constants.h

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/* Copyright (C) 2000-2013 CEA
 *
 * This software and supporting documentation were developed by
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#ifndef PRIMATOLOGIST_MATH_CONSTANTS_H
#define PRIMATOLOGIST_MATH_CONSTANTS_H
 
namespace aims {
namespace math {
 
  // PI
  const double PI               = 3.14159265358979323846;     // pi
  const double TWO_PI           = 6.28318530717958647693;     // 2*pi
  const double PI_D_TWO         = 1.57079632679489661923;     // pi/2
  const double ONE_D_PI         = 0.318309886183790671538;    // 1/pi
  const double TWO_D_PI         = 0.636619772367581343076;    // 2/pi
  const double ONE_D_TWO_PI     = 0.707106781186547524400;    // 1/(2*pi)
  const double FOUR_M_PI        = 0.858407346410206761537;    // 4-pi
  const double PI_M_THREE       = 0.141592653589793238463;    // pi-3
  // SQRT[PI]
  const double RT_PI            = 1.77245385090551602720;     // sqrt[pi]
  const double RT_PI_D_RT_TWO   = 1.25331413731550025121;     // sqrt[pi/2]
  const double RT_TWO_PI        = 2.50662827463100050242;     // sqrt[2*pi]
  const double TWO_D_RT_PI      = 1.12837916709551257390;     // 2/sqrt[pi]
  const double ONE_D_RT_TWO_PI  = 0.398942280401432677939;    // 1/sqrt[2*pi]
  const double POW23_FOUR_M_PI  = 0.795316767371597544348;    // (4-pi)^{2/3}
  const double ONE_D_RT_PI      = TWO_D_RT_PI / 2.0 ;         // 1/sqrt[pi]
  // SQRT[2]
  const double RT_TWO           = 1.41421356237309504880;     // sqrt[2]
  const double ONE_D_RT_TWO     = 0.707106781186547524401;    // 1/sqrt[2]
  // FRAC
  const double ONE_D_THREE      = 0.333333333333333333333;    // 1/3
  const double TWO_D_THREE      = 0.666666666666666666667;    // 2/3
 
} // namespace math
} // namespace aims
 
#endif // PRIMATOLOGIST_MATH_CONSTANTS_H