"use strict";

class Ball{
    constructor() {
    this.pos = createVector();
    this.vel = createVector();
    this.acc = createVector();

    this.mass = 4;
    this.rad = this.mass * 2;
    this.r = random(255);
    this.b = random(255);
    this.g = random(255);
    this.a = 80;
  }

  position(x, y) {
    this.pos = createVector(x, y);
    return this;
  }

  velocity(x, y) {
    this.vel = createVector(x, y);
    return this;
  }

  colour(r, g, b, a) {
    this.r = r;
    this.b = b;
    this.g = g;
    this.a = a;
    return this;
  }

  move() {
    this.pos.x += random(-0.5, 0.5);
  }


  update(){
    this.vel.add(this.acc);
    this.pos.add(this.vel);
    this.acc.mult(0);

  }

  display() {
    push();
    translate(this.pos.x, this.pos.y);
    fill(this.r, this.b, this.g, this.a);
    ellipse(0, 0, this.rad *2, this.rad * 2);
    pop();
  }

  applyForce(f) {
    //f.div(this.mass);
    this.acc.add(f);
  }


}