TrkParams.cxx

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//--------------------------------------------------------------------------
// File and Version Information:
//      $Id: TrkParams.cxx,v 1.1.1.1 2005/04/21 06:01:42 zhangy Exp $
//
// Description:
//     Implementation of TrkParams class
//
// Environment:
//      Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author(s): Dave Brown, Steve Schaffner
//------------------------------------------------------------------------
// #include "BaBar/BaBar.h"
#include "TrkBase/TrkParams.h"
#include <assert.h>
#include <iostream>
using std::ostream;
 
//  Construct with the correct dimension
//--------------------------------------
TrkParams::TrkParams( int ndim )
    : DifIndepPar( ndim )
    , _weightInverted( false )
//--------------------------------------
{}
 
//  Construct from an input parameter vector and covariance matrix
//--------------------------------------
TrkParams::TrkParams( const HepVector& pvec, const HepSymMatrix& pcov )
    : DifIndepPar( pvec, pcov )
    , _weightInverted( false )
//--------------------------------------
{}
 
// copy constructor
//--------------------------------------
TrkParams::TrkParams( const TrkParams& old )
    : DifIndepPar( old )
    , _weightInverted( old._weightInverted )
    , _weightMatrix( old._weightMatrix )
//--------------------------------------
{}
 
// base implementation of clone function
//--------------------------------------
TrkParams* TrkParams::clone() const {
  //--------------------------------------
  return new TrkParams( *this );
}
 
//--------------------------------------
TrkParams::~TrkParams() {}
//--------------------------------------
 
//   Assignment operator
//--------------------------------------
TrkParams& TrkParams::operator=( const TrkParams& other ) {
  //--------------------------------------
  if ( this == &other ) return *this;
  parameter()     = other.parameter();
  covariance()    = other.covariance();
  _weightInverted = other._weightInverted;
  _weightMatrix   = other._weightMatrix;
  return *this;
}
 
//--------------------------------------
void TrkParams::printAll( ostream& os ) const {
  //--------------------------------------
  DifIndepPar::printAll( os );
}
 
const HepSymMatrix& TrkParams::weightMatrix() const {
 
  if ( !_weightInverted )
  {
    _weightMatrix = covariance();
    int invStatus;
    _weightMatrix.invert( invStatus );
    _weightInverted = true;
  }
  return _weightMatrix;
}