​

let stars = [];

let ship = {};

​

function generateStars(numStars) {

  for (let i = 0; i < numStars; i++) {

    let star = {};

    star.x = random(0, width);

    star.y = random(0, height);

    star.diam = random(1,3);

    stars.push(star);   

  }

}

function displayStars() {

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

    strokeWeight(stars[i].diam);

    point(stars[i].x,stars[i].y);

  }

}

​

function generateShip() {

  ship.pos = createVector(width/2, height/2);

  ship.vel = createVector(0,0);

  ship.rotation = 0;

}

function moveShip() {

  let acc = createVector(0, 0);

  if (keyIsDown(UP_ARROW)) {

    acc = createVector(0, ship.thrust);

    acc.rotate(ship.rotation);

  }

  ship.vel.add(acc);

  ship.pos.add(ship.vel);

}

function turnShip() {

  if (keyIsDown(LEFT_ARROW))

    ship.rotation -= 0.1;

  if (keyIsDown(RIGHT_ARROW))

    ship.rotation += 0.1;

}

function displayShip() {

  push();

  strokeWeight(1);

  stroke(255);

  translate(ship.pos.x,ship.pos.y);

  rotate(ship.rotation);

  beginShape();

  vertex(0,-25);

  vertex(15,15);

  vertex(-15,15);

  endShape();

  pop();

}

​

function setup() {

  createCanvas(500, 500);

  generateStars(100);

  generateShip();

}

​

function draw() {

  background(0);

  stroke(255);

  strokeWeight(3);

  displayStars();

  turnShip();

  moveShip();

  displayShip();

}