FLTK 1.3.0
math.h
00001 //
00002 // "$Id$"
00003 //
00004 // Math header file for the Fast Light Tool Kit (FLTK).
00005 //
00006 // Copyright 1998-2010 by Bill Spitzak and others.
00007 //
00008 // This library is free software. Distribution and use rights are outlined in
00009 // the file "COPYING" which should have been included with this file.  If this
00010 // file is missing or damaged, see the license at:
00011 //
00012 //     http://www.fltk.org/COPYING.php
00013 //
00014 // Please report all bugs and problems on the following page:
00015 //
00016 //     http://www.fltk.org/str.php
00017 //
00018 
00019 // Xcode on OS X includes files by recursing down into directories.
00020 // This code catches the cycle and directly includes the required file.
00021 #ifdef fl_math_h_cyclic_include 
00022 #  include "/usr/include/math.h"
00023 #endif
00024 
00025 #ifndef fl_math_h
00026 #  define fl_math_h
00027 
00028 #  define fl_math_h_cyclic_include 
00029 #  include <math.h>
00030 #  undef fl_math_h_cyclic_include 
00031 
00032 #  ifdef __EMX__
00033 #    include <float.h>
00034 #  endif
00035 
00036 
00037 #  ifndef M_PI
00038 #    define M_PI            3.14159265358979323846
00039 #    define M_PI_2          1.57079632679489661923
00040 #    define M_PI_4          0.78539816339744830962
00041 #    define M_1_PI          0.31830988618379067154
00042 #    define M_2_PI          0.63661977236758134308
00043 #  endif // !M_PI
00044 
00045 #  ifndef M_SQRT2
00046 #    define M_SQRT2         1.41421356237309504880
00047 #    define M_SQRT1_2       0.70710678118654752440
00048 #  endif // !M_SQRT2
00049 
00050 #  if (defined(WIN32) || defined(CRAY)) && !defined(__MINGW32__) && !defined(__MWERKS__)
00051 
00052 inline double rint(double v) {return floor(v+.5);}
00053 inline double copysign(double a, double b) {return b<0 ? -a : a;}
00054 
00055 #  endif // (WIN32 || CRAY) && !__MINGW32__ && !__MWERKS__
00056 
00057 #endif // !fl_math_h
00058 
00059 
00060 //
00061 // End of "$Id$".
00062 //