const Vector& initial_velocity, const Vector& acceleration,
int number, Color color, int size, float life_time,
int drawing_layer);
+ Particles(const Vector& epicenter, int min_angle, int max_angle,
+ const float min_initial_velocity, const float max_initial_velocity,
+ const Vector& acceleration, int number, Color color,
+ int size, float life_time, int drawing_layer);
~Particles();
virtual void update(float elapsed_time);