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global.H

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/*
 * Copyright 2000, Brown University, Providence, RI.
 * 
 *                         All Rights Reserved
 * 
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose other than its incorporation into a
 * commercial product is hereby granted without fee, provided that the
 * above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Brown University not be used in
 * advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission.
 * 
 * BROWN UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY
 * PARTICULAR PURPOSE.  IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE FOR
 * ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#ifndef AMOD_MATH_LIB_INC_GLOBAL_H
#define AMOD_MATH_LIB_INC_GLOBAL_H

// DESCRIPTION:
//
// The basic include file to be included into any modeler file. It contains
// some very basic stuff, needed almost everywhere in the modeler.
//

#include <math.h>

#ifndef DllExp
#include "std/dllimpexp.H"
#endif

#include "std/config.H"

// Some compilers don't define these constants
#if defined(WIN32) || defined(__KCC)
#define M_PI        3.14159265358979323846
#define M_PI_2      1.57079632679489661923
#define M_LN2           0.69314718055994530942
#define M_SQRT2         1.41421356237309504880
#endif

// Include some very frequently used header files so that they do not have
// to be included every time
//
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

// Don't use the following global variables directly, use the inline functions
// instead. We have to keep these variables in the header file to be able to
// inline the access functions.
//
extern DllImpExp double       gEpsAbsMath;
extern DllImpExp double       gEpsAbsSqrdMath;
extern DllImpExp const double gEpsNorMath;
extern DllImpExp const double gEpsNorSqrdMath;
extern DllImpExp const double gEpsZeroMath;  // Really a very small value


inline double epsAbsMath    () { return gEpsAbsMath;     }
inline double epsAbsSqrdMath() { return gEpsAbsSqrdMath; }

inline double epsNorMath    () { return gEpsNorMath;     }
inline double epsNorSqrdMath() { return gEpsNorSqrdMath; }

extern DllImpExp void setEpsAbsMath(double eps);

// Hack to get around bug in KAI's math functions
#ifdef __KCC
#define sqrt(x)  sqrt(double(x))
#define log(x)   log(double(x))
#define pow(x,y) pow(double(x),double(y))
#endif

#ifndef GLUE_NEEDS_DOUBLE_STAR_EXPLICIT
template <class T>
inline T operator *(double s, const T &p) { return p * s; }
#endif


// ensure numerical error doesn't cause a value outside the range [-1,1]
// to be passed to the acos function.
extern double   Acos(double x);

// Forward declaration of some commonly used classes so that we do not have to
// forward-declare them in header files every time they are needed.
//


#endif

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