时间：2015-09-21 16:35作者：yezheng人气：185
HTML,CSS，Jquery写的贪吃蛇程序，只做了键盘控制蛇的移动方向，随机出现食物，然后吃掉食物，碰到墙壁自己返回，没有做身体变长。直接复制粘贴就可以看看效果了，推荐Firefox浏览器。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>贪吃蛇</title>
<style>
* { margin: 0; padding: 0; }
#header { border: 1px solid #000; position: relative; }
#box { height: 20px; background: red; display: block; position: absolute; text-align: center; z-index: 9999; }
#box li { width: 20px; height: 20px; float: left; display: inline; }
.food { width: 10px; height: 10px; position: absolute; text-align: center; background: green; z-index: 0 }
.transform_left { transform: rotate(360deg); -ms-transform: rotate(360deg); /* Internet Explorer */ -moz-transform: rotate(360deg); /* Firefox */ -webkit-transform: rotate(-180deg); /* Safari 和 Chrome */ -o-transform: rotate(360deg); /* Opera */ }
.transform_up { transform: rotate(90deg); -ms-transform: rotate(90deg); /* Internet Explorer */ -moz-transform: rotate(90deg); /* Firefox */ -webkit-transform: rotate(90deg); /* Safari 和 Chrome */ -o-transform: rotate(90deg); /* Opera */ }
.transform_down { transform: rotate(270deg); -ms-transform: rotate(270deg); /* Internet Explorer */ -moz-transform: rotate(270deg); /* Firefox */ -webkit-transform: rotate(270deg); /* Safari 和 Chrome */ -o-transform: rotate(270deg); /* Opera */ }
.transform_right { transform: rotate(180deg); -ms-transform: rotate(180deg); /* Internet Explorer */ -moz-transform: rotate(180deg); /* Firefox */ -webkit-transform: rotate(1800deg); /* Safari 和 Chrome */ -o-transform: rotate(180deg); /* Opera */ }
</style>
</head>
<body>
<div id="header">
<ul id="box">
<li>
1
</li>
<li>
</li>
</ul>
</div>
<div id="footer">
</div>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script>
var active = 'right';
var speed = 20;
var pix_x = 20;
var pix_y = 20;
var screen_x = speed * pix_x;
var screen_y = speed * pix_y;
var is_true = false;//是否撞击成功
//活动物体
var obj = $("#box");
//活动范围初始化
var header = $("#header");
var screen_width = screen_x + obj.width();
var screen_height = screen_y + obj.height()
header.width(screen_width);
header.height(screen_height);
//食物初始化
food_obj = food();
collide(obj, food_obj);
//开始做运动
setInterval(beam, 80);
/**
* 鼠标点击控制
*/
$(document).click(function(e){
var x = e.pageX;
var y = e.pageY;
if (x > screen_x) {
x = screen_x;
}
if (y > screen_y) {
y = screen_y;
}
obj.animate({
left: x,
top: y,
}, 'fast');
});
/**
* 键盘控制
*/
$(window).keydown(function(event){
obj.removeClass();
switch (event.keyCode * 1) {
case 37://左
active = 'left';
obj.addClass("transform_left");
break;
case 38://上
active = 'up';
obj.addClass("transform_up");
break;
case 39://右
active = 'right';
obj.addClass("transform_right");
break;
case 40://下
active = 'down';
obj.addClass("transform_down");
break;
}
});
/**
* 生成食物
*/
function food(){
//获取随机坐标
var rp = random_postion();
$("<div>", {
"text": "1",
"id": "food",
"class": "food",
}).appendTo("#header").css({
"top": rp.y,
"left": rp.x
});
return $("#food");
}
/**
* 两个物体撞击
* @param {Object} $obj_first
* @param {Object} $obj_second
*/
function collide($obj_first, $obj_second){
//第一个物体的四个角的坐标,第一个物体要大一点
var first_p = four_dot_sit($obj_first);
//第二个物体的四个角的坐标
var second_p = four_dot_sit($obj_second);
//小体左上角
if (second_p.left_top_x >= first_p.left_top_x &&
second_p.left_top_x <= first_p.right_top_x &&
second_p.left_top_y >= first_p.left_top_y &&
second_p.left_top_y <= first_p.left_bottom_y) {
return true;
}
//小体右下角
if (second_p.right_bottom_x >= first_p.left_top_x &&
second_p.right_bottom_x <= first_p.right_top_x &&
second_p.right_bottom_y >= first_p.left_top_y &&
second_p.right_bottom_y <= first_p.left_bottom_y) {
return true;
}
}
/**
* 一个物体的四个点的坐标
*/
function four_dot_sit($obj){
var width = $obj.width();
var height = $obj.height();
var p = {};
var pt = $obj.position();
var x = pt.left;
var y = pt.top;
//左上角坐标
p.left_top_x = x;
p.left_top_y = y;
//左下角坐标
p.left_bottom_x = x;
p.left_bottom_y = y + height;
//右上角坐标
p.right_top_x = x + width;
p.right_top_y = y;
//右下角坐标
p.right_bottom_x = x + width;
p.right_bottom_y = y + height;
return p;
}
/**
* 获取活动范围内的随机坐标
*/
function random_postion(){
var p = {};
p.x = Math.floor(Math.random() * pix_x) * speed;
p.y = Math.floor(Math.random() * pix_y) * speed;
return p;
}
/**
计算该物体到四个方向的距离
**/
function box_dis(){
var w = {};
w.left = obj.position().left;
w.top = obj.position().top;
w.bottom = screen_y - w.top;
w.right = screen_x - w.left;
return w;
}
/**
物体移动
**/
function beam(){
box_x = obj.position().left;
box_y = obj.position().top;
w = box_dis();
//检查边界
if (box_x == 0 && box_y == 0 || w.left < speed) {
active = 'right';
}
if (box_x == screen_x && box_y == 0 || w.top < speed) {
active = 'down';
}
if (box_x == screen_x && box_y == screen_y || w.right < speed) {
active = 'left';
}
if (box_x == 0 && box_y == screen_y || w.bottom < speed) {
active = 'up';
}
//动起来
switch (active) {
case 'left'://左
obj.css({
"left": box_x - speed
});
break;
case 'up'://上
obj.css({
"top": box_y - speed
});
break;
case 'right'://右
obj.css({
"left": box_x + speed
});
break;
case 'down'://下
obj.css({
"top": box_y + speed
});
break;
}
var is_true = collide(obj, food_obj);
if (is_true) {
var txt = parseInt(food_obj.text());
food_obj.remove();
//重新生成食物
food_obj = food();
food_obj.text(txt + 1);
is_true = false;
}
$("#footer").html("方向：" + active + "<br/>距离：left:" + w.left + "top:" + w.top + "bottom:" + w.bottom + "right:" + w.right + "<br/>坐标：x:" + box_x + "y:" + box_y);
}
</script>
</body>
</html>
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