Reconstruction/MdcPatRec/PatBField/src/BField.cxx

Go to the documentation of this file.

//--------------------------------------------------------------------------
// File and Version Information:
//  $Id: BField.cxx,v 1.2 2008/09/17 08:30:39 zhangy Exp $
//
// Description:
//  Class BField; encapsulates the magnetic field.
//
//      See header for more info.
//
// Environment:
//  Software developed for the BESIII Detector at BEPCII
//
// Author List:
//  Bob Jacobsen        Original Author
//  Zhang Yao       Only keep nominal field
//
// Copyright Information:
//  Copyright (C) 1995  Lawrence Berkeley Laboratory
//
//------------------------------------------------------------------------
 
//-----------------------
// This Class's Header --
//-----------------------
#include "PatBField/BField.h"
#include "MdcGeom/Constants.h"
#include <iostream>
 
using MdcPatRec::BField;
 
const double BField::cmTeslaToGeVc = Constants::c / 1.0E13;
const double BField::gaussToTesla  = 1000.;
 
// constructor
BField::BField( IBesMagFieldSvc* magSvc ) { m_pIMF = magSvc; }
 
// destroy
BField::~BField() {}
 
// field z of nominal field
double BField::bFieldZ() const { return m_pIMF->getReferField() * gaussToTesla; }
 
void BField::print() const {
  std::cout << "Default constant field" << std::endl;
  std::cout << "nominal Field: " << bFieldNominal() << std::endl;
}
 
double BField::bFieldNominal() const { return bFieldZ(); }