let { Vec2D, Rect } = toxi.geom;

let { GravityBehavior } = toxi.physics2d.behaviors;

let { AttractionBehavior } = toxi.physics2d.behaviors;

​

let particles = [];

let springs = [];

let particles2 = [];

let springs2 = [];

let physics;

let dir;

​

let flail;

let cluster;

let bball;

let tennis;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(100);

  //make a world

  physics = new VerletPhysics2D();

  let gravity = new GravityBehavior(new Vec2D(0, 0.1));

  physics.addBehavior(gravity);

  let boundry = new Rect(0, 0, width, height);

  physics.setWorldBounds(boundry);

  angleMode(RADIANS);

​

  //make a particle

  let y = height/4;

  let x = 200;

  let strength = 1;

​

  flail = new Flail(x, y, 20, 300);

​

  //createBallChain(particles, springs, 1, bball, x, y, "b");

 // createBallChain(particles2, springs2, strength, tennis, x, y, 2);

​

 //create basketball chain

  for (i = 0; i < 13; i++) {

    particles[i] = new Particle(x, y, 2);

    y += 20;

  }

​

​

  for (i = 0; i < particles.length - 1; i++) {

    springs[i] = new Spring(particles[i], particles[i + 1], 20, strength);

  }

​

  let bx = particles[particles.length - 1].x;

  let by = particles[particles.length - 1].y;

​

  bball = new Ball(bx, by, 70, "b");

​

 //create tennis ball chain

  for (i = 0; i < 15; i++) {

    particles2[i] = new Particle(x, y, 2);

    y += 20;

  }

​

  for (i = 0; i < particles2.length - 1; i++) {

    springs2[i] = new Spring(particles2[i], particles2[i + 1], 20, strength);

  }

​

  tennis = new Ball(bx, by, 30, "t");

​

}

​

function draw() {

   background(100);

​

  physics.update();

​

  flail.show();

  flail.swing();

​

​

  attachBallChain(particles, springs, bball);

  attachBallChain(particles2, springs2, tennis);

​

​

  // cluster.show();

}

​

function createBallChain(particles, springs, strength, ball, x, y, type){

  for (i = 0; i < 15; i++) {

    particles[i] = new Particle(x, y, 2);

    y += 20;

  }

​

  for (i = 0; i < particles.length - 1; i++) {

    springs[i] = new Spring(particles[i], particles[i + 1], 20, strength);

  }

​

  let bx = particles[particles.length - 1].x;

  let by = particles[particles.length - 1].y;

​

  ball = new Ball(bx, by, 70, type);

​

}

​

​

​

function attachBallChain(particles, springs, ball) {

  //particles[0].lock();

  particles[0].x = flail.x + flail.w / 2;

  particles[0].y = flail.y - flail.l * 0.04;

  particles[0].lock();

​

  for (let i = 0; i < springs.length; i++) {

    springs[i].show();

  }

​

  if (ball.t == "b") {

    ball.showB();

  } else if (ball.t == "t") {

    ball.showT();

  }

​

  ball.update(particles[particles.length - 1]);

}

​