#ifndef QF_MATH
#define QF_MATH

namespace qf {
typedef long double qf_float;
static const double pi = 3.1415926535897932384626433832795029; /* pi       */
static const double one_over_pi = 0.3183098861837906715377675267450287;                       /* 1/pi     */
static const double ln2 = 0.6931471805599453094172321214581766; /* log_e(2) */
} // namespace qf
#endif