 <!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Flappy Bird</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <canvas id="canvas"></canvas>
    <script src="flappybird.js"></script>
</body>
</html>
// Get the canvas element
var canvas = document.getElementById("canvas");

// Set the canvas dimensions
var width = canvas.width = window.innerWidth;
var height = canvas.height = window.innerHeight;

// Get the canvas context
var ctx = canvas.getContext("2d");

// Set the game variables
var bird = {
  x: width / 2,
  y: height / 2,
  radius: 20,
  speed: 5,
  gravity: 1,
  jump: 20,
  alive: true
};

var pipes = [];
var pipeGap = 150;
var pipeFrequency = 100;
var score = 0;

// Game loop
function gameLoop() {
  // Clear the canvas
  ctx.clearRect(0, 0, width, height);

  // Move and draw the bird
  moveBird();
  drawBird();

  // Move and draw the pipes
  movePipes();
  drawPipes();

  // Check for collisions
  checkCollisions();

  // Update the score
  updateScore();

  // Check if the bird is alive
  if (bird.alive) {
    // Call the game loop again
    requestAnimationFrame(gameLoop);
  } else {
    // Game over
    alert("Game Over");
  }
}

// Move the bird
function moveBird() {
  // Apply gravity
  bird.y += bird.gravity;

  // Jump when spacebar is pressed
  window.addEventListener("keydown", function (event) {
    if (event.keyCode === 32) {
      bird.y -= bird.jump;
    }
  });

  // Check if the bird is offscreen
  if (bird.y > height || bird.y < 0) {
    bird.alive = false;
  }
}

// Draw the bird
function drawBird() {
  ctx.fillStyle = "yellow";
  ctx.beginPath();
  ctx.arc(bird.x, bird.y, bird.radius, 0, Math.PI * 2);
  ctx.closePath();
  ctx.fill();
}

// Move the pipes
function movePipes() {
  // Add a new pipe every pipeFrequency frames
  if (frames % pipeFrequency === 0) {
    var pipe = {
      x: width,
      y: Math.floor(Math.random() * (height - pipeGap)),
      width: 50,
      height: pipeGap
    };
    pipes.push(pipe);
  }

  // Move the pipes to the left
  for (var i = 0; i < pipes.length; i++) {
    pipes[i].x -= bird.speed;
  }

  // Remove the pipes that are offscreen
  if (pipes[0].x + pipes[0].width < 0) {
    pipes.shift();
  }
}

// Draw the pipes
function drawPipes() {
  for (var i = 0; i < pipes.length; i++) {
    ctx.fillStyle = "green";
    ctx.fillRect(pipes[i].x, pipes[i].y, pipes[i].width, pipes[i].height);
    ctx.fillRect(pipes[i].x, pipes[i].y + pipes[i].height + pipeGap, pipes[i].width, height - pipes[i].y - pipes[i].height - pipeGap);
  }
}

// Check for collisions
function checkCollisions() {
  // Check for bird-pipe collisions
  for (var i = 0; i < pipes.length; i++) {
    if (bird.x + bird.radius > pipes[i].x && bird.x - bird.radius < pipes[i].x + pipes[i].width && bird.y + bird.radius > pipes[i].y && bird.y - bird.radius < pipes[i].y + pipes[i].height) {
      bird.alive = false;
    }
    if (bird.x + bird.radius > pipes[i].x && bird.x - bird.radius < pipes[i].x + pipes[i].width && bird.y + bird.radius > pipes[i].y + pipes[i].height + pipeGap && bird.y - bird.radius < height) {
      bird.alive = false;
    }
  }
}

// Update the score
function updateScore() {
  for (var i = 0; i < pipes.length; i++) {
    if (pipes[i].x + pipes[i].width < bird.x && !pipes[i].scored) {
      score++;
      pipes[i].scored = true;
    }
  }
  ctx.fillStyle = "black";
  ctx.font = "30px Arial";
  ctx.fillText("Score: " + score, 10, 50);
}

// Start the game loop
var frames = 0;
gameLoop();

created 2 years ago

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