
// This file is part of the Herezh++ application.
//
// The finite element software Herezh++ is dedicated to the field
// of mechanics for large transformations of solid structures.
// It is developed by Gérard Rio (APP: IDDN.FR.010.0106078.000.R.P.2006.035.20600)
// INSTITUT DE RECHERCHE DUPUY DE LÔME (IRDL) <https://www.irdl.fr/>.
//
// Herezh++ is distributed under GPL 3 license ou ultérieure.
//
// Copyright (C) 1997-2022 Université Bretagne Sud (France)
// AUTHOR : Gérard Rio
// E-MAIL  : gerardrio56@free.fr
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
// For more information, please consult: <https://herezh.irdl.fr/>.


#include "ConstMath.h"

// def des variables static
double ConstMath::trespetit = 1.E-16;
double ConstMath::pasmalpetit = 1.E-12;
double ConstMath::petit = 1.E-10;
double ConstMath::unpeupetit = 1.E-7;
double ConstMath::unpeugrand = 1.E7;
double ConstMath::grand = 1.E10; 
double ConstMath::pasmalgrand = 1.E12; 
double ConstMath::tresgrand = 1.E16; 
double ConstMath::Pi = 3.141592653589793238463;
double ConstMath::eps_machine = ConstMath::d_epsilon();

//******************************************************************************
//
//  Purpose:
//
//    D_EPSILON returns the round off unit for double precision arithmetic.
//
//  Discussion:
//
//    D_EPSILON is a number R which is a power of 2 with the property that,
//    to the precision of the computer's arithmetic,
//      1 < 1 + R
//    but 
//      1 = ( 1 + R / 2 )
//
//  Modified:
//
//    06 May 2003
//
//  Author:
//
//    John Burkardt
//
//  Parameters:
//
//    Output, float D_EPSILON, the floating point round-off unit.
//
double ConstMath::d_epsilon ()
 {
  float r = 1.0E+00;
  while ( 1.0E+00 < ( double ) ( 1.0E+00 + r )  )
   {r = r / 2.0E+00; };
  return ( 2.0E+00 * r );
 };
