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jeffThompsonjeffThompson
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Games!
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‎Week10-YouVoteWeLearn/Code/Asteroids/bullet.js‎

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class Bullet {
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constructor(ship) {
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// set the bullet's position to the ship
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// (we have to use copy() otherwise the
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// ship will move with the bullet!)
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this.position = ship.position.copy();
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// fancy math!
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// this calculates the amount we need to move
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// the bullet in x/y to travel at a particular angle
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// we give it the ship's angle, then multiply by
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// 5 (or any other number) to give it a speed
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this.speed = createVector(
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cos(ship.angle) * 5,
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sin(ship.angle) * 5
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);
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}
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update() {
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this.position.add(this.speed);
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}
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display() {
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fill(255, 150, 0);
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noStroke();
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circle(this.position.x, this.position.y, 8);
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}
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}
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‎Week10-YouVoteWeLearn/Code/Asteroids/enemy.js‎

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class Enemy {
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constructor() {
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this.position = createVector(
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random(50, width-50),
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random(50, height-50)
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);
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this.dia = int(random(10, 30));
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this.angle = random(0, TWO_PI);
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this.rotationSpeed = radians(random(-2,2));
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// keep track of whether this enemy has been
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// hit or not
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this.isHit = false;
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}
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update() {
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// spin around!
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this.angle += this.rotationSpeed;
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// check if hit by a bullet
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for (let i=0; i<bullets.length; i++) {
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// vectors give us a really easy way to calculate distance!
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let d = this.position.dist(bullets[i].position);
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// if the distance is less than the enemy's diameter,
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// it's a hit! (and return immediately to avoid any
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// unecessary looping))
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if (d < this.dia/2) {
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this.isHit = true;
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return;
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}
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}
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}
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display() {
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push();
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translate(this.position.x, this.position.y);
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rotate(this.angle);
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fill(0,150,255);
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noStroke();
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rectMode(CENTER);
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square(0,0, this.dia);
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pop();
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}
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}
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‎Week10-YouVoteWeLearn/Code/Asteroids/index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Sketch</title>
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<link rel="stylesheet" type="text/css" href="style.css">
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<script src="libraries/p5.min.js"></script>
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</head>
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<body>
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<script src="enemy.js"></script>
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<script src="bullet.js"></script>
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<script src="ship.js"></script>
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<script src="sketch.js"></script>
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</body>
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</html>

‎Week10-YouVoteWeLearn/Code/Asteroids/jsconfig.json‎

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{
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"compilerOptions": {
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"target": "es6"
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},
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"include": [
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"*.js",
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"**/*.js",
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"/Users/jeffthompson/.vscode/extensions/samplavigne.p5-vscode-1.2.13/p5types/global.d.ts"
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]
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}

‎Week10-YouVoteWeLearn/Code/Asteroids/libraries/p5.min.js‎

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‎Week10-YouVoteWeLearn/Code/Asteroids/libraries/p5.sound.min.js‎

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‎Week10-YouVoteWeLearn/Code/Asteroids/ship.js‎

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class Ship {
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constructor() {
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this.speed = 3;
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this.angleIncrement = radians(3);
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this.position = createVector(width/2, height/2);
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this.angle = 0;
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}
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update(direction) {
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// MOVE for forward!
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// (kind of a hack, MOVE is a keyword usually
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// used to set the mouse cursor!)
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if (direction === MOVE) {
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this.position.x += cos(this.angle) * this.speed;
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this.position.y += sin(this.angle) * this.speed;
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if (this.position.x < 0) this.position.x = width;
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else if (this.position.x > width) this.position.x = 0;
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if (this.position.y < 0) this.position.y = height;
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else if (this.position.y > height) this.position.y = 0;
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}
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// RIGHT for clockwise, LEFT for counter-clockwise
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else if (direction === RIGHT) {
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this.angle += this.angleIncrement;
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}
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else if (direction === LEFT) {
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this.angle -= this.angleIncrement;
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}
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}
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display() {
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push();
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translate(this.position.x, this.position.y);
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rotate(this.angle);
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fill(0);
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noStroke();
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triangle(
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-10, -10,
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10, 0,
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-10, 10
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);
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pop();
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}
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}
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‎Week10-YouVoteWeLearn/Code/Asteroids/sketch.js‎

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/*
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ASTEROIDS
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Jeff Thompson | 2013 | jeffreythompson.org
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https://freeasteroids.org
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See the other Javascript files for more details!
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CHALLENGES
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1. Can you draw a more interesting shape for our
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asteroids? (Hint: try using randomized vertices,
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created in the constructor))
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2. Can you make the asteroids move across the
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screen? Can you remove them if they go offscreen?
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3. Could you limit the number of bullets available?
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*/
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let ship;
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let bullets;
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let enemies;
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let score = 0;
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function setup() {
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createCanvas(windowWidth, windowHeight);
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noCursor();
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// create our ship in the center
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ship = new Ship();
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// and an empty list of bullets
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bullets = [];
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// make a few enemies too
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enemies = [];
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for (let i=0; i<3; i++) {
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let e = new Enemy();
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enemies.push(e);
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}
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}
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function draw() {
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background(220);
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fill(0);
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noStroke();
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text('SCORE: ' + score, 15,20);
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// use left/right to rotate the ship,
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// up to move forward
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// note: keyIsDown() lets us check for
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// multiple key presses at once!
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if (keyIsDown(UP_ARROW)) {
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ship.update(MOVE);
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}
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if (keyIsDown(LEFT_ARROW)) {
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ship.update(LEFT);
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}
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if (keyIsDown(RIGHT_ARROW)) {
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ship.update(RIGHT);
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}
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if (keyIsDown(32)) { // 32 = space in ASCII
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let b = new Bullet(ship);
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bullets.push(b);
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}
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ship.display();
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// update and draw the bullets
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for (let i=0; i<bullets.length; i++) {
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bullets[i].update();
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bullets[i].display();
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}
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// and finally go through the enemies!
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// note we do this in reverse order; this is
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// so we can remove one that is hit (trying
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// this in normal order would cause an error,
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// since the length of the list would change!)
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for (let i=enemies.length-1; i>=0; i-=1) {
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enemies[i].update();
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// the isHit variable will be set to true
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// in the update() function if it hits an enemy
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if (enemies[i].isHit) {
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// remove the current enemy from the list!
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// (and update the score)
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enemies.splice(i, 1);
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score += 1;
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}
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// if not hit, display as usual
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else {
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enemies[i].display();
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}
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}
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// randomly generate some new enemies
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// (or when we've destroyed them all!)
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if (random(0, 100) < 0.5 || enemies.length === 0) {
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enemies.push(new Enemy());
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}
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}
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‎Week10-YouVoteWeLearn/Code/Asteroids/style.css‎

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html, body {
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margin: 0;
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padding: 0;
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}
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canvas {
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display: block;
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}

‎Week10-YouVoteWeLearn/Code/Pong-MultiBall/ball.js‎

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class Ball {
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constructor() {
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this.dia = 20;
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this.respawn();
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}
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update() {
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this.position.add(this.speed);
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// collision with paddle, reverse!
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let hit = this.checkCollision(paddle);
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if (hit) {
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this.speed.x *= -1;
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score += 1;
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}
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// past left edge, respawn!
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// (and reduce score by 1)
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if (this.position.x < 0) {
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this.respawn();
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score -= 1;
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}
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// bounce off left edge
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if (this.position.x > width - this.dia/2) {
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this.speed.x *= -1;
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}
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// bounce off top/bottom too
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if (this.position.y < this.dia/2 || this.position.y > height - this.dia/2) {
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this.speed.y *= -1;
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}
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}
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display() {
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fill(0);
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noStroke();
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circle(this.position.x, this.position.y, this.dia);
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}
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respawn() {
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this.position = createVector(width-this.dia*2, height/2);
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this.speed = createVector(
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random(-2, -5),
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random(-5, 5)
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);
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}
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checkCollision(p) {
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if (this.position.x - this.dia/2 < p.x + p.w/2 &&
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this.position.y > p.y - p.h/2 &&
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this.position.y < p.y + p.h/2 &&
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this.speed.x < 0) {
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return true;
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}
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return false;
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}
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}
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