added 2DBrickBreaker game

Author: Somil-Shukla

2DBrickBreaker/Somil-Shukla/JavaScript 2D Brick Breaker Game.png

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+# 2D-break-breaker

2DBrickBreaker/Somil-Shukla/README.md

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+//Create variables to reference and store canvas 
+let canvas = document.getElementById('mycanvas');
+let ctx = canvas.getContext('2d');
+let ballRadius = 10;
+let x = canvas.width/2;
+let y = canvas.height - 30;
+let dx = 2;
+let dy = -2;
+//create the paddle
+let paddleHeight = 12;
+let paddleWidth = 72;
+//specify starting point of paddle
+let paddleX = (canvas.width-paddleWidth)/2;
+//holding variables for right and left arrows on keyboard
+let rightPressed=false;
+let leftPressed=false;
+//holding variables for bricks
+let brickRowCount = 4;
+let brickColumnCount = 7;
+let brickWidth = 72;
+let brickHeight = 24;
+let brickPadding = 12;
+let brickOffsetTop = 32;
+let brickOffsetLeft = 32;
+//Create variables to take score
+let score = 0;
+
+//Creating arrays for the bricks
+let bricks = [];
+for (c =0; c<brickColumnCount; c++){
+    bricks[c] = [];
+    for(r=0; r<brickRowCount; r++){
+        //set the x and y position of the bricks
+        bricks[c][r] = { x: 0, y: 0, status: 1};
+    }
+}
+
+document.addEventListener('keydown', keyDownHandler, false);
+document.addEventListener('keyup', keyUpHandler, false);
+document.addEventListener("mousemove", mouseMoveHandler, false);
+
+//Anchor paddle movement to mouse movement
+function mouseMoveHandler(e) {
+    var relativeX = e.clientX - canvas.offsetLeft;
+    if(relativeX > 0 && relativeX < canvas.width) {
+        paddleX = relativeX - paddleWidth/2;
+    }
+}
+
+function keyDownHandler(e){
+    if(e.keyCode === 39){
+        rightPressed = true;
+    }
+    else if (e.keyCode === 37){
+        leftPressed = true;
+    }
+}
+function keyUpHandler(e){
+    if(e.keyCode === 39){
+        rightPressed = false;
+    }
+    else if (e.keyCode === 37){
+        leftPressed = false;
+    }
+}
+
+function drawBall(){
+    ctx.beginPath();
+    ctx.arc(x,y,ballRadius,0,Math.PI*2); //centered at (x,y) position with radius r = ballRadius starting at 0 = startAngle, ending at Math.PI*2 = endAngle (in Radians)
+    ctx.fillStyle = 'red';
+    ctx.fill();
+    ctx.closePath();
+}
+//Create a function to create the paddle
+function drawPaddle(){
+    ctx.beginPath();
+    ctx.rect(paddleX,canvas.height-paddleHeight,paddleWidth,paddleHeight); //centered at (x,y) position with radius r = ballRadius starting at 0 = startAngle, ending at Math.PI*2 = endAngle (in Radians)
+    ctx.fillStyle = 'blue';
+    ctx.fill();
+    ctx.closePath();
+}
+//Create a function to draw the bricks
+function drawBricks(){
+    for(c=0; c < brickColumnCount; c++){
+        for(r=0; r < brickRowCount; r++){
+            if(bricks[c][r].status === 1){
+                let brickX = (c* (brickWidth + brickPadding)) + brickOffsetLeft;
+                let brickY = (r* (brickHeight+brickPadding)) + brickOffsetTop;
+                bricks[c][r].x=brickX;
+                bricks[c][r].y=brickY;
+                ctx.beginPath();
+                ctx.rect(brickX, brickY, brickWidth, brickHeight);
+                ctx.fillStyle = '#6600cc';
+                ctx.fill();
+                ctx.closePath();
+            }
+        }
+    }
+}
+//Create function to keep track of score
+function drawScore(){
+    ctx.font = '18px Arial';
+    ctx.fillStyle = 'brown';
+    ctx.fillText('score: '+ score, 8, 20); //position score at 8,20 on the x,y axis of the canvas
+}
+
+//Collision dections for the bricks
+function collisionDetection(){
+    for(c=0; c<brickColumnCount;c++){
+        for(r=0; r<brickRowCount; r++){
+            let b = bricks[c][r];
+            if(b.status === 1){
+                if(x > b.x && x < b.x + brickWidth && y > b.y && y < b.y + brickHeight){
+                    dy = -dy;
+                    b.status = 0;
+                    score++;
+                    if (score === brickRowCount*brickColumnCount){
+                        alert('Congratulations!! You\'ve won!');
+                        document.location.reload();
+                    }
+                }
+            }
+        }
+    }
+}
+function draw(){
+    //clear each instance of the canvas so a new circle can be drawn
+    ctx.clearRect(0,0,canvas.width, canvas.height);
+    drawScore();
+    drawBricks();
+    drawBall();
+    drawPaddle();
+    collisionDetection();
+    //Calculate collision detections
+    //left and right walls
+    if(x + dx > canvas.width - ballRadius || x + dx < ballRadius) {
+        dx = -dx;
+    }
+    //top walls
+    if(y + dy < ballRadius){
+        dy = -dy;
+    }
+    else if (y + dy > canvas.height-ballRadius){
+        //detect paddle hits
+        if(x > paddleX && x < paddleX + paddleWidth){
+            dy=-dy;
+        }
+        //if no paddle hit, body of canvas is hit ==> game over
+        else {
+            alert('GAME OVER!!');
+            document.location.reload();
+        }
+    }
+    //bottom wall
+    if (y + dy > canvas.height - ballRadius || y + dy < ballRadius){
+        dy = -dy;
+    }
+    //Make paddle move
+    if(rightPressed && paddleX <canvas.width-paddleWidth){
+        paddleX += 7;
+    }
+    else if(leftPressed && paddleX > 0){
+        paddleX -= 7;
+    }
+    //Making the ball move
+    x +=dx; //update x movement every frame
+    y +=dy; //update y movement every frame
+}
+
+//Create an infinite loop that creates the ball
+//paints the ball on the canvas every 10 milliseconds.
+setInterval(draw, 10) 
+
+
+//Notes
+//Using HTML Canvas
+//Understanding HTML Coordinates 
+//Web APIs - https://developer.mozilla.org/en-US/docs/Web/API
+// Drawing shapes with Canvas: https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial
+//MDN BrickerBreaker Tutorial  https://developer.mozilla.org/en-US/docs/Games/Tutorials/2D_Breakout_game_pure_JavaScript
+
+
+

2DBrickBreaker/Somil-Shukla/app.js

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <link rel="stylesheet" href="styles.css">
+    <title>2D Brick Breaker</title>
+</head>
+<body>
+    <canvas id="mycanvas" width="650" height="450">
+        I'm sorry your browser version does not support canvas <!--Fallback Content-->
+    </canvas>
+    <script src="app.js"></script>
+</body>
+</html>

2DBrickBreaker/Somil-Shukla/index.html

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+#mycanvas{
+    background-color: #31f0f0;
+    margin: 125px 0px 125px 295px;
+}
+