Week 3 Earth_Shattering - OpenProcessing

Earth_Shattering
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ArrayList particles = new ArrayList();
​
void setup() {
  size(500,500);
  background(250);
  stroke(150,150,100);
}
​
void draw() {
  background(250);
  if ((frameCount%10)==0 && mousePressed) {
    PVector newVelocity = new PVector(width/2-mouseX,height/2-mouseY);
    newVelocity.normalize();
    particles.add(new Particle(new PVector(mouseX, mouseY), newVelocity, 10));
  }
  for (int i=0; i < particles.size(); i++) {
    Particle p = (Particle) particles.get(i);
    p.update();
    p.boundary();
    if (p.stopped){
      for (int u = 0; u < particles.size(); u++) {
        Particle p2 = (Particle) particles.get(u);
        p.detectCollision(p2);
        if (PVector.dist(p.location,p2.location) <= p2.s/2)
        line(p.location.x, p.location.y, p2.location.x, p2.location.y);
      }
    }
  }
}
class Particle {
  PVector location;
  PVector velocity;
 
  float s;
 
  boolean stopped = false;
 
  Particle(PVector l, PVector v, float s) {
    location = l;
    velocity = v;
    this.s = s;
  }
 
  void update() {
    location.add(velocity);
    point(location.x, location.y);
  }
 
  void boundary() {
    if (dist(location.x, location.y, width/2, height/2) < 50) {
      velocity = new PVector(0, 0);
      stopped = true;
    }
  }
 
  void detectCollision(Particle p) {
    if (PVector.dist(location, p.location) <= p.s/2) {
      p.velocity = new PVector(0, 0);
      p.stopped = true;
    }
  }
}
​
​