FLTK 1.3.0
math.h
00001 //
00002 // "$Id: math.h 7903 2010-11-28 21:06:39Z matt $"
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; you can redistribute it and/or
00009 // modify it under the terms of the GNU Library General Public
00010 // License as published by the Free Software Foundation; either
00011 // version 2 of the License, or (at your option) any later version.
00012 //
00013 // This library is distributed in the hope that it will be useful,
00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016 // Library General Public License for more details.
00017 //
00018 // You should have received a copy of the GNU Library General Public
00019 // License along with this library; if not, write to the Free Software
00020 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00021 // USA.
00022 //
00023 // Please report all bugs and problems on the following page:
00024 //
00025 //     http://www.fltk.org/str.php
00026 //
00027 
00028 // Xcode on OS X includes files by recursing down into directories.
00029 // This code catches the cycle and directly includes the required file.
00030 #ifdef fl_math_h_cyclic_include 
00031 #  include "/usr/include/math.h"
00032 #endif
00033 
00034 #ifndef fl_math_h
00035 #  define fl_math_h
00036 
00037 #  define fl_math_h_cyclic_include 
00038 #  include <math.h>
00039 #  undef fl_math_h_cyclic_include 
00040 
00041 #  ifdef __EMX__
00042 #    include <float.h>
00043 #  endif
00044 
00045 
00046 #  ifndef M_PI
00047 #    define M_PI            3.14159265358979323846
00048 #    define M_PI_2          1.57079632679489661923
00049 #    define M_PI_4          0.78539816339744830962
00050 #    define M_1_PI          0.31830988618379067154
00051 #    define M_2_PI          0.63661977236758134308
00052 #  endif // !M_PI
00053 
00054 #  ifndef M_SQRT2
00055 #    define M_SQRT2         1.41421356237309504880
00056 #    define M_SQRT1_2       0.70710678118654752440
00057 #  endif // !M_SQRT2
00058 
00059 #  if (defined(WIN32) || defined(CRAY)) && !defined(__MINGW32__) && !defined(__MWERKS__)
00060 
00061 inline double rint(double v) {return floor(v+.5);}
00062 inline double copysign(double a, double b) {return b<0 ? -a : a;}
00063 
00064 #  endif // (WIN32 || CRAY) && !__MINGW32__ && !__MWERKS__
00065 
00066 #endif // !fl_math_h
00067 
00068 
00069 //
00070 // End of "$Id: math.h 7903 2010-11-28 21:06:39Z matt $".
00071 //