<html>
<head>
<style>
div
{
position: absolute
width:100px
height:100px
border-radius: 50%
background:red
animation:myfirst 5s
background:-moz-linear-gradient(top, red, rgba(0, 0, 255, 0.5))
background:-webkit-gradient(linear, 0 0, 0 bottom, from(#ff0000), to(rgba(0, 0, 255, 0.5)))
background:-o-linear-gradient(top, red, rgba(0, 0, 255, 0.5))
-moz-animation:myfirst 10s/* Firefox */
-webkit-animation:myfirst 10s/* Safari and Chrome */
-o-animation:myfirst 10s/* Opera */
}
@keyframes myfirst
{
from {left:0transform:rotate(0deg)}
to {left:1000pxtransform:rotate(360deg)}
}
@-webkit-keyframes myfirst /* Safari and Chrome */
{
from {left:0transform:rotate(0deg)}
to {left:1000pxtransform:rotate(360deg)}
}
</style>
</head>
<body style="position: relative">
<div></div>
</body>
</html>
您好，可以先画一个有立体感的球体，或者直接网上找个图片，然后给这个球体添加动画，选择强调里的陀螺旋，在效果选项里将重复次数自行设定，就可以实现让球体在地上滚动的效果。同时还可借助在图片上覆盖诸如半透明灰色和半透明白色的圆形形状来实现球体高光的视觉错觉，让滚动显得更加真实。当然，如果像前面的人所说的地球自转，我没想到实现办法。不过说回来，PPT本身只是个平面软件，所以只能靠一系列平面的视觉错觉来营造一种立体感。不知道这合不合你意，，不过你这个要求，，可以搜索一下一些JQUERY效果，， <html><head>
<title>图片环形滚动</title>
<style>
html,body{background:#990000margin:0px }
#pics_3d{
position:absolute
height:300px
width:100%
background:#000
top:120px
border-bottom:20px solid #420000
border-top:20px solid #420000
}
img{
position:absolute
background:#eee
left:0top:0
border:5px solid #00CCFF
}
</style>
</head>
<body>
<div id="pics_3d">
<img src="/jscss/demoimg/wall5.jpg" />
<img src="/jscss/demoimg/wall6.jpg" />
<img src="/jscss/demoimg/wall7.jpg" />
</div>
</body>
<script >
Item=function(UI){
this.angle=0
this.UI=UI
this.update()
}
Item.ini={
axle_w:400,
axle_h:10,
cen_x:500,
cen_y:260
}
Item.prototype.update=function(){
var J=this.UI.style,C=Item.ini,W=C.axle_w,H=C.axle_h,X=C.cen_x,Y=C.cen_y
var angle=this.angle/180*Math.PI
var left=Math.cos(angle)*W+X
var top=Math.sin(angle)*H+Y
var A=this.angle>270?this.angle-360:this.angle
var size=360-Math.abs(90-A)*3
this.UI.width=Math.max(size,120)
var opacity=Math.max(10,size-180)
J.filter='alpha(opacity='+opacity+')'
J.opacity=opacity/100
J.left=(left-this.UI.offsetWidth/2)+'px'
top=(top-this.UI.offsetHeight)+'px'
J.top=top
J.zIndex=parseInt(size*100)
}
Nav_3D={
items:[],
dir:1,
index:0,
hover:false,
add:function(item){
this.items.push(item)
item.index=this.items.length-1
item.UI.onclick=function (){
var J=item.angle,M=Nav_3D
if(M.uping)return
if(J==90){
return alert('goto new url..')
}
M.wheel_90(item)
M.index=item.index
}
item.UI.onmouseover=function (){
if(item.angle==90){
Nav_3D.hover=true
clearTimeout(Nav_3D.autoTimer)
}
}
item.UI.onmouseout=function (){
if(item.angle==90){
Nav_3D.hover=false
Nav_3D.auto()
}
}
return this
},
wheel_90:function(hot){
if(this.uping)return
this.uping=true
var This=this
this.timer=setInterval(function (){
clearTimeout(This.autoTimer)
var A=hot.angle
This.dir=A<270&&A>90?-1:1
if(A==90){
clearInterval(This.timer)
This.uping=false
This.onEnd(hot)
}
if(A>270)A-=360
var set=Math.ceil(Math.abs((90-A)*0.1))
for (var i=0i<This.items.lengthi++ ) {
var J=This.items[i]
J.angle+= (set*This.dir)
J.update()
if(J.angle>360)J.angle-=360
if(J.angle<0)J.angle +=360
}
},15)
},
ready:function(){
var J=this.items,step=parseInt(360/J.length)
for (var i=0i<J.lengthi++) {J[i].angle=i*step+90}
this.wheel_90(this.items[0])
Nav_3D.prevHot=this.items[0].UI
Nav_3D.setHot()
},
setHot:function(isHot){
if(!this.prevHot)return
with(this.prevHot.style){
borderColor=isHot!==false?'#CC0000':'#00CCFF'
cursor=isHot!==false?'default':"pointer"
}
return this
},
auto:function(){
this.index--
if(this.index<0)this.index=this.items.length-1
var J=this.items[this.index]
this.setHot(false).prevHot=J.UI
this.setHot()
this.wheel_90(J)
},
onEnd:function(hot){
if(this.hover){
return setTimeout(function(){Nav_3D.onEnd()},100)
}
this.autoTimer=setTimeout(function(){Nav_3D.auto()},1500)
}
}
var imgs=document.getElementById("pics_3d").getElementsByTagName("IMG")
for (var i=0i<imgs.lengthi++ ) {
Nav_3D.add(new Item(imgs[i]))
}
Nav_3D.ready()
</script>
</html>
