Sierpinski curve: Difference between revisions
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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;"> | <form><textarea id="inputtext" rows=3 cols=35 wrap="off" style="width:600px;"> | ||
function halfSierpinski(s,l) { | function halfSierpinski(s,l) { | ||
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<script language="JavaScript"> | <script language="JavaScript"> | ||
var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1}); | var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1}); | ||
var t = | var t = brd.createElement('turtle'); | ||
function run() { | function run() { | ||
brd.suspendUpdate(); | brd.suspendUpdate(); | ||
Revision as of 15:16, 21 January 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);
