void advance(float);
Track *get_track() const { return track_pos.track; }
unsigned get_entry() const { return track_pos.ep; }
float get_offset() const { return track_pos.offs; }
const Point &get_position() const { return position; }
float get_direction() const { return direction; }
void advance(float);
Track *get_track() const { return track_pos.track; }
unsigned get_entry() const { return track_pos.ep; }
float get_offset() const { return track_pos.offs; }
const Point &get_position() const { return position; }
float get_direction() const { return direction; }