FL/math.h

   1 //
   2 // "$Id: math.h 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Math header file for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28 // Xcode on OS X includes files by recursing down into directories.
  29 // This code catches the cycle and directly includes the required file.
  30 #ifdef fl_math_h_cyclic_include
  31 #  include "/usr/include/math.h"
  32 #endif
  33
  34 #ifndef fl_math_h
  35 #  define fl_math_h
  36
  37 #  define fl_math_h_cyclic_include
  38 #  include <math.h>
  39 #  undef fl_math_h_cyclic_include
  40
  41 #  ifdef __EMX__
  42 #    include <float.h>
  43 #  endif
  44
  45
  46 #  ifndef M_PI
  47 #    define M_PI            3.14159265358979323846
  48 #    define M_PI_2          1.57079632679489661923
  49 #    define M_PI_4          0.78539816339744830962
  50 #    define M_1_PI          0.31830988618379067154
  51 #    define M_2_PI          0.63661977236758134308
  52 #  endif // !M_PI
  53
  54 #  ifndef M_SQRT2
  55 #    define M_SQRT2         1.41421356237309504880
  56 #    define M_SQRT1_2       0.70710678118654752440
  57 #  endif // !M_SQRT2
  58
  59 #  if (defined(WIN32) || defined(CRAY)) && !defined(__MINGW32__) && !defined(__MWERKS__)
  60
  61 inline double rint(double v) {return floor(v+.5);}
  62 inline double copysign(double a, double b) {return b<0 ? -a : a;}
  63
  64 #  endif // (WIN32 || CRAY) && !__MINGW32__ && !__MWERKS__
  65
  66 #endif // !fl_math_h
  67
  68
  69 //
  70 // End of "$Id: math.h 7903 2010-11-28 21:06:39Z matt $".
  71 //