+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()