Utility.h

/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2010 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributors: Luka Santelj, Rok Pestotnik                              *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
 
#ifndef ARICHUTILITY_H
#define ARICHUTILITY_H
 
#include <TVector3.h>
#include <TRotation.h>
 
namespace Belle2 {
  namespace arich {
 
    double Erf(double x);
 
 
    TVector3 Refraction(const TVector3 s,  const double n);
 
 
    int Refraction(TVector3 s, TVector3 norm, double n, TVector3& a);
 
 
    TVector3 setThetaPhi(double theta, double fi);
 
 
    TRotation TransformFromFixed(TVector3 r);
 
 
    TRotation TransformToFixed(TVector3 r);
 
 
    double  ExpectedCherenkovAngle(double p, double mass, double refind);
 
 
    double SquareInt(double aaa, double fi, double mean, double sigma);
 
  } // namespace arich
} // namespace Belle2
 
#endif