@Guinness is this correct?
@ -5,7 +5,7 @@
Ball::Ball(const Point& _center, double _min_height, double _v_x, double _v_z,
double _p, double _q) :
Center(_center),
surface(_center, min_height, _p, _q),
surface(_center, _min_height, _p, _q),
init_h(_center.y),
min_height(_min_height),
bounce_number(0.0),