Update index.html
Browse files- index.html +399 -18
index.html
CHANGED
|
@@ -1,19 +1,400 @@
|
|
| 1 |
-
<!
|
| 2 |
-
<html>
|
| 3 |
-
|
| 4 |
-
|
| 5 |
-
|
| 6 |
-
|
| 7 |
-
|
| 8 |
-
|
| 9 |
-
|
| 10 |
-
|
| 11 |
-
|
| 12 |
-
|
| 13 |
-
|
| 14 |
-
|
| 15 |
-
|
| 16 |
-
|
| 17 |
-
|
| 18 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 19 |
</html>
|
|
|
|
| 1 |
+
<!DOCTYPE html>
|
| 2 |
+
<html lang="zh">
|
| 3 |
+
<head>
|
| 4 |
+
<meta charset="UTF-8">
|
| 5 |
+
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
| 6 |
+
<title>贪吃蛇(对齐时无法转向)</title>
|
| 7 |
+
<link href="https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap" rel="stylesheet">
|
| 8 |
+
<script src="https://cdn.tailwindcss.com"></script>
|
| 9 |
+
<style>
|
| 10 |
+
body {
|
| 11 |
+
font-family: 'Press Start 2P', cursive;
|
| 12 |
+
display: flex;
|
| 13 |
+
justify-content: center;
|
| 14 |
+
align-items: center;
|
| 15 |
+
min-height: 100vh;
|
| 16 |
+
background-color: #1a1a1a; /* 深色背景 */
|
| 17 |
+
color: #ffffff;
|
| 18 |
+
flex-direction: column; /* 垂直排列 */
|
| 19 |
+
padding: 20px;
|
| 20 |
+
box-sizing: border-box;
|
| 21 |
+
}
|
| 22 |
+
#gameCanvas {
|
| 23 |
+
background-color: #000000; /* 黑色画布 */
|
| 24 |
+
border: 5px solid #33ff33; /* 亮绿色边框 */
|
| 25 |
+
display: block; /* 移除默认的内联间距 */
|
| 26 |
+
max-width: 100%; /* 确保画布在小屏幕上不会溢出 */
|
| 27 |
+
height: auto; /* 保持宽高比 */
|
| 28 |
+
aspect-ratio: 1 / 1; /* 使画布保持正方形 */
|
| 29 |
+
image-rendering: pixelated; /* 像素化渲染,保持复古风格 */
|
| 30 |
+
box-shadow: 0 0 20px #33ff33; /* 添加辉光效果 */
|
| 31 |
+
margin-bottom: 20px; /* 画布下方间距 */
|
| 32 |
+
}
|
| 33 |
+
.game-controls {
|
| 34 |
+
text-align: center;
|
| 35 |
+
margin-top: 15px;
|
| 36 |
+
}
|
| 37 |
+
.game-button {
|
| 38 |
+
font-family: 'Press Start 2P', cursive;
|
| 39 |
+
background-color: #33ff33; /* 亮绿色 */
|
| 40 |
+
color: #000000; /* 黑色文字 */
|
| 41 |
+
border: 2px solid #000000;
|
| 42 |
+
padding: 10px 20px;
|
| 43 |
+
margin: 5px;
|
| 44 |
+
cursor: pointer;
|
| 45 |
+
text-transform: uppercase;
|
| 46 |
+
transition: background-color 0.3s, transform 0.1s;
|
| 47 |
+
box-shadow: 3px 3px 0 #118811; /* 添加阴影 */
|
| 48 |
+
}
|
| 49 |
+
.game-button:hover {
|
| 50 |
+
background-color: #11cc11; /* 深一点的绿色 */
|
| 51 |
+
}
|
| 52 |
+
.game-button:active {
|
| 53 |
+
transform: translate(2px, 2px);
|
| 54 |
+
box-shadow: 1px 1px 0 #118811;
|
| 55 |
+
}
|
| 56 |
+
#messageBox {
|
| 57 |
+
position: absolute;
|
| 58 |
+
top: 50%;
|
| 59 |
+
left: 50%;
|
| 60 |
+
transform: translate(-50%, -50%);
|
| 61 |
+
background-color: rgba(0, 0, 0, 0.8);
|
| 62 |
+
color: #ff3333; /* 红色消息 */
|
| 63 |
+
padding: 30px;
|
| 64 |
+
border: 3px solid #ff3333;
|
| 65 |
+
border-radius: 10px; /* 圆角 */
|
| 66 |
+
display: none; /* 默认隐藏 */
|
| 67 |
+
text-align: center;
|
| 68 |
+
z-index: 10;
|
| 69 |
+
box-shadow: 0 0 15px #ff3333;
|
| 70 |
+
}
|
| 71 |
+
#messageText {
|
| 72 |
+
margin-bottom: 15px;
|
| 73 |
+
}
|
| 74 |
+
/* 响应式设计:小屏幕 */
|
| 75 |
+
@media (max-width: 600px) {
|
| 76 |
+
body {
|
| 77 |
+
padding: 10px;
|
| 78 |
+
}
|
| 79 |
+
#gameCanvas {
|
| 80 |
+
margin-bottom: 15px;
|
| 81 |
+
}
|
| 82 |
+
.game-button {
|
| 83 |
+
padding: 8px 15px;
|
| 84 |
+
font-size: 0.8em;
|
| 85 |
+
}
|
| 86 |
+
#messageBox {
|
| 87 |
+
padding: 20px;
|
| 88 |
+
font-size: 0.9em;
|
| 89 |
+
}
|
| 90 |
+
}
|
| 91 |
+
</style>
|
| 92 |
+
</head>
|
| 93 |
+
<body>
|
| 94 |
+
|
| 95 |
+
<h1 class="text-2xl mb-4 text-center">贪吃蛇</h1>
|
| 96 |
+
<div id="score" class="text-lg mb-2">分数: 0</div>
|
| 97 |
+
|
| 98 |
+
<canvas id="gameCanvas"></canvas>
|
| 99 |
+
|
| 100 |
+
<div class="game-controls">
|
| 101 |
+
<button id="resetButton" class="game-button">重新开始</button>
|
| 102 |
+
</div>
|
| 103 |
+
|
| 104 |
+
<div id="messageBox">
|
| 105 |
+
<div id="messageText">游戏结束!</div>
|
| 106 |
+
<button id="closeMessageButton" class="game-button" style="background-color: #ff3333; color: #000;">关闭</button>
|
| 107 |
+
</div>
|
| 108 |
+
|
| 109 |
+
<script>
|
| 110 |
+
const canvas = document.getElementById('gameCanvas');
|
| 111 |
+
const ctx = canvas.getContext('2d');
|
| 112 |
+
const scoreElement = document.getElementById('score');
|
| 113 |
+
const resetButton = document.getElementById('resetButton');
|
| 114 |
+
const messageBox = document.getElementById('messageBox');
|
| 115 |
+
const messageText = document.getElementById('messageText');
|
| 116 |
+
const closeMessageButton = document.getElementById('closeMessageButton');
|
| 117 |
+
|
| 118 |
+
// --- 游戏设置 ---
|
| 119 |
+
const grid = 20; // 每个格子的大小(像素)
|
| 120 |
+
const canvasSize = 400; // 画布大小(像素) - 确保是 grid 的倍数
|
| 121 |
+
canvas.width = canvasSize;
|
| 122 |
+
canvas.height = canvasSize;
|
| 123 |
+
|
| 124 |
+
// --- 游戏状态变量 ---
|
| 125 |
+
let snake; // 蛇的数组,每个元素是 {x, y}
|
| 126 |
+
let food; // 食物的位置 {x, y}
|
| 127 |
+
let score; // 分数
|
| 128 |
+
let direction; // 当前移动方向: 'up', 'down', 'left', 'right'
|
| 129 |
+
let nextDirection; // 玩家请求的下一个方向
|
| 130 |
+
let bufferedDirection; // 当与食物对齐时,缓存的下一个方向
|
| 131 |
+
let isAligned; // 蛇头是否与食物在同一行或同一列
|
| 132 |
+
let gameLoopTimeout; // 游戏循环的 Timeout ID
|
| 133 |
+
let isGameOver; // 游戏是否结束
|
| 134 |
+
|
| 135 |
+
// --- 初始化游戏 ---
|
| 136 |
+
function initGame() {
|
| 137 |
+
clearTimeout(gameLoopTimeout); // 清除之前的循环
|
| 138 |
+
hideMessage(); // 隐藏消息框
|
| 139 |
+
isGameOver = false;
|
| 140 |
+
|
| 141 |
+
// 初始化蛇的位置和方向
|
| 142 |
+
snake = [
|
| 143 |
+
{ x: Math.floor(canvasSize / grid / 2) * grid, y: Math.floor(canvasSize / grid / 2) * grid } // 初始在中间
|
| 144 |
+
];
|
| 145 |
+
direction = 'right'; // 初始向右移动
|
| 146 |
+
nextDirection = null; // 初始没有预定方向
|
| 147 |
+
bufferedDirection = null; // 初始没有缓存方向
|
| 148 |
+
isAligned = false; // 初始未对齐
|
| 149 |
+
|
| 150 |
+
// 初始化分数
|
| 151 |
+
score = 0;
|
| 152 |
+
scoreElement.textContent = `分数: ${score}`;
|
| 153 |
+
|
| 154 |
+
// 放置第一个食物
|
| 155 |
+
placeFood();
|
| 156 |
+
|
| 157 |
+
// 开始游戏循环
|
| 158 |
+
gameLoop();
|
| 159 |
+
}
|
| 160 |
+
|
| 161 |
+
// --- 放置食物 ---
|
| 162 |
+
function placeFood() {
|
| 163 |
+
let newFoodPosition;
|
| 164 |
+
do {
|
| 165 |
+
newFoodPosition = {
|
| 166 |
+
x: Math.floor(Math.random() * (canvasSize / grid)) * grid,
|
| 167 |
+
y: Math.floor(Math.random() * (canvasSize / grid)) * grid
|
| 168 |
+
};
|
| 169 |
+
} while (isFoodOnSnake(newFoodPosition)); // 确保食物不生成在蛇身上
|
| 170 |
+
food = newFoodPosition;
|
| 171 |
+
}
|
| 172 |
+
|
| 173 |
+
// --- 检查食物是否在蛇身上 ---
|
| 174 |
+
function isFoodOnSnake(position) {
|
| 175 |
+
for (let i = 0; i < snake.length; i++) {
|
| 176 |
+
if (snake[i].x === position.x && snake[i].y === position.y) {
|
| 177 |
+
return true;
|
| 178 |
+
}
|
| 179 |
+
}
|
| 180 |
+
return false;
|
| 181 |
+
}
|
| 182 |
+
|
| 183 |
+
// --- 游戏循环 ---
|
| 184 |
+
function gameLoop() {
|
| 185 |
+
if (isGameOver) {
|
| 186 |
+
return; // 如果游戏结束,停止循环
|
| 187 |
+
}
|
| 188 |
+
|
| 189 |
+
// 设置游戏速度(数字越小越快)
|
| 190 |
+
const speed = 150; // 毫秒
|
| 191 |
+
|
| 192 |
+
gameLoopTimeout = setTimeout(() => {
|
| 193 |
+
// 清除画布
|
| 194 |
+
ctx.clearRect(0, 0, canvasSize, canvasSize);
|
| 195 |
+
|
| 196 |
+
// 更新状态(移动,检查碰撞等)
|
| 197 |
+
update();
|
| 198 |
+
|
| 199 |
+
// 绘制游戏元素
|
| 200 |
+
draw();
|
| 201 |
+
|
| 202 |
+
// 继续下一帧
|
| 203 |
+
requestAnimationFrame(gameLoop); // 使用 requestAnimationFrame 替代 setTimeout 以获得更平滑的动画
|
| 204 |
+
}, speed);
|
| 205 |
+
}
|
| 206 |
+
|
| 207 |
+
// --- 更新游戏状态 ---
|
| 208 |
+
function update() {
|
| 209 |
+
// 检查蛇头是否与食物对齐
|
| 210 |
+
const head = snake[0];
|
| 211 |
+
isAligned = (head.x === food.x || head.y === food.y);
|
| 212 |
+
|
| 213 |
+
// --- 处理方向改变 ---
|
| 214 |
+
if (isAligned) {
|
| 215 |
+
// 如果对齐,并且玩家请求了新方向,则缓存它
|
| 216 |
+
if (nextDirection) {
|
| 217 |
+
// 检查缓存的方向是否与当前方向相反
|
| 218 |
+
if (!isOppositeDirection(nextDirection, direction)) {
|
| 219 |
+
bufferedDirection = nextDirection;
|
| 220 |
+
}
|
| 221 |
+
nextDirection = null; // 清除立即生效的请求
|
| 222 |
+
}
|
| 223 |
+
// 蛇继续按当前方向移动 (direction 不变)
|
| 224 |
+
} else {
|
| 225 |
+
// 如果不对齐
|
| 226 |
+
// 1. 检查是否有缓存的方向
|
| 227 |
+
if (bufferedDirection) {
|
| 228 |
+
// 检查缓存的方向是否与当前方向相反
|
| 229 |
+
if (!isOppositeDirection(bufferedDirection, direction)) {
|
| 230 |
+
direction = bufferedDirection; // 应用缓存的方向
|
| 231 |
+
}
|
| 232 |
+
bufferedDirection = null; // 清除缓存
|
| 233 |
+
nextDirection = null; // 也清除,避免冲突
|
| 234 |
+
}
|
| 235 |
+
// 2. 如果没有缓存,检查是否有新的请求方向
|
| 236 |
+
else if (nextDirection) {
|
| 237 |
+
// 检查请求的方向是否与当前方向相反
|
| 238 |
+
if (!isOppositeDirection(nextDirection, direction)) {
|
| 239 |
+
direction = nextDirection; // 应用请求的方向
|
| 240 |
+
}
|
| 241 |
+
nextDirection = null; // 清除请求
|
| 242 |
+
}
|
| 243 |
+
}
|
| 244 |
+
|
| 245 |
+
// --- 计算蛇头的新位置 ---
|
| 246 |
+
let newHead = { x: head.x, y: head.y };
|
| 247 |
+
switch (direction) {
|
| 248 |
+
case 'up': newHead.y -= grid; break;
|
| 249 |
+
case 'down': newHead.y += grid; break;
|
| 250 |
+
case 'left': newHead.x -= grid; break;
|
| 251 |
+
case 'right': newHead.x += grid; break;
|
| 252 |
+
}
|
| 253 |
+
|
| 254 |
+
// --- 检查碰撞 ---
|
| 255 |
+
// 1. 撞墙
|
| 256 |
+
if (newHead.x < 0 || newHead.x >= canvasSize || newHead.y < 0 || newHead.y >= canvasSize) {
|
| 257 |
+
gameOver("撞到墙了!");
|
| 258 |
+
return;
|
| 259 |
+
}
|
| 260 |
+
// 2. 撞自己
|
| 261 |
+
for (let i = 1; i < snake.length; i++) {
|
| 262 |
+
if (newHead.x === snake[i].x && newHead.y === snake[i].y) {
|
| 263 |
+
gameOver("撞到自己了!");
|
| 264 |
+
return;
|
| 265 |
+
}
|
| 266 |
+
}
|
| 267 |
+
|
| 268 |
+
// --- 移动蛇 ---
|
| 269 |
+
snake.unshift(newHead); // 在前面添加新头
|
| 270 |
+
|
| 271 |
+
// --- 检查是否“吃到”食物 ---
|
| 272 |
+
// 在这个版本中,蛇不会真的吃掉食物,只是触发食物重新生成
|
| 273 |
+
if (newHead.x === food.x && newHead.y === food.y) {
|
| 274 |
+
score++; // 增加分数
|
| 275 |
+
scoreElement.textContent = `分数: ${score}`;
|
| 276 |
+
placeFood(); // 重新放置食物
|
| 277 |
+
// 注意:蛇的尾巴不会移除,所以蛇会一直增长
|
| 278 |
+
} else {
|
| 279 |
+
// 如果没有吃到食物,移除尾巴 (正常移动)
|
| 280 |
+
// 如果想让蛇一直增长,注释掉下面这行
|
| 281 |
+
// snake.pop();
|
| 282 |
+
}
|
| 283 |
+
|
| 284 |
+
// 如果想让蛇一直增长,即使没碰到食物,就把 snake.pop() 移到上面 else 之外
|
| 285 |
+
// 如果只想在碰到食物时增长,保持现状即可
|
| 286 |
+
|
| 287 |
+
// --- 特殊规则:如果没碰到食物,移除尾巴 ---
|
| 288 |
+
// (这使得游戏更像传统贪吃蛇,但食物无法被“吃掉”来增长)
|
| 289 |
+
if (!(newHead.x === food.x && newHead.y === food.y)) {
|
| 290 |
+
snake.pop();
|
| 291 |
+
}
|
| 292 |
+
|
| 293 |
+
|
| 294 |
+
}
|
| 295 |
+
|
| 296 |
+
// --- 绘制游戏元素 ---
|
| 297 |
+
function draw() {
|
| 298 |
+
// 绘制蛇
|
| 299 |
+
ctx.fillStyle = '#33ff33'; // 蛇的颜色 (亮绿色)
|
| 300 |
+
snake.forEach(segment => {
|
| 301 |
+
ctx.fillRect(segment.x, segment.y, grid, grid);
|
| 302 |
+
ctx.strokeStyle = '#000000'; // 黑色边框,增加清晰度
|
| 303 |
+
ctx.strokeRect(segment.x, segment.y, grid, grid);
|
| 304 |
+
});
|
| 305 |
+
|
| 306 |
+
// 绘制食物
|
| 307 |
+
ctx.fillStyle = '#ff3333'; // 食物颜色 (红色)
|
| 308 |
+
ctx.fillRect(food.x, food.y, grid, grid);
|
| 309 |
+
ctx.strokeStyle = '#ffffff'; // 白色边框
|
| 310 |
+
ctx.strokeRect(food.x, food.y, grid, grid);
|
| 311 |
+
|
| 312 |
+
// 如果对齐,给蛇头或食物加点提示?(可选)
|
| 313 |
+
if (isAligned) {
|
| 314 |
+
ctx.fillStyle = 'rgba(255, 255, 0, 0.3)'; // 半透明黄色高亮
|
| 315 |
+
// 高亮蛇头和食物所在的行列
|
| 316 |
+
// ctx.fillRect(snake[0].x, 0, grid, canvasSize); // 高亮列
|
| 317 |
+
// ctx.fillRect(0, snake[0].y, canvasSize, grid); // 高亮行
|
| 318 |
+
// 或者只高亮蛇头
|
| 319 |
+
ctx.fillStyle = 'yellow';
|
| 320 |
+
ctx.fillRect(snake[0].x, snake[0].y, grid, grid);
|
| 321 |
+
}
|
| 322 |
+
}
|
| 323 |
+
|
| 324 |
+
// --- 检查是否是相反方向 ---
|
| 325 |
+
function isOppositeDirection(dir1, dir2) {
|
| 326 |
+
return (dir1 === 'up' && dir2 === 'down') ||
|
| 327 |
+
(dir1 === 'down' && dir2 === 'up') ||
|
| 328 |
+
(dir1 === 'left' && dir2 === 'right') ||
|
| 329 |
+
(dir1 === 'right' && dir2 === 'left');
|
| 330 |
+
}
|
| 331 |
+
|
| 332 |
+
|
| 333 |
+
// --- 处理键盘输入 ---
|
| 334 |
+
document.addEventListener('keydown', (e) => {
|
| 335 |
+
if (isGameOver) return; // 游戏结束时忽略输入
|
| 336 |
+
|
| 337 |
+
let requestedDir = null;
|
| 338 |
+
switch (e.key) {
|
| 339 |
+
case 'ArrowUp':
|
| 340 |
+
case 'w': // 添加 WASD 控制
|
| 341 |
+
requestedDir = 'up';
|
| 342 |
+
break;
|
| 343 |
+
case 'ArrowDown':
|
| 344 |
+
case 's':
|
| 345 |
+
requestedDir = 'down';
|
| 346 |
+
break;
|
| 347 |
+
case 'ArrowLeft':
|
| 348 |
+
case 'a':
|
| 349 |
+
requestedDir = 'left';
|
| 350 |
+
break;
|
| 351 |
+
case 'ArrowRight':
|
| 352 |
+
case 'd':
|
| 353 |
+
requestedDir = 'right';
|
| 354 |
+
break;
|
| 355 |
+
}
|
| 356 |
+
|
| 357 |
+
// 只有当请求的方向不是当前方向的直接反方向时,才设置 nextDirection
|
| 358 |
+
// 同时,也检查不能是 nextDirection 的反方向(防止快速连续按键导致180度转弯)
|
| 359 |
+
const effectiveCurrentDirection = bufferedDirection || direction; // 考虑缓存的方向
|
| 360 |
+
if (requestedDir &&
|
| 361 |
+
!isOppositeDirection(requestedDir, effectiveCurrentDirection) &&
|
| 362 |
+
(!nextDirection || !isOppositeDirection(requestedDir, nextDirection)))
|
| 363 |
+
{
|
| 364 |
+
nextDirection = requestedDir;
|
| 365 |
+
}
|
| 366 |
+
// 阻���方向键滚动页面
|
| 367 |
+
if (['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight'].includes(e.key)) {
|
| 368 |
+
e.preventDefault();
|
| 369 |
+
}
|
| 370 |
+
});
|
| 371 |
+
|
| 372 |
+
// --- 游戏结束处理 ---
|
| 373 |
+
function gameOver(reason) {
|
| 374 |
+
isGameOver = true;
|
| 375 |
+
clearTimeout(gameLoopTimeout); // 停止游戏循环
|
| 376 |
+
showMessage(`游戏结束! ${reason}<br>最终分数: ${score}`);
|
| 377 |
+
}
|
| 378 |
+
|
| 379 |
+
// --- 显示消息框 ---
|
| 380 |
+
function showMessage(msg) {
|
| 381 |
+
messageText.innerHTML = msg; // 使用 innerHTML 以支持 <br>
|
| 382 |
+
messageBox.style.display = 'block';
|
| 383 |
+
}
|
| 384 |
+
|
| 385 |
+
// --- 隐藏消息框 ---
|
| 386 |
+
function hideMessage() {
|
| 387 |
+
messageBox.style.display = 'none';
|
| 388 |
+
}
|
| 389 |
+
|
| 390 |
+
// --- 事件监听器 ---
|
| 391 |
+
resetButton.addEventListener('click', initGame);
|
| 392 |
+
closeMessageButton.addEventListener('click', hideMessage);
|
| 393 |
+
|
| 394 |
+
// --- 初始启动游戏 ---
|
| 395 |
+
initGame();
|
| 396 |
+
|
| 397 |
+
</script>
|
| 398 |
+
|
| 399 |
+
</body>
|
| 400 |
</html>
|