Difference between revisions of "Sierpinski curve"

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<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
<form><textarea id="inputtext" rows=3 cols=35 wrap="off" style="width:600px;">
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<form><textarea id="inputtext" rows=10 cols=35 wrap="off" style="width:600px;">
 
function halfSierpinski(s,l) {
 
function halfSierpinski(s,l) {
 
     if (l==0) {
 
     if (l==0) {
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[[Category:Turtle Graphics]]
 
[[Category:Turtle Graphics]]
 
[[Category:Fractals]]
 
[[Category:Fractals]]
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[[Category:Curves]]

Revision as of 13:05, 10 February 2009


References

The source code

function halfSierpinski(s,l) {
    if (l==0) {
       t.fd(s);
    } else {
        halfSierpinski(s,l-1);
        t.lt(45);
        t.fd(s*Math.sqrt(2));
        t.lt(45);
        halfSierpinski(s,l-1);
        t.rt(90);
        t.fd(s);
        t.rt(90);
        halfSierpinski(s,l-1);
        t.lt(45);
        t.fd(s*Math.sqrt(2));
        t.lt(45);
        halfSierpinski(s,l-1);
    }
}

function sierpinski(s,l) {
    halfSierpinski(s,l);
    t.rt(90);
    t.fd(s);
    t.rt(90);
    halfSierpinski(s,l);
    t.rt(90);
    t.fd(s);
    t.rt(90);
}
t.cs();
t.ht();
level = 3;
t.setPos(0,-300);
sierpinski(150/Math.pow(2,level),level);