Js 贪吃蛇
转载
<!DOCTYPE html>
<html>
<head>
<title>贪吃蛇</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
.backDiv {
text-align: center;
position: absolute;
top: 20px;
left: 300px;
width: 820px;
height: 550px;
}
.display {
position: absolute;
top: 0px;
left: 685px;
width: 180px;
height: 510px;
border: 5px solid black;
background-color: #ccffff;
}
#gamePanel table {
border-collapse: collapse; /*合并单元格边框*/
border: 5px solid black;
background-color: #f0f0f0;
}
#gamePanel td {
width: 15px;
height: 15px;
}
#scoreDiv {
position: absolute;
top: 20px;
left: 20px;
text-align: left;
font-size: 20px;
font-weight: bold;
}
#prompt {
position: absolute;
top: 180px;
left: 20px;
text-align: left;
font-weight: bold;
}
#operator {
position: absolute;
top: 550px;
left: 100px;
}
#result {
position: absolute;
top: 200px;
left: 220px;
background-color: #00ffff;
font-size: 20px;
font-weight: bold;
text-align: left;
padding: 20px;
}
</style>
<script>
var snake = []; // 蛇数组
var barrers = []; // 障碍物数组
var game = { sizeX: '30', sizeY: '40', record: '0' };
var appearTime = (disappearTime = 0); // 超级食物出现
var superFoodX = (superFoodY = null);
var color = 0; // 食物颜色
function init() {
clearTimeout(game.time);
snake = [];
barrers = [];
game.x = 0;
game.y = 1;
game.dir = null;
game.direction = 'right';
game.rate = null;
game.lengths = 2; // 蛇的长度
game.score = 0;
$('scoreDiv').innerHTML =
'得分：' +
game.score +
'<br/><br/>长度：' +
game.lengths +
'<br/><br/>' +
'最高分：' +
game.record;
$('pass').disabled = false;
$('rate').disabled = false;
$('start').disabled = false;
bord(); // 设置界面
barrer(); // 设置障碍物
$('result').style.visibility = 'hidden';
snake.push('tb_' + game.x + '_' + (game.y - 1));
snake.push('tb_' + game.x + '_' + game.y); // 蛇头
}
function $(id) {
return document.getElementById(id);
}
// 表格
function bord() {
var panel = []; // 游戏面板
var proPanel = []; // 提示面板
panel.push('<table>');
for (var i = 0; i < game.sizeX; i++) {
panel.push('<tr>');
for (var j = 0; j < game.sizeY; j++) {
panel.push('<td id="tb_' + i + '_' + j + '" > </td>');
}
panel.push('</tr>');
}
panel.push('</table>');
$('gamePanel').innerHTML = panel.join('');
proPanel.push('<table>');
proPanel.push(
'<tr>' +
'<td width="20px" height="20px" bgcolor="#ff3300"></td>' +
'<td> 得分+10</td>' +
'</tr>'
);
proPanel.push(
'<tr>' +
'<td width="20px" height="20px" bgcolor="#33cc33"></td>' +
'<td> 得分+30</td>' +
'</tr>'
);
proPanel.push(
'<tr>' +
'<td width="20px" height="20px" bgcolor="#99ff66"></td>' +
'<td> 得分+50</td>' +
'</tr>'
);
proPanel.push(
'<tr>' +
'<td width="20px" height="20px" bgcolor="#ffff00"></td>' +
'<td> 得分+100</td>' +
'</tr>'
);
proPanel.push(
'<tr>' +
'<td width="20px" height="20px" bgcolor="#006600"></td>' +
'<td> 得分-30</td>' +
'</tr>'
);
proPanel.push(
'<tr>' +
'<td width="20px" height="20px" bgcolor="#000000"></td>' +
'<td> 得分-50</td>'
);
proPanel.push('</table>');
$('prompt').innerHTML = proPanel.join('');
}
// 关卡障碍物设置
function barrer() {
var passValue = $('pass').value;
for (var i = 0; i < barrers.length; i++) {
$(barrers[i]).style.backgroundColor = '';
}
barrers = [];
if (passValue == 2) {
for (var i = 8; i < game.sizeX - 8; i++) {
barrers.push('tb_' + i + '_' + 10);
barrers.push('tb_' + i + '_' + (game.sizeY - 10));
}
}
if (passValue == 3) {
for (var i = 8; i < game.sizeY - 8; i++) {
barrers.push('tb_' + Math.floor(game.sizeX / 2) + '_' + i);
}
for (var i = 6; i < game.sizeX - 6; i++) {
barrers.push('tb_' + i + '_' + Math.floor(game.sizeY / 2));
}
}
if (passValue == 4) {
for (var i = 12; i < game.sizeY - 11; i++) {
barrers.push('tb_' + Math.floor(game.sizeX / 2) + '_' + i);
}
for (var j = 6; j < game.sizeX - 6; j++) {
barrers.push('tb_' + j + '_' + Math.floor(game.sizeY / 2 + 1));
}
for (var i = 6; i < game.sizeX - 6; i++) {
if (i < game.sizeX / 2) {
barrers.push('tb_' + i + '_' + 12);
} else {
barrers.push('tb_' + i + '_' + (game.sizeY - 11));
}
}
for (var j = 12; j < game.sizeY - 11; j++) {
if (j <= game.sizeY / 2) {
barrers.push('tb_' + (game.sizeX - 7) + '_' + j);
} else {
barrers.push('tb_' + 6 + '_' + (j + 1));
}
}
}
if (passValue == 5) {
for (var i = 0; i < 14; i++) {
barrers.push('tb_' + 7 + '_' + i);
barrers.push('tb_' + (game.sizeX - 8) + '_' + (game.sizeY - i - 1));
}
for (var i = 15; i < 25; i++) {
if (i < 18 || i > 21) {
barrers.push('tb_' + 10 + '_' + i);
barrers.push('tb_' + (game.sizeX - 11) + '_' + i);
}
}
for (var i = 0; i < 9; i++) {
barrers.push('tb_' + i + '_' + (game.sizeY - 13));
barrers.push('tb_' + (game.sizeX - i - 1) + '_' + 12);
}
for (var i = 11; i < 19; i++) {
if (i < 13 || i > 16) {
barrers.push('tb_' + i + '_' + 15);
barrers.push('tb_' + i + '_' + (game.sizeY - 16));
}
}
}
// 设置障碍物颜色
for (var i = 0; i < barrers.length; i++) {
$(barrers[i]).style.backgroundColor = '#660033';
}
}
// 开始游戏
function startGame() {
food();
game.start = true;
$('pass').disabled = true;
$('rate').disabled = true;
$('start').disabled = true;
game.rate = $('rate').value;
$(snake[0]).style.backgroundColor = '#0066ff';
$(snake[1]).style.backgroundColor = 'blue';
game.time = setTimeout(function () {
snakeMove();
}, game.rate);
superFood();
}
// 蛇移动 速度，方向
function snakeMove() {
if (game.direction == 'right') {
game.y += 1;
} // 右移
if (game.direction == 'left') {
game.y -= 1;
} // 左移
if (game.direction == 'up') {
game.x -= 1;
} // 上移
if (game.direction == 'down') {
game.x += 1;
} // 下移
// 判断游戏是否结束
if (result() == true) {
clearTimeout(game.time);
clearTimeout(appearTime);
clearTimeout(disappearTime);
game.start = false;
var res = '游戏结束!<br/>';
if (game.score > game.record) {
res += '恭喜你破纪录啦！<br/>';
$('scoreDiv').innerHTML =
'得分：' + game.score + '<br/><br/>最高分：' + game.record;
}
res += '您的得分为：' + game.score + '<br/>长度:' + game.lengths;
$('result').style.visibility = 'visible';
$('result').innerHTML = res;
return;
}
if (game.x == game.fx && game.y == game.fy) {
eat(1);
}
if (game.x == superFoodX && game.y == superFoodY) {
eat(2);
}
move();
game.time = setTimeout(function () {
snakeMove(game.rate, game.direction);
}, game.rate);
}
function move() {
$(snake[0]).style.backgroundColor = '';
// 保留蛇当前的位置
for (var i = 1; i < snake.length; i++) {
snake[i - 1] = snake[i];
}
snake[snake.length - 1] = 'tb_' + game.x + '_' + game.y; // 蛇头位置
for (var i = 0; i < snake.length - 1; i++) {
$(snake[i]).style.backgroundColor = '#0066ff';
}
$(snake[i]).style.backgroundColor = 'blue';
}
// 食物 位置随机且不能与蛇位置重复
function food() {
game.fx = Math.floor(Math.random(game.sizeX) * game.sizeX);
game.fy = Math.floor(Math.random(game.sizeY) * game.sizeY);
if ($('tb_' + game.fx + '_' + game.fy).style.backgroundColor != '') {
food();
} else {
$('tb_' + game.fx + '_' + game.fy).style.backgroundColor = '#ff3300';
}
}
// 超级食物出现
function superFood() {
appearTime = setTimeout(function () {
var n = Math.floor(Math.random(10) * 10);
superFoodX = Math.floor(Math.random(game.sizeX) * game.sizeX);
superFoodY = Math.floor(Math.random(game.sizeY) * game.sizeY);
if (
$('tb_' + superFoodX + '_' + superFoodY).style.backgroundColor != ''
) {
superFood();
} else {
if (
'tb_' + superFoodX + '_' + superFoodY ==
'tb_' + game.fx + '_' + game.fy
) {
superFood();
return;
}
if (n < 3) {
$('tb_' + superFoodX + '_' + superFoodY).style.backgroundColor =
'#33cc33';
color = 0;
} else if (3 <= n && n < 5) {
$('tb_' + superFoodX + '_' + superFoodY).style.backgroundColor =
'#006600';
color = 1;
} else if (5 <= n && n < 7) {
$('tb_' + superFoodX + '_' + superFoodY).style.backgroundColor =
'#99ff66';
color = 2;
} else if (7 <= n && n < 9) {
$('tb_' + superFoodX + '_' + superFoodY).style.backgroundColor =
'#000000';
color = 3;
} else {
$('tb_' + superFoodX + '_' + superFoodY).style.backgroundColor =
'#ffff00';
color = 4;
}
clearTimeout(disappearTime);
superFood();
// 一定时间后超级食物消失
disappearTime = setTimeout(function () {
$('tb_' + superFoodX + '_' + superFoodY).style.backgroundColor =
'';
superFoodX = superFoodY = null;
}, game.rate * 120 - game.rate * 50);
}
}, game.rate * 120);
}
// 蛇吃食物
function eat(ef) {
// 吃普通食物
if (ef == 1) {
snake.push('tb_' + game.fx + '_' + game.fy);
game.score += 10;
food();
}
// 吃超级食物
if (ef == 2) {
if (color == 0) {
game.score += 30;
} else if (color == 1) {
game.score -= 30;
} else if (color == 2) {
game.score += 50;
} else if (color == 3) {
game.score -= 50;
} else {
game.score += 100;
}
snake.push('tb_' + superFoodX + '_' + superFoodY);
if (game.score < 0) {
game.score = 0;
}
clearTimeout(disappearTime);
}
game.lengths += 1;
$('scoreDiv').innerHTML =
'得分：' +
game.score +
'<br/><br/>长度：' +
game.lengths +
'<br/><br/>最高分：' +
game.record;
}
// 游戏结束
function result() {
var next = 'tb_' + game.x + '_' + game.y;
if (
game.x < 0 ||
game.x >= game.sizeX ||
game.y < 0 ||
game.y >= game.sizeY
) {
return true;
}
for (var i = 0; i < snake.length; i++) {
if (next == snake[i]) {
return true;
}
}
for (var i = 0; i < barrers.length; i++) {
if (next == barrers[i]) {
return true;
}
}
return false;
}
// 键盘控制
function control(v) {
var evt = v;
game.dir = game.direction;
if (37 <= evt.keyCode && evt.keyCode <= 40 && game.start) {
if (evt.keyCode == 37) {
game.dir == 'right'
? (game.direction = 'right')
: (game.direction = 'left');
} // 左
if (evt.keyCode == 38) {
game.dir == 'down'
? (game.direction = 'down')
: (game.direction = 'up');
} // 上
if (evt.keyCode == 39) {
game.dir == 'left'
? (game.direction = 'left')
: (game.direction = 'right');
} // 右
if (evt.keyCode == 40) {
game.dir == 'up'
? (game.direction = 'up')
: (game.direction = 'down');
} // 下
if (game.dir != game.direction) {
clearTimeout(game.time);
snakeMove();
}
}
}
</script>
</head>
<body onload="init();" onkeyup="control(event);">
<div class="backDiv">
<div class="display">
<div id="scoreDiv">分数：0</div>
<br />
<div id="prompt"></div>
</div>
<div id="gamePanel"></div>
<br />
<div id="operator">
选择关卡：<select id="pass" onchange="barrer();">
<option value="1">关卡1</option>
<option value="2">关卡2</option>
<option value="3">关卡3</option>
<option value="4">关卡4</option>
<option value="5">关卡5</option> </select
> 速度：<select id="rate">
<option value="500">慢</option>
<option value="450">较慢</option>
<option value="300">中等</option>
<option value="200">较快</option>
<option value="100">快</option> </select
>
<input
type="button"
id="start"
value="开始"
onclick="startGame();"
/>
<input type="button" id="resets" value="重玩" onclick="init();" />
</div>
<div id="result"></div>
</div>
<div style="text-align: center;">
<p><a href="http://www.mycodes.net/" target="_blank">源码之家</a></p>
</div>
</body>
</html>
