Ext_errmx Class Reference

#include <Ext_errmx.h>

Inheritance diagram for Ext_errmx:

Ext_xp_err List of all members.

Public Member Functions

 Ext_errmx ()
 Ext_errmx (const Ext_errmx &errmx)
 Ext_errmx (const HepSymMatrix &err)
virtual ~Ext_errmx ()
void put_err (const double error[])
void put_err (const HepSymMatrix &err)
const HepSymMatrix & get_err () const
double get_plane_err (const Hep3Vector &np, const Hep3Vector &nr) const
const HepVector & get_plane_errs (const Hep3Vector &np, const Hep3Vector &nr, const Hep3Vector &nt) const
const Hep3Vector * get_tvs (const int view, const Hep3Vector &pv) const
const Hep3Vector * get_tvs (const Hep3Vector &pv) const
bool valid (bool msg) const
Ext_errmx & operator= (const Ext_errmx &errmx)

Protected Member Functions

void set_plane_errs (const Hep3Vector &nx, const Hep3Vector &ny, const Hep3Vector &nz) const

Protected Attributes

HepSymMatrix m_err

Private Attributes

bool m_valid
HepSymMatrix m_err3
HepVector m_err2
Hep3Vector m_nv [2]
HepMatrix m_R

Friends

std::ostream & operator<< (std::ostream &s, const Ext_errmx &errmx)

Detailed Description

Definition at line 36 of file Ext_errmx.h.

Constructor & Destructor Documentation

Ext_errmx::Ext_errmx (  ) 

Definition at line 29 of file Ext_errmx.cxx.

00029                      : m_err(Ndim_err,0), m_err3(3,0), m_R(3,3,0), 
00030         m_err2(2), m_valid(0) {}

Ext_errmx::Ext_errmx ( const Ext_errmx &  errmx  ) 

Definition at line 34 of file Ext_errmx.cxx.

00034                                            : m_err(err.m_err),
00035         m_err3(err.m_err3), m_R(err.m_R), m_err2(err.m_err2), 
00036         m_valid(err.m_valid) {}

Ext_errmx::Ext_errmx ( const HepSymMatrix &  err  ) 

Definition at line 38 of file Ext_errmx.cxx.

00038                                               : m_err(err), 
00039         m_err3(3,0), m_R(3,3,0), m_err2(2), m_valid(1) {}

virtual Ext_errmx::~Ext_errmx (  )  [inline, virtual]

Definition at line 49 of file Ext_errmx.h.

00049 {};

Member Function Documentation

const HepSymMatrix & Ext_errmx::get_err (  )  const [inline]

Definition at line 157 of file Ext_errmx.h.

References m_err.

Referenced by ExtSteppingAction::UserSteppingAction().

00157                                                      {
00158   return m_err;
00159 }

double Ext_errmx::get_plane_err ( const Hep3Vector &  np,
const Hep3Vector &  nr 
) const

Definition at line 85 of file Ext_errmx.cxx.

References Eps(), ers::error, Infinite(), and nr.

Referenced by ExtSteppingAction::UserSteppingAction().

00095 {
00096 
00097 // Check the validity of the error matrix.
00098 
00099   if( !(*this).valid( 0 ) ){
00100     //std::cout << "%WARNING at Ext_get_plane_err: You are trying to calculate"
00101 //      << " error \n           using an invalid error matrix." << std::endl;
00102   }
00103 
00104 // Construct 3 TCS axes.
00105 
00106 // x: nx --- unit vector which is perp to np and on the plane of nr and np.
00107 // y: nz x nx
00108 // z: nz( = np ) --- direction of the track.
00109 
00110   double nr_np( nr*np );
00111   double denom( 1.0 - nr_np*nr_np );
00112   double error( 0.0 );
00113 
00114   if( denom > Eps ){    // Track is not parallel to the readout direction.
00115 
00116     double fac( 1.0 / sqrt( denom ) );
00117     Hep3Vector nx( ( nr - nr_np * np ) * fac );
00118     Hep3Vector ny( np.cross( nx ) );
00119 
00120     (*this).set_plane_errs( nx, ny, np );
00121 
00122     double sigma2( m_err3( 1, 1 ) );    // Error along nx.
00123     if( sigma2 > 0 ){
00124       error = sqrt( sigma2 ) * fac;     // Error projection.
00125     }
00126 
00127   } else {      // Track is parallel to the readout direction.
00128 
00129     error = Infinite;
00130 
00131   }
00132   return( error );
00133 }

const HepVector & Ext_errmx::get_plane_errs ( const Hep3Vector &  np,
const Hep3Vector &  nr,
const Hep3Vector &  nt 
) const

Get the 2D projected error vector on the detector plane. {itemize} np: track direction unit vector. nr: readout direction unit vector. nt: ( np x nr ) unit vector. HepVector(1)= error(sigma) along the nr. HepVector(2)= error(sigma) along the nt. {itemize}

Definition at line 140 of file Ext_errmx.cxx.

References Eps(), and nr.

00151 {
00152 
00153 // Check the validity of the error matrix.
00154 
00155   if( !(*this).valid( 1 ) ){
00156 //    std::cout << "%WARNING at Ext_get_plane_errs: You are trying to calculate"
00157 //      << " error \n           using an invalid error matrix." << std::endl;
00158   }
00159 
00160   double nr_np( nr*np );
00161   double denom_r( 1.0 - nr_np*nr_np );
00162 
00163   if( denom_r > Eps ){  // nr is not parallel to the track direction: np.
00164 
00165     double nt_np( nt*np );
00166     double denom_t( 1.0 - nt_np*nt_np );
00167     double fac_r( 1.0 / sqrt( denom_r ) );
00168     Hep3Vector nx( ( nr - nr_np * np ) * fac_r );
00169     Hep3Vector ny( np.cross( nx ) );
00170 
00171     (*this).set_plane_errs( nx, ny, np );
00172 
00173     double sigma2( m_err3( 1, 1 ) );    // Error along nx.
00174     if( sigma2 > 0 ){
00175       m_err2( 1 ) = sqrt( sigma2 ) * fac_r;     // Error projection.
00176     } else {
00177       m_err2( 1 ) = 0.0;
00178     }
00179 
00180     if( denom_t > Eps ){   // nt is not parallel to the track direction: np.
00181       double fac_t( 1.0 / sqrt( denom_t ) );
00182       sigma2 = m_err3( 2, 2 );
00183       if( sigma2 > 0 ){
00184         m_err2( 2 ) = sqrt( sigma2 ) * fac_t;   // Error projection.
00185       } else {
00186         m_err2( 2 ) = 0.0;
00187       }
00188     } else {    // nt is parallel to the track direction: np.
00189       m_err2( 2 ) = (*this).get_plane_err( np, nt );
00190     }
00191   } else {      // nr is parallel to the track direction: np.
00192     m_err2( 1 ) = (*this).get_plane_err( np, nr );
00193     m_err2( 2 ) = (*this).get_plane_err( np, nt );
00194   }
00195   return( m_err2 );
00196 }

const Hep3Vector * Ext_errmx::get_tvs ( const Hep3Vector &  pv  )  const

Get the 2D projected track error perpendicular to a given vector at the current point. pv: a given vector, momentum vector, for example. {itemize} Hep3Vector(1)= error(1 sigma) along the direction which is perpendicular to pv on the plane formed by pv and z-axis. Hep3Vector(2)= error(1 sigma) along the direction which is (pv) x (HepVector(1) direction). {itemize}

Definition at line 278 of file Ext_errmx.cxx.

References nr, and unit.

00282 {
00283 
00284   Hep3Vector    np( pv.unit() );
00285   Hep3Vector    nz( 0.0, 0.0, 1.0 );
00286   Hep3Vector    nt( (nz.cross(np)).unit() );
00287   Hep3Vector    nr( nt.cross(np) );
00288 
00289   const HepVector & err_v = (*this).get_plane_errs( np, nr, nt );
00290   *m_nv         = err_v[0]*nr;
00291   *(m_nv+1)     = err_v[1]*nt;
00292   return( m_nv );
00293 
00294 }

const Hep3Vector * Ext_errmx::get_tvs ( const int  view,
const Hep3Vector &  pv 
) const

Get 2D projected track error perpendicular to a given vector at the current point. pv: a given vector, momentum vector for example. {itemize} view=1. {itemize} Hep3Vector(1)= error(1 sigma) along the direction which is perpendicular to pv on the xy plane. Hep3Vector(2)= error(1 sigma) along the direction which is (pv) x (HepVector(1) direction). {itemize} view=2. {itemize} Hep3Vector(1)= error(1 sigma) along the direction which is perpendicular to pv on the zy plane. Hep3Vector(2)= error(1 sigma) along the direction which is (pv) x (HepVector(1) direction). {itemize} view=3. {itemize} Hep3Vector(1)= error(1 sigma) along the direction which is perpendicular to pv on the zx plane. Hep3Vector(2)= error(1 sigma) along the direction which is (pv) x (HepVector(1) direction). {itemize} {itemize}

Definition at line 215 of file Ext_errmx.cxx.

References nr.

00221 {
00222 
00223   Hep3Vector    np( pv.unit() );
00224   Hep3Vector    nr;
00225 
00226   switch( view ){
00227 
00228   case 1:       // xy view
00229 
00230     if( np.x() != 0 || np.y() != 0 ){
00231       nr.setX(  np.y() );
00232       nr.setY( -np.x() );
00233       nr = nr.unit();
00234     } else {            // Pointing to z-direction.
00235       nr.setX( 1 );
00236     }
00237     break;
00238 
00239   case 2:       // zy view
00240 
00241     if( np.y() != 0 || np.z() != 0 ){
00242       nr.setY( -np.z() );
00243       nr.setZ(  np.y() );
00244       nr = nr.unit();
00245     } else {            // Pointing to x-direction.
00246       nr.setZ( 1 );
00247     }
00248     break;
00249 
00250   case 3:       // zx view
00251 
00252     if( np.z() != 0 || np.x() != 0 ){
00253       nr.setX( -np.z() );
00254       nr.setZ(  np.x() );
00255       nr = nr.unit();
00256     } else {            // Pointing to z-direction.
00257       nr.setZ( 1 );
00258     }
00259     break;
00260   }     /* End of switch */
00261 
00262   Hep3Vector nt( np.cross( nr ) );
00263   const HepVector & err_v = (*this).get_plane_errs( np, nr, nt );
00264   *m_nv         = err_v[0]*nr;
00265   *(m_nv+1)     = err_v[1]*nt;
00266   return( m_nv );
00267 }

Ext_errmx & Ext_errmx::operator= ( const Ext_errmx &  errmx  ) 

Definition at line 316 of file Ext_errmx.cxx.

References showlog::err, m_err, m_err2, m_err3, m_nv, m_R, and m_valid.

00317 {
00318   if( this != &err ){
00319     m_err       = err.m_err;
00320     m_err3      = err.m_err3;
00321     m_err2      = err.m_err2;
00322     m_R         = err.m_R;
00323     m_valid     = err.m_valid;
00324     *m_nv       = *err.m_nv;
00325     *(m_nv+1)   = *(err.m_nv+1);
00326   }
00327   return *this;
00328 }

void Ext_errmx::put_err ( const HepSymMatrix &  err  )  [inline]

Definition at line 148 of file Ext_errmx.h.

References m_err, and m_valid.

00149 {
00150   m_err = err;
00151   m_valid = 1;
00152 }

void Ext_errmx::put_err ( const double  error[]  ) 

Definition at line 45 of file Ext_errmx.cxx.

References genRecEmupikp::i, ganga-rec::j, m_err, and m_valid.

Referenced by Ext_xp_err::set_err(), and ExtSteppingAction::UserSteppingAction().

00046 {
00047   int ne = 0;
00048 
00049   for( int i = 1; i <= m_err.num_col(); i++ ){
00050     for( int j = 1; j <= i; j++ ){
00051       m_err.fast( i, j ) = error[ ne++ ];
00052     }
00053   }
00054   m_valid = 1;
00055 }

void Ext_errmx::set_plane_errs ( const Hep3Vector &  nx,
const Hep3Vector &  ny,
const Hep3Vector &  nz 
) const [protected]

Definition at line 60 of file Ext_errmx.cxx.

References m_err, m_err3, and m_R.

00062 {
00063 // Setup the rotation matrix.
00064 
00065   m_R( 1, 1 ) = nx.x();
00066   m_R( 1, 2 ) = nx.y();
00067   m_R( 1, 3 ) = nx.z();
00068   m_R( 2, 1 ) = ny.x();
00069   m_R( 2, 2 ) = ny.y();
00070   m_R( 2, 3 ) = ny.z();
00071   m_R( 3, 1 ) = nz.x();
00072   m_R( 3, 2 ) = nz.y();
00073   m_R( 3, 3 ) = nz.z();
00074 
00075 // Get the 3x3 sub matrix and Rotate the error matrix.
00076 
00077   m_err3 = (m_err.sub( 1, 3 )).similarity( m_R );
00078 
00079 }

bool Ext_errmx::valid ( bool  msg  )  const

Definition at line 300 of file Ext_errmx.cxx.

References Ext_err_valid(), m_err, and m_valid.

00301 {
00302   if( m_valid ){
00303     if( Ext_err_valid( msg, m_err, 6 ) ){
00304       return 1;
00305     } else {
00306       m_valid = 0;
00307       return 0;
00308     }
00309   } else {
00310     return 0;
00311   }
00312 }

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  s,
const Ext_errmx &  errmx 
) [friend]

Definition at line 333 of file Ext_errmx.cxx.

00334 {
00335   s << " m_valid: " << err.m_valid << '\n'
00336         << "m_err: " << err.m_err << " m_err3: " << err.m_err3 
00337         << " m_R: " << err.m_R << " m_err2: " << err.m_err2
00338         << " *m_nv: " << *err.m_nv 
00339         << " *(m_nv+1): " << *(err.m_nv+1)
00340         << std::endl;
00341   return s;
00342 }

Member Data Documentation

HepSymMatrix Ext_errmx::m_err [protected]

Definition at line 133 of file Ext_errmx.h.

Referenced by get_err(), Ext_xp_err::move(), operator=(), put_err(), set_plane_errs(), and valid().

HepVector Ext_errmx::m_err2 [mutable, private]

Definition at line 139 of file Ext_errmx.h.

Referenced by operator=().

HepSymMatrix Ext_errmx::m_err3 [mutable, private]

Definition at line 138 of file Ext_errmx.h.

Referenced by operator=(), and set_plane_errs().

Hep3Vector Ext_errmx::m_nv[2] [mutable, private]

Definition at line 140 of file Ext_errmx.h.

Referenced by operator=().

HepMatrix Ext_errmx::m_R [mutable, private]

Definition at line 141 of file Ext_errmx.h.

Referenced by operator=(), and set_plane_errs().

bool Ext_errmx::m_valid [mutable, private]

Definition at line 137 of file Ext_errmx.h.

Referenced by operator=(), put_err(), and valid().

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