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<!DOCTYPE html>
<html>
<head>
<title>Breakout WebXR Tutorial</title><meta name="description" content="Breakout WebXR Tutorial">
<!-- Basic A-Frame library -->
<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
<script>
//initialize variables
//arrays to hold the blocks and their positions
let gameBlocks = []; //array of objects
let gameBlocksX = []; //X dimensions of the blocks
let gameBlocksY = []; //Y dimensions of the blocks
let gameBlocksZ = []; //Z dimensions of the blocks
let gameBlocksActive = []; //whether the block is active
const blockWidth = 0.8; //how wide blocks are in the X dimension
const blockHeight = 0.2; //how tall blocks are in the Y dimension
const blockDepth = 0.2; //how deep blocks are in the Z dimension
let blockColor = '#4CC3D9'; //the default color of the blocks (later this was changed to be dynamically generated)
let gameIsOn = 0; //whether the game is active, controls certain functionality
const gameLoopSpeed = 15; //used for regulating the speed of the game
let topBorder = 3.5; //border of game area in the Y dimension
let bottomBorder = 0.25; //border of game area in the Y dimension
let rightBorder = 1.8; //border of game area in the X dimension
let leftBorder = -1.8; //border of game area in the X dimension
let scoreValue = 0; //keeps
let boxGrabbed; // whether or not the user grabbed the box (the user doesn't drag the box in the final version, but I left this in for illustration)
let boxHovered; // whether or not the user is hovering over the box
let livesValue = 3; // how many lives the player has
let gamePaddleX = 0; //where the game paddle is in the X dimension
let gamePaddleY = 0.3; //where the game paddle is in the Y dimension
let gamePaddleZ = -1; //where the game paddle is in the Z dimension
let gamePaddleWidth = 1; //how wide the game paddle is in the X dimension
let gamePaddleHeight = 0.2; //how tall the game paddle is in the Y dimension
let gamePaddleDepth = 0.2; //how deep the game paddle is in the Z dimension
let gameBallX = 0; //the position of the game ball in the X dimension
let gameBallY = 1.25; //the position of the game ball in the Y dimension
let gameBallZ = -1; //the position of the game ball in the Z dimension
let gameBallVelocityX = 0.045; //how fast the game ball is moving in the X dimension
let gameBallVelocityY = 0.075; //how fast the game ball is moving in the Y dimension
const gameBallRadius = 0.15; //how fast the game ball is moving in the Z dimension
//initialize sound
let soundWarp = new Audio('warp-sfx-6897.mp3');
let soundImpact = new Audio('electronic-impact-soft-10019.mp3');
let soundChime = new Audio('chime-sound-7143.mp3');
//stop all of the sounds
function stopAllSounds(){
soundWarp.pause();
soundImpact.pause();
soundChime.pause();
soundWarp.currentTime = 0;
soundImpact.currentTime = 0;
soundChime.currentTime = 0;
}
//function to check if all blocks are broken, return true if so
function checkBlocks(){
let returnValue = 1;
for (i = 0; i < 12; i++){
if(gameBlocksActive[i] == "1")
returnValue = 0;
}
return returnValue;
}
function moveBall(){
//move the game ball
gameBallX = gameBallX + gameBallVelocityX;
gameBallY = gameBallY + gameBallVelocityY;
}
function updatePaddle(){
if(boxGrabbed == true){
gamePaddle.setAttribute('color', "#FFFF00");
} else if(boxHovered == true){
gamePaddle.setAttribute('color', "#FF0000");
} else {
gamePaddle.setAttribute('color', "#0000FF");
}
}
//function to reset the ball position
function resetBall(){
gameBallX = Math.floor(Math.random() * ((rightBorder - 0.5) - (leftBorder + 0.5) + 1)) + (leftBorder + 0.5);
gameBallY = 1.25;
gameBallZ = -1;
gameBallVelocityX = 0.045;
gameBallVelocityY = 0.075;
gameBall.setAttribute('position', gameBallX + ' ' + gameBallY + ' ' + gameBallZ);
}
//function to reset the blocks
function resetBlocks(){
for (i = 0; i < 12; i++)
{
gameBlocksActive[i] = "1";
let blockColor = '#' + parseInt(Math.random() * 0xffffff).toString(16);
gameBlocks[i].setAttribute('color', blockColor);
gameBlocks[i].setAttribute('opacity', '1');
}
}
function checkCollisions(){
let startGameText = document.getElementById('startGameText');
//checking border collisions
if(gameBallY >= topBorder){
gameBallVelocityY = gameBallVelocityY * -1; //make the ball bounce
gameBallY = gameBallY - 0.1; //to help prevent ball getting stuck
}
if(gameBallY <= bottomBorder){
gameBallVelocityY = gameBallVelocityY * -1; //make the ball bounce
gameBallY = gameBallY + 0.1; //to help prevent balls getting stuck
if(gameIsOn == 1){ //if the user is playing
livesValue = livesValue - 1; //remove a life
let livesText = document.getElementById('livesText');
livesText.setAttribute('text', 'font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: blue; value: Lives: ' + livesValue); //update the life text
resetBall(); //reset the ball's location so it doesn't get stuck
stopAllSounds();
soundImpact.play(); //play sound
if(livesValue == 0){ //if the player runs out of lives
//turn the game off
gameIsOn = 0;
//display the Game Over text by setting the opacity to 1
let gameOverText = document.getElementById('gameOverText');
gameOverText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: red; value: Game Over');
//reset the blocks
resetBlocks();
//display the Start text by changing the opacity to 1
startGameText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start');
}
}
}
if(gameBallX >= rightBorder){
gameBallVelocityX = gameBallVelocityX * -1; //make the ball bounce
}
if(gameBallX <= leftBorder){
gameBallVelocityX = gameBallVelocityX * -1; //make the ball bounce
}
//checking block collisions
//for each block
for (i = 0; i < 12; i++){
//block collisions
if((((gameBallY + (gameBallRadius * .8)) >= (gameBlocksY[i] - blockHeight)) && ((gameBallY - (gameBallRadius * .8)) <= gameBlocksY[i])) && ((gameBallX + (gameBallRadius * .8)) >= (gameBlocksX[i])) && ((gameBallX - (gameBallRadius * .8)) <= (gameBlocksX[i] + blockWidth)) && (gameBlocksActive[i] == "1")){
gameBallVelocityY = gameBallVelocityY * -1; //make the ball bounce
gameBlocksActive[i] = "0"; //mark the block as broken
gameBlocks[i].setAttribute('opacity', '0'); //hide the block
if(checkBlocks()){ //if all of the blocks are broken
resetBlocks(); //reset the blocks
resetBall(); //reset the ball position
}
if(gameIsOn == 1){
scoreValue = scoreValue + 1; //increase the player's score
let scoreText = document.getElementById('scoreText');
scoreText.setAttribute('text', 'font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: blue; value: Score: ' + scoreValue); //update the score text
stopAllSounds();
soundChime.play(); //play sound
if(scoreValue == 12){ //if the player broke all of the blocks
gameIsOn = 0; //turn off the game
//display the You Win text by changing the opacity to 1
let youWinText = document.getElementById('youWinText');
youWinText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: You Win');
//display the Start text by changing the opacity to 1
startGameText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start');
}
}
}
}
//checking paddle collisions
if( ((gameBallY + (gameBallRadius * .8)) >= (gamePaddleY - gamePaddleHeight)) && ((gameBallY - (gameBallRadius * .8)) <= (gamePaddleY) && ((gameBallX + (gameBallRadius * .8)) >= (gamePaddleX - gamePaddleWidth * .5)) && ((gameBallX - (gameBallRadius * .8)) <= (gamePaddleX + gamePaddleWidth *.5)))){
gameBallVelocityY = gameBallVelocityY * -1; //make the ball bounce
}
}
AFRAME.registerComponent('handle-ball', {
init: function () {
this.throttledFunction = AFRAME.utils.throttle(this.gameLoop, gameLoopSpeed, this);
},
gameLoop: function () {
checkCollisions(); //check to see if anything collided
moveBall(); //update the X and Y coordinates of game objects
gameBall.setAttribute('position', gameBallX + ' ' + gameBallY + ' ' + gameBallZ); //reposition the ball
},
tick: function (t, dt) {
this.throttledFunction(); // Called every frame.
}
});
AFRAME.registerComponent('handle-paddle', {
init: function () {
let el = this.el;
el.addEventListener('mousedown', function (evt) {
boxGrabbed = true;
});
el.addEventListener('mouseup', function (evt) {
boxGrabbed = false;
});
el.addEventListener('raycaster-intersected', evt => {
this.raycaster = evt.detail.el;
});
this.el.addEventListener('raycaster-intersected-cleared', evt => {
this.raycaster = null;
});
},
tick: function () {
if (!this.raycaster) {
boxHovered = false;
updatePaddle();
return;
}// Not intersecting.
let intersection = this.raycaster.components.raycaster.getIntersection(this.el);
if (!intersection) {
boxHovered = false;
updatePaddle();
return;
} // Not intersecting
// intersecting
boxHovered = true;
updatePaddle();
}
});
AFRAME.registerComponent('cursor-listener', {
init: function () {
this.el.addEventListener('raycaster-intersected', evt => {
this.raycaster = evt.detail.el;
});
this.el.addEventListener('raycaster-intersected-cleared', evt => {
this.raycaster = null;
});
},
tick: function () {
if (!this.raycaster) {
return;
}// Not intersecting.
let intersection = this.raycaster.components.raycaster.getIntersection(this.el);
if (!intersection) {
return;
} // Not intersecting
// intersecting
// move box if the game is running
if(gameIsOn == 1){
let gamePaddle = document.getElementById('gamePaddle');
let tempY = gamePaddle.components.position.data.y;
let tempZ = gamePaddle.components.position.data.z;
let tempX = intersection.point.x;
if(tempX < leftBorder){
tempX = leftBorder + (gamePaddleWidth/2);
}
if(tempX > rightBorder){
tempX = rightBorder - (gamePaddleWidth/2);
}
gamePaddleX = tempX;
gamePaddle.setAttribute('position', gamePaddleX + ' ' + tempY + ' ' + tempZ);
}
}
});
AFRAME.registerComponent('handle-start', {
init: function () {
let el = this.el;
let startGameText = document.getElementById('startGameText');
el.addEventListener('mousedown', function (evt) {
if(gameIsOn == 0){
startGameText.setAttribute('text', 'opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start');
//reset all game components
resetBall();
resetBlocks();
//reset the score
scoreValue = 0;
livesValue = 3;
//update the text
let scoreText = document.getElementById('scoreText');
scoreText.setAttribute('text', 'text: Score: ' + scoreValue);
let livesText = document.getElementById('livesText');
livesText.setAttribute('text', 'text: Lives: ' + livesValue);
//hide the Game Over text by setting the opacity to zero
let gameOverText = document.getElementById('gameOverText');
gameOverText.setAttribute('text', 'opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: red; value: Game Over');
//hide the You Win text by setting the opacity to zero
let youWinText = document.getElementById('youWinText');
youWinText.setAttribute('text', 'opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: You Win');
//hide the Start Game text by setting the opacity to zero
startGameText.setAttribute('text', 'opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start');
//set the game on flag
gameIsOn = 1;
stopAllSounds();
soundWarp.play(); //play sound
};
});
el.addEventListener('raycaster-intersected', evt => {
startGameText.setAttribute('text', "font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: #FF0000; value: Start;");
});
this.el.addEventListener('raycaster-intersected-cleared', evt => {
startGameText.setAttribute('text', "font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start");
});
}
});
//wait until the page loads to perform the following
window.onload = function (){
//create the game blocks
//declare the blocks and their attributes
for (i = 0; i < 12; i++)
{
gameBlocks[i] = document.createElement('a-box');
gameBlocks[i].setAttribute('width', blockWidth);
gameBlocks[i].setAttribute('height', blockHeight);
gameBlocks[i].setAttribute('depth', blockDepth);
blockColor = '#' + parseInt(Math.random() * 0xffffff).toString(16);
gameBlocks[i].setAttribute('color', blockColor);
gameBlocksActive[i] = "1";
}
//set the position of the blocks
//Top row
gameBlocksX[0] = -1.5;
gameBlocksY[0] = 3.5;
gameBlocksZ[0] = -1;
gameBlocksX[1] = -0.5;
gameBlocksY[1] = 3.5;
gameBlocksZ[1] = -1;
gameBlocksX[2] = 0.5
gameBlocksY[2] = 3.5;
gameBlocksZ[2] = -1;
gameBlocksX[3] = 1.5;
gameBlocksY[3] = 3.5;
gameBlocksZ[3] = -1;
//Middle row
gameBlocksX[4] = -1.5;
gameBlocksY[4] = 3;
gameBlocksZ[4] = -1;
gameBlocksX[5] = -0.5;
gameBlocksY[5] = 3;
gameBlocksZ[5] = -1;
gameBlocksX[6] = 0.5
gameBlocksY[6] = 3;
gameBlocksZ[6] = -1;
gameBlocksX[7] = 1.5;
gameBlocksY[7] = 3;
gameBlocksZ[7] = -1;
//Bottom row
gameBlocksX[8] = -1.5;
gameBlocksY[8] = 2.5;
gameBlocksZ[8] = -1;
gameBlocksX[9] = -0.5;
gameBlocksY[9] = 2.5;
gameBlocksZ[9] = -1;
gameBlocksX[10] = 0.5
gameBlocksY[10] = 2.5;
gameBlocksZ[10] = -1;
gameBlocksX[11] = 1.5;
gameBlocksY[11] = 2.5;
gameBlocksZ[11] = -1;
//add the blocks to the scene
let scene = document.getElementById("scene"); //assign a name to the A-Frame scene
for (i = 0; i < 12; i++)
{
scene.appendChild(gameBlocks[i]);
gameBlocks[i].setAttribute('position', gameBlocksX[i] + ' ' + gameBlocksY[i] + ' ' + gameBlocksZ[i]);
}
}
</script>
</head>
<body>
<a-scene id="scene">
<a-assets>
<a-mixin id="red" material="color: red"></a-mixin>
<a-mixin id="green" material="color: green"></a-mixin>
<a-mixin id="blue" material="color: blue"></a-mixin>
<a-mixin id="url-red" material="color: #d63959"></a-mixin>
<a-mixin id="cube" geometry="primitive: box"></a-mixin>
</a-assets>
<!-- set game background planes. -->
<a-plane position="0 0 -3" rotation="-90 0 0" width="4" height="8" color="#a0a0a0"></a-plane>
<a-plane position="0 2 -5" rotation="0 0 0" width="4" height="4" color="#bfabce"></a-plane>
<!-- set a plane to track where the user is pointing -->
<a-plane id="moveTracker" color="#FFFFFF" rotation="0 0 0" position="0 0 -1.6" opacity="0" width="20" height="20" cursor-listener></a-plane>
<!-- sky color. -->
<a-sky src="https://cdn.aframe.io/360-image-gallery-boilerplate/img/city.jpg"></a-sky>-
<!-- Set camera and controller starting position. -->
<a-entity position="0 0 3.8">
<a-camera look-controls wasd-controls="enabled: false"></a-camera>
<a-entity laser-controls="hand: right"></a-entity>
</a-entity>
<!-- Start Game text -->
<a-entity id="startGameText" text="font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start" position="2.2 2 0.5" rotation="0 0 0" handle-start></a-entity>
<!-- Game Over text -->
<a-entity id="gameOverText" text="opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: red; value: Game Over" position="1.9 2.5 0.5" rotation="0 0 0"></a-entity>
<!-- You Win text -->
<a-entity id="youWinText" text="opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: You Win" position="2 2.5 0.5" rotation="0 0 0"></a-entity>
<!-- Player Lives text -->
<a-entity id="livesText" text="font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: blue; value: Lives: 3" position="4 3.8 -0.8" rotation="0 0 0"></a-entity>
<!-- Score text -->
<a-entity id="scoreText" text="font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: blue; value: Score: 0" position="0 3.8 -0.8" rotation="0 0 0"></a-entity>
<!-- Add the game paddle -->
<a-box id="gamePaddle" color="#42f4aa" position="0 0.3 -1" depth="0.2" height="0.2" width="1" handle-paddle></a-box>
<!-- Add the game ball -->
<a-sphere id="gameBall" color="#FFFFFF" radius="0.15" position="0 1.25 -1" handle-ball></a-box>
</a-scene>
</body>
</html> |