-
Notifications
You must be signed in to change notification settings - Fork 913
/
贪吃蛇.html
202 lines (202 loc) · 6.84 KB
/
贪吃蛇.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
*{
margin: 0;
padding: 0;
}
#container{
width: 1000px;
height: 550px;
border: 1px solid #000;
margin: 100px auto;
}
#ground{
width: 1000px;
height: 500px;
position: relative;
}
#button{
float: right;
height: 50px;
line-height: 50px;
}
button{
width: 50px;
height: 20px;
cursor: pointer;
}
.block{
width: 20px;
height: 20px;
background: #2abad9;
float: left;
}
.snakeBody{
width: 20px;
height: 20px;
position: absolute;
background: #f57926;
}
.food{
width: 20px;
height: 20px;
background: green;
position: absolute;
}
</style>
</head>
<body>
<div id="container">
<div id="ground"></div>
<div id="gameControl">
<div id="button">
<button id="start">开始</button>
<button id="pause">暂停</button>
</div>
</div>
</div>
</body>
<script>
var timer;
window.onload=function(){
createGrass();
createSnake();
createFood();
document.getElementById('start').onclick=function(){
clearInterval(timer); //防止多次点击开始
timer=setInterval(function(){
snakeMove(diRection);
},150);
snakeMove(diRection);
};
document.getElementById('pause').onclick=function(){
clearInterval(timer);
};
};
//创建草坪
function createGrass(){
var oGround=document.getElementById('ground');
var oDiv;
for(var i=0;i<50;i++){
for(var j=0;j<25;j++){
oDiv=document.createElement('div');
oDiv.className='block';
oGround.appendChild(oDiv);
}
}
}
//创建蛇
var snakeBody=[],oFood,diRection='left';
function createSnake(){
var oGround=document.getElementById('ground');
var oDiv;
for(var i=0;i<3;i++){
oDiv=document.createElement('div');
oDiv.className='snakeBody';
oDiv.style.left=(i+40)*20+'px';
oDiv.style.top='60px';
oGround.appendChild(oDiv);
snakeBody.push(oDiv);
}
}
//创建食物
function createFood(){
var flag=true; //该标识用于判断生成的div是否和蛇身div重合
var oGround=document.getElementById('ground');
// var oDiv;
var len=snakeBody.length;
var iLeft,iTop;
oFood=document.createElement('div');
oFood.className='food';
iLeft=parseInt(Math.random()*49)*20;
iTop=parseInt(Math.random()*24)*20;
for(var i=0;i<len;i++){
if(snakeBody[i].offsetLeft == iLeft && snakeBody[i].offsetTop == iTop){ //可console.log(snakeBody[i]),其中是按照offsetLeft和offsetTop来确定方块位置的
flag=false;
break;
}
}
if(flag==true){
oFood.style.left=iLeft+'px';
oFood.style.top=iTop+'px';
oGround.appendChild(oFood);
}else{
createFood(); //若生成的div有重合则再次调用自身
}
}
//蛇运动
function snakeMove(direction){ //direction用于作为蛇移动的四个方向的判断
var snakeHead=snakeBody[0]; //获取蛇头
diRection=direction; //用于防止比如蛇身本来往左边走，但是向右按钮仍然有效的情况
for(var i=snakeBody.length-1;i>0;i--){ //移动说白了就是后面的div使用它前一个div的位置
snakeBody[i].style.left=snakeBody[i-1].offsetLeft+'px';
snakeBody[i].style.top=snakeBody[i-1].offsetTop+'px';
}
switch (direction){ //蛇头的位置
case 'left':snakeHead.style.left=snakeHead.offsetLeft-20+'px';break;
case 'right':snakeHead.style.left=snakeHead.offsetLeft+20+'px';break;
case 'up':snakeHead.style.top=snakeHead.offsetTop-20+'px';break;
case 'down':snakeHead.style.top=snakeHead.offsetTop+20+'px';break;
}
//蛇头碰壁
if(snakeHead.offsetLeft == -20 || snakeHead.offsetLeft == 1000 || snakeHead.offsetTop == -20 || snakeHead.offsetTop == 500){
clearInterval(timer);
if(confirm('再来一次?')){
window.location.reload();
}
}
//蛇碰到自身
for(var j=1;j<snakeBody.length;j++){
if(snakeHead.offsetLeft == snakeBody[j].offsetLeft && snakeHead.offsetTop == snakeBody[j].offsetTop){
clearInterval(timer);
if(confirm('再来一次')){
window.location.reload();
}
}
}
//吃掉食物
if(snakeHead.offsetLeft==oFood.offsetLeft && snakeHead.offsetTop==oFood.offsetTop){
oFood.className='snakeBody snake-block'; //食物变成和蛇身一样的颜色
console.log(snakeBody[snakeBody.length-1].offsetTop);
switch (direction){ //把oFood的坐标采用最后一个div的坐标
case 'left':oFood.style.left=snakeBody[snakeBody.length-1].offsetLeft+'px';break;
case 'right':oFood.style.left=snakeBody[snakeBody.length-1].offsetLeft+'px';break;
case 'up':oFood.style.top=snakeBody[snakeBody.length-1].offsetTop+'px';break;
case 'down':oFood.style.top=snakeBody[snakeBody.length-1].offsetTop+'px';break;
}
snakeBody.push(oFood); //这里最好用push把吃掉的div添加到蛇尾,添加到头部有一个问题，吐过实物div是靠边生成，那么吃掉后会超出墙范围或者直接撞墙
createFood();
}
}
//上下左右操作
document.onkeydown=function(e){ //document不要换成window，出滚动条的话，window会导致窗口移动
var event=e || window.event;
var direction=event.keyCode;
switch (direction){
case 37:
if(diRection != 'right'){
snakeMove('left');
}
break; //左
case 39:
if(diRection != 'left'){
snakeMove('right');
}
break; //右
case 38:
if(diRection != 'down'){
snakeMove('up');
}
break; //上
case 40:if(diRection != 'up'){
snakeMove('down');
}
break; //下
}
}
</script>
</html>