+void
+SmokeCloud::action(float elapsed_time)
+{
+ position.y -= 120 * elapsed_time;
+
+ if(timer.check())
+ remove_me();
+}
+
+void
+SmokeCloud::draw(DrawingContext& context)
+{
+ img_smoke_cloud->draw(context, position, LAYER_OBJECTS+1);
+}
+
+Particles::Particles(const Vector& epicenter, int min_angle, int max_angle,
+ const Vector& initial_velocity, const Vector& acceleration, int number,
+ Color color_, int size_, float life_time, int drawing_layer_)
+ : accel(acceleration), color(color_), size(size_), drawing_layer(drawing_layer_)
+{
+ if(life_time == 0) {
+ live_forever = true;
+ } else {
+ live_forever = false;
+ timer.start(life_time);
+ }
+
+ // create particles
+ for(int p = 0; p < number; p++)
+ {
+ Particle* particle = new Particle;
+ particle->pos = epicenter;
+
+ float angle = ((rand() % (max_angle-min_angle))+min_angle)
+ * (M_PI / 180); // convert to radius
+ particle->vel.x = /*fabs*/(sin(angle)) * initial_velocity.x;
+// if(angle >= M_PI && angle < M_PI*2)
+// particle->vel.x *= -1; // work around to fix signal
+ particle->vel.y = /*fabs*/(cos(angle)) * initial_velocity.y;
+// if(angle >= M_PI_2 && angle < 3*M_PI_2)
+// particle->vel.y *= -1;
+
+ 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)
+{
+ Vector camera = Sector::current()->camera->get_translation();
+
+ // update particles
+ for(std::vector<Particle*>::iterator i = particles.begin();
+ i != particles.end(); ) {
+ (*i)->pos.x += (*i)->vel.x * elapsed_time;
+ (*i)->pos.y += (*i)->vel.y * elapsed_time;
+
+ (*i)->vel.x += accel.x * elapsed_time;
+ (*i)->vel.y += accel.y * elapsed_time;
+
+ if((*i)->pos.x < camera.x || (*i)->pos.x > screen->w + camera.x ||
+ (*i)->pos.y < camera.y || (*i)->pos.y > screen->h + camera.y) {
+ delete (*i);
+ i = particles.erase(i);
+ } else {
+ ++i;
+ }
+ }
+
+ if((timer.check() && !live_forever) || particles.size() == 0)
+ remove_me();
+}
+
+void
+Particles::draw(DrawingContext& context)
+{
+ // draw particles
+ for(std::vector<Particle*>::iterator i = particles.begin();
+ i != particles.end(); i++) {
+ context.draw_filled_rect((*i)->pos, Vector(size,size), color,drawing_layer);