3 #define _USE_MATH_DEFINES 11 const double PI_HALF = M_PI/2.0;
18 const double PI_3_HALF = PI_HALF*3.0;
25 const double PI_2 = M_PI*2.0;
32 const double PI_4 = M_PI*4.0;
39 const double _180_OVER_PI = 180.0/M_PI;
46 const double PI_OVER_180 = M_PI/180.0;
51 const double ALMOST_MINUS_1 = -0.9999999999;
55 const double ALMOST_PLUS_1 = 0.9999999999;