// The Nature of Code

// The Coding Train / Daniel Shiffman

// https://youtu.be/i2ROE_mAhU0

// https://thecodingtrain.com/learning/nature-of-code/3.2-angular-motion.html

​

// Rectangle Acceleration: https://editor.p5js.org/codingtrain/sketches/RR9XUN1mf

// Rectangle Grab Exercise: https://editor.p5js.org/codingtrain/sketches/In9e8j6t_

// Gravitational Attraction: https://editor.p5js.org/codingtrain/sketches/Y-yxvkkZk

​

class Mover {

  constructor(x, y, m) {

    this.pos = createVector(x, y);

    this.vel = p5.Vector.random2D();

    this.vel.mult(5);

    this.acc = createVector(0, 0);

    this.mass = m;

    this.r = sqrt(this.mass) * 2;

​

    this.angle = 0;

    this.angleV = 0;

    this.angleA = 0;

  }

​

  applyForce(force) {

    let f = p5.Vector.div(force, this.mass);

    this.acc.add(f);

  }

​

  update() {

    this.vel.add(this.acc);

    this.pos.add(this.vel);

​

    this.angleA = this.acc.y / 50.0;

​

    this.angleV += this.angleA;

    this.angle += this.angleV;

​

    this.acc.set(0, 0);

  }

​

  show() {

    stroke(255);

    strokeWeight(2);

    fill(255, 100);

    push();

    translate(this.pos.x, this.pos.y);

    rotate(this.angle);

    line(0, 0, this.r, 0);

    ellipse(0, 0, this.r * 2);

    pop();

  }

}

​