Difference between revisions of "Koch curve"
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<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxturtle.js"></script> | <script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxturtle.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 koch(x) { | + | function koch(x,level) { |
| − | if ( | + | if (level<1) { |
t.fd(x); | t.fd(x); | ||
} else { | } else { | ||
| − | koch(x/3); | + | koch(x/3,level-1); |
t.lt(60); | t.lt(60); | ||
| − | koch(x/3); | + | koch(x/3,level-1); |
t.rt(120); | t.rt(120); | ||
| − | koch(x/3); | + | koch(x/3,level-1); |
t.lt(60); | t.lt(60); | ||
| − | koch(x/3); | + | koch(x/3,level-1); |
} | } | ||
} | } | ||
| Line 23: | Line 23: | ||
t.setPos(-250,0); | t.setPos(-250,0); | ||
t.rt(90); | t.rt(90); | ||
| − | koch(400); | + | koch(400,7); |
</textarea><br /> | </textarea><br /> | ||
| Line 29: | Line 29: | ||
<input type="button" value="clear" onClick="clearturtle()"> | <input type="button" value="clear" onClick="clearturtle()"> | ||
</form> | </form> | ||
| − | |||
| − | |||
| − | |||
<div id="box" class="jxgbox" style="width:600px; height:600px;"></div> | <div id="box" class="jxgbox" style="width:600px; height:600px;"></div> | ||
<script language="JavaScript"> | <script language="JavaScript"> | ||
| Line 52: | Line 49: | ||
===References=== | ===References=== | ||
This example is from | This example is from | ||
| − | * [http:// | + | * [http://www.mathcurve.com/fractals/koch/koch.shtml http://www.mathcurve.com/fractals/koch/koch.shtml] |
| + | |||
| + | ===Source code=== | ||
| + | <source lang="javascript"> | ||
| + | function koch(x,level) { | ||
| + | if (level<1) { | ||
| + | t.fd(x); | ||
| + | } else { | ||
| + | koch(x/3,level-1); | ||
| + | t.lt(60); | ||
| + | koch(x/3,level-1); | ||
| + | t.rt(120); | ||
| + | koch(x/3,level-1); | ||
| + | t.lt(60); | ||
| + | koch(x/3,level-1); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | t.cs(); | ||
| + | t.hideTurtle(); | ||
| + | t.setPos(-250,0); | ||
| + | t.rt(90); | ||
| + | koch(400,7); | ||
| + | </source> | ||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Turtle Graphics]] | [[Category:Turtle Graphics]] | ||
[[Category:Fractals]] | [[Category:Fractals]] | ||
Revision as of 17:02, 21 December 2008
References
This example is from
Source code
function koch(x,level) {
if (level<1) {
t.fd(x);
} else {
koch(x/3,level-1);
t.lt(60);
koch(x/3,level-1);
t.rt(120);
koch(x/3,level-1);
t.lt(60);
koch(x/3,level-1);
}
}
t.cs();
t.hideTurtle();
t.setPos(-250,0);
t.rt(90);
koch(400,7);
