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153 | /* *****************************************************************
MESQUITE -- The Mesh Quality Improvement Toolkit
Copyright 2004 Sandia Corporation and Argonne National
Laboratory. Under the terms of Contract DE-AC04-94AL85000
with Sandia Corporation, the U.S. Government retains certain
rights in this software.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
(lgpl.txt) along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
[email protected], [email protected], [email protected],
[email protected], [email protected], [email protected],
[email protected]
***************************************************************** */
/*!
\file Exponent.cpp
\brief
\author Jason Kraftcheck
\date 2005-5-2
*/
#include "Exponent.hpp"
namespace MBMesquite
{
Exponent::constMemberPtr Exponent::get_func_ptr( double exponent )
{
if( exponent == 0.0 )
return &Exponent::pow0;
else if( exponent == 1.0 )
return &Exponent::pow1;
else if( exponent == 0.5 )
return &Exponent::squareRoot;
else if( exponent == 1. / 3. )
return &Exponent::cubeRoot;
else if( exponent == -1. / 3. )
return &Exponent::invCubeRoot;
else if( exponent == 2. / 3. )
return &Exponent::powTwoThirds;
else if( exponent == -2. / 3. )
return &Exponent::invTwoThirds;
else if( exponent == 2.0 )
return &Exponent::pow2;
else if( exponent == -1.0 )
return &Exponent::inverse;
else if( exponent == -0.5 )
return &Exponent::invSquareRoot;
else if( exponent == 1.5 )
return &Exponent::powThreeHalves;
else if( exponent == -2.0 )
return &Exponent::invSquare;
else if( std::floor( exponent ) == exponent )
{
if( exponent > 0.0 )
return &Exponent::powPositiveInt;
else
return &Exponent::powNegativeInt;
}
else
return &Exponent::std_pow;
}
void Exponent::set_exponent( double exponent )
{
mExponent = exponent;
funcPointer = get_func_ptr( exponent );
}
double Exponent::pow0( double ) const<--- The function 'pow0' is never used.
{
return 1.0;
}
double Exponent::pow1( double x ) const<--- The function 'pow1' is never used.
{
return x;
}
double Exponent::pow2( double x ) const<--- The function 'pow2' is never used.
{
return x * x;
}
double Exponent::squareRoot( double x ) const<--- The function 'squareRoot' is never used.
{
return std::sqrt( x );
}
double Exponent::cubeRoot( double x ) const<--- The function 'cubeRoot' is never used.
{
return MBMesquite::cbrt( x );
}
double Exponent::invCubeRoot( double x ) const<--- The function 'invCubeRoot' is never used.
{
return 1.0 / MBMesquite::cbrt( x );
}
double Exponent::powTwoThirds( double x ) const<--- The function 'powTwoThirds' is never used.
{
return MBMesquite::cbrt_sqr( x );
}
double Exponent::invTwoThirds( double x ) const<--- The function 'invTwoThirds' is never used.
{
return 1.0 / MBMesquite::cbrt_sqr( x );
}
double Exponent::std_pow( double x ) const<--- The function 'std_pow' is never used.
{
return std::pow( x, mExponent );
}
double Exponent::inverse( double x ) const
{
return 1.0 / x;
}
double Exponent::invSquareRoot( double x ) const<--- The function 'invSquareRoot' is never used.
{
return 1.0 / std::sqrt( x );
}
double Exponent::powThreeHalves( double x ) const<--- The function 'powThreeHalves' is never used.
{
return x * x * x / std::sqrt( x );
}
double Exponent::invSquare( double x ) const<--- The function 'invSquare' is never used.
{
return 1.0 / ( x * x );
}
double Exponent::powPositiveInt( double x ) const<--- The function 'powPositiveInt' is never used.
{
double result = x;
for( int i = (int)mExponent - 1; i > 0; --i )
result *= x;
return result;
}
double Exponent::powNegativeInt( double x ) const<--- The function 'powNegativeInt' is never used.
{
double result = x;
for( int i = ( -(int)mExponent ) - 1; i > 0; --i )
result *= x;
return 1.0 / result;
}
} // namespace MBMesquite
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