// Daniel Shiffman

// http://natureofcode.com

​

// Mover object

let particles = [];

let springs = [];

​

​

function setup() {

  createCanvas(700, 360);

  // Create objects at starting position

  // Note third argument in Spring constructor is "rest length"

​

  let offset =width/2;

  let total = width / offset;

​

  let prev = null;

  for (let i = 0; i < total + 1; i++) {

    particles[i] = new Particle( i*offset, height / 2);

    if (prev) {

      let s = new Spring(prev, particles[i], offset*0.1, 6);

      springs.push(s);

    }

    prev = particles[i];

  }

​

  particles[0].lock();

  particles[particles.length - 1].lock();

​

  // Constrain spring distance between min and max

  // spring.constrainLength(bob, 30, 200);

​

}

​

​

function draw() {

​

  background(0);

​

  // Apply a gravity force to the bob

  // var gravity = createVector(0, 2);

  //bob.applyForce(gravity);

  //anchor.applyForce(gravity);

​

  for (let p of particles) {

    p.update();

    if (mouseIsPressed) {

      p.display();

    }

    p.handleDrag(mouseX, mouseY);

  }

​

  for (let s of springs) {

    s.update();

    s.display();

    //s.constrainLength2(1);

  }

​

​

}

​

function mousePressed() {

  for (let p of particles) {

    p.handleClick(mouseX, mouseY);

  }

}

​

function mouseReleased() {

  for (let p of particles) {

    p.stopDragging();

  }

}