parLim[1]){
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"The point is inside the volume"<<std::endl;
     }
     //OK, guessed a point still inside the volume
     if (iFDest == -1){
       iFDest = iFace;
     } else {
       if (fabs(tanDistToFace[iFDest]) > fabs(tanDistToFace[iFace])){
         iFDest = iFace;
       }
     }
       } else {
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"The point is NOT inside the volume"<<std::endl;
     }
       }
     }
 
   }
   if (iFDest != -1){
     result = SteppingHelixStateInfo::OK;
     dist = distToFace[iFDest];
     tanDist = tanDistToFace[iFDest];
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Got a point near closest boundary -- face "<<iFDest<<std::endl;
     }
   } else {
     if (debug_){
       LogTrace(metname)<<std::setprecision(17)<<std::setw(20)<<std::scientific<<"Failed to find a dest point inside the volume"<<std::endl;
     }
   }
 
   return result;
 }

void SteppingHelixPropagator::setDebug ( bool debug )

inline

Switch debug printouts (to cout) .. very verbose.

Definition at line 137 of file SteppingHelixPropagator.h.

References debug, and debug_.

Referenced by SteppingHelixPropagatorESProducer::produce().

137 { debug_ = debug;}

SteppingHelixPropagator::debug_

bool debug_

Definition: SteppingHelixPropagator.h:270

debug

#define debug

Definition: HDRShower.cc:19

void SteppingHelixPropagator::setEndcapShiftsInZPosNeg	(	double	valPos,
		double	valNeg
	)

inline

set shifts in Z for endcap pieces (includes EE, HE, ME, YE)

Definition at line 180 of file SteppingHelixPropagator.h.

References ecShiftNeg_, and ecShiftPos_.

Referenced by SteppingHelixPropagatorESProducer::produce().

                                                              {
     ecShiftPos_ = valPos; ecShiftNeg_ = valNeg;
   }

void SteppingHelixPropagator::setIState	(	const SteppingHelixStateInfo &	sStart,
		StateArray &	svBuff,
		int &	nPoints
	)		const

protected

(Internals) Init starting point

Definition at line 327 of file SteppingHelixPropagator.cc.

References cIndex_(), SteppingHelixStateInfo::covCurv, SteppingHelixStateInfo::hasErrorPropagated_, SteppingHelixStateInfo::isComplete, loadState(), noErrorPropagation_, SteppingHelixStateInfo::p3, Propagator::propagationDirection(), SteppingHelixStateInfo::q, and SteppingHelixStateInfo::r3.

Referenced by propagate(), and propagateWithPath().

                                                            {
   nPoints = 0;
   svBuf[cIndex_(nPoints)] = sStart; //do this anyways to have a fresh start
   if (sStart.isComplete ) {
     svBuf[cIndex_(nPoints)] = sStart;
     nPoints++;
   } else {
     loadState(svBuf[cIndex_(nPoints)], sStart.p3, sStart.r3, sStart.q,
           propagationDirection(), sStart.covCurv);
     nPoints++;
   }
   svBuf[cIndex_(0)].hasErrorPropagated_ = sStart.hasErrorPropagated_ & !noErrorPropagation_;
 }

void SteppingHelixPropagator::setMaterialMode ( bool noMaterial )

inline

Switch for material effects mode: no material effects if true.

Definition at line 140 of file SteppingHelixPropagator.h.

References noMaterialMode_.

Referenced by MuonSimHitProducer::beginRun(), TrackDetectorAssociator::init(), HTrackAssociator::init(), SteppingHelixPropagatorESProducer::produce(), AlCaHOCalibProducer::produce(), and PropagateToCal::propagate().

140 { noMaterialMode_ = noMaterial;}

SteppingHelixPropagator::noMaterialMode_

bool noMaterialMode_

Definition: SteppingHelixPropagator.h:271

void SteppingHelixPropagator::setNoErrorPropagation ( bool noErrorPropagation )

inline

Force no error propagation.

Definition at line 143 of file SteppingHelixPropagator.h.

References noErrorPropagation_.

Referenced by SteppingHelixPropagatorESProducer::produce(), and PropagateToCal::propagate().

143 { noErrorPropagation_ = noErrorPropagation;}

SteppingHelixPropagator::noErrorPropagation_

bool noErrorPropagation_

Definition: SteppingHelixPropagator.h:272

void SteppingHelixPropagator::setRep	(	SteppingHelixPropagator::Basis &	rep,
		const SteppingHelixPropagator::Vector &	tau
	)		const

protected

Set/compute basis vectors for local coordinates at current step (called by incrementState)

Definition at line 865 of file SteppingHelixPropagator.cc.

References SteppingHelixPropagator::Basis::lX, SteppingHelixPropagator::Basis::lY, SteppingHelixPropagator::Basis::lZ, and metsig::tau.

Referenced by makeAtomStep().

                                                                     {
   Vector zRep(0., 0., 1.);
   rep.lX = tau;
   rep.lY = zRep.cross(tau); rep.lY *= 1./tau.perp();
   rep.lZ = rep.lX.cross(rep.lY);
 }

void SteppingHelixPropagator::setReturnTangentPlane ( bool val )

inline

flag to return tangent plane for non-plane input

Definition at line 158 of file SteppingHelixPropagator.h.

References returnTangentPlane_.

Referenced by SteppingHelixPropagatorESProducer::produce().

158 { returnTangentPlane_ = val;}

SteppingHelixPropagator::returnTangentPlane_

bool returnTangentPlane_

Definition: SteppingHelixPropagator.h:278

void SteppingHelixPropagator::setSendLogWarning ( bool val )

inline

flag to send LogWarning on failures

Definition at line 161 of file SteppingHelixPropagator.h.

References sendLogWarning_.

Referenced by SteppingHelixPropagatorESProducer::produce().

161 { sendLogWarning_ = val;}

SteppingHelixPropagator::sendLogWarning_

bool sendLogWarning_

Definition: SteppingHelixPropagator.h:279

void SteppingHelixPropagator::setUseInTeslaFromMagField ( bool val )

inline

force getting field value from MagneticField, not the geometric one

Definition at line 177 of file SteppingHelixPropagator.h.

References useInTeslaFromMagField_.

Referenced by SteppingHelixPropagatorESProducer::produce().

177 { useInTeslaFromMagField_ = val;}

SteppingHelixPropagator::useInTeslaFromMagField_

bool useInTeslaFromMagField_

Definition: SteppingHelixPropagator.h:277

void SteppingHelixPropagator::setUseIsYokeFlag ( bool val )

inline

(temporary?) flag to identify if the volume is yoke based on MagVolume internals works if useMatVolumes_ is also true

Definition at line 165 of file SteppingHelixPropagator.h.

References useIsYokeFlag_.

Referenced by SteppingHelixPropagatorESProducer::produce().

165 { useIsYokeFlag_ = val;}

SteppingHelixPropagator::useIsYokeFlag_

bool useIsYokeFlag_

Definition: SteppingHelixPropagator.h:275

void SteppingHelixPropagator::setUseMagVolumes ( bool val )

inline

Switch to using MagneticField Volumes .. as in VolumeBasedMagneticField.

Definition at line 152 of file SteppingHelixPropagator.h.

References useMagVolumes_.

Referenced by SteppingHelixPropagatorESProducer::produce().

152 { useMagVolumes_ = val;}

SteppingHelixPropagator::useMagVolumes_

bool useMagVolumes_

Definition: SteppingHelixPropagator.h:274

void SteppingHelixPropagator::setUseMatVolumes ( bool val )

inline

Switch to using Material Volumes .. internally defined for now.

Definition at line 155 of file SteppingHelixPropagator.h.

References useMatVolumes_.

Referenced by SteppingHelixPropagatorESProducer::produce().

155 { useMatVolumes_ = val;}

SteppingHelixPropagator::useMatVolumes_

bool useMatVolumes_

Definition: SteppingHelixPropagator.h:276

void SteppingHelixPropagator::setUseTuningForL2Speed ( bool val )

inline

will use bigger steps ~tuned for good-enough L2/Standalone reco use this in hope of a speed-up

Definition at line 169 of file SteppingHelixPropagator.h.

References useTuningForL2Speed_.

Referenced by SteppingHelixPropagatorESProducer::produce().

169 { useTuningForL2Speed_ = val;}

SteppingHelixPropagator::useTuningForL2Speed_

bool useTuningForL2Speed_

Definition: SteppingHelixPropagator.h:280

void SteppingHelixPropagator::setVBFPointer ( const VolumeBasedMagneticField * val )

inline

set VolumBasedField pointer allows to have geometry description in uniformField scenario only important/relevant in the barrel region

Definition at line 174 of file SteppingHelixPropagator.h.

References vbField_.

Referenced by SteppingHelixPropagatorESProducer::produce().

174 { vbField_ = val;}

SteppingHelixPropagator::vbField_

const VolumeBasedMagneticField * vbField_

Definition: SteppingHelixPropagator.h:268

Member Data Documentation

bool SteppingHelixPropagator::applyRadX0Correction_

private

Definition at line 273 of file SteppingHelixPropagator.h.

Referenced by applyRadX0Correction(), makeAtomStep(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::debug_

private

Definition at line 270 of file SteppingHelixPropagator.h.

Referenced by getNextState(), isYokeVolume(), loadState(), makeAtomStep(), propagate(), refToDest(), refToMagVolume(), refToMatVolume(), setDebug(), and SteppingHelixPropagator().

double SteppingHelixPropagator::defaultStep_

private

Definition at line 282 of file SteppingHelixPropagator.h.

Referenced by propagate(), and SteppingHelixPropagator().

double SteppingHelixPropagator::ecShiftNeg_

private

Definition at line 285 of file SteppingHelixPropagator.h.

Referenced by getDeDx(), setEndcapShiftsInZPosNeg(), and SteppingHelixPropagator().

double SteppingHelixPropagator::ecShiftPos_

private

Definition at line 284 of file SteppingHelixPropagator.h.

Referenced by getDeDx(), setEndcapShiftsInZPosNeg(), and SteppingHelixPropagator().

const MagneticField* SteppingHelixPropagator::field_

private

Definition at line 267 of file SteppingHelixPropagator.h.

Referenced by getNextState(), loadState(), magneticField(), makeAtomStep(), propagate(), and SteppingHelixPropagator().

StateInfo SteppingHelixPropagator::invalidState_

private

Definition at line 265 of file SteppingHelixPropagator.h.

Referenced by propagate().

const int SteppingHelixPropagator::MAX_POINTS = 7

staticprotected

Definition at line 186 of file SteppingHelixPropagator.h.

Referenced by cIndex_(), and initStateArraySHPSpecific().

const int SteppingHelixPropagator::MAX_STEPS = 10000

staticprivate

Definition at line 261 of file SteppingHelixPropagator.h.

Referenced by propagate().

bool SteppingHelixPropagator::noErrorPropagation_

private

Definition at line 272 of file SteppingHelixPropagator.h.

Referenced by initStateArraySHPSpecific(), setIState(), setNoErrorPropagation(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::noMaterialMode_

private

Definition at line 271 of file SteppingHelixPropagator.h.

Referenced by getDeDx(), setMaterialMode(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::returnTangentPlane_

private

Definition at line 278 of file SteppingHelixPropagator.h.

Referenced by propagateWithPath(), setReturnTangentPlane(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::sendLogWarning_

private

Definition at line 279 of file SteppingHelixPropagator.h.

Referenced by propagate(), propagateWithPath(), setSendLogWarning(), and SteppingHelixPropagator().

const AlgebraicSymMatrix55 SteppingHelixPropagator::unit55_

private

Definition at line 269 of file SteppingHelixPropagator.h.

Referenced by makeAtomStep().

bool SteppingHelixPropagator::useInTeslaFromMagField_

private

Definition at line 277 of file SteppingHelixPropagator.h.

Referenced by getNextState(), loadState(), makeAtomStep(), setUseInTeslaFromMagField(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::useIsYokeFlag_

private

Definition at line 275 of file SteppingHelixPropagator.h.

Referenced by getDeDx(), getNextState(), loadState(), propagate(), setUseIsYokeFlag(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::useMagVolumes_

private

Definition at line 274 of file SteppingHelixPropagator.h.

Referenced by getDeDx(), getNextState(), loadState(), makeAtomStep(), propagate(), setUseMagVolumes(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::useMatVolumes_

private

Definition at line 276 of file SteppingHelixPropagator.h.

Referenced by propagate(), setUseMatVolumes(), and SteppingHelixPropagator().

bool SteppingHelixPropagator::useTuningForL2Speed_

private

Definition at line 280 of file SteppingHelixPropagator.h.

Referenced by propagate(), setUseTuningForL2Speed(), and SteppingHelixPropagator().

const VolumeBasedMagneticField* SteppingHelixPropagator::vbField_

private

Definition at line 268 of file SteppingHelixPropagator.h.

Referenced by getNextState(), loadState(), setVBFPointer(), and SteppingHelixPropagator().

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