Block Breaker's game | AI game creator

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No:44652

75

Block Breaker
Developer User19445｜Date and time 24/2/18 22:42:34
Build time 16.463 sec｜Game capacity 4.828KB｜

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<!DOCTYPE html>
<html>
<head>
    <title>Block Breaker Game</title>
    <style>
        canvas {
            border: 1px solid black;
            display: block;
            margin: 0 auto;
        }
    </style>
</head>
<body>
    <canvas id="gameCanvas" width="480" height="320"></canvas>
    <script>
        const canvas = document.getElementById("gameCanvas");
        const ctx = canvas.getContext("2d");
        
        const paddleWidth = 75;
        const paddleHeight = 10;
        let paddleX = (canvas.width - paddleWidth) / 2;
        
        const ballRadius = 10;
        let x = canvas.width / 2;
        let y = canvas.height - 30;
        let dx = 2;
        let dy = -2;
        
        const brickRowCount = 3;
        const brickColumnCount = 5;
        const brickWidth = 75;
        const brickHeight = 20;
        const brickPadding = 10;
        const brickOffsetTop = 30;
        const brickOffsetLeft = 30;
        
        let bricks = [];
        for(let c = 0; c < brickColumnCount; c++) {
            bricks[c] = [];
            for(let r = 0; r < brickRowCount; r++) {
                bricks[c][r] = { x: 0, y: 0, status: 1 };
            }
        }
        
        document.addEventListener("keydown", keyDownHandler, false);
        document.addEventListener("keyup", keyUpHandler, false);
        
        let rightPressed = false;
        let leftPressed = false;
        
        function keyDownHandler(e) {
            if(e.key === "Right" || e.key === "ArrowRight") {
                rightPressed = true;
            } else if(e.key === "Left" || e.key === "ArrowLeft") {
                leftPressed = true;
            }
        }

function keyUpHandler(e) {
            if(e.key === "Right" || e.key === "ArrowRight") {
                rightPressed = false;
            } else if(e.key === "Left" || e.key === "ArrowLeft") {
                leftPressed = false;
            }
        }
        
        function collisionDetection() {
            for(let c = 0; c < brickColumnCount; c++) {
                for(let r = 0; r < brickRowCount; r++) {
                    let brick = bricks[c][r];
                    if(brick.status === 1) {
                        if(x > brick.x && x < brick.x + brickWidth && y > brick.y && y < brick.y + brickHeight) {
                            dy = -dy;
                            brick.status = 0;
                        }
                    }
                }
            }
        }
        
        function drawBall() {
            ctx.beginPath();
            ctx.arc(x, y, ballRadius, 0, Math.PI * 2);
            ctx.fillStyle = "#0095DD";
            ctx.fill();
            ctx.closePath();
        }
        
        function drawPaddle() {
            ctx.beginPath();
            ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
            ctx.fillStyle = "#0095DD";
            ctx.fill();
            ctx.closePath();
        }
        
        function drawBricks() {
            for(let c = 0; c < brickColumnCount; c++) {
                for(let 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 = "#0095DD";
                        ctx.fill();
                        ctx.closePath();
                    }
                }
            }
        }
        
        function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawBricks();
            drawBall();
            drawPaddle();
            collisionDetection();
            
            if(x + dx > canvas.width - ballRadius || x + dx < ballRadius) {
                dx = -dx;
            }
            if(y + dy < ballRadius) {
                dy = -dy;
            } else if(y + dy > canvas.height - ballRadius) {
                if(x > paddleX && x < paddleX + paddleWidth) {
                    dy = -dy;
                } else {
                    alert("GAME OVER");
                    document.location.reload();
                }
            }
            
            if(rightPressed && paddleX < canvas.width - paddleWidth) {
                paddleX += 7;
            } else if(leftPressed && paddleX > 0) {
                paddleX -= 7;
            }
            
            x += dx;
            y += dy;
            requestAnimationFrame(draw);
        }
        
        draw();
    </script>
</body>
</html>