圣诞节又到了，作为程序猿的我用代码给女朋友送了一个礼物

圣诞节又到了，拿什么来哄女朋友开心？

我们先来做一个简单的雪人动画：

项目结构：

html:

<!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>CSS3圣诞树雪人下雪动画效果</title><style type="text/css">  
body{margin:0;padding:0;list-style-type:none;}  
.header{margin: 0 0 30px;background: url(css/img/header-bg.png);background: url(css/img/snow-bg.png) repeat-y center, url(css/img/header-bg.png);-webkit-animation: animate-snow 9s linear infinite;-moz-animation: animate-snow 9s linear infinite;-ms-animation: animate-snow 9s linear infinite;animation: animate-snow 9s linear infinite;    
}@-webkit-keyframes animate-snow
{0% { background-position: center 0, 0 0;}100% { background-position: center 885px, 0 0;}
}@-moz-keyframes animate-snow
{0% { background-position: center 0, 0 0;}100% { background-position: center 885px, 0 0;}
}@-ms-keyframes animate-snow
{0% { background-position: center 0, 0 0;}100% { background-position: center 885px, 0 0;}
}    @keyframes animate-snow
{0% { background-position: center 0, 0 0;}100% { background-position: center 885px, 0 0;}
}  .wrapper{ width: 960px; height: 315px; margin: auto; overflow: hidden; position: relative; background-image: url(css/img/wrapper-bg.png); background-repeat: no-repeat; background-position: bottom;    }  @-moz-keyframes animate-drop {0% {opacity:0;-moz-transform: translate(0, -315px);}100% {opacity:1;-moz-transform: translate(0, 0);}
}@-webkit-keyframes animate-drop {0% {opacity:0;-webkit-transform: translate(0, -315px);}100% {opacity:1;-webkit-transform: translate(0, 0);}
}@-ms-keyframes animate-drop {0% {opacity:0;-ms-transform: translate(0, -315px);}100% {opacity:1;-ms-transform: translate(0, 0);}
}@keyframes animate-drop {0% {opacity:0;transform: translate(0, -315px);}100% {opacity:1;transform: translate(0, 0);}
}    .christmas-tree, .snowman {position: absolute;-moz-animation: animate-drop 1s linear;-webkit-animation: animate-drop 1s linear;-ms-animation: animate-drop 1s linear;animation: animate-drop 1s linear;
}.christmas-tree {width: 112px;height: 137px;background: url(css/img/christmas-tree.png);
}.snowman {width: 115px;height: 103px;top: 195px;left: 415px;background: url(css/img/snowman.png);-moz-animation-duration: .6s;-webkit-animation-duration: .6s;-ms-animation-duration: .6s;animation-duration: .6s;
}  .tree1 {top: 165px;left: 35px;-moz-animation-duration: .6s;-webkit-animation-duration: .6s;-ms-animation-duration: .6s;animation-duration: .6s;    
}.tree2 {left: 185px;top: 175px;  -moz-animation-duration: .9s;-webkit-animation-duration: .9s;-ms-animation-duration: .9s;animation-duration: .9s;    
}.tree3 {left: 340px;top: 125px;  -moz-animation-duration: .7s;-webkit-animation-duration: .7s;-ms-animation-duration: .7s;animation-duration: .7s;    
}.tree4 {left: 555px;top: 155px;  -moz-animation-duration: .8s;-webkit-animation-duration: .8s;-ms-animation-duration: .8s;animation-duration: .8s;    
}.tree5 {left: 710px;top: 170px;  -moz-animation-duration: .7s;-webkit-animation-duration: .7s;-ms-animation-duration: .7s;animation-duration: .7s;    
}.tree6 {left: 855px;top: 125px;  -moz-animation-duration: .6s;-webkit-animation-duration: .6s;-ms-animation-duration: .6s;animation-duration: .6s;    
}  
</style></head><body><div class="header"><div class="wrapper"><div class="christmas-tree tree1"></div><div class="christmas-tree tree2"></div><div class="christmas-tree tree3"></div><div class="snowman"></div>  <div class="christmas-tree tree4"></div><div class="christmas-tree tree5"></div><div class="christmas-tree tree6"></div></div>
</div>
<div style="text-align:center;">
<p>来源:<a href="sunmenglei.blog.csdn.net" target="_blank">孙叫兽的博客</a></p>
</div>
<script src="http://down.admin5.comjs/tongji.js"></script>
<script src="http://down.admin5.comjs/youxia.js" type="text/javascript"></script>
</body>
</html>

图片下载地址：
https://download.csdn.net/download/weixin_41937552/13786683

效果图：

这样就完成了在HTML中使用css3实现雪人动画效果。

下面我们玩一个比较有特色的圣诞树。

圣诞节虽然不是中国的传统节日，但当下很多时髦的年轻人却很喜欢过这个欢乐的节日，并乐于打造参与属于这个节日的仪式感。

除了所知的圣诞老人、圣诞树、互送礼物、吃大餐等传统习俗外，其实程序员能为今天的节日增加一些特别的环节。

圣诞树下载：

https://download.csdn.net/download/weixin_41937552/13780446

我们把下载的压缩包解压，把exe文件放到桌面，双击打开即可。

桌面效果图：

可以打开多个圣诞树，如果关闭圣诞树需要鼠标右键点击exit即可。

代码如下：

<!DOCTYPE HEML PUBLIC>
<html>
<head>
<meta charset="utf-8">
<style>
html, body
{width: 100%;height: 100%;margin: 0;padding: 0;border: 0;}div
{
margin: 0;
padding: 0;
border: 0;
}
.nav
{
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 27px;
background-color: white;                   color: black;
text-align: center;
line-height: 25px;
}
a
{
color: black;
text-decoration: none;
border-bottom: 1px dashed black;
}
a:hover
{
border-bottom: 1px solid red;
}
.previous
{
float: left;
margin-left: 10px;
}
.next
{
float: right;
margin-right: 10px;
}
.green
{
color: green;
}
.red
{
color: red;
}
textarea
{
width: 100%;
height: 100%;
border: 0;                
padding: 0;                
margin: 0;                
padding-bottom: 20px;                
}            
.block-outer            
{                
float: left;                
width: 22%;                
height: 100%;                
padding: 5px;                
border-left: 1px solid black;                
margin: 30px 3px 3px 3px;                
}            
.block-inner            
{                
height: 68%;                
}            
.one            
{                
border: 0;                
}
</style>      
</head>      
<body marginwidth="0" marginheight="0">
<canvas id="c" height="356" width="446">
<script>              
var collapsed = true;            
function toggle()            
{                  
var fs = top.document.getElementsByTagName('frameset')[0];                
var f = fs.getElementsByTagName('frame');                
if (collapsed)                
{                      
fs.rows = '250px,*';                    
fs.noResize = false;                    
f[0].noResize = false;                      
f[1].noResize = false;                  
}                 
else                
{                      
fs.rows = '30px,*';                    
fs.noResize = true;                      
f[0].noResize = true;                    
f[1].noResize = true;                
}                  
collapsed = !collapsed;            
}      
</script>  
<script>              
var b = document.body;            
var c = document.getElementsByTagName('canvas')[0];            
var a = c.getContext('2d');            
document.body.clientWidth;
</script>  
<script>
M=Math;
Q=M.random;J=[];
U=16;
T=M.sin;
E=M.sqrt;
for(O=k=0;x=z=j=i=k<200;)
with(M[k]=k?c.cloneNode(0):c)
{    
width=height=k?32:W=446;        
with(getContext('2d'))        
if(k>10|!k)        
for(        
font='60px Impact',        
V='rgba(';I=i*U,fillStyle=k?k==13?V+'205,205,215,.15)':        
V+(147+I)+','+(k%2?128+I:0)+','+I+',.5)':'#cca',i<7;        
)    
beginPath(        
fill(            
arc(                
U-i/3,                
24-i/2,                
k==13?4-(i++)/2:8-i++,                
0,                
M.PI*2,1                
)            
)            
);
else for(;
x=T(i),        
y=Q()*2-1,        
D=x*x+y*y,        
B=E(D-x/.9-1.5*y+1),        
R=67*(B+1)*(L=k/9+.8)>>1,        
i++<W;        
)
if(D<1)    
beginPath(        
strokeStyle=V+R+','+(R+B*L>>0)+',40,.1)'        
),        
moveTo(U+x*8,U+y*8),        
lineTo(U+x*U,U+y*U),        
stroke();
for(        
y=H=k+E(k++)*25,        
R=Q()*W;        
P=3,j<H;        
)    
J[O++]=[x+=T(R)*P+Q()*6-3,y+=Q()*U-8,z+=T(R-11)*P+Q()*6-3,j/H*20+((j+=U)>H&Q()>.8?Q(P=9)*4:0)>>1]
}
setInterval(function G(m,l)
{    
A=T(D-11);    
if(l)
return(        
m[2]-l[2])*A+(l[0]-m[0])*T(D);        
a.clearRect(0,0,W,W);        
J.sort(G);
for(        
i=0;        
L=J[i++];        
a.drawImage        
(            
M[L[3]+1],207+L[0]*A+L[2]*T(D)>>0,L[1]>>1)    )    
{        
if(i==2e3)        
a.fillText        
(            
'Happy Christmas!',            
U,345);
if(!(i%7))        
a.drawImage        
(            
M[13],
((157*(i*i)+T(D*5+i*i)*5)%W)>>0,            
((113*i+(D*i)/60)%(290+i/99))>>0            
);    
}    
D+=.02
},1)
</script>
</body>
</html>

好啦，本期内容就介绍到这里，我们下期见！