Constants.h

// -*- C++ -*-
//
// Constants.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2007 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_Constants_H
#define ThePEG_Constants_H

// This file defines a number of useful constants, placed in the
// namespace <!id>ThePEG::Constants<!!id>.

#include "Unitsystem.h"
#include <cmath>
#include <cfloat>

namespace ThePEG {

namespace Constants {

using namespace ThePEG::Units;

const Length MaxLength = 1.0e20 * meter;

const Energy MaxEnergy = 1.0e6 * GeV;

const Energy2 MaxEnergy2 = MaxEnergy * MaxEnergy;

const double MaxDouble = DBL_MAX;

const double HugeDouble = DBL_MAX * 1.0e-4;

const double MaxFloat = FLT_MAX;

const double HugeFloat = FLT_MAX * 0.01;

const double MaxRapidity = 100.0;

const double pi    = M_PI;

const double twopi = 2.0 * pi;

const long MaxInt = 1000000000L;

const double epsilon = DBL_EPSILON;

const double EulerGamma = 0.5772156649015329;
}

}

#endif /* ThePEG_Constants_H */

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