Difference between revisions of "Sierpinski curve"
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<html> | <html> | ||
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<form><textarea id="inputtext" rows=10 cols=35 wrap="off" style="width:600px;"> | <form><textarea id="inputtext" rows=10 cols=35 wrap="off" style="width:600px;"> | ||
function halfSierpinski(s,l) { | function halfSierpinski(s,l) { | ||
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<input type="button" value="clear" onClick="clearturtle()"> | <input type="button" value="clear" onClick="clearturtle()"> | ||
</form> | </form> | ||
| − | < | + | </html> |
| − | + | <jsxgraph width="600" height="600" box="box"> | |
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 = brd.createElement('turtle'); | var t = brd.createElement('turtle'); | ||
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} | } | ||
run(); | run(); | ||
| − | </ | + | </jsxgraph> |
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===References=== | ===References=== | ||
Revision as of 11:59, 25 March 2011
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);
