28constexpr auto PI_F = 3.141592653589793f;
29constexpr auto PI_F_2 = 1.570796326794896f;
30constexpr auto PI_F_X_2 = 6.283185307179586f;
32constexpr auto PI_D = 3.14159265358979323846;
33constexpr auto PI_D_2 = 1.57079632679489661923;
34constexpr auto PI_D_X_2 = 6.28318530717958647692;
36constexpr auto FLOAT_MAX = 3.402823466e+38F;
37constexpr auto FLOAT_MIN = 1.175494351e-38F;