OpenSceneGraph/include/osg/Math

//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
//Distributed under the terms of the GNU Library General Public License (LGPL)
//as published by the Free Software Foundation.

#ifndef __OSG_MATH
#define __OSG_MATH

#include <math.h>

#if defined(WIN32) || defined (macintosh)
    #include <float.h>
#endif


// PJA MAC OSX
// This appears to be the simplest way to get these defined under MACOSX
// where they arent in math.h

#ifndef acosf
#define acosf (float)acos
#endif

#ifndef asinf
#define asinf (float)asin
#endif

#ifndef cosf
#define cosf (float)cos
#endif

#ifndef sinf
#define sinf (float)sin
#endif

#ifndef logf
#define logf (float)log
#endif

#ifndef floorf
#define floorf (float)floor
#endif

#ifndef powf
#define powf (float)pow
#endif

#ifndef sqrtf
#define sqrtf (float)sqrt
#endif

#ifndef fabsf
#define fabsf (float)fabs
#endif


namespace osg {

// define the stand trig values
#ifdef PI
#undef PI
#undef PI_2
#undef PI_4
#endif
const double PI   = 3.14159265358979323846;
const double PI_2 = 1.57079632679489661923;
const double PI_4 = 0.78539816339744830962;


inline double inDegrees(double angle) { return angle*PI/180.0; }
inline double inRadians(double angle) { return angle; }

inline double DegreesToRadians(double angle) { return angle*PI/180.0; }
inline double RadiansToDegrees(double angle) { return angle*180.0/PI; }

#if defined(WIN32) && !defined(__CYGWIN__)
    inline bool isNaN(float v) { return _isnan(v)!=0; }
    inline bool isNaN(double v) { return _isnan(v)!=0; }
#else
    inline bool isNaN(float v) { return isnan(v); }
    inline bool isNaN(double v) { return isnan(v); }
#endif

}

#endif  // __OSG_MATH