PSystem ps;

Particle[] FarLeft = new Particle[14];
Particle[] FarRight = new Particle[14];
Particle[] NearLeft = new Particle[14];
Particle[] NearRight = new Particle[14];
Particle Center;

float sl;
float il;


void setup() {
  size(500,500);
  ps = (PSystem)loadPlugin("PSystem");
  framerate(30);

  Center = new Particle(0, 0,0);
  ps.addParticle(Center);
  Center.fix();

  il = 2*sqrt(10);

  for(int i=0; i<14; ++i) {
    sl = i*20.0;
    FarLeft[i] = new Particle(-i*10-10,0,-i*10+10);
    ps.addParticle(FarLeft[i]);
    FarRight[i] = new Particle(i*10+10,0,-i*10+10);
    ps.addParticle(FarRight[i]);
    NearLeft[i] = new Particle(-i*10-10,0,i*10+10);
    ps.addParticle(NearLeft[i]);
    NearRight[i] = new Particle(i*10+10,0,i*10+10);
    ps.addParticle(NearRight[i]);
  
    ps.defaultSpringRestLength = sl;
    ps.defaultSpringStrength = 2;
    ps.defaultSpringDamping = 1;
    ps.addSpring(FarLeft[i],FarRight[i]);
    ps.addSpring(FarLeft[i],NearLeft[i]);
    ps.addSpring(NearLeft[i],NearRight[i]);
    ps.addSpring(NearRight[i],FarRight[i]); 
  
    ps.defaultSpringRestLength = il;
    if(i>0) {
      ps.addSpring(FarLeft[i],FarLeft[i-1]);
      ps.addSpring(FarRight[i],FarRight[i-1]);
      ps.addSpring(NearLeft[i], NearLeft[i-1]);
      ps.addSpring(NearRight[i],NearRight[i-1]);
      }
    if(i>0) {
      ps.defaultSpringStrength = 2;
      ps.defaultSpringRestLength = sqrt(sq(sl-10)+100);
      ps.addSpring(FarLeft[i],FarRight[i-1]);
      ps.addSpring(FarRight[i],NearRight[i-1]);
      ps.addSpring(NearRight[i], NearLeft[i-1]);
      ps.addSpring(NearLeft[i],FarLeft[i-1]);
      ps.addSpring(FarLeft[i-1],FarRight[i]);
      ps.addSpring(FarRight[i-1],NearRight[i]);
      ps.addSpring(NearRight[i-1], NearLeft[i]);
      ps.addSpring(NearLeft[i-1],FarLeft[i]);
      }
    if(i>1) {
      ps.defaultSpringStrength = .2;
      ps.addSpring(FarLeft[i],FarLeft[i-2]);
      ps.addSpring(FarRight[i],FarRight[i-2]);
      ps.addSpring(NearLeft[i], NearLeft[i-2]);
      ps.addSpring(NearRight[i],NearRight[i-2]);
      }
    }
  ps.defaultSpringRestLength = il;
  ps.addSpring(FarLeft[0],Center);
  ps.addSpring(FarRight[0],Center);
  ps.addSpring(NearLeft[0], Center);
  ps.addSpring(NearRight[0],Center);
  

  ps.setGravity(0.2);
  
  }

void loop() {
  stroke(200,204,50);
  background(40,0,50);
  translate(width/2,height/2);
  rotateX(mouseX*PI/250.0);
  rotateY(mouseY*PI/250.0);
  ps.draw();
}