+Particles::Particles(const Vector& epicenter, int number, Color color_, int size_, float velocity_, int life_time)
+ : color(color_), size(size_), velocity(velocity_)
+{
+ timer.start(life_time);
+
+ // create particles
+ for(int p = 0; p < number; p++)
+ {
+ Particle* particle = new Particle;
+ particle->pos = epicenter;
+ particle->angle = (rand() % 360) * (M_PI / 180); // in radius
+
+ particles.push_back(particle);
+ }
+}
+
+Particles::~Particles()
+{
+ // free particles
+ for(std::vector<Particle*>::iterator i = particles.begin(); i < particles.end(); i++)
+ delete (*i);
+}
+
+void
+Particles::action(float elapsed_time)
+{
+ // update particles
+ for(int p = 0; p < particles.size(); p++)
+ {
+ particles[p]->pos.x += sin(particles[p]->angle) * velocity * elapsed_time;
+ particles[p]->pos.y += cos(particles[p]->angle) * velocity * elapsed_time;
+ }
+
+ if(!timer.check())
+ remove_me();
+}
+
+void
+Particles::draw(DrawingContext& context)
+{
+ // draw particles
+ for(int p = 0; p < particles.size(); p++)
+ {
+ context.draw_filled_rect(particles[p]->pos, Vector(size,size), color, LAYER_OBJECTS+10);
+ }
+}
+