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   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__) 
   52inline double rint(
double v) {
return floor(v+.5);}
 
   53inline double copysign(
double a, 
double b) {
return b<0 ? -a : a;}