DinesRtRelation.cxx

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/*
  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
*/
 
#include "TRT_ConditionsData/DinesRtRelation.h"
//comment
namespace TRTCond
{
 
  DinesRtRelation& DinesRtRelation::operator=(const DinesRtRelation& rhs) 
 {
    if ( this != &rhs){
        m_status = rhs.m_status ;
        set(rhs.m_cal) ;
    }
    return *this ;
  }
 
 
  float DinesRtRelation::radius( float time ) const 
  { 
    double rmin0 = m_cal[0];
    double rho = m_cal[1];
    double v = m_cal[2];
    double t_const = m_cal[3]; // tw-t0
    double r_squared = (4*rho*rho*std::sin(v*(time-t_const)/(2*rho))-rmin0*rmin0)/(1-0.25*rmin0*rmin0); 
    double r = 0;
    if (r_squared>0) r = std::sqrt(r_squared);
 
    return r;
  }
  
  float DinesRtRelation::drdt( float time ) const 
  { 
    double rmin0 = m_cal[0];
    double rho = m_cal[1];
    double v = m_cal[2];
    double t_const = m_cal[3]; // tw-t0
 
    
    double drdt = 
      0.5/std::sqrt((4*rho*rho*std::sin(v*(time-t_const)/(2*rho))*std::sin(v*(time-t_const)/(2*rho))-rmin0*rmin0)/(1-0.25*rmin0*rmin0))*
      4*rho*rho/(1-0.25*rmin0*rmin0)*
      2*std::sin(v*(time-t_const)/(2*rho))*
      std::cos(v*(time-t_const)/(2*rho))*
      v/(2*rho);
 
    return drdt;
 
  }
  
  float DinesRtRelation::drifttime(float r) const 
  {
    double rmin0 = m_cal[0];
    double rho = m_cal[1];
    double v = m_cal[2];
    double t_const = m_cal[3];// tw-t0
    double t = t_const + 2*rho/v*std::asin(std::sqrt(rmin0*rmin0*(1-0.25*r*r)+r*r)/(2*rho)); 
 
    return t;
  }
  
 
  bool DinesRtRelation::isequal(const RtRelation& rhs) const 
  {
    const DinesRtRelation* rhsp = dynamic_cast<const DinesRtRelation*>(&rhs) ;
    return rhsp && (*rhsp)==*this ;
  }
  
 
  std::ostream& DinesRtRelation::write( std::ostream& os ) const 
  {
    return os << m_cal[0] << " " << m_cal[1] << " " 
          << m_cal[2] << " " << m_cal[3] << " " ;
  }
 
  std::istream& DinesRtRelation::read( std::istream& is ) 
  {
    return is >> m_cal[0] >> m_cal[1] >> m_cal[2] >> m_cal[3] ;
  }
}