#include <PixelCPEGeneric.h>

Inheritance diagram for PixelCPEGeneric:

Public Member Functions
LocalError	localError (const SiPixelCluster &cl, const GeomDetUnit &det) const

LocalPoint	localPosition (const SiPixelCluster &cluster, const GeomDetUnit &det) const

MeasurementPoint	measurementPosition (const SiPixelCluster &, const GeomDetUnit &det) const

	PixelCPEGeneric (edm::ParameterSet const &conf, const MagneticField , const SiPixelLorentzAngle , const SiPixelCPEGenericErrorParm , const SiPixelTemplateDBObject )
	The constructor. More...

	~PixelCPEGeneric ()

Public Member Functions inherited from PixelCPEBase
unsigned int	clusterProbComputationFlag () const

bool	hasBadPixels () const

bool	hasFilledProb () const

bool	isOnEdge () const

LocalValues	localParameters (const SiPixelCluster &cl, const GeomDetUnit &det) const

LocalValues	localParameters (const SiPixelCluster &cl, const GeomDetUnit &det, const LocalTrajectoryParameters &ltp) const

LocalValues	localParameters (const SiPixelCluster &cl, const GeomDetUnit &det, float alpha, float beta) const

	PixelCPEBase (edm::ParameterSet const &conf, const MagneticField mag=0, const SiPixelLorentzAngle lorentzAngle=0, const SiPixelCPEGenericErrorParm genErrorParm=0, const SiPixelTemplateDBObject templateDBobject=0)

float	probabilityQ () const

float	probabilityX () const

float	probabilityXY () const

float	probabilityY () const

float	qBin () const

SiPixelRecHitQuality::QualWordType	rawQualityWord () const

void	setMagField (const MagneticField *mag) const

bool	spansTwoRocks () const

Public Member Functions inherited from PixelClusterParameterEstimator
unsigned int	clusterProbComputationFlag () const

	PixelClusterParameterEstimator ()

Public Member Functions inherited from ClusterParameterEstimator< SiPixelCluster >
virtual void	clearParameters () const

virtual void	enterLocalParameters (unsigned int id, std::pair< int, int > &row_col, LocalValues pos_err_info) const

virtual void	enterLocalParameters (uint32_t id, uint16_t firstStrip, LocalValues pos_err_info) const

virtual LocalValues	localParameters (const SiPixelCluster &cluster, const GeomDetUnit &gd, const TrajectoryStateOnSurface &tsos) const

virtual VLocalValues	localParametersV (const SiPixelCluster &cluster, const GeomDetUnit &gd) const

virtual VLocalValues	localParametersV (const SiPixelCluster &cluster, const GeomDetUnit &gd, const TrajectoryStateOnSurface &tsos) const

virtual	~ClusterParameterEstimator ()

Protected Member Functions
float	xpos (const SiPixelCluster &) const

float	ypos (const SiPixelCluster &) const

Protected Member Functions inherited from PixelCPEBase
void	computeAnglesFromDetPosition (const SiPixelCluster &cl, const GeomDetUnit &det) const

void	computeAnglesFromTrajectory (const SiPixelCluster &cl, const GeomDetUnit &det, const LocalTrajectoryParameters &ltp) const

void	computeLorentzShifts () const

LocalVector	driftDirection (GlobalVector bfield) const

LocalVector	driftDirectionCorrect (GlobalVector bfield) const

bool	isFlipped () const

virtual float	lorentzShiftX () const

virtual float	lorentzShiftY () const

MeasurementError	measurementError (const SiPixelCluster &, const GeomDetUnit &det) const

MeasurementPoint	measurementPosition (const SiPixelCluster &, const GeomDetUnit &det) const

void	setTheDet (const GeomDetUnit &det, const SiPixelCluster &cluster) const

void	xCharge (const std::vector< SiPixelCluster::Pixel > &, const int &, const int &, float &q1, float &q2) const

void	yCharge (const std::vector< SiPixelCluster::Pixel > &, const int &, const int &, float &q1, float &q2) const

Private Member Functions
void	collect_edge_charges (const SiPixelCluster &cluster, float &Q_f_X, float &Q_l_X, float &Q_m_X, float &Q_f_Y, float &Q_l_Y, float &Q_m_Y) const

float	err2X (bool &, int &) const

float	err2Y (bool &, int &) const

double	generic_position_formula (int size, double Q_f, double Q_l, double upper_edge_first_pix, double lower_edge_last_pix, double half_lorentz_shift, double cot_angle, double pitch, bool first_is_big, bool last_is_big, double eff_charge_cut_low, double eff_charge_cut_high, double size_cut) const

Private Attributes
float	deltax

float	deltay

bool	DoCosmics_

float	dx1

float	dx2

float	dy1

float	dy2

double	EdgeClusterErrorX_

double	EdgeClusterErrorY_

SiPixelCPEGenericDBErrorParametrization *	genErrorsFromDB_

bool	inflate_all_errors_no_trk_angle

bool	inflate_errors

bool	IrradiationBiasCorrection_

bool	LoadTemplatesFromDB_

float	pixmx

float	sigmax

float	sigmay

float	sx1

float	sx2

float	sy1

float	sy2

SiPixelTemplate	templ_

int	templID_

double	the_eff_charge_cut_highX

double	the_eff_charge_cut_highY

double	the_eff_charge_cut_lowX

double	the_eff_charge_cut_lowY

double	the_size_cutX

double	the_size_cutY

bool	TruncatePixelCharge_

bool	UseErrorsFromTemplates_

Additional Inherited Members
Public Types inherited from ClusterParameterEstimator< SiPixelCluster >
typedef std::pair< LocalPoint, LocalError >	LocalValues

typedef std::vector< LocalValues >	VLocalValues

Protected Types inherited from PixelCPEBase
typedef GloballyPositioned < double >	Frame

Protected Attributes inherited from PixelCPEBase
bool	alpha2Order

float	alpha_

float	beta_

unsigned int	clusterProbComputationFlag_

float	cotalpha_

float	cotbeta_

LocalVector	driftDirection_

const SiPixelCPEGenericErrorParm *	genErrorParm_

bool	hasBadPixels_

bool	hasFilledProb_

bool	isOnEdge_

LocalTrajectoryParameters	loc_traj_param_

Topology::LocalTrackPred	loc_trk_pred_

const SiPixelLorentzAngle *	lorentzAngle_

double	lorentzShiftInCmX_

double	lorentzShiftInCmY_

double	lorentzShiftX_

double	lorentzShiftY_

const MagneticField *	magfield_

int	nRecHitsTotal_

int	nRecHitsUsedEdge_

float	probabilityQ_

float	probabilityX_

float	probabilityY_

float	qBin_

bool	spansTwoROCs_

const SiPixelTemplateDBObject *	templateDBobject_

const PixelGeomDetUnit *	theDet

float	theDetR

float	theDetZ

float	theLShiftX

float	theLShiftY

float	theNumOfCol

float	theNumOfRow

GeomDetType::SubDetector	thePart

float	thePitchX

float	thePitchY

float	theSign

float	theThickness

const PixelTopology *	theTopol

int	theVerboseLevel

float	trk_lp_x

float	trk_lp_y

bool	with_track_angle

Protected Attributes inherited from PixelClusterParameterEstimator
unsigned int	clusterProbComputationFlag_

Detailed Description

Definition at line 62 of file PixelCPEGeneric.h.

Constructor & Destructor Documentation

PixelCPEGeneric::PixelCPEGeneric	(	edm::ParameterSet const &	conf,
		const MagneticField *	mag,
		const SiPixelLorentzAngle *	lorentzAngle,
		const SiPixelCPEGenericErrorParm *	genErrorParm,
		const SiPixelTemplateDBObject *	templateDBobject
	)

The constructor.

Definition at line 23 of file PixelCPEGeneric.cc.

References DoCosmics_, EdgeClusterErrorX_, EdgeClusterErrorY_, edm::hlt::Exception, edm::ParameterSet::getParameter(), inflate_all_errors_no_trk_angle, inflate_errors, IrradiationBiasCorrection_, LoadTemplatesFromDB_, LogDebug, SiPixelTemplate::pushfile(), templ_, PixelCPEBase::templateDBobject_, templID_, the_eff_charge_cut_highX, the_eff_charge_cut_highY, the_eff_charge_cut_lowX, the_eff_charge_cut_lowY, the_size_cutX, the_size_cutY, PixelCPEBase::theVerboseLevel, TruncatePixelCharge_, and UseErrorsFromTemplates_.

   : PixelCPEBase(conf, mag, lorentzAngle, genErrorParm, templateDBobject)
 {
   
   if (theVerboseLevel > 0) 
     LogDebug("PixelCPEGeneric") 
       << " constructing a generic algorithm for ideal pixel detector.\n"
       << " CPEGeneric:: VerboseLevel = " << theVerboseLevel;
 
   // Externally settable cuts  
   the_eff_charge_cut_lowX = conf.getParameter<double>("eff_charge_cut_lowX");
   the_eff_charge_cut_lowY = conf.getParameter<double>("eff_charge_cut_lowY");
   the_eff_charge_cut_highX = conf.getParameter<double>("eff_charge_cut_highX");
   the_eff_charge_cut_highY = conf.getParameter<double>("eff_charge_cut_highY");
   the_size_cutX = conf.getParameter<double>("size_cutX");
   the_size_cutY = conf.getParameter<double>("size_cutY");
 
   EdgeClusterErrorX_ = conf.getParameter<double>("EdgeClusterErrorX");
   EdgeClusterErrorY_ = conf.getParameter<double>("EdgeClusterErrorY");
 
   // Externally settable flags to inflate errors
   inflate_errors = conf.getParameter<bool>("inflate_errors");
   inflate_all_errors_no_trk_angle = conf.getParameter<bool>("inflate_all_errors_no_trk_angle");
 
   UseErrorsFromTemplates_    = conf.getParameter<bool>("UseErrorsFromTemplates");
   TruncatePixelCharge_       = conf.getParameter<bool>("TruncatePixelCharge");
   IrradiationBiasCorrection_ = conf.getParameter<bool>("IrradiationBiasCorrection");
   DoCosmics_                 = conf.getParameter<bool>("DoCosmics");
   LoadTemplatesFromDB_       = conf.getParameter<bool>("LoadTemplatesFromDB");
 
   if ( !UseErrorsFromTemplates_ && ( TruncatePixelCharge_       || 
                      IrradiationBiasCorrection_ || 
                      DoCosmics_                 ||
                      LoadTemplatesFromDB_ ) )
     {
       throw cms::Exception("PixelCPEGeneric::PixelCPEGeneric: ") 
       << "\nERROR: UseErrorsFromTemplates_ is set to False in PixelCPEGeneric_cfi.py. "
       << " In this case it does not make sense to set any of the following to True: " 
       << " TruncatePixelCharge_, IrradiationBiasCorrection_, DoCosmics_, LoadTemplatesFromDB_ !!!" 
       << "\n\n";
     }
 
   if ( UseErrorsFromTemplates_ )
     {
         templID_ = -999;
         if ( LoadTemplatesFromDB_ )
         {
             // Initialize template store to the selected ID [Morris, 6/25/08]  
             if ( !templ_.pushfile( *templateDBobject_) )
                 throw cms::Exception("InvalidCalibrationLoaded") 
                     << "ERROR: Templates not filled correctly. Check the sqlite file. Using SiPixelTemplateDBObject version " 
                     << ( *templateDBobject_ ).version() << ". Template ID is " << templID_;
         }
         else 
         {
             if ( !templ_.pushfile( templID_ ) )
                 throw cms::Exception("InvalidCalibrationLoaded") 
                     << "ERROR: Templates not loaded correctly from text file. Reconstruction will fail." << " Template ID is " << templID_;
         }
         
     } // if ( UseErrorsFromTemplates_ )
   
   //cout << endl;
   //cout << "From PixelCPEGeneric::PixelCPEGeneric(...)" << endl;
   //cout << "(int)UseErrorsFromTemplates_ = " << (int)UseErrorsFromTemplates_    << endl;
   //cout << "TruncatePixelCharge_         = " << (int)TruncatePixelCharge_       << endl;      
   //cout << "IrradiationBiasCorrection_   = " << (int)IrradiationBiasCorrection_ << endl;
   //cout << "(int)DoCosmics_              = " << (int)DoCosmics_                 << endl;
   //cout << "(int)LoadTemplatesFromDB_    = " << (int)LoadTemplatesFromDB_       << endl;
   //cout << endl;
 
 }

PixelCPEGeneric::~PixelCPEGeneric ( )

inline

Definition at line 67 of file PixelCPEGeneric.h.

67 {;}

Member Function Documentation

void PixelCPEGeneric::collect_edge_charges	(	const SiPixelCluster &	cluster,
		float &	Q_f_X,
		float &	Q_l_X,
		float &	Q_m_X,
		float &	Q_f_Y,
		float &	Q_l_Y,
		float &	Q_m_Y
	)		const

private

Collect the edge charges in x and y, in a single pass over the pixel vector. Calculate charge in the first and last pixel projected in x and y and the inner cluster charge, projected in x and y.

Parameters

cluster	input, the cluster
Q_f_X	output, Q first in X
Q_l_X	output, Q last in X
Q_m_X	output, Q middle in X
Q_f_Y	output, Q first in Y
Q_l_Y	output, Q last in Y
Q_m_Y	output, Q middle in Y

Definition at line 482 of file PixelCPEGeneric.cc.

References ecalMGPA::adc(), i, SiPixelCluster::maxPixelCol(), SiPixelCluster::maxPixelRow(), min, SiPixelCluster::minPixelCol(), SiPixelCluster::minPixelRow(), SiPixelCluster::pixels(), pixmx, TruncatePixelCharge_, UseErrorsFromTemplates_, vdt::x, and detailsBasic3DVector::y.

Referenced by localPosition().

 {
   // Initialize return variables.
   Q_f_X = Q_l_X = Q_m_X = 0.0;
   Q_f_Y = Q_l_Y = Q_m_Y = 0.0;
 
   // Fetch the pixels vector from the cluster.
   const vector<SiPixelCluster::Pixel>& pixelsVec = cluster.pixels();
 
   // Obtain boundaries in index units
   int xmin = cluster.minPixelRow();
   int xmax = cluster.maxPixelRow();
   int ymin = cluster.minPixelCol();
   int ymax = cluster.maxPixelCol();
 
 //   // Obtain the cluster boundaries (note: in measurement units!)
 //   float xmin = cluster.minPixelRow()+0.5;
 //   float xmax = cluster.maxPixelRow()+0.5;  
 //   float ymin = cluster.minPixelCol()+0.5;
 //   float ymax = cluster.maxPixelCol()+0.5;
   
   // Iterate over the pixels.
   int isize = pixelsVec.size();
   
   for (int i = 0;  i < isize; ++i) 
     {
       float pix_adc = -999.9;
 
       // ggiurgiu@fnal.gov: add pixel charge truncation
       if ( UseErrorsFromTemplates_ && TruncatePixelCharge_ ) 
     pix_adc = min( (float)(pixelsVec[i].adc), pixmx );
       else 
     pix_adc = pixelsVec[i].adc;
 
       //
       // X projection
       if      ( pixelsVec[i].x == xmin )       // need to match with tolerance!!! &&&
     Q_f_X += pix_adc;
       else if ( pixelsVec[i].x == xmax ) 
     Q_l_X += pix_adc;
       else 
     Q_m_X += pix_adc;
       //
       // Y projection
       if      ( pixelsVec[i].y == ymin ) 
     Q_f_Y += pix_adc;
       else if ( pixelsVec[i].y == ymax ) 
     Q_l_Y += pix_adc;
       else 
     Q_m_Y += pix_adc;
     }
   
   return;
 } 

float PixelCPEGeneric::err2X	(	bool &	,
		int &
	)		const

private

float PixelCPEGeneric::err2Y	(	bool &	,
		int &
	)		const

private

double PixelCPEGeneric::generic_position_formula	(	int	size,
		double	Q_f,
		double	Q_l,
		double	upper_edge_first_pix,
		double	lower_edge_last_pix,
		double	half_lorentz_shift,
		double	cot_angle,
		double	pitch,
		bool	first_is_big,
		bool	last_is_big,
		double	eff_charge_cut_low,
		double	eff_charge_cut_high,
		double	size_cut
	)		const

private

A generic version of the position formula. Since it works for both X and Y, in the interest of the simplicity of the code, all parameters are passed by the caller. The only class variable used by this method is the theThickness, since that's common for both X and Y.

Parameters

size	Size of this projection.
Q_f	Charge in the first pixel.
Q_l	Charge in the last pixel.
upper_edge_first_pix	As the name says.
lower_edge_last_pix	As the name says.
half_lorentz_shift	L-shift at half thickness
cot_angle	cot of alpha_ or beta_
pitch	thePitchX or thePitchY
first_is_big	true if the first is big
last_is_big	true if the last is big
eff_charge_cut_low	Use edge if > W_eff (in pix) &&&
eff_charge_cut_high	Use edge if < W_eff (in pix) &&&
size_cut	Use edge when size == cuts

Definition at line 360 of file PixelCPEGeneric.cc.

References gather_cfg::cout, IrradiationBiasCorrection_, PixelCPEBase::nRecHitsTotal_, PixelCPEBase::nRecHitsUsedEdge_, GeomDetEnumerators::PixelBarrel, PixelCPEBase::thePart, PixelCPEBase::theThickness, and PixelCPEBase::theVerboseLevel.

Referenced by localPosition().

 {
   double geom_center = 0.5 * ( upper_edge_first_pix + lower_edge_last_pix );
 
   //--- The case of only one pixel in this projection is separate.  Note that
   //--- here first_pix == last_pix, so the average of the two is still the
   //--- center of the pixel.
   if ( size == 1 ) 
     {
       // ggiurgiu@jhu.edu, 02/03/09 : for size = 1, the Lorentz shift is already accounted by the irradiation correction
       if ( IrradiationBiasCorrection_ ) 
     return geom_center;
       else
     return geom_center + half_lorentz_shift;
     }
 
 
   //--- Width of the clusters minus the edge (first and last) pixels.
   //--- In the note, they are denoted x_F and x_L (and y_F and y_L)
   double W_inner      = lower_edge_last_pix - upper_edge_first_pix;  // in cm
 
 
   //--- Predicted charge width from geometry
   double W_pred = 
     theThickness * cot_angle                     // geometric correction (in cm)
     - 2 * half_lorentz_shift;                    // (in cm) &&& check fpix!  
   
 
   //--- Total length of the two edge pixels (first+last)
   double sum_of_edge = 0.0;
   if (first_is_big) sum_of_edge += 2.0;
   else              sum_of_edge += 1.0;
   
   if (last_is_big)  sum_of_edge += 2.0;
   else              sum_of_edge += 1.0;
   
 
   //--- The `effective' charge width -- particle's path in first and last pixels only
   double W_eff = fabs( W_pred ) - W_inner;
 
 
   //--- If the observed charge width is inconsistent with the expectations
   //--- based on the track, do *not* use W_pred-W_innner.  Instead, replace
   //--- it with an *average* effective charge width, which is the average
   //--- length of the edge pixels.
   //
   bool usedEdgeAlgo = false;
   if (( W_eff/pitch < eff_charge_cut_low ) ||
       ( W_eff/pitch > eff_charge_cut_high ) || (size >= size_cut)) 
     {
       W_eff = pitch * 0.5 * sum_of_edge;  // ave. length of edge pixels (first+last) (cm)
       usedEdgeAlgo = true;
       nRecHitsUsedEdge_++;
     }
 
   
   //--- Finally, compute the position in this projection
   double Qdiff = Q_l - Q_f;
   double Qsum  = Q_l + Q_f;
 
     //--- Temporary fix for clusters with both first and last pixel with charge = 0
     if(Qsum==0) Qsum=1.0;
   double hit_pos = geom_center + 0.5*(Qdiff/Qsum) * W_eff + half_lorentz_shift;
 
   //--- Debugging output
   if (theVerboseLevel > 20) {
     if ( thePart == GeomDetEnumerators::PixelBarrel ) {
       cout << "\t >>> We are in the Barrel." ;
     } else {
       cout << "\t >>> We are in the Forward." ;
     }
     cout 
       << "\n\t >>> cot(angle) = " << cot_angle << "  pitch = " << pitch << "  size = " << size
       << "\n\t >>> upper_edge_first_pix = " << upper_edge_first_pix
       << "\n\t >>> lower_edge_last_pix  = " << lower_edge_last_pix
       << "\n\t >>> geom_center          = " << geom_center
       << "\n\t >>> half_lorentz_shift   = " << half_lorentz_shift
       << "\n\t >>> W_inner              = " << W_inner
       << "\n\t >>> W_pred               = " << W_pred
       << "\n\t >>> W_eff(orig)          = " << fabs( W_pred ) - W_inner
       << "\n\t >>> W_eff(used)          = " << W_eff
       << "\n\t >>> sum_of_edge          = " << sum_of_edge
       << "\n\t >>> Qdiff = " << Qdiff << "  Qsum = " << Qsum 
       << "\n\t >>> hit_pos              = " << hit_pos 
       << "\n\t >>> RecHits: total = " << nRecHitsTotal_ 
       << "  used edge = " << nRecHitsUsedEdge_
       << endl;
     if (usedEdgeAlgo) 
       cout << "\n\t >>> Used Edge algorithm." ;
     else
       cout << "\n\t >>> Used angle information." ;
     cout << endl;
   }
 
 
   return hit_pos;
 }

LocalError PixelCPEGeneric::localError	(	const SiPixelCluster &	cl,
		const GeomDetUnit &	det
	)		const

virtual

Implements PixelCPEBase.

Definition at line 551 of file PixelCPEGeneric.cc.

References PixelCPEBase::alpha_, PixelCPEBase::beta_, PixelTopology::containsBigPixelInX(), PixelTopology::containsBigPixelInY(), DoCosmics_, EdgeClusterErrorX_, EdgeClusterErrorY_, edm::hlt::Exception, PixelCPEBase::genErrorParm_, genErrorsFromDB_, SiPixelCPEGenericDBErrorParametrization::getError(), inflate_errors, PixelTopology::isItBigPixelInX(), PixelTopology::isItBigPixelInY(), PixelTopology::isItEdgePixelInX(), PixelTopology::isItEdgePixelInY(), LogDebug, SiPixelCluster::maxPixelCol(), SiPixelCluster::maxPixelRow(), micronsToCm, SiPixelCluster::minPixelCol(), SiPixelCluster::minPixelRow(), GeomDetEnumerators::PixelBarrel, PixelCPEBase::qBin_, PixelCPEBase::setTheDet(), sigmax, sigmay, SiPixelCluster::sizeX(), SiPixelCluster::sizeY(), mathSSE::sqrt(), sx1, sx2, sy1, sy2, PixelCPEBase::thePart, PixelCPEBase::thePitchX, PixelCPEBase::thePitchY, PixelCPEBase::theTopol, PixelCPEBase::theVerboseLevel, UseErrorsFromTemplates_, and PixelCPEBase::with_track_angle.

 {
   setTheDet( det, cluster );
 
   // The squared errors
   float xerr_sq = -99999.9;
   float yerr_sq = -99999.9;
 
   int sizex = cluster.sizeX();
   int sizey = cluster.sizeY();
    
   // Default errors are the maximum error used for edge clusters.
   /*
     int row_offset = cluster.minPixelRow();
     int col_offset = cluster.minPixelCol();
     int n_bigInX = 0;
     for (int irow = 0; irow < sizex; ++irow)
     if ( theTopol->isItBigPixelInX( irow+row_offset ) )
     ++n_bigInX;
     int n_bigInY = 0;
     for (int icol = 0; icol < sizey; ++icol) 
     if ( theTopol->isItBigPixelInY( icol+col_offset ) )
     ++n_bigInX;
     float xerr = (float)(sizex + n_bigInX) * thePitchX / sqrt(12.0);      
     float yerr = (float)(sizey + n_bigInY) * thePitchY / sqrt(12.0); 
   */
 
   // These are determined by looking at residuals for edge clusters
   const float micronsToCm = 1.0e-4;
   float xerr = EdgeClusterErrorX_ * micronsToCm;
   float yerr = EdgeClusterErrorY_ * micronsToCm;
   
   // Find if cluster is at the module edge. 
   int maxPixelCol = cluster.maxPixelCol();
   int maxPixelRow = cluster.maxPixelRow();
   int minPixelCol = cluster.minPixelCol();
   int minPixelRow = cluster.minPixelRow();       
   bool edgex = ( theTopol->isItEdgePixelInX( minPixelRow ) ) || ( theTopol->isItEdgePixelInX( maxPixelRow ) );
   bool edgey = ( theTopol->isItEdgePixelInY( minPixelCol ) ) || ( theTopol->isItEdgePixelInY( maxPixelCol ) );
 
   // Find if cluster contains double (big) pixels. 
   bool bigInX = theTopol->containsBigPixelInX( minPixelRow, maxPixelRow );   
   bool bigInY = theTopol->containsBigPixelInY( minPixelCol, maxPixelCol );
 
   if ( !with_track_angle && DoCosmics_ )
     {
       //cout << "Track angles are not known and we are processing cosmics." << endl; 
       //cout << "Default angle estimation which assumes track from PV (0,0,0) does not work." << endl;
       //cout << "Use an error parameterization which only depends on cluster size (by Vincenzo Chiochia)." << endl; 
       
       if ( thePart == GeomDetEnumerators::PixelBarrel ) 
     {
       if ( !edgex )
         {
           if      ( sizex == 1 ) xerr = 0.00115; // Size = 1 -> Sigma = 11.5 um 
           else if ( sizex == 2 ) xerr = 0.00120; // Size = 2 -> Sigma = 12.0 um      
           else if ( sizex == 3 ) xerr = 0.00088; // Size = 3 -> Sigma =  8.8 um
           else                   xerr = 0.01030;
         }
       
       if ( !edgey )
         {
           if      ( sizey ==  1 ) yerr = 0.00375; // 37.5 um 
           else if ( sizey ==  2 ) yerr = 0.00230; // 23 um      
           else if ( sizey ==  3 ) yerr = 0.00250; // 25 um
           else if ( sizey ==  4 ) yerr = 0.00250; // 25 um
           else if ( sizey ==  5 ) yerr = 0.00230; // 23 um
           else if ( sizey ==  6 ) yerr = 0.00230; // 23 um
           else if ( sizey ==  7 ) yerr = 0.00210; // 21 um
           else if ( sizey ==  8 ) yerr = 0.00210; // 21 um
           else if ( sizey ==  9 ) yerr = 0.00240; // 24 um
           else                    yerr = 0.00210; // 21um
         }
     } 
       else // EndCap
     {
       if ( !edgex )
         {
           if      ( sizex == 1 ) xerr = 0.0020;
           else if ( sizex == 2 ) xerr = 0.0020;
           else                   xerr = 0.0020;
         }
     
       if ( !edgey )
         {
           if  ( sizey == 1 ) yerr = 0.00210; // 21 um
           else               yerr = 0.00075; // 7.5 um
         }
     }
 
     } // if ( !with_track_angle )
   else
     {
       //cout << "Track angles are known. We can use either errors from templates or the error parameterization from DB." << endl;
       
       if ( UseErrorsFromTemplates_ )
     {
       if (qBin_ == 0 && inflate_errors )
         {          
           int n_bigx = 0;
           int n_bigy = 0;
           
           int row_offset = cluster.minPixelRow();
           int col_offset = cluster.minPixelCol();
           
           for (int irow = 0; irow < 7; ++irow)
         {
           if ( theTopol->isItBigPixelInX( irow+row_offset ) )
             ++n_bigx;
         }
           
           for (int icol = 0; icol < 21; ++icol) 
         {
           if ( theTopol->isItBigPixelInY( icol+col_offset ) )
             ++n_bigy;
         }
           
           xerr = (float)(sizex + n_bigx) * thePitchX / sqrt( 12.0 );
           yerr = (float)(sizey + n_bigy) * thePitchY / sqrt( 12.0 );
           
         } // if ( qbin == 0 && inflate_errors )
       else
         {
           // Default errors
 
           if ( !edgex )
         {
           if ( sizex == 1 )
             {
               if ( !bigInX ) 
                         xerr = sx1; 
               else           
                         xerr = sx2;
             }
           else if ( sizex > 1 )
             xerr = sigmax;
           else
             throw cms::Exception("PixelCPEGeneric::localError") 
               << "\nERROR: Unphysical cluster x-size = " << sizex << "\n\n";
         }
           
           if ( !edgey )
         {
           if ( sizey == 1 )
             {
               if ( !bigInY )
             yerr = sy1;
               else
             yerr = sy2;
             }
           else if ( sizey > 1 )
             yerr = sigmay;
           else
             throw cms::Exception("PixelCPEGeneric::localError") 
               << "\nERROR: Unphysical cluster y-size = " << sizex << "\n\n";
         }
         } // if ( qbin == 0 && inflate_errors ) else
 
     } //if ( UseErrorsFromTemplates_ )
       else 
     {
       //cout << endl << "Use errors from DB:" << endl;
       
       if ( edgex && edgey ) 
         {    
           //--- Both axes on the edge, no point in calling PixelErrorParameterization,   
           //--- just return the max errors on both.      
         } 
       else 
         {    
           pair<float,float> errPair =    
         genErrorsFromDB_->getError( genErrorParm_, thePart, cluster.sizeX(), cluster.sizeY(),    
                         alpha_, beta_, bigInX, bigInY ); 
           if ( !edgex ) 
         xerr = errPair.first;    
           if ( !edgey ) 
         yerr = errPair.second;   
         }    
       
       if (theVerboseLevel > 9) 
         {    
           LogDebug("PixelCPEGeneric") <<     
         " Sizex = " << cluster.sizeX() << " Sizey = " << cluster.sizeY() <<      
         " Edgex = " << edgex           << " Edgey = " << edgey           <<      
         " ErrX  = " << xerr            << " ErrY  = " << yerr;   
         }
       
     } //if ( UseErrorsFromTemplates_ ) else 
       
     } // if ( !with_track_angle ) else
   
   if ( !(xerr > 0.0) )
     throw cms::Exception("PixelCPEGeneric::localError") 
       << "\nERROR: Negative pixel error xerr = " << xerr << "\n\n";
   
   if ( !(yerr > 0.0) )
     throw cms::Exception("PixelCPEGeneric::localError") 
       << "\nERROR: Negative pixel error yerr = " << yerr << "\n\n";
  
   xerr_sq = xerr*xerr; 
   yerr_sq = yerr*yerr;
  
   return LocalError( xerr_sq, 0, yerr_sq );
 
 }

LocalPoint PixelCPEGeneric::localPosition	(	const SiPixelCluster &	cluster,
		const GeomDetUnit &	det
	)		const

virtual

Hit position in the local frame (in cm). Unlike other CPE's, this one converts everything from the measurement frame (in channel numbers) into the local frame (in centimeters).

< Initialize this det unit

< correctly compute lorentz shifts in X and Y

< Q of the first pixel in X

< Q of the last pixel in X

< Q of the middle pixels in X

< Q of the first pixel in Y

< Q of the last pixel in Y

< Q of the middle pixels in Y

Reimplemented from PixelCPEBase.

Definition at line 120 of file PixelCPEGeneric.cc.

References SiPixelCluster::charge(), collect_edge_charges(), PixelCPEBase::computeLorentzShifts(), PixelCPEBase::cotalpha_, PixelCPEBase::cotbeta_, gather_cfg::cout, deltax, deltay, dx1, dx2, dy1, dy2, edm::hlt::Exception, generic_position_formula(), GeomDet::geographicalId(), SiPixelTemplateDBObject::getTemplateID(), MagneticField::inTesla(), IrradiationBiasCorrection_, PixelTopology::isItBigPixelInX(), PixelTopology::isItBigPixelInY(), PixelCPEBase::loc_trk_pred_, Topology::localPosition(), PixelCPEBase::lorentzShiftInCmX_, PixelCPEBase::lorentzShiftInCmY_, PixelCPEBase::magfield_, SiPixelCluster::maxPixelCol(), SiPixelCluster::maxPixelRow(), micronsToCm, SiPixelCluster::minPixelCol(), SiPixelCluster::minPixelRow(), pixmx, GloballyPositioned< T >::position(), SiPixelTemplate::qbin(), PixelCPEBase::qBin_, DetId::rawId(), GloballyPositioned< T >::rotation(), PixelCPEBase::setTheDet(), sigmax, sigmay, SiPixelCluster::sizeX(), SiPixelCluster::sizeY(), GeomDet::surface(), sx1, sx2, sy1, sy2, templ_, PixelCPEBase::templateDBobject_, templID_, the_eff_charge_cut_highX, the_eff_charge_cut_highY, the_eff_charge_cut_lowX, the_eff_charge_cut_lowY, the_size_cutX, the_size_cutY, PixelCPEBase::theDet, PixelCPEBase::thePitchX, PixelCPEBase::thePitchY, PixelCPEBase::theTopol, PixelCPEBase::theVerboseLevel, UseErrorsFromTemplates_, PixelCPEBase::with_track_angle, PV3DBase< T, PVType, FrameType >::x(), SiPixelCluster::x(), xPos, PV3DBase< T, PVType, FrameType >::y(), SiPixelCluster::y(), yPos, and PV3DBase< T, PVType, FrameType >::z().

Referenced by measurementPosition().

 {
   setTheDet( det, cluster );  
   computeLorentzShifts();  
   templID_ = templateDBobject_->getTemplateID(theDet->geographicalId().rawId());
   if ( UseErrorsFromTemplates_ )
     {
       /*bool fpix;  //!< barrel(false) or forward(true)
       if ( thePart == GeomDetEnumerators::PixelBarrel )
     fpix = false;    // no, it's not forward -- it's barrel
       else
     fpix = true;     // yes, it's forward
       */
       float qclus = cluster.charge();
       
       GlobalVector bfield = magfield_->inTesla( theDet->surface().position() ); 
       
       Frame detFrame( theDet->surface().position(), theDet->surface().rotation() );
       LocalVector Bfield = detFrame.toLocal( bfield );
       float locBz = Bfield.z();
       //cout << "PixelCPEGeneric::localPosition(...) : locBz = " << locBz << endl;
       
       pixmx  = -999.9; // max pixel charge for truncation of 2-D cluster
       sigmay = -999.9; // CPE Generic y-error for multi-pixel cluster
       deltay = -999.9; // CPE Generic y-bias for multi-pixel cluster
       sigmax = -999.9; // CPE Generic x-error for multi-pixel cluster
       deltax = -999.9; // CPE Generic x-bias for multi-pixel cluster
       sy1    = -999.9; // CPE Generic y-error for single single-pixel
       dy1    = -999.9; // CPE Generic y-bias for single single-pixel cluster
       sy2    = -999.9; // CPE Generic y-error for single double-pixel cluster
       dy2    = -999.9; // CPE Generic y-bias for single double-pixel cluster
       sx1    = -999.9; // CPE Generic x-error for single single-pixel cluster
       dx1    = -999.9; // CPE Generic x-bias for single single-pixel cluster
       sx2    = -999.9; // CPE Generic x-error for single double-pixel cluster
       dx2    = -999.9; // CPE Generic x-bias for single double-pixel cluster
       
       qBin_ = templ_.qbin( templID_, cotalpha_, cotbeta_, locBz, qclus,  // inputs
                pixmx,                                       // returned by reference
                sigmay, deltay, sigmax, deltax,              // returned by reference
                sy1, dy1, sy2, dy2, sx1, dx1, sx2, dx2 );    // returned by reference
       
       // These numbers come in microns from the qbin(...) call. Transform them to cm.
       const float micronsToCm = 1.0e-4;
       
       deltax = deltax * micronsToCm;
       dx1 = dx1 * micronsToCm;
       dx2 = dx2 * micronsToCm;
       
       deltay = deltay * micronsToCm;
       dy1 = dy1 * micronsToCm;
       dy2 = dy2 * micronsToCm;
       
       sigmax = sigmax * micronsToCm;
       sx1 = sx1 * micronsToCm;
       sx2 = sx2 * micronsToCm;
       
       sigmay = sigmay * micronsToCm;
       sy1 = sy1 * micronsToCm;
       sy2 = sy2 * micronsToCm;
       
     } // if ( UseErrorsFromTemplates_ )
   
   
   float Q_f_X = 0.0;        
   float Q_l_X = 0.0;        
   float Q_m_X = 0.0;        
   float Q_f_Y = 0.0;        
   float Q_l_Y = 0.0;        
   float Q_m_Y = 0.0;        
   collect_edge_charges( cluster, 
             Q_f_X, Q_l_X, Q_m_X, 
             Q_f_Y, Q_l_Y, Q_m_Y );
 
   //--- Find the inner widths along X and Y in one shot.  We
   //--- compute the upper right corner of the inner pixels
   //--- (== lower left corner of upper right pixel) and
   //--- the lower left corner of the inner pixels
   //--- (== upper right corner of lower left pixel), and then
   //--- subtract these two points in the formula.
 
   //--- Upper Right corner of Lower Left pixel -- in measurement frame
   MeasurementPoint meas_URcorn_LLpix( cluster.minPixelRow()+1.0,
                       cluster.minPixelCol()+1.0 );
 
   //--- Lower Left corner of Upper Right pixel -- in measurement frame
   MeasurementPoint meas_LLcorn_URpix( cluster.maxPixelRow(),
                       cluster.maxPixelCol() );
 
   //--- These two now converted into the local
   
   LocalPoint local_URcorn_LLpix;
   LocalPoint local_LLcorn_URpix;
 
 
   // PixelCPEGeneric can be used with or without track angles
   // If PixelCPEGeneric is called with track angles, use them to correct for bows/kinks:
   if ( with_track_angle )
     {
       local_URcorn_LLpix = theTopol->localPosition(meas_URcorn_LLpix, loc_trk_pred_);
       local_LLcorn_URpix = theTopol->localPosition(meas_LLcorn_URpix, loc_trk_pred_);
     }
   else
     {
       local_URcorn_LLpix = theTopol->localPosition(meas_URcorn_LLpix);
       local_LLcorn_URpix = theTopol->localPosition(meas_LLcorn_URpix);
     }
 
   if (theVerboseLevel > 20) {
     cout  
       << "\n\t >>> cluster.x = " << cluster.x()
       << "\n\t >>> cluster.y = " << cluster.y()
       << "\n\t >>> cluster: minRow = " << cluster.minPixelRow()
       << "  minCol = " << cluster.minPixelCol()
       << "\n\t >>> cluster: maxRow = " << cluster.maxPixelRow()
       << "  maxCol = " << cluster.maxPixelCol()
       << "\n\t >>> meas: inner lower left  = " << meas_URcorn_LLpix.x() 
       << "," << meas_URcorn_LLpix.y()
       << "\n\t >>> meas: inner upper right = " << meas_LLcorn_URpix.x() 
       << "," << meas_LLcorn_URpix.y() 
       << endl;
   }
 
   //--- &&& Note that the cuts below should not be hardcoded (like in Orca and
   //--- &&& CPEFromDetPosition/PixelCPEInitial), but rather be
   //--- &&& externally settable (but tracked) parameters.  
 
 
   //--- Position, including the half lorentz shift
   if (theVerboseLevel > 20) 
     cout << "\t >>> Generic:: processing X" << endl;
   float xPos = 
     generic_position_formula( cluster.sizeX(),
                   Q_f_X, Q_l_X, 
                   local_URcorn_LLpix.x(), local_LLcorn_URpix.x(),
                   0.5*lorentzShiftInCmX_,   // 0.5 * lorentz shift in 
                   cotalpha_,
                   thePitchX,
                   theTopol->isItBigPixelInX( cluster.minPixelRow() ),
                   theTopol->isItBigPixelInX( cluster.maxPixelRow() ),
                   the_eff_charge_cut_lowX,
                               the_eff_charge_cut_highX,
                               the_size_cutX);           // cut for eff charge width &&&
 
 
   if (theVerboseLevel > 20) 
     cout << "\t >>> Generic:: processing Y" << endl;
   float yPos = 
     generic_position_formula( cluster.sizeY(),
                   Q_f_Y, Q_l_Y, 
                   local_URcorn_LLpix.y(), local_LLcorn_URpix.y(),
                   0.5*lorentzShiftInCmY_,   // 0.5 * lorentz shift in cm
                   cotbeta_,
                   thePitchY,   // 0.5 * lorentz shift (may be 0)
                   theTopol->isItBigPixelInY( cluster.minPixelCol() ),
                   theTopol->isItBigPixelInY( cluster.maxPixelCol() ),
                   the_eff_charge_cut_lowY,
                               the_eff_charge_cut_highY,
                               the_size_cutY);           // cut for eff charge width &&&
                  
   // Apply irradiation corrections.
   if ( IrradiationBiasCorrection_ )
     {
       if ( cluster.sizeX() == 1 )
     {
       // sanity chack
       if ( cluster.maxPixelRow() != cluster.minPixelRow() )
         throw cms::Exception("PixelCPEGeneric::localPosition") 
           << "\nERROR: cluster.maxPixelRow() != cluster.minPixelRow() although x-size = 1 !!!!! " << "\n\n";
       
       // Find if pixel is double (big). 
       bool bigInX = theTopol->isItBigPixelInX( cluster.maxPixelRow() );
       
       if ( !bigInX ) 
         {
           //cout << "Apply correction dx1 = " << dx1 << " to xPos = " << xPos << endl;
           xPos -= dx1;
         }
       else           
         {
           //cout << "Apply correction dx2 = " << dx2 << " to xPos = " << xPos << endl;
           xPos -= dx2;
         }
     }
       else if ( cluster.sizeX() > 1 )
     {
       //cout << "Apply correction correction_deltax = " << deltax << " to xPos = " << xPos << endl;
       xPos -= deltax;
     }
       else
     throw cms::Exception("PixelCPEGeneric::localPosition") 
       << "\nERROR: Unphysical cluster x-size = " <<  (int)cluster.sizeX() << "\n\n";
       
   if ( cluster.sizeY() == 1 )
     {
       // sanity chack
       if ( cluster.maxPixelCol() != cluster.minPixelCol() )
     throw cms::Exception("PixelCPEGeneric::localPosition") 
       << "\nERROR: cluster.maxPixelCol() != cluster.minPixelCol() although y-size = 1 !!!!! " << "\n\n";
       
       // Find if pixel is double (big). 
       bool bigInY = theTopol->isItBigPixelInY( cluster.maxPixelCol() );
       
       if ( !bigInY ) 
     {
       //cout << "Apply correction dy1 = " << dy1 << " to yPos = " << yPos  << endl;
       yPos -= dy1;
     }
       else           
     {
       //cout << "Apply correction dy2 = " << dy2  << " to yPos = " << yPos << endl;
       yPos -= dy2;
     }
     }
   else if ( cluster.sizeY() > 1 )
     {
       //cout << "Apply correction deltay = " << deltay << " to yPos = " << yPos << endl;
       yPos -= deltay;
     }
   else
     throw cms::Exception("PixelCPEGeneric::localPosition") 
       << "\nERROR: Unphysical cluster y-size = " << (int)cluster.sizeY() << "\n\n";
 
     } // if ( IrradiationBiasCorrection_ )
     
   //--- Now put the two together
   LocalPoint pos_in_local( xPos, yPos );
   return pos_in_local;
 }

MeasurementPoint PixelCPEGeneric::measurementPosition	(	const SiPixelCluster &	cluster,
		const GeomDetUnit &	det
	)		const

Definition at line 99 of file PixelCPEGeneric.cc.

References LocalTrajectoryParameters::dxdz(), LocalTrajectoryParameters::dydz(), PixelCPEBase::loc_traj_param_, localPosition(), Topology::measurementPosition(), PixelCPEBase::theTopol, and PixelCPEBase::with_track_angle.

 {
   LocalPoint lp = localPosition(cluster,det);
 
   // ggiurgiu@jhu.edu 12/09/2010 : trk angles needed for bow/kink correction
   if ( with_track_angle ) 
     return theTopol->measurementPosition(lp, Topology::LocalTrackAngles( loc_traj_param_.dxdz(), loc_traj_param_.dydz() ) );
   else
     return theTopol->measurementPosition(lp);
 
 }