// Chapter 1 : Vectors

​

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(0);

  let pos = createVector(width / 2, height / 2);

  let mouse = createVector(mouseX, mouseY);

  let v = p5.Vector.sub(mouse, pos);

  // let m = v.mag();

  // v.div(m);

  // v.mult(50);

​

  // v.normalize();

  // v.mult(50);

​

  // v.normalize().mult(50);

​

  v.setMag(50);

​

  stroke(255);

  strokeWeight(2);

  translate(width / 2, height / 2);

  line(0, 0, v.x, v.y);

}