Adding a spring

A spring is our second type of force (after gravity)

its force is proportional to its stretch

• it has a rest-length
• a strength
• and a damping

Example 4

• adding springs

PSystem ps;

void setup() {
  size(500,500);
  ps = (PSystem)loadPlugin("PSystem");
  
  Particle p1 = new Particle();
  p1.setPos(width / 2 - 10, height/2, 0);
  p1.fix();
  
  Particle p2 = new Particle();
  p2.setPos(width / 2 + 10, height/2, 0);
  
  ps.addParticle(p1);
  ps.addParticle(p2);
  
  ps.addSpring(p1, p2);
  
  ps.setGravity(0.5);

}

void loop() {
  background(#99CCCC);
  ps.draw();
}