Difference between revisions of "Sierpinski curve"
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Jump to navigationJump to searchA WASSERMANN (talk | contribs) |
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<html> | <html> | ||
| − | + | <form><textarea id="inputtext" rows=10 cols=35 wrap="off" style="width:600px;"> | |
| − | |||
| − | |||
| − | |||
| − | <form><textarea id="inputtext" rows= | ||
function halfSierpinski(s,l) { | function halfSierpinski(s,l) { | ||
if (l==0) { | if (l==0) { | ||
| Line 44: | Line 40: | ||
<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', { | + | var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-300, 300, 300, -300]}); |
| − | var t = | + | var t = brd.create('turtle'); |
function run() { | function run() { | ||
brd.suspendUpdate(); | brd.suspendUpdate(); | ||
| − | var code = | + | var code = document.getElementById('inputtext').value; |
if (code=='') { return; } | if (code=='') { return; } | ||
eval(code); | eval(code); | ||
| Line 56: | Line 52: | ||
} | } | ||
function clearturtle() { | function clearturtle() { | ||
| − | |||
t.cs(); | t.cs(); | ||
} | } | ||
run(); | run(); | ||
| − | </ | + | </jsxgraph> |
| − | |||
===References=== | ===References=== | ||
| − | * [http://en.wikipedia.org/wiki/Sierpi%C5%84ski_curve] | + | * [http://en.wikipedia.org/wiki/Sierpi%C5%84ski_curve http://en.wikipedia.org/wiki/Sierpi%C5%84ski_curve] |
===The source code=== | ===The source code=== | ||
| Line 100: | Line 94: | ||
t.cs(); | t.cs(); | ||
t.ht(); | t.ht(); | ||
| − | + | level = 3; | |
t.setPos(0,-300); | t.setPos(0,-300); | ||
| − | sierpinski(150/Math.pow(2, | + | sierpinski(150/Math.pow(2,level),level); |
</source> | </source> | ||
| Line 108: | Line 102: | ||
[[Category:Turtle Graphics]] | [[Category:Turtle Graphics]] | ||
[[Category:Fractals]] | [[Category:Fractals]] | ||
| + | [[Category:Curves]] | ||
Latest revision as of 15:34, 8 June 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);
