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。