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No:45383

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0>Block Breaker
Developer WinnerWiener1332｜Date and time 24/2/20 14:12:29
Build time 14.481 sec｜Game capacity 4.701KB｜

Script

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<!DOCTYPE html>
<html>
<head>
    <title>Block Breaker</title>
</head>
<body>
    <canvas id="gameCanvas" width="400" height="400"></canvas>
    
    <script>
        let canvas = document.getElementById('gameCanvas');
        let ctx = canvas.getContext('2d');
        
        let paddleWidth = 80;
        let paddleHeight = 10;
        let paddleX = (canvas.width - paddleWidth) / 2;
        let rightPressed = false;
        let leftPressed = false;
        
        let ballRadius = 10;
        let x = canvas.width / 2;
        let y = canvas.height - 30;
        let dx = 2;
        let dy = -2;
        
        let blockRowCount = 3;
        let blockColumnCount = 5;
        let blockWidth = 75;
        let blockHeight = 20;
        let blockPadding = 10;
        let blockOffsetTop = 30;
        let blockOffsetLeft = 30;
        
        let blocks = [];
        for(let c = 0; c < blockColumnCount; c++) {
            blocks[c] = [];
            for(let r = 0; r < blockRowCount; r++) {
                blocks[c][r] = { x: 0, y: 0, status: 1 };
            }
        }
        
        document.addEventListener('keydown', keyDownHandler, false);
        document.addEventListener('keyup', keyUpHandler, 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 < blockColumnCount; c++) {
                for(let r = 0; r < blockRowCount; r++) {
                    let b = blocks[c][r];
                    if(b.status === 1) {
                        if(x > b.x && x < b.x + blockWidth && y > b.y && y < b.y + blockHeight) {
                            dy = -dy;
                            b.status = 0;
                        }
                    }
                }
            }
        }
        
        function drawPaddle() {
            ctx.beginPath();
            ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
            ctx.fillStyle = '#0095DD';
            ctx.fill();
            ctx.closePath();
        }
        
        function drawBall() {
            ctx.beginPath();
            ctx.arc(x, y, ballRadius, 0, Math.PI*2);
            ctx.fillStyle = '#0095DD';
            ctx.fill();
            ctx.closePath();
        }
        
        function drawBlocks() {
            for(let c = 0; c < blockColumnCount; c++) {
                for(let r = 0; r < blockRowCount; r++) {
                    if(blocks[c][r].status === 1) {
                        let blockX = c * (blockWidth + blockPadding) + blockOffsetLeft;
                        let blockY = r * (blockHeight + blockPadding) + blockOffsetTop;
                        blocks[c][r].x = blockX;
                        blocks[c][r].y = blockY;
                        ctx.beginPath();
                        ctx.rect(blockX, blockY, blockWidth, blockHeight);
                        ctx.fillStyle = '#0095DD';
                        ctx.fill();
                        ctx.closePath();
                    }
                }
            }
        }
        
        function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawBlocks();
            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>