math.h

来自「guide and some example with visualC++」· C头文件 代码 · 共 62 行

//
// "$Id: math.h,v 1.2 2002/12/01 15:38:37 neurosurg Exp $"
//
// Math header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2002 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "[e-mail]".
//

#ifndef fl_math_h
#  define fl_math_h

#  include <math.h>


#  ifndef M_PI
#    define M_PI            3.14159265358979323846
#    define M_PI_2          1.57079632679489661923
#    define M_PI_4          0.78539816339744830962
#    define M_1_PI          0.31830988618379067154
#    define M_2_PI          0.63661977236758134308
#  endif // !M_PI

#  ifndef M_SQRT2
#    define M_SQRT2         1.41421356237309504880
#    define M_SQRT1_2       0.70710678118654752440
#  endif // !M_SQRT2

#  ifdef __EMX__
#    include <float.h>
#  endif

#  if (defined(WIN32) || defined(CRAY)) && !defined(__MINGW32__) && !defined(__MWERKS__)

inline double rint(double v) {return floor(v+.5);}
inline double copysign(double a, double b) {return b<0 ? -a : a;}

#  endif // (WIN32 || CRAY) && !__MINGW32__ && !__MWERKS__

#endif // !fl_math_h


//
// End of "$Id: math.h,v 1.2 2002/12/01 15:38:37 neurosurg Exp $".
//