21 #ifdef fl_math_h_cyclic_include  
   22 #  include "/usr/include/math.h" 
   28 #  define fl_math_h_cyclic_include  
   30 #  undef fl_math_h_cyclic_include  
   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 
   46 #    define M_SQRT2         1.41421356237309504880 
   47 #    define M_SQRT1_2       0.70710678118654752440 
   50 #  if (defined(WIN32) || defined(CRAY)) && !defined(__MINGW32__) && !defined(__MWERKS__) 
   52 inline double rint(
double v) {
return floor(v+.5);}
 
   53 inline double copysign(
double a, 
double b) {
return b<0 ? -a : a;}
 
   55 #  endif // (WIN32 || CRAY) && !__MINGW32__ && !__MWERKS__