78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
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// This file is part of the Herezh++ application.
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//
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// The finite element software Herezh++ is dedicated to the field
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// of mechanics for large transformations of solid structures.
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// It is developed by Gérard Rio (APP: IDDN.FR.010.0106078.000.R.P.2006.035.20600)
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// INSTITUT DE RECHERCHE DUPUY DE LÔME (IRDL) <https://www.irdl.fr/>.
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//
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// Herezh++ is distributed under GPL 3 license ou ultérieure.
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//
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// Copyright (C) 1997-2021 Université Bretagne Sud (France)
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// AUTHOR : Gérard Rio
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// E-MAIL : gerardrio56@free.fr
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License,
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// or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// For more information, please consult: <https://herezh.irdl.fr/>.
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#include "ConstMath.h"
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// def des variables static
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double ConstMath::trespetit = 1.E-16;
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double ConstMath::pasmalpetit = 1.E-12;
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double ConstMath::petit = 1.E-10;
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double ConstMath::unpeupetit = 1.E-7;
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double ConstMath::unpeugrand = 1.E7;
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double ConstMath::grand = 1.E10;
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double ConstMath::pasmalgrand = 1.E12;
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double ConstMath::tresgrand = 1.E16;
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double ConstMath::Pi = 3.141592653589793238463;
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double ConstMath::eps_machine = ConstMath::d_epsilon();
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//******************************************************************************
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//
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// Purpose:
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//
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// D_EPSILON returns the round off unit for double precision arithmetic.
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//
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// Discussion:
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//
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// D_EPSILON is a number R which is a power of 2 with the property that,
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// to the precision of the computer's arithmetic,
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// 1 < 1 + R
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// but
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// 1 = ( 1 + R / 2 )
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//
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// Modified:
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//
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// 06 May 2003
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//
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// Author:
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//
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// John Burkardt
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//
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// Parameters:
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//
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// Output, float D_EPSILON, the floating point round-off unit.
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//
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double ConstMath::d_epsilon ()
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{
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float r = 1.0E+00;
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while ( 1.0E+00 < ( double ) ( 1.0E+00 + r ) )
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{r = r / 2.0E+00; };
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return ( 2.0E+00 * r );
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};
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