FLTK: math.h Source File

FLTK

math.h
1 //
2 // "$Id$"
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. Distribution and use rights are outlined in
9 // the file "COPYING" which should have been included with this file. If this
10 // file is missing or damaged, see the license at:
11 //
12 // http://www.fltk.org/COPYING.php
13 //
14 // Please report all bugs and problems on the following page:
15 //
16 // http://www.fltk.org/str.php
17 //
18
19 // Xcode on OS X includes files by recursing down into directories.
20 // This code catches the cycle and directly includes the required file.
21 #ifdef fl_math_h_cyclic_include
22 # include "/usr/include/math.h"
23 #endif
24
25 #ifndef fl_math_h
26 # define fl_math_h
27
28 # define fl_math_h_cyclic_include
29 # include <math.h>
30 # undef fl_math_h_cyclic_include
31
32 # ifdef __EMX__
33 # include <float.h>
34 # endif
35
36
37 # ifndef M_PI
38 # define M_PI 3.14159265358979323846
39 # define M_PI_2 1.57079632679489661923
40 # define M_PI_4 0.78539816339744830962
41 # define M_1_PI 0.31830988618379067154
42 # define M_2_PI 0.63661977236758134308
43 # endif // !M_PI
44
45 # ifndef M_SQRT2
46 # define M_SQRT2 1.41421356237309504880
47 # define M_SQRT1_2 0.70710678118654752440
48 # endif // !M_SQRT2
49
50 # if (defined(WIN32) || defined(CRAY)) && !defined(__MINGW32__) && !defined(__MWERKS__)
51
52 inline double rint(double v) {return floor(v+.5);}
53 inline double copysign(double a, double b) {return b<0 ? -a : a;}
54
55 # endif // (WIN32 || CRAY) && !__MINGW32__ && !__MWERKS__
56
57 #endif // !fl_math_h
58
59
60 //
61 // End of "$Id$".
62 //
- © 1998-2016 by Bill Spitzak and others.