/usr/include/sofa/helper/rmath.h is in libsofa1-dev 1.0~beta4-9.
This file is owned by root:root, with mode 0o644.
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* SOFA, Simulation Open-Framework Architecture, version 1.0 beta 4 *
* (c) 2006-2009 MGH, INRIA, USTL, UJF, CNRS *
* *
* 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 *
* along with this library; if not, write to the Free Software Foundation, *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
*******************************************************************************
* SOFA :: Framework *
* *
* Authors: M. Adam, J. Allard, B. Andre, P-J. Bensoussan, S. Cotin, C. Duriez,*
* H. Delingette, F. Falipou, F. Faure, S. Fonteneau, L. Heigeas, C. Mendoza, *
* M. Nesme, P. Neumann, J-P. de la Plata Alcade, F. Poyer and F. Roy *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#ifndef SOFA_HELPER_RMATH_H
#define SOFA_HELPER_RMATH_H
#include <sofa/helper/helper.h>
#include <math.h>
namespace sofa
{
namespace helper
{
#ifdef M_PI
#define R_PI M_PI
#else
#define R_PI 3.141592653589793238462
#endif
/*
// Most portable version, but also the slowest
inline int rfloor(double r)
{
return ((int)(r+1000000))-1000000;
}
inline int rnear(double r)
{
return ((int)(r+1000000.5))-1000000;
}
*/
/*
// Does not work on gcc 4.x due to more aggressive optimizations
inline int rfloor(double r)
{
static const double FLOATTOINTCONST=(1.5*(1LL<<(52-16)));
r+=FLOATTOINTCONST;
return ((((int*)&r)[0])>>16);
}
inline int rnear(double r)
{
static const double FLOATTOINTCONST_0_5=(1.5*(1LL<<(52-16)))+0.5;
r+=FLOATTOINTCONST_0_5;
return ((((int*)&r)[0])>>16);
}
*/
// Works on gcc 3.x and 4.x
template<class real>
inline int rfloor(real r)
{
static const double FLOATTOINTCONST=(1.5*(1LL<<(52-16)));
union { double d;
int i;
} temp;
temp.d = r+FLOATTOINTCONST;
return ((temp.i)>>16);
}
template<class real>
inline int rnear(real r)
{
static const double FLOATTOINTCONST_0_5=(1.5*(1LL<<(52-16)))+0.5;
union { double d;
int i;
} temp;
temp.d = r+FLOATTOINTCONST_0_5;
return ((temp.i)>>16);
}
inline int rceil(double r)
{
return -rfloor(-r);
}
template<class real>
inline real rabs(real r)
{
return (r>=0)?r:-r;
}
template<class real>
inline real rmin(real r, real s)
{
return (r<=s)?r:s;
}
template<class real>
inline real rmax(real r, real s)
{
return (r>s)?r:s;
}
template<class T>
inline T rlerp(const T& a, const T& b, float f)
{
return a+(b-a)*f;
}
template<class T>
inline T rsqrt(const T& a)
{
return (T)sqrtf((float)a);
}
inline double rsqrt(const double& a)
{
#if defined(__arm__) || defined(__mips__) || defined(__sh__)
return sqrt((double)a);
#else
return (double)sqrtl((long double)a);
#endif
}
inline long double rsqrt(const long double& a)
{
#if defined(__arm__) || defined(__mips__) || defined(__sh__)
return (long double)sqrt((double)a);
#else
return sqrtl(a);
#endif
}
template<class T>
inline const T SQR(const T& a)
{
return a*a;
}
template<class T>
inline const T SIGN(const T &a, const T &b)
{
return b >= 0 ? (a >= 0 ? a : -a) : (a >= 0 ? -a : a);
}
template<class T>
inline void SWAP(T &a, T &b)
{
T dum=a;
a=b;
b=dum;
}
inline void shft3(double &a, double &b, double &c, const double d)
{
a=b;
b=c;
c=d;
}
template<class T>
inline const T round(const T& x)
{
return (x<0?ceil(x-0.5):floor(x+0.5));
}
//inline void printerror( const char* msg )
//{
// std::cerr<<msg<<std::endl;
// assert(0);
//}
} // namespace helper
} // namespace sofa
#endif
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