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贪吃蛇.html
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贪吃蛇.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>贪吃蛇</title>
<style type="text/css">
body, table, td, tr {
padding: 0;
margin: 0;
}
td {
width: 48px;
height: 48px;
border: 1px solid #6eb3d8;
}
#map {
background: #6eb3d8;
width: 500px;
height: 500px;
opacity: 0.3;
position: absolute;
top: 0;
}
div {
width: 50px;
height: 50px;
position: absolute;
}
#game {
position: absolute;
top: 510px;
left: 20px;
}
#a {
position: absolute;
top: 515px;
}
#b {
position: absolute;
top: 515px;
left: 50px;
}
#c {
position: absolute;
top: 515px;
left: 100px;
}
</style>
</head>
<body>
<div id="map"></div>
<h3 id="game"><p id="score">本轮成绩为:</p></h3>
<input type="button" value="慢" οnclick="speed('1000')" id="a">
<input type="button" value="中" οnclick="speed('500')" id="b">
<input type="button" value="块" οnclick="speed('100')" id="c">
<script>
//分数的id
var score = document.getElementById("score");
//初始化分数为0
var scoreNum = 0;
//第一步：创建表格
document.write("<table cellspacing='0'>");
for (var n = 0; n < 10; n++) {
document.write("<tr>")
for (var m = 0; m < 10; m++) {
document.write("<td></td>");
}
document.write("</tr>")
}
document.write("</table>");
//第二步：创建地图
var map = document.getElementById("map");
//第三步：创建所有块，蛇头 身体 食物
function createNode(type) {
//获取蛇头的随机坐标
var x = parseInt(Math.random() * 10) * 50;
var y = parseInt(Math.random() * 10) * 50;
//alert(x);
//添加三块的div
var div = document.createElement("div");
div.style.left = x + "px";
div.style.top = y + "px";
map.appendChild(div);
if (type == 0) {//蛇头
div.style.background = "red";
}
if (type == 1) {//身体
div.style.background = "yellow";
}
if (type == 2) {//食物
div.style.background = "blue";
}
return div;
}
var allNode = new Array();//存所有的身体
var allHeadBody = new Array();//存头和身体
//第三步：创建头部的div
var headNode = null;
var foodNode = null;
headNode = createNode(0);
foodNode = createNode(2);
allHeadBody.push(headNode);//把蛇头添加到存储头和身体的数组中
headNode.value = 37;
//第三步：移动头部
function moveNode() {
//判断游戏有没有出界
if (parseInt(headNode.style.top) >= 500 || parseInt(headNode.style.left) >= 500 || parseInt(headNode.style.top) < 0 || parseInt(headNode.style.left) < 0) {
alert("游戏结束");
//停止游戏，停止定时器，则把定时器给一个变量
clearInterval(stopGame);
}
//第四步：检测是否碰撞
if (headNode.style.left == foodNode.style.left && headNode.style.top == foodNode.style.top) {
//碰撞一次加0分
scoreNum += 10;
//写入到score中
score.innerHTML = "本轮成绩为：" + scoreNum;
//第五步：创建身体,记录当前的身体
var bodyNode = createNode(1);
var lastNode = null;//身体的最后一块
//判断身体最后一块的方向（键盘位置）
if (allNode.length == 0) {
lastNode = headNode;
} else {
lastNode = allNode[allNode.length - 1];
}
bodyNode.value = lastNode.value;
switch (parseInt(lastNode.value)) {//根据蛇头判断 身体的位置
case 37:
bodyNode.style.left = parseInt(lastNode.style.left) + 50 + "px";
bodyNode.style.top = lastNode.style.top;
break;
case 38:
bodyNode.style.top = parseInt(lastNode.style.top) + 50 + "px";
bodyNode.style.left = lastNode.style.left;
break;
case 39:
bodyNode.style.left = parseInt(lastNode.style.left) - 50 + "px";
bodyNode.style.top = lastNode.style.top;
break;
case 40:
bodyNode.style.top = parseInt(lastNode.style.top) - 50 + "px";
bodyNode.style.left = lastNode.style.left;
break;
}
allNode.push(bodyNode);//存所有的身体
allHeadBody.push(bodyNode);//存的头和身体
//判断食物和身体不能重叠
var foodbool = true;
var px = 0;
var py = 0;
var num = 0;
while (foodbool) {
px = parseInt(Math.random() * 10) * 50 + "px";
py = parseInt(Math.random() * 10) * 50 + "px";
for (var n = 0; n < allHeadBody.length; n++) {
if (allHeadBody[n].style.left == px && allHeadBody[n].style.top == py) {
num++;
}
}
if (num == 0) {
foodbool = false;
} else {
num = 0;
}
}
foodNode.style.left = px;
foodNode.style.top = py;
//
}
//让身体跟着蛇头走
if (allNode.length > 0) {
for (var n = allNode.length - 1; n >= 0; n--) {
//判断蛇头和身体不能碰撞
if (headNode.style.left == allNode[n].style.left && headNode.style.top == allNode[n].style.top) {
alert("游戏结束，碰撞身体了！");
clearInterval(stopGame);
}
switch (parseInt(allNode[n].value)) {
case 37:
allNode[n].style.left = parseInt(allNode[n].style.left) - 50 + "px";
break;
case 38:
allNode[n].style.top = parseInt(allNode[n].style.top) - 50 + "px";
break;
case 39:
allNode[n].style.left = parseInt(allNode[n].style.left) + 50 + "px";
break;
case 40:
allNode[n].style.top = parseInt(allNode[n].style.top) + 50 + "px";
break;
}
if (n > 0) {
allNode[n].value = allNode[n - 1].value;
} else {
allNode[n].value = headNode.value;
}
}
}
//根据headNode.value的初始值移动蛇头方向
switch (parseInt(headNode.value)) {
case 37://左
headNode.style.left = (parseInt(headNode.style.left) - 50) + "px";
break;
case 38://上
headNode.style.top = (parseInt(headNode.style.top) - 50 ) + "px";
break;
case 39://右
headNode.style.left = (parseInt(headNode.style.left) + 50) + "px";
break;
case 40://上
headNode.style.top = (parseInt(headNode.style.top) + 50) + "px";
break;
}
}//移动蛇头结束
//控制速度
//初始默认的速度
var newspeed = 500;
function speed(num) {
newspeed = num;
// clearInterval(stopGame);
stopGame = setInterval(moveNode, newspeed);
speed=null;//函数执行一次，第二次调用则函数为空
}
//stopGame = setInterval(moveNode, newspeed);
document.onkeydown = function () {
// alert(event.keyCode);
switch (event.keyCode) {
case 37://左
if (headNode.value != 39 || allNode.length <= 0) {
headNode.value = 37;
}
break;
case 38://上
if (headNode.value != 40 || allNode.length <= 0) {
headNode.value = 38;
}
break;
case 39://右
if (headNode.value != 37 || allNode.length <= 0) {
headNode.value = 39;
}
break;
case 40://上
if (headNode.value != 38 || allNode.length <= 0) {
headNode.value = 40;
}
break;
}
}
</script>
</body>
</html>