Particle explosion

ArrayList_Particles_with_tails_vectors.pde

Particle.pde

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//Copyright Jonathan Fraser 2011
//Free to use for non-commercial purposes
//Enjoy :)
​
ArrayList plist = new ArrayList();
int MAX = 50;
​
void setup() {
  size(400,400);
  background(100);
}
​
void draw() {
  background(50);
  if(mousePressed && mouseButton == RIGHT) {
    background(50);
    boolean clearall = true;
    while(plist.size() > 0) {
      for(int i = 0; i < plist.size(); i++) {
        plist.remove(i);
      }
    }
  }
​
  for(int i = 0; i < plist.size(); i++) {
    Particle p = (Particle) plist.get(i); 
    //makes p a particle equivalent to ith particle in ArrayList
    p.run();
    p.update();
    p.gravity();
  }
}
​
void mousePressed() {
  for (int i = 0; i < MAX; i ++) {
    plist.add(new Particle(mouseX,mouseY)); // fill ArrayList with particles
​
    if(plist.size() > 5*MAX) {
      plist.remove(0);
    }
  }
}
​
​

Archived Sketch