n(n>>2)幅图片轮换擦洗显示

一般的做法，只能显示两张图片，因为Wipe擦洗技术限制只能两张图片间切换花。 但可以通过将两张图片转为动画交替显示

<script> 
var i=0,pictures=new Array();//设置图片数组，图片数为奇数 
var picbase=""; 
pictures[i++]="1.gif" 
pictures[i++]="2.gif" 
pictures[i++]="3.gif" 
pictures[i++]="4.gif" 
pictures[i++]="5.gif" 
pictures[i++]="6.gif" 
pictures[i++]="7.gif" 
pictures[i++]="8.gif" 
pictures[i++]="9.gif" 
pictures[i++]="10.gif" 
pictures[i++]="11.gif" 
pictures[i++]="12.gif" 
pictures[i++]="13.gif" 
pictures[i++]="14.gif" 
pictures[i++]="15.gif" 
pictures[i++]="16.gif" 
pictures[i++]="17.gif" 
pictures[i++]="18.gif" 
pictures[i++]="19.gif" 
pictures[i++]="20.gif" 
pictures[i++]="21.gif" 
pictures[i++]="22.gif" 
var picturewidth=400//图片宽度 
var pictureheight=290//图片高度 
var delay=1//延迟时间 
</script> 
<script> 
if (document.all) { 
document.write('<OBJECT ID="DAControl_Wipe" ') 
document.write('STYLE="width:'+picturewidth+';height:'+pictureheight+'"') 
document.write('CLASSID="CLSID:B6FFC24C-7E13-11D0-9B47-00C04FC2F51D">') 
document.write('</OBJECT>') 
m = DAControl_Wipe.MeterLibrary;

whatTransformation = new ActiveXObject("DXImageTransform.Microsoft.Wipe"); 
whatTransformation.GradientSize = 1.0;//设置渐变度 
whatTransformation.WipeStyle = 0;//设置擦洗类型

var myArr=new Array(),myArr2=new Array(); 
var len=Math.floor(pictures.length/2);//将图片分成两组 
for(var i=0;i<len;i++){ 
myArr[i]=m.ImportImage(picbase+pictures[2*i]) 
myArr2[i]=m.ImportImage(picbase+pictures[2*i+1]) 
} 
if(pictures[2*i]) 
myArr[i]=m.ImportImage(picbase+pictures[2*i]) 
else 
myArr[i]=m.ImportImage(picbase+pictures[0]) ; 
myArr=m.Array(myArr) 
myArr2=m.Array(myArr2) 
Index = m.Interpolate(0.5,len+0.5,len*2*delay).RepeatForever(); 
Index2 = m.Interpolate(0,len,len*2*delay).RepeatForever(); 
//交错运行半个时间单元 
var whatPictures=new Array(); 
whatPictures[0] = myArr.NthAnim(Index); 
whatPictures[1] = myArr2.NthAnim(Index2);

forward = m.Interpolate(0, 1, delay); 
back = m.Interpolate(1, 0, delay); 
whatMovement = m.Sequence(forward, back).RepeatForever(); 
//设置参数方向

theResult = m.ApplyDXTransform( whatTransformation, whatPictures, whatMovement ); 
DAControl_Wipe.Image = theResult.OutputBvr;//设置显示图形 
DAControl_Wipe.Start();//开始 
} 
</script>

使用的技巧区别于以往的主要在将图片交替转为两个数组，利用内部计数Interpolate和NthAnim技术实现动画。