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<!DOCTYPE html>
<html>
  <head>
    <title>Web VR-AR-XR Tutorial</title><meta name="description" content="Web VR-AR-XR Tutorial">
    <script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
    <script>		
      let gameBlocks = []; 
      let gameBlocksX = []; 
      let gameBlocksY = [];
      let gameBlocksZ = [];
      let gameBlocksActive = [];
      const blockWidth = 0.8;
      const blockHeight = 0.2;
      const blockDepth = 0.2;
      let blockColor = '#4CC3D9';
      let gameIsOn = 0;
      const gameLoopSpeed = 15;
      let topBorder = 3.5;
      let bottomBorder = 0.25;
      let rightBorder = 1.8;
      let leftBorder = -1.8;
      let scoreValue = 0;
      let boxGrabbed;
      let boxHovered;
      let livesValue = 3;
      let gamePaddleX = 0;
      let gamePaddleY = 0.3;
      let gamePaddleZ = -1;
      let gamePaddleWidth = 1;
      let gamePaddleHeight = 0.2;
      let gamePaddleDepth = 0.2;
      let gameBallX = 0;
      let gameBallY = 1.25;
      let gameBallZ = -1;
      let gameBallVelocityX = 0.045;
      let gameBallVelocityY = 0.075;
      const gameBallRadius = 0.15;
      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');

      function stopAllSounds(){
        soundWarp.pause();
        soundImpact.pause();
        soundChime.pause();
        soundWarp.currentTime = 0;
        soundImpact.currentTime = 0;
        soundChime.currentTime = 0;
      }

      function checkBlocks(){
        let returnValue = 1;
        for (i = 0; i < 12; i++){
          if(gameBlocksActive[i] == "1")
            returnValue = 0;
        }
        return returnValue;
      }

      function moveBall(){
          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 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 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');
        if(gameBallY >= topBorder){
          gameBallVelocityY = gameBallVelocityY * -1;
          gameBallY = gameBallY - 0.1;
        }
        if(gameBallY <= bottomBorder){
          gameBallVelocityY = gameBallVelocityY * -1;
          gameBallY = gameBallY + 0.1;
          if(gameIsOn == 1){
            livesValue = livesValue - 1;
            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();
            stopAllSounds();
            soundImpact.play();
            if(livesValue == 0){
              gameIsOn = 0;
              let gameOverText = document.getElementById('gameOverText');
              gameOverText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: red; value: Game Over');
              resetBlocks();
              startGameText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start');
            }
          }
        }
        if(gameBallX >= rightBorder){
          gameBallVelocityX = gameBallVelocityX * -1;
        }
        if(gameBallX <= leftBorder){
          gameBallVelocityX = gameBallVelocityX * -1;
        }
        for (i = 0; i < 12; i++){	
          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;
            gameBlocksActive[i] = "0";
            gameBlocks[i].setAttribute('opacity', '0');
            if(checkBlocks()){
              resetBlocks();
              resetBall();
            }
            if(gameIsOn == 1){
              scoreValue = scoreValue + 1;
              let scoreText = document.getElementById('scoreText');
              scoreText.setAttribute('text', 'font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: blue; value: Score: ' + scoreValue);
              stopAllSounds();
              soundChime.play();
              if(scoreValue == 12){
                gameIsOn = 0;
                let youWinText = document.getElementById('youWinText');
                youWinText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: You Win');
                startGameText.setAttribute('text', 'opacity: 1; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start');
              }
            }
          }
        }
        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(); 
          moveBall();
          gameBall.setAttribute('position', gameBallX + ' ' + gameBallY + ' ' + gameBallZ);
        },
        tick: function (t, dt) {
          this.throttledFunction();
        } 
      });
      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; 
          }
          let intersection = this.raycaster.components.raycaster.getIntersection(this.el);
          if (!intersection) { 
            boxHovered = false;
            updatePaddle();
            return; 
          }
          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; 
            }
            let intersection = this.raycaster.components.raycaster.getIntersection(this.el);
            if (!intersection) { 
              return; 
            }
            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');
              resetBall();
              resetBlocks();
              scoreValue = 0;
              livesValue = 3;
              let scoreText = document.getElementById('scoreText');
              scoreText.setAttribute('text', 'text: Score: ' + scoreValue);	
              let livesText = document.getElementById('livesText');
              livesText.setAttribute('text', 'text: Lives: ' + livesValue);
              let gameOverText = document.getElementById('gameOverText');
              gameOverText.setAttribute('text', 'opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: red; value: Game Over');
              let youWinText = document.getElementById('youWinText');
              youWinText.setAttribute('text', 'opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: You Win');
              startGameText.setAttribute('text', 'opacity: 0; font: mozillavr; width: 5; lineHeight: 50; letterSpacing: 5; color: green; value: Start');
              gameIsOn = 1;
              stopAllSounds();
              soundWarp.play(); 
            };            
          });
          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"); 
          });
        }
      });

      window.onload = function (){
        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";
        }
        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;
        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;
        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;
        let scene = document.getElementById("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>
      <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>
      <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>
      <a-sky src="https://cdn.aframe.io/360-image-gallery-boilerplate/img/city.jpg"></a-sky>-
      <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>
      <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>
      <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>
      <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>
      <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>
      <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>
      <a-box id="gamePaddle" color="#42f4aa" position="0 0.3 -1" depth="0.2" height="0.2" width="1" handle-paddle></a-box>
      <a-sphere id="gameBall" color="#FFFFFF" radius="0.15" position="0 1.25 -1" handle-ball></a-box>
      
    </a-scene>
  </body>
</html>