俄罗斯方块是一款经典的游戏,使用JavaScript来实现这个游戏可以帮助你理解游戏开发的基本概念,如游戏循环、碰撞检测、图形渲染等。下面是一个简单的俄罗斯方块教程,包括基础概念和相关代码示例。
以下是一个简单的俄罗斯方块实现示例:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Tetris</title>
<style>
canvas {
display: block;
margin: 0 auto;
background: #000;
}
</style>
</head>
<body>
<canvas id="tetris" width="300" height="600"></canvas>
<script>
const canvas = document.getElementById('tetris');
const ctx = canvas.getContext('2d');
const blockSize = 30;
const width = canvas.width / blockSize;
const height = canvas.height / blockSize;
const shapes = [
[[1, 1, 1, 1]],
[[1, 1], [1, 1]],
[[1, 1, 0], [0, 1, 1]],
[[0, 1, 1], [1, 1, 0]],
[[1, 1, 1], [0, 1, 0]],
[[1, 1, 1], [1, 0, 0]],
[[1, 1, 1], [0, 0, 1]]
];
let currentShape = shapes[Math.floor(Math.random() * shapes.length)];
let x = Math.floor(width / 2) - Math.floor(currentShape[0].length / 2);
let y = 0;
function drawShape(shape, x, y) {
shape.forEach((row, i) => {
row.forEach((value, j) => {
if (value) {
ctx.fillStyle = '#fff';
ctx.fillRect((x + j) * blockSize, (y + i) * blockSize, blockSize, blockSize);
}
});
});
}
function clearCanvas() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
}
function update() {
clearCanvas();
drawShape(currentShape, x, y);
}
document.addEventListener('keydown', (event) => {
switch (event.key) {
case 'ArrowLeft':
x -= 1;
break;
case 'ArrowRight':
x += 1;
break;
case 'ArrowDown':
y += 1;
break;
case 'ArrowUp':
// Rotate shape
const rotatedShape = currentShape[0].map((_, index) => currentShape.map(row => row[index]).reverse());
currentShape = rotatedShape;
break;
}
update();
});
setInterval(update, 500);
</script>
</body>
</html>
setInterval
的时间间隔,或者使用requestAnimationFrame
来优化动画效果。通过这个简单的教程,你可以开始构建自己的俄罗斯方块游戏,并逐步优化和完善功能。
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