PSystem ps;
Arcball arcball;
Surface bone;

Particle p;

class RectParticle extends Particle {
public RectParticle() {}

  void setup() {
    Spring s = ps.addSpring(p, this);
    s.restLength = 50;
    s.strength = 0.1;
  }
  
  void draw() {
    if (fixed()) {
      fill(255, 0, 0);
    }
    else {
      fill(100, 100, 100, 100);
    }
    super.draw();
  }
  
}

void setup() {
  size(500,500);
  arcball = (Arcball)loadPlugin("Arcball");
  ps = (PSystem)loadPlugin("PSystem");
  
  ps.setGravity(0);
  bone = ps.loadSurface("bone.obj");
  bone.scale(10);
  
  p = new RectParticle();
  p.fix();
  ps.addParticle(p);
  Magnet m = ps.addMagnet(p);
  m.strength = -20;
  
  bone.applyParticles("Layer_01", new RectParticle());
  bone.applyParticles("Layer_02", new RectParticle());
  bone.applyParticles("Layer_03", new RectParticle());
  
  bone.addSpringsToOriginalShape("Layer_01");
  bone.addSpringsToOriginalShape("Layer_02");
  bone.addSpringsToOriginalShape("Layer_03");
}


void loop() {
  background(100, 200, 50);
  translate(width/2, height/2);
  arcball.run();
  
  fill(200, 200, 200);
  stroke(100, 100, 100, 100);
  bone.draw();
  ps.draw();
  
  p.setPos(100*sin(p.age/28.0f), 200*sin(p.age/50.0f), 0);
  p.age++;
}