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No:16426

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Billiards
Developer User6924｜Date and time 23/9/18 4:06:43
Build time 46.138 sec｜Game capacity 6.115KB｜

Script

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Click here for free DL of the app version that can save data.

<!DOCTYPE html>
<html>
<head>
<title>Billiards Game</title>
<style>
    #canvas {
        border: 1px solid black;
    }
</style>
</head>
<body>
    <canvas id="canvas" width="400" height="500"></canvas>
    
    <script>
        // Game variables
        var canvas = document.getElementById("canvas");
        var ctx = canvas.getContext("2d");
        var ballRadius = 10;
        var x = canvas.width/2;
        var y = canvas.height-30;
        var dx = 2;
        var dy = -2;

// Paddle variables
        var paddleHeight = 10;
        var paddleWidth = 75;
        var paddleX = (canvas.width-paddleWidth)/2;
        var rightPressed = false;
        var leftPressed = false;

// Brick variables
        var brickRowCount = 5;
        var brickColumnCount = 3;
        var brickWidth = 75;
        var brickHeight = 20;
        var brickPadding = 10;
        var brickOffsetTop = 30;
        var brickOffsetLeft = 30;
        var bricks = [];

for (var c=0; c<brickColumnCount; c++){
            bricks[c] = [];
            for (var r=0; r<brickRowCount; r++){
                bricks[c][r] = { x: 0, y: 0, status: 1 };
            }
        }

// Score variable
        var score = 0;

// Lives variable
        var lives = 3;

// Event listeners
        document.addEventListener("keydown", keyDownHandler, false);
        document.addEventListener("keyup", keyUpHandler, false);
        document.addEventListener("mousemove", mouseMoveHandler, false);

// Functions
        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 drawScore() {
            ctx.font = "16px Arial";
            ctx.fillStyle = "#0095DD";
            ctx.fillText("Score: "+score, 8, 20);
        }

function drawLives() {
            ctx.font = "16px Arial";
            ctx.fillStyle = "#0095DD";
            ctx.fillText("Lives: "+lives, canvas.width-65, 20);
        }

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.kye == "ArrowLeft"){
                leftPressed = false;
            }
        }

function mouseMoveHandler(e) {
            var relativeX = e.clientX - canvas.offsetLeft;
            if (relativeX > 0 && relativeX < canvas.width){
                paddleX = relativeX - paddleWidth/2;
            }
        }

function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawBricks();
            drawBall();
            drawPaddle();
            drawScore();
            drawLives();
            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 {
                    lives--;
                    if(!lives){
                        alert("Game Over");
                        document.location.reload();
                    }
                    else {
                        x = canvas.width/2;
                        y = canvas.height-30;
                        dx = 2;
                        dy = -2;
                        paddleX = (canvas.width-paddleWidth)/2;
                    }
                }
            }

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>