精彩：JS画的图形[Good篇]

王朝vc·作者佚名 2006-01-08

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<!--

如果您想在线看看效果：http://m9m.nease.net/test/2.htm

-->

<head>

</head>

<STYLE>

v\:* { BEHAVIOR: url(#default#VML) }

</STYLE>

<body>

<v:group ID="group1"

style="position:relative;WIDTH:800px;HEIGHT:600px;top:0;left:0;"

CoordOrig="-500,-500" coordsize="1000,1000">

<v:RoundRect style="position:relative;z-index:1;left:-600px;top:-

580;width:1100px;height:1100px" fillcolor="#cccccc">

<v:shadow on="T" type="single" color="#b3b3b3" offset="5px,5px"/>

</v:RoundRect>

function line(x, y, x1, y1, n)

{

document.write("<v:line from=\"" + (x - n) + "," + y + "\" to=\"" +

(x1 - n) + "," + y1 + "\" style=\"position:relative;top:-80;left:-50;z

-index:9999;\" strokeweight=\"1pt\"></v:line>");

// StrokeColor=Rgb(\"" + Math.round(Math.random() * 255 ) + "," +

Math.round(Math.random() * 255) + "," + Math.round(Math.random() * 255

) +")

}

var i, j, a;

var length = 1000; // 方块边长

var n = 60, theta = 3; // 每个方块里画子方块的个数，偏移角度值

var x = 300, y = 300; // 原始坐标位置

var py = 800; // x 偏移值

function polygonc(x0, y0, r, n, af)

{

var x, y, xs, ys, i, dtheta, theta;

if(n < 3)return;

dtheta = 6.28318 / n;

theta = af * 0.0174533;

xs = x0 + r * Math.cos(theta);

ys = y0 + r * Math.sin(theta);

var xo = xs, yo = ys;

for ( i = 1; i < n; i++)

{

theta += dtheta;

x = x0 + r * Math.cos(theta);

y = y0 + r * Math.sin(theta);

line(xs, ys, x, y, py);

xs = x;

ys = y;

}

line(xs, ys, xo, yo, py);

}

function block(x, y, a, n, theta)

{

var x0, y0, i, r, t, f, af = 45;

t = Math.abs(theta * 0.0174533);

f = 1 / (Math.cos(t) + Math.sin(t));

r = a / 1.414;

x0 = x + 0.5 * a;

y0 = y + 0.5 * a;

for (i = 1; i <= n; i++)

{

polygonc(x0, y0, r, 4, af);

r = r * f;

af -= theta;

}

a = length /4;

for (i = 1; i <= 4; i++)

{

for (j = 1; j <= 4; j++)

{

block(x, y, a, n, theta);

theta = 0 - theta;

x += a;

}

x = 300;

y -= a;

theta = 0 - theta

}

</script>

</v:group>

</body>

</html>