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No:37243

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Billiards
Developer User17042｜Date and time 24/1/20 21:23:01
Build time 18.996 sec｜Game capacity 5.635KB｜

Script

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Billiards Game</title>
    <style>
      #canvas {
        border: 1px solid black;
      }
    </style>
  </head>
  <body>
    <canvas id="canvas" width="400" height="400"></canvas>
    <script>
      // Get the canvas element
      const canvas = document.getElementById("canvas");
      const ctx = canvas.getContext("2d");
      
      // Define the ball properties
      let ballRadius = 10;
      let ballX = canvas.width / 2;
      let ballY = canvas.height - 30;
      let dx = 2;
      let dy = -2;
      
      // Define the paddle properties
      let paddleHeight = 10;
      let paddleWidth = 75;
      let paddleX = (canvas.width - paddleWidth) / 2;
      let rightPressed = false;
      let leftPressed = false;
      
      // Define the brick properties
      let brickRowCount = 3;
      let brickColumnCount = 5;
      let brickWidth = 75;
      let brickHeight = 20;
      let brickPadding = 10;
      let brickOffsetTop = 30;
      let 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 };
        }
      }
      
      // Track the score and the number of remaining bricks
      let score = 0;
      let lives = 3;
      
      
      // Function to handle the user input for the paddle movement
      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;
        }
      }
      
      document.addEventListener("keydown", keyDownHandler, false);
      document.addEventListener("keyup", keyUpHandler, false);
      
      // Function to detect collision between the ball and the bricks
      function collisionDetection() {
        for (let c = 0; c < brickColumnCount; c++) {
          for (let r = 0; r < brickRowCount; r++) {
            const brick = bricks[c][r];
            if (brick.status === 1) {
              if (
                ballX > brick.x &&
                ballX < brick.x + brickWidth &&
                ballY > brick.y &&
                ballY < brick.y + brickHeight
              ) {
                dy = -dy;
                brick.status = 0;
                score++;
                if (score === brickRowCount * brickColumnCount) {
                  alert("Congratulations! You won!");
                  document.location.reload();
                }
              }
            }
          }
        }
      }
      
      // Function to draw the ball on the canvas
      function drawBall() {
        ctx.beginPath();
        ctx.arc(ballX, ballY, ballRadius, 0, Math.PI * 2);
        ctx.fillStyle = "#0095DD";
        ctx.fill();
        ctx.closePath();
      }
      
      // Function to draw the paddle on the canvas
      function drawPaddle() {
        ctx.beginPath();
        ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
        ctx.fillStyle = "#0095DD";
        ctx.fill();
        ctx.closePath();
      }
      
      // Function to draw the bricks on the canvas
      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 to update the canvas and animate the ball
      function draw() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        drawBricks();
        drawBall();
        drawPaddle();
        collisionDetection();
        
        // Move the paddle
        if (rightPressed && paddleX < canvas.width - paddleWidth) {
          paddleX += 7;
        } else if (leftPressed && paddleX > 0) {
          paddleX -= 7;
        }
        
        // Move the ball
        ballX += dx;
        ballY += dy;
        
        // Bounce the ball off the walls
        if (ballX + dx > canvas.width - ballRadius || ballX + dx < ballRadius) {
          dx = -dx;
        }
        if (ballY + dy < ballRadius) {
          dy = -dy;
        } else if (ballY + dy > canvas.height - ballRadius) {
          if (ballX > paddleX && ballX < paddleX + paddleWidth) {
            dy = -dy;
          } else {
            lives--;
            if (!lives) {
              alert("Game Over! Try again.");
              document.location.reload();
            } else {
              ballX = canvas.width / 2;
              ballY = canvas.height - 30;
              dx = 2;
              dy = -2;
              paddleX = (canvas.width - paddleWidth) / 2;
            }
          }
        }
        
        // Request animation frame to update the canvas
        requestAnimationFrame(draw);
      }
      
      // Start the game
      draw();
      
    </script>
  </body>
</html>