6 static constexpr
double PI = 3.14159265358979323846264338327950288419716939937510;
9 static constexpr
double HALF_PI = 1.57079632679489661923132169163975144209858469968755;
12 static constexpr
double Deg2Rad = 0.0174532925199432957692369076848861271344287188854172222222222222;
15 static constexpr
double Rad2Deg = 57.295779513082320876798154814105170332405472466564427711013084788;