static const double PI(3.14159265358979323846);
PI constant as a double.static const float PI2((float)PI*2.0f);
PI constant multiplied by 2 as a float.static const float Invert2PI(0.5f/(float)PI);
PI constant inverted as a float.static const float MilliEPS(1.0e-03f);
0.001 as a float.static const float MicroEPS(1.0e-06f);
0.000 001 as a float.static const float NanoEPS(1.0e-09f);
0.000 000 001 as a float.static const float PicoEPS(1.0e-012f);
0.000 000 000 001 as a float.