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1276 | //:>------------------------------------------------------------------
//: FILE: FtfTrack.cxx
//: HISTORY:
//: 28oct1996 version 1.00
//: 11aug1999 ppy primary flag fill in filling routines
//: 22aug1999 ppy fixing Debug routines (TRDEBUG flag on)
//: 23aug1999 ppy change loop order in seekNextHit
//: 29aug1999 ppy move fill tracks from follow to build
//: 19nov1999 ppy add maxChi2Primary to decide whether track is primary
//: 27jan2000 ppy refHit replaced by xRefHit and yRefHit
//: 27jan2000 VOLUME, ROW and AREA classes replaced by FtfContainer
//: 17feb2000 ddXy and ddSz trying to catch divisions by zero
//: 10Aug2001 Adding bFieldPolarity to handle negative bField
//: 4sep2001 Add way to followHitSelection to correct but
//: when extrapolating outwards
//:
//:<------------------------------------------------------------------
//:>------------------------------------------------------------------
//: CLASS: FtfTrack
//: DESCRIPTION: Functions associated with this class
//: AUTHOR: ppy - Pablo Yepes, yepes@physics.rice.edu
//:>------------------------------------------------------------------
//#include <memory.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "FtfTrack.h"
#include "FtfHit.h"
//extern FtfFinder tracker ;
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Add hits to track
// Arguments:
// thisHit: hit pointer
// way : >0 add at beginning, <0 at end
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void FtfTrack::add ( FtfHit *thisHit, int way )
{
//
// Increment # hits in this track
//
nHits++ ;
//
// Update pointers
//
if ( way < 0 || nHits == 1 ) {
if ( nHits > 1 ) ((FtfBaseHit *)lastHit)->nextTrackHit = thisHit ;
lastHit = thisHit ;
innerMostRow = ((FtfBaseHit *)lastHit)->row ;
xLastHit = ((FtfBaseHit *)lastHit)->x ;
yLastHit = ((FtfBaseHit *)lastHit)->y ;
}
else {
((FtfBaseHit *)thisHit)->nextTrackHit = firstHit ;
firstHit = thisHit ;
outerMostRow = ((FtfBaseHit *)firstHit)->row ;
}
//
// Declare hit as used and fill chi2
//
thisHit->setStatus ( this ) ;
//
// Check whether a fit update is needed
//
if ( nHits < getPara()->minHitsForFit ) return ;
//
// Include hit in xy fit parameter calculation
//
s11Xy = s11Xy + thisHit->wxy ;
s12Xy = s12Xy + thisHit->wxy * thisHit->xp ;
s22Xy = s22Xy + thisHit->wxy * square(thisHit->xp) ;
g1Xy = g1Xy + thisHit->wxy * thisHit->yp ;
g2Xy = g2Xy + thisHit->wxy * thisHit->xp * thisHit->yp ;
if ( nHits > getPara()->minHitsForFit )
{
ddXy = s11Xy * s22Xy - square ( s12Xy ) ;
if ( ddXy != 0 ) {
a1Xy = ( g1Xy * s22Xy - g2Xy * s12Xy ) / ddXy ;
a2Xy = ( g2Xy * s11Xy - g1Xy * s12Xy ) / ddXy ;
}
else {
if ( getPara()->infoLevel > 0 ) {
LOG(ERR, "FtfTrack:add: ddXy = 0 \n" ) ;
}
}
}
//
// Now in the sz plane
//
if ( getPara()->szFitFlag ) {
s11Sz = s11Sz + thisHit->wz ;
s12Sz = s12Sz + thisHit->wz * thisHit->s ;
s22Sz = s22Sz + thisHit->wz * thisHit->s * thisHit->s ;
g1Sz = g1Sz + thisHit->wz * thisHit->z ;
g2Sz = g2Sz + thisHit->wz * thisHit->s * thisHit->z ;
if ( nHits > getPara()->minHitsForFit ) {
ddSz = s11Sz * s22Sz - s12Sz * s12Sz ;
if ( ddSz != 0 ) {
a1Sz = ( g1Sz * s22Sz - g2Sz * s12Sz ) / ddSz ;
a2Sz = ( g2Sz * s11Sz - g1Sz * s12Sz ) / ddSz ;
}
else
{
if ( getPara()->infoLevel > 0 ) {
LOG(ERR, "FtfTrack:add: ddSz = 0 \n" ) ;
}
}
}
}
}
//****************************************************************************
// Fill track information tables
//****************************************************************************
void FtfTrack::add ( FtfTrack *piece )
{
//
// Get circle parameters
//
s11Xy += piece->s11Xy ;
s12Xy += piece->s12Xy ;
s22Xy += piece->s22Xy ;
g1Xy += piece->g1Xy ;
g2Xy += piece->g2Xy ;
ddXy = s11Xy * s22Xy - square ( s12Xy ) ;
a1Xy = ( g1Xy * s22Xy - g2Xy * s12Xy ) / ddXy ;
a2Xy = ( g2Xy * s11Xy - g1Xy * s12Xy ) / ddXy ;
//
// Now in the sz plane
//
if ( getPara()->szFitFlag ) {
double det1 = s11Sz * s22Sz - s12Sz * s12Sz ;
dtanl = (double) ( s11Sz / det1 );
dz0 = (double) ( s22Sz / det1 );
double det2 = piece->s11Sz * piece->s22Sz - piece->s12Sz * piece->s12Sz ;
piece->dtanl = (double) ( piece->s11Sz / det2 );
piece->dz0 = (double) ( piece->s22Sz / det2 );
double weight1 = 1./(dtanl*dtanl);
double weight2 = 1./(piece->dtanl*piece->dtanl);
double weight = (weight1+weight2);
tanl = ( weight1 * tanl + weight2 * piece->tanl ) / weight ;
weight1 = 1./(dz0*dz0);
weight2 = 1./(piece->dz0*piece->dz0);
weight = (weight1+weight2);
z0 = ( weight1 * z0 + weight2 * piece->z0 ) / weight ;
}
//
// Add space points to first track
//
int counter ;
if ( piece->outerMostRow < outerMostRow ){
if ( lastHit != NULL ) {
counter = 0 ;
for ( currentHit = piece->firstHit ;
currentHit != 0 && counter < piece->nHits ;
currentHit = ((FtfBaseHit *)currentHit)->nextTrackHit ) {
((FtfBaseHit *)currentHit)->track = this ;
counter++ ;
}
((FtfBaseHit *)lastHit)->nextTrackHit = piece->firstHit ;
lastHit = piece->lastHit ;
}
piece->firstHit = 0 ;
innerMostRow = piece->innerMostRow ;
xLastHit = piece->xLastHit ;
yLastHit = piece->yLastHit ;
}
else {
if ( piece->lastHit != NULL ) {
counter = 0 ;
for ( currentHit = (FtfHit *)piece->firstHit ;
currentHit != 0 && counter < piece->nHits ;
currentHit = ((FtfBaseHit *)currentHit)->nextTrackHit ) {
((FtfBaseHit *)currentHit)->track = this ;
counter++;
}
((FtfBaseHit *)piece->lastHit)->nextTrackHit = firstHit ;
firstHit = piece->firstHit ;
}
outerMostRow = piece->outerMostRow ;
piece->firstHit = 0 ;
}
//
//
nHits += piece->nHits ;
chi2[0] += piece->chi2[0] ;
chi2[1] += piece->chi2[1] ;
//
// Update track parameters
//
//
getPara()->szFitFlag = 0 ;
if ( getPara()->fillTracks ) fill ( ) ;
getPara()->szFitFlag = 1 ;
//
//
// Declare track 2 not to be used
//
piece->flag = -1 ;
}
//****************************************************************************
// Control how the track gets built
//****************************************************************************
int FtfTrack::buildTrack ( FtfHit *frstHit, FtfContainer *volume ) {
//
// Add first hit to track
//
add ( frstHit, GO_DOWN ) ;
//
// Try to build a segment first
//
if ( !segment ( volume, GO_DOWN ) ) return 0 ;
//
// If segment build go for a real track with a fit
//
int rowToStop = getPara()->rowInnerMost ;
if ( !follow ( volume, GO_DOWN, rowToStop ) ) return 0 ;
//
// Now to extent track the other direction if requested
//
if ( getPara()->goBackwards ) {
follow ( volume, GO_UP, getPara()->rowOuterMost ) ;
}
//
// Fill tracks
//
if ( getPara()->fillTracks )
fill ( ) ;
#ifdef TRDEBUG
debugFill ( ) ;
#endif
return 1 ;
}
//***************************************************************************
// Calculates dEdx
//***************************************************************************
void FtfTrack::dEdx ( ){
int i, j ;
FtfHit *nextHit ;
int nTruncate = max(1,
getPara()->dEdxNTruncate*nHits/100) ;
nTruncate = min(nHits/2,nTruncate) ;
//
// Define array to keep largest de's
//
double *de = new double[nTruncate] ;
//
// Reset
//
dedx = 0.F ;
memset ( de, 0, nTruncate*sizeof(double) ) ;
//
//
//
for ( nextHit = (FtfHit *)firstHit ;
nextHit != 0 ;
nextHit = (FtfHit *)nextHit->nextTrackHit) {
dedx += nextHit->q ;
if ( nextHit->q < de[0] ) continue ;
for ( i = nTruncate-1 ; i>=0 ; i-- ){
if ( nextHit->q > de[i] ){
for ( j=0 ; j<i ; j++ ) de[j] = de[j+1] ;
de[i] = nextHit->q ;
break ;
}
}
}
//
// Subtract largest de
//
for ( i=0 ; i<nTruncate ; i++ ) dedx -= de[i] ;
dedx = dedx / length ;
/* End track in required volume condition */
}<--- Memory leak: de
//***********************************************************************
// Delete track candidate
//***********************************************************************
void FtfTrack::deleteCandidate(void)
{
FtfHit *curentHit = (FtfHit *)firstHit ;
FtfHit *nextHit ;
#ifdef TRDEBUG
debugDeleteCandidate ( ) ;
#endif
while ( curentHit != 0 )
{
nextHit = (FtfHit *)curentHit->nextTrackHit;
curentHit->nextTrackHit = 0 ;
curentHit->xyChi2 =
curentHit->szChi2 =
curentHit->s = 0.F ;
curentHit->setStatus ( 0 ) ;
curentHit = nextHit;
}
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Fills track variables with or without fit
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void FtfTrack::fill ( ) {
//
// Get circle parameters
//
double xc, yc ;
double rc = sqrt ( a2Xy * a2Xy + 1 ) / ( 2 * fabs(a1Xy) ) ;
pt = (double)fabs(bFactor * getPara()->bField * rc );
double xParameters = 0.;
double yParameters = 0.;
//
if ( pt > getPara()->ptMinHelixFit ) {
double combinedChi2 = 0.5*(chi2[0]+chi2[1])/nHits ;
if ( getPara()->primaries && combinedChi2 < getPara()->maxChi2Primary )
getPara()->vertexConstrainedFit = 1 ;
else
getPara()->vertexConstrainedFit = 0 ;
fitHelix ( ) ;
// if ( id == 303) Print(31);
if ( getPara()->vertexConstrainedFit && getPara()->parameterLocation ){
updateToRadius ( sqrt(xLastHit*xLastHit+yLastHit*yLastHit) ) ;
}
else if ( !getPara()->vertexConstrainedFit && !getPara()->parameterLocation ) {
updateToClosestApproach ( getPara()->xVertex, getPara()->yVertex, 2000. ) ;
}
// if ( id == 1 ) Print(30);
}
else{
if ( getPara()->primaries ){
//cout << "." << flush;
fillPrimary ( xc, yc, rc, getPara()->xVertex, getPara()->yVertex ) ;
if ( getPara()->parameterLocation ) {// give track parameters at inner most point
updateToRadius ( sqrt(xLastHit*xLastHit+yLastHit*yLastHit) ) ;
}
}
else { // Secondaries now
xc = - a2Xy / ( 2. * a1Xy ) + xRefHit ;
yc = - 1. / ( 2. * a1Xy ) + yRefHit ;
if ( getPara()->parameterLocation ) { // give track parameters at inner most point
xParameters = xLastHit ;
yParameters = yLastHit ;
}
else { // give parameters at point of closest approach
getClosest ( getPara()->xVertex, getPara()->yVertex,
rc, xc, yc, xParameters, yParameters ) ;
}
fillSecondary ( xc, yc, xParameters, yParameters ) ;
}
//
// Get Errors
//
if ( getPara()->getErrors ) {
getErrorsCircleFit ( (double)xc, (double)yc, (double)rc ) ;
double det = s11Sz * s22Sz - s12Sz * s12Sz ;
dtanl = (double) ( s11Sz / det );
dz0 = (double) ( s22Sz / det );
}
}
}
//****************************************************************************
// Fill track information variables
//****************************************************************************
void FtfTrack::fillPrimary ( double &xc, double &yc, double &rc,
double xPar, double yPar ) {
//
// Get circle parameters
//
xc = getPara()->xVertex - a2Xy / ( 2. * a1Xy ) ;
yc = getPara()->yVertex - 1. / ( 2. * a1Xy ) ;
//
// Get track parameters
//
double angle_vertex = atan2 ( yPar-yc, xPar-xc ) ;
if ( angle_vertex < 0. ) angle_vertex = angle_vertex + twoPi ;
double dx_last = xLastHit - xc ;
double dy_last = yLastHit - yc ;
double angle_last = atan2 ( dy_last, dx_last ) ;
if ( angle_last < 0. ) angle_last = angle_last + twoPi ;
//
// Get the rotation
//
double d_angle = angle_last - angle_vertex ;
// if ( d_angle > pi ) d_angle -= twoPi ;
if ( d_angle < -pi ) d_angle += twoPi ;
q = getPara()->bFieldPolarity * ( ( d_angle < 0 ) ? 1 : -1 ) ;
r0 = sqrt(xPar*xPar+yPar*yPar) ;
phi0 = atan2(yPar,xPar) ;
if ( phi0 < 0 ) phi0 += 2. * M_PI ;
psi = (double)(angle_vertex - getPara()->bFieldPolarity*q * 0.5F * pi) ;
if ( psi < 0 ) psi = (double)(psi + twoPi );
if ( psi > twoPi ) psi = (double)(psi - twoPi );
//
// Get z parameters if needed
//
if ( getPara()->szFitFlag == 1 ){
tanl = -(double)a2Sz ;
z0 = (double)(a1Sz + a2Sz * ( length - rc * d_angle * getPara()->bFieldPolarity*q ) );
}
else if ( getPara()->szFitFlag == 2 ) {
tanl = ((FtfBaseHit *)firstHit)->z /
(double)sqrt ( ((FtfBaseHit *)firstHit)->x*((FtfBaseHit *)firstHit)->x +
((FtfBaseHit *)firstHit)->y*((FtfBaseHit *)firstHit)->y ) ;
z0 = 0.F ;
}
//
// Store some more track info
//
eta = seta(1.,tanl ) ;
//
// Set primary track
//
flag = 1 ;
}
//****************************************************************************
//
// Fill track information tables
//
//****************************************************************************
void FtfTrack::fillSecondary ( double &xc, double &yc,
double xPar, double yPar )
{
/*--------------------------------------------------------------------------
Get angles for initial and final points
------------------------------------------------------------------------------*/
double dx1 = ((FtfBaseHit *)firstHit)->x - xc ;
double dy1 = ((FtfBaseHit *)firstHit)->y - yc ;
double angle1 = atan2 ( dy1, dx1 ) ;
if ( angle1 < 0. ) angle1 = angle1 + twoPi ;
double dx2 = xLastHit - xc ;
double dy2 = yLastHit - yc ;
double angle2 = atan2 ( dy2, dx2 ) ;
if ( angle2 < 0. ) angle2 = angle2 + twoPi ;
/*--------------------------------------------------------------------------
Get the rotation
------------------------------------------------------------------------------*/
double dangle = angle2 - angle1 ;
// if ( dangle > pi ) dangle = dangle - twoPi ;
if ( dangle < -pi ) dangle = dangle + twoPi ;
q = getPara()->bFieldPolarity * ( ( dangle > 0 ) ? 1 : -1 ) ;
r0 = ((FtfHit *)lastHit)->r ;
phi0 = ((FtfHit *)lastHit)->phi ;
psi = (double)(angle2 - getPara()->bFieldPolarity * q * piHalf );
if ( psi < 0 ) psi = (double)(psi + twoPi );
//
// Get z parameters if needed
//
if ( getPara()->szFitFlag ){
tanl = -(double)a2Sz ;
z0 = (double)(a1Sz + a2Sz * length );
}
else{
tanl = ((FtfBaseHit *)firstHit)->z /
(double)sqrt ( ((FtfBaseHit *)firstHit)->x*((FtfBaseHit *)firstHit)->x +
((FtfBaseHit *)firstHit)->y*((FtfBaseHit *)firstHit)->y ) ;
z0 = 0.F ;
}
//
//--> Store some more track info
//
eta = seta(1., tanl ) ;
//
// Set primary track flag
//
flag = 0 ;
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Adds hits to a track chosing the closest to fit
// Arguments:
// volume: volume pointer
// way : which way to procede in r (negative or positive)
// row_to_stop: row index where to stop
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
int FtfTrack::follow ( FtfContainer *volume, int way, int ir_stop ) {
FtfHit *nextHit ;
if ( way < 0 )
nextHit = (FtfHit *)lastHit ;
else
nextHit = (FtfHit *)firstHit ;
#ifdef TRDEBUG
if ( getPara()->trackDebug && getPara()->debugLevel >= 2 )
LOG(ERR, "FtfTrack::follow: ===> Going into Track extension <===\n" );
#endif
//
// Define variables to keep total chi2
//
double xyChi2 = chi2[0] ;
double szChi2 = chi2[1] ;
//
// Loop as long a a hit is found and the segment
// is shorter than n_hit_segm
//
while ( way * nextHit->row < way * ir_stop ) {
//
// Select next hit
//
chi2[0] = getPara()->hitChi2Cut ;
nextHit = seekNextHit ( volume, nextHit, way*getPara()->trackRowSearchRange, USE_FOLLOW ) ;
#ifdef TRDEBUG
if ( getPara()->trackDebug && getPara()->debugLevel >= 1 ){
if ( nextHit != 0 ){
LOG(ERR, "FtfTrack::follow: Search succesful, hit selected %d\n",
nextHit->id );
// nextHit->Show ( getPara()->color_track ) ;
}
else{
LOG(ERR, "FtfTrack::follow: Search unsuccesful\n" );
if ( chi2[0]+chi2[1] > getPara()->hitChi2Cut )
LOG(ERR, " hit chi2 %f larger than cut %f ", chi2[0]+chi2[1],
getPara()->hitChi2Cut ) ;
}
debugAsk () ;
}
#endif
//
// Stop if nothing found
//
if ( nextHit == 0 ) break ;
//
// Keep total chi2
//
double lxyChi2 = chi2[0]-chi2[1] ;
xyChi2 += lxyChi2 ;
nextHit->xyChi2 = lxyChi2 ;
//
// if sz fit update track length
//
if ( getPara()->szFitFlag ) {
length = nextHit->s ;
szChi2 += chi2[1] ;
nextHit->szChi2 = chi2[1] ;
}
//
// Add hit to track
//
add ( nextHit, way ) ;
} // End while
//
// Check # hits
//
if ( nHits < getPara()->minHitsPerTrack ) return 0 ;
//
// Store track chi2
//
chi2[0] = xyChi2 ;
chi2[1] = szChi2 ;
//
// Check total chi2
//
double normalized_chi2 = (chi2[0]+chi2[1])/nHits ;
if ( normalized_chi2 > getPara()->trackChi2Cut ) return 0 ;
//
return 1 ;
}
/*******************************************************************************
Reconstructs tracks
*********************************************************************************/
int FtfTrack::followHitSelection ( FtfHit *baseHit, FtfHit *candidateHit, int way ){
//
double lszChi2 = 0 ;
double lchi2 ;
double slocal=0, deta, dphi ;
double dx, dy, dxy, dsz, temp ;
//
// Check delta eta
//
// if ( baseHit->dz < 1000. && candidateHit->dz < 1000 ){
deta = fabs((baseHit->eta)-(candidateHit->eta)) ;
if ( deta > getPara()->deta ) return 0 ;
// }
// else deta = 0.F ;
//
// Check delta phi
//
dphi = fabs((baseHit->phi)-(candidateHit->phi)) ;
if ( dphi > getPara()->dphi && dphi < twoPi-getPara()->dphi ) return 0 ;
//
// If looking for secondaries calculate conformal coordinates
//
if ( getPara()->primaries == 0 ){
double xx = candidateHit->x - xRefHit ;
double yy = candidateHit->y - yRefHit ;
double rr = xx * xx + yy * yy ;
candidateHit->xp = xx / rr ;
candidateHit->yp = - yy / rr ;
candidateHit->wxy = rr * rr /
( square(getPara()->xyErrorScale) *
( square(candidateHit->dx) + square(candidateHit->dy) ) ) ;
}
//
// Calculate distance in x and y
//
temp = (a2Xy * candidateHit->xp - candidateHit->yp + a1Xy) ;
dxy = temp * temp / ( a2Xy * a2Xy + 1.F ) ;
//
// Calculate chi2
//
lchi2 = (dxy * candidateHit->wxy) ;
if ( lchi2 > chi2[0] ) return 0 ;
//
// Now in the sz plane
//
if ( getPara()->szFitFlag ){
//
// Get "s" and calculate distance hit-line
//
dx = baseHit->x - candidateHit->x ;
dy = baseHit->y - candidateHit->y ;
slocal = baseHit->s - way * sqrt ( dx * dx + dy * dy ) ;
temp = (a2Sz * slocal - candidateHit->z + a1Sz) ;
dsz = temp * temp / ( a2Sz * a2Sz + 1 ) ;
//
// Calculate chi2
//
lszChi2 = dsz * candidateHit->wz ;
lchi2 += lszChi2 ;
}
else {
lszChi2 = 0.F ;
//slocal = 0;
}
//
// Check whether the chi2 square is better than previous one
//
if ( lchi2 < chi2[0] ) {
chi2[0] = (double)lchi2 ;
chi2[1] = (double)lszChi2 ;
if ( getPara()->szFitFlag ) candidateHit->s = (double)slocal ;
//
// if a good chi2 is found let's stop here
//
if ( lchi2 < getPara()->goodHitChi2 ) return 2 ;
return 1 ;
}
//
// Return the selected hit
//
return 0 ;
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Merges tracks
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
int FtfTrack::mergePrimary ( FtfContainer *trackArea ){
short track_merged ;
register int areaIndex ;
int i_phi, i_eta ;
FtfTrack *i_track = 0 ;
int ip, ie ;
double delta_psi ;
//
// Check Track is primary
//
if ( flag != 1 ) return 0 ;
//-
// Get track area
//
i_phi = (int)(( psi - getPara()->phiMinTrack ) / getPara()->phiSliceTrack + 1 );
if ( i_phi < 0 ) {
LOG(ERR, " Track phi index too low %d \n", i_phi ) ;
i_phi = 1 ;
}
if ( i_phi >= getPara()->nPhiTrackPlusOne ) {
LOG(ERR, " Track phi index too high %d \n", i_phi ) ;
i_phi = getPara()->nPhiTrack ;
}
//
// Now eta
//
i_eta = (int)(( eta - getPara()->etaMinTrack ) / getPara()->etaSliceTrack + 1 );
if ( i_eta <= 0 ) {
LOG(ERR, " Track eta index too low %d \n", i_eta ) ;
i_eta = 1 ;
}
if ( i_eta >= getPara()->nEtaTrackPlusOne ) {
LOG(ERR, " Track eta index too high %d \n", i_eta ) ;
i_eta = getPara()->nEtaTrack ;
}
//
// Loop around selected area
//
track_merged = 0 ;
for ( ip = max(i_phi-1,1) ; ip < min(i_phi+2,getPara()->nPhiTrackPlusOne) ; ip++ ) {
for ( ie = max(i_eta-1,1) ; ie < min(i_eta+2,getPara()->nEtaTrackPlusOne) ; ie++ ) {
areaIndex = ip * getPara()->nEtaTrackPlusOne + ie ;
//
// Loop over tracks
//
for ( i_track = (FtfTrack *)trackArea[areaIndex].first ;
i_track != 0 ;
i_track = i_track->getNextTrack() ) {
//
// Reject track if it is not good
//
if ( i_track->flag < 0 ) continue ;
//
// Compare both tracks
//
// No overlapping tracks
short delta1 = i_track->outerMostRow - outerMostRow ;
short delta2 = i_track->innerMostRow - innerMostRow ;
if ( delta1 * delta2 <= 0 ) continue ;
//
// Tracks close enough
//
if ( fabs(eta-i_track->eta) > getPara()->detaMerge ) continue ;
delta_psi = (double)fabs(psi - i_track->psi) ;
if ( delta_psi > getPara()->dphiMerge && delta_psi < twoPi - getPara()->dphiMerge ) continue ;
i_track->add ( this ) ;
#ifdef TRDEBUG
if ( getPara()->debugLevel > 1 )
LOG(ERR, " \n Track %d merge into %d ", this->id, i_track->id ) ;
#endif
track_merged = 1 ;
break ;
}
}
}
//
//-> If track not matched add it
//
if ( track_merged == 0 ) {
areaIndex = i_phi * getPara()->nEtaTrackPlusOne + i_eta ;
if ( trackArea[areaIndex].first == 0 )
trackArea[areaIndex].first =
trackArea[areaIndex].last = (void *)this ;
else {
((FtfTrack *)trackArea[areaIndex].last)->nxatrk = this ;
trackArea[areaIndex].last = (void *)this ;
}
}
return track_merged ;
}
/*************************************************************************
Recontruct primary tracks
*************************************************************************/
void FtfTrack::reset (void)
{
/*----------------------------------------------------------------------
Set fit parameters to zero
----------------------------------------------------------------------*/
flag = getPara()->primaries ;
nHits = 0 ;
s11Xy =
s12Xy =
s22Xy =
g1Xy =
g2Xy =
chi2[0] = 0.F ;
nxatrk = 0 ;
if ( getPara()->szFitFlag )
{
s11Sz =
s12Sz =
s22Sz =
g1Sz =
g2Sz =
chi2[1] =
length = 0.F ;
}
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Function to look for next hit
// Input: volume: Volume pointer
// baseHit: Last point in track
// n_r_steps: How many rows search and which way (up or down)
// which_function: Function to be used to decide whether the hit is good
// Returns: Selected hit
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
FtfHit *FtfTrack::seekNextHit ( FtfContainer *volume,
FtfHit *baseHit,
int n_r_steps,
int which_function ) {
#define N_LOOP 9
int loop_eta[N_LOOP] = { 0, 0, 0,-1,-1,-1, 1, 1, 1 } ;
int loop_phi[N_LOOP] = { 0,-1, 1, 0,-1, 1, 0,-1, 1 };
int ir, irp, ipp, itp, k;
register int areaIndex ;
int result ;
//-------------------------------------------------------------------------------
// Calculate limits on the volume loop
//-----------------------------------------------------------------------------*/
int initialRow, way ;
if ( n_r_steps < 0 ) {
initialRow = max(1, (baseHit->row - getPara()->rowInnerMost)/getPara()->modRow);
n_r_steps = min(initialRow,-n_r_steps ) ;
way = -1 ;
}
else {
initialRow = max(1, (baseHit->row - getPara()->rowInnerMost + 2)/getPara()->modRow);
n_r_steps = min((getPara()->rowOuterMost-initialRow+1),n_r_steps) ;
way = 1 ;
}
FtfHit *selected_hit = 0 ;
//
// Loop over modules
//
for ( ir = 0 ; ir < n_r_steps ; ir++ ){
irp = initialRow + way * ir ;
for ( k=0; k< N_LOOP; k++){
ipp = baseHit->phiIndex + loop_phi[k];
//
//-- Gymnastics if phi is closed
//
if ( ipp < 1 ) {
if ( getPara()->phiClosed )
ipp = getPara()->nPhi + ipp ;
else
continue ;
}
else if ( ipp > getPara()->nPhi ) {
if ( getPara()->phiClosed )
ipp = ipp - getPara()->nPhi ;
else
continue ;
}
//
// Now get eta index
//
itp = baseHit->etaIndex + loop_eta[k];
if ( itp < 1 ) continue ;
if ( itp > getPara()->nEta ) continue ;
//
#ifdef TRDEBUG
if ( getPara()->trackDebug && getPara()->debugLevel >= 4 )
LOG(ERR, "FtfTrack::seekNextHit: search in row %d \n",irp ) ;
#endif
//
// Now loop over hits in each volume
//
areaIndex = irp * getPara()->nPhiEtaPlusOne + ipp * getPara()->nEtaPlusOne + itp ;
for ( FtfHit *candidateHit = (FtfHit *)volume[areaIndex].first ;
candidateHit != 0 ;
candidateHit = (FtfHit *)candidateHit->nextVolumeHit ){
#ifdef TRDEBUG
debugInVolume ( baseHit, candidateHit ) ;
#endif
//----------------------------------------------------------------------------
// Check whether the hit was used before
//--------------------------------------------------------------------------*/
if ( candidateHit->track != 0 ) continue ;
//--------------------------------------------------------------------------
// If first points, just choose the closest hit
//-------------------------------------------------------------------------- */
if ( which_function == USE_SEGMENT )
result = segmentHitSelection ( baseHit, candidateHit ) ;
else
result = followHitSelection ( baseHit, candidateHit, way ) ;
//
// Check result
//
if ( result > 0 ) {
selected_hit = candidateHit ;
if ( result ==2 ) goto found ;
}
//
// End hit loop
//
}
//
// End row loop
//
}
//
// End volume loop inside cone
//
}
found: ;
return selected_hit ;
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Forms segments
// Arguments:
// volume : volume pointer
// way : whether to go to negative or positive ir
// row_to_stop: row index where to stop
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
int FtfTrack::segment( FtfContainer *volume, int way ){
//
// Define some variables
//
double dx, dy, rr ;
FtfHit* nextHit ;
//
// Check which way to go
//
if ( way < 0 )
nextHit = (FtfHit *)lastHit ;
else
nextHit = (FtfHit *)firstHit ;
#ifdef TRDEBUG
if ( getPara()->trackDebug && getPara()->debugLevel >= 4 )
LOG(ERR, "FtfTrack:segment: **** Trying to form segment ****\n" );
#endif
//
// Loop as long a a hit is found and the segment
// is shorter than n_hit_segm
//
while ( nextHit != 0 && nHits < getPara()->nHitsForSegment ) {
chi2[0] = getPara()->maxDistanceSegment ; ;
nextHit = seekNextHit ( volume, nextHit, way*getPara()->segmentRowSearchRange,
USE_SEGMENT ) ;
#ifdef TRDEBUG
if ( getPara()->trackDebug && getPara()->debugLevel > 0 ) {
if ( nextHit != 0 ) {
LOG(ERR, "FtfTrack::segment: Search succesful, hit %d selected\n",
nextHit->id );
// nextHit->Show ( getPara()->color_track ) ;
}
else
LOG(ERR, "FtfTrack::segment: Search unsuccesful\n" );
debugAsk () ;
}
#endif
//
// If sz fit update s
//
if ( nextHit != 0 ){
//
// Calculate track length if sz plane considered
//
if ( getPara()->szFitFlag ){
dx = ((FtfBaseHit *)nextHit)->x - ((FtfBaseHit *)lastHit)->x ;
dy = ((FtfBaseHit *)nextHit)->y - ((FtfBaseHit *)lastHit)->y ;
length += (double)sqrt ( dx * dx + dy * dy ) ;
nextHit->s = length ;
}
//
// Calculate conformal coordinates
//
if ( getPara()->primaries == 0 ){
rr = square ( xRefHit - nextHit->x ) +
square ( yRefHit - nextHit->y ) ;
nextHit->xp = ( nextHit->x - xRefHit ) / rr ;
nextHit->yp = - ( nextHit->y - yRefHit ) / rr ;
nextHit->wxy = rr * rr / ( square(getPara()->xyErrorScale) *
square(nextHit->dx) + square(nextHit->dy) ) ;
}
//
// Add hit to track
//
add ( nextHit, way ) ;
}
} // End while ( lastHit ...
//
// If number of hits is as expected return 1
//
if ( nHits == getPara()->nHitsForSegment )
return 1 ;
else
return 0 ;
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Routine to look for segments.
// Arguments:
// baseHit: Hit from which track is being extrapolated
// candidateHit: Hit being examined as a candidate to which extend track
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
int FtfTrack::segmentHitSelection ( FtfHit *baseHit, FtfHit *candidateHit ){
double dx, dy, dr, d3, dangle ;
double dphi, deta ;
double angle ;
//
// select hit with the
// the smallest value of d3 (defined below)
//
dphi = (double)fabs((baseHit->phi) - (candidateHit->phi)) ;
if ( dphi > pi ) dphi = (double)fabs( twoPi - dphi ) ;
if ( dphi > getPara()->dphi && dphi < twoPi -getPara()->dphi ) return 0 ;
//
// Make sure we want to look at the difference in eta
//
if ( baseHit->dz < 1000. && candidateHit->dz < 1000. ){
deta = (double)fabs((baseHit->eta) - (candidateHit->eta)) ;
if ( deta > getPara()->deta ) return 0 ;
}
else deta = 0.F ;
dr = (double)fabs((double)(baseHit->row - candidateHit->row));
d3 = (double)(toDeg * dr * ( dphi + deta ) ) ;
//
// If initial segment is longer than 2 store angle info in
// a1Xy and a1_sz
//
if ( getPara()->nHitsForSegment > 2 && nHits-1 < getPara()->nHitsForSegment ) {
dx = candidateHit->x - baseHit->x ;
dy = candidateHit->y - baseHit->y ;
angle = (double)atan2 ( dy, dx ) ;
if ( angle < 0 ) angle = angle + twoPi ;
lastXyAngle = angle ;
}
#ifdef TRDEBUG
if ( getPara()->trackDebug && getPara()->debugLevel >= 3 ) {
LOG(ERR, "FtfTrack::segmentHitSelection:\n");
LOG(ERR, "dr,dphi,deta,distance, Min distance %7.2f %7.2f %7.2f %7.2f %7.2f\n",
dr,dphi,deta,d3,chi2[0] ) ;
if ( d3 < chi2[0] )
LOG(ERR, "Best point, keep it !!!\n" );
else{
LOG(ERR, "Worse than previous, reject !!\n" );
// candidateHit->Show ( getPara()->color_transparent );
}
debugAsk() ;
}
#endif
if ( d3 < chi2[0] ) {
//
// For second hit onwards check the difference in angle
// between the last two track segments
//
if ( nHits > 1 ) {
dx = candidateHit->x - baseHit->x ;
dy = candidateHit->y - baseHit->y ;
angle = (double)atan2 ( dy, dx ) ;
if ( angle < 0 ) angle = angle + twoPi ;
dangle = (double)fabs ( lastXyAngle - angle );
lastXyAngle = angle ;
if ( dangle > getPara()->segmentMaxAngle ) return 0 ;
}
//
// Check whether this is the "closest" hit
//
chi2[0] = d3 ;
if ( d3 < getPara()->goodDistance ) return 2 ;
return 1 ;
}
//
// If hit does not fulfill criterai return 0
//
return 0 ;
}
#ifdef TRDEBUG
//*****************************************************************************
// Ask for a character to keep going
//******************************************************************************/
void FtfTrack::debugAsk (void)
{
char cc;
LOG(ERR, "stop(s), continue (any other key)\n" );
cc = getchar();
if ( cc == 's' ) getPara()->trackDebug = 0 ;
if ( cc == '1' ) getPara()->debugLevel = 1 ;
if ( cc == '2' ) getPara()->debugLevel = 2 ;
if ( cc == '3' ) getPara()->debugLevel = 3 ;
if ( cc == '4' ) getPara()->debugLevel = 4 ;
if ( cc == '5' ) getPara()->debugLevel = 5 ;
if ( cc == '6' ) getPara()->debugLevel = 6 ;
if ( cc == '7' ) getPara()->debugLevel = 7 ;
LOG(ERR, "FtfTrack::debugAsk: Debug Level %d\n", getPara()->debugLevel ) ;
}
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Debug Delete Candidate
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void FtfTrack::debugDeleteCandidate(void)
{
if ( getPara()->trackDebug == 0 || getPara()->debugLevel < 1 ) return ;
// for ( startLoop() ; done() ; nextHit() ) {
// currentHit->Show ( getPara()->color_back ) ;
// }
LOG(ERR, "FtfTrack::debugDeleteCandidate: Track %d has %d hits <==\n"
,id, nHits );
LOG(ERR, "FtfTrack::debugDeleteCandidate: Minimum is %d, delete it \n",
getPara()->minHitsPerTrack );
// print ( 31 ) ;
debugAsk () ;
}
/*****************************************************************************
Fill track information tables
******************************************************************************/
void FtfTrack::debugFill ( )
{
if ( getPara()->trackDebug && getPara()->debugLevel >= 1 ) {
LOG(ERR, "\n ===> Track %d added <=== ",id+1 );
Print ( 31 ) ;
}
}
/*****************************************************************************
Reconstructs tracks
******************************************************************************/
void FtfTrack::debugFollowCandidate ( FtfHit* candidateHit )
{
if ( !getPara()->trackDebug || getPara()->debugLevel >= 4 ) return ;
//
// Show the whole track and fit
//
//for ( startLoop() ; done() ; nextHit() ) {
// currentHit->Show ( getPara()->color_track ) ;
//}
// candidateHit->Show ( getPara()->color_candidate );
//
// Print relevant information
//
LOG(ERR, "FtfTrack::debugFollowCandidate ===> Extension in Follow <===\n" ) ;
// print ( 31 ) ;
LOG(ERR, "FtfTrack::debugFollowCandidate: Try hit %d\n", candidateHit->id ) ;
candidateHit->print ( 11 ) ;
//
// If the hit already used say it and forget about it
//
if ( candidateHit->track != 0 )
{
LOG(ERR, "FtfTrack::debugFollowCandidate: hit %d used in track %d\n",
candidateHit->id, id );
debugAsk () ;
// candidateHit->Show ( getPara()->color_candidate ) ;
candidateHit->print ( 3 ) ;
}
}
/*******************************************************************************
Reconstructs tracks
*********************************************************************************/
void FtfTrack::debugFollowSuccess ( double dxy, double dsz, double lxyChi2,
double lszChi2, double chi2_min,
FtfHit *candidateHit ) {
//
// Check whether track needs to be debugged
//
if ( !getPara()->trackDebug ) return ;
if ( getPara()->debugLevel < 2 ) return ;
//
// Show first level of info
//
double lchi2 = lxyChi2 + lszChi2 ;
LOG(ERR, " \n ------------------------------------- " ) ;
if ( lchi2 < chi2_min ){
LOG(ERR, "FtfTrack::debugFollowSuccess: %f Best Chi2, keep point !!!\n",
lchi2 );
if ( lchi2 < getPara()->goodHitChi2 ){
LOG(ERR, "This Chi2 is better than the good cut %f\n",
lchi2, getPara()->goodHitChi2 );
LOG(ERR, "Stop search !!! " );
}
}
else{
LOG(ERR, "FtfTrack::debugFollowSuccess: Hit %d worse than previous, forget it !! ",
candidateHit->id );
// candidateHit->Show ( getPara()->color_track ) ;
}
//
// Show second level of info
//
LOG(DBG, "FtfTrack::debugFollowSuccess:\n");
LOG(DBG, "dis_xy dis_sz %7.2e %7.2e\n ", dxy, dsz );
LOG(DBG, "Error xy sz %7.2e %7.2e\n ",
candidateHit->wxy, candidateHit->wz );
LOG(DBG, "xy:a1,a2;sz:a1,a2 %7.2f %7.2f %7.2f %7.2f\n",
a1Xy, a2Xy, a1Sz, a2Sz );
LOG(DBG, "ch2:xy sz tot min %7.2f %7.2f %7.2f %7.2f\n",
lxyChi2,lszChi2, lchi2, chi2_min );
}
debugAsk() ;
// candidateHit->Show ( getPara()->color_transparent ) ;
}<--- Invalid number of character ({) when these macros are defined: 'TRDEBUG'.
/*********************************************************************************
Routine to look for segments.
Segments are track starting chains
*******************************************************************************/
void FtfTrack::debugInVolume ( FtfHit *baseHit, FtfHit *candidateHit )
{
if ( getPara()->trackDebug && getPara()->debugLevel >= 2 ) {
/*----------------------------------------------------------------------------
Show the whole segment
----------------------------------------------------------------------------*/
// for ( startLoop() ; done() ; nextHit() ) {
// currentHit->Show ( getPara()->color_track ) ;
// }
// candidateHit->Show ( getPara()->color_candidate ) ;
/*----------------------------------------------------------------------------
Print relevant information
----------------------------------------------------------------------------*/
if ( nHits > getPara()->nHitsForSegment+1 ) Print ( 31 ) ;
LOG(ERR, "FtfTrack:debugInVolume: Try hit %d\n", candidateHit->id ) ;
candidateHit->print ( 11 ) ;
/*----------------------------------------------------------------------------
If the hit already used say it and forget about it
----------------------------------------------------------------------------*/
if ( candidateHit->track != 0 ) {
LOG(ERR, "FtfTrack:debugInVolume: hit %d used in track %d\n",
candidateHit->id, id+1 );
// candidateHit->Show ( 0 );
}
else {
double dphi = (double)fabs(baseHit->phi - candidateHit->phi) ;
double deta ;
if ( baseHit->dz < 1000 && candidateHit->dz < 1000 )
deta = (double)fabs(baseHit->eta - candidateHit->eta) ;
else
deta = 0.F ;
if ( dphi > getPara()->dphi )
LOG(ERR, "FtfTrack:debugInVolume: Hits too far apart in phi: %f \n",
dphi ) ;
if ( deta > getPara()->deta )
LOG(ERR, "FtfTrack:debugInVolume: Hits too far apart in eta: %f \n",
deta ) ;
}
debugAsk () ;
}
}
/*****************************************************************************
Fill track information tables
******************************************************************************/
void FtfTrack::debugNew ( )
{
if ( firstHit->id == getPara()->hitDebug ) getPara()->trackDebug = 1 ;
if ( getPara()->trackDebug && getPara()->debugLevel >= 1 )
{
LOG(DBG, "================================================ \n" );
LOG(DBG, "FtfTrack::debugNew:Starting track %d from point %d\n",
id, firstHit->id );
LOG(DBG, "================================================ \n" );
// firstHit->Show ( getPara()->color_track ) ;
debugAsk () ;
}
}
#endif
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