Koch curve: Difference between revisions
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A WASSERMANN (talk | contribs) New page: <html> <link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" /> <script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/pro... |
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| Line 1: | Line 1: | ||
<html> | <html> | ||
<form><textarea id="inputtext" rows=10 cols=35 wrap="off" style="width:600px;"> | |||
function koch(x,level) { | |||
if (level<1) { | |||
<form><textarea id="inputtext" rows= | |||
function koch(x) { | |||
if ( | |||
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 21: | Line 17: | ||
t.cs(); | t.cs(); | ||
t.hideTurtle(); | t.hideTurtle(); | ||
t.setPos(- | t.setPos(-250,0); | ||
t.rt(90); | t.rt(90); | ||
koch( | koch(400,7); | ||
</textarea><br /> | </textarea><br /> | ||
| Line 30: | Line 26: | ||
</form> | </form> | ||
</html> | </html> | ||
<jsxgraph width="600" height="400" box="box"> | |||
< | var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-300, 300, 300, -100]}); | ||
var t = brd.create('turtle'); | |||
var brd = JXG.JSXGraph.initBoard('box', { | |||
var t = | |||
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 47: | Line 40: | ||
} | } | ||
run(); | run(); | ||
</ | </jsxgraph> | ||
===References=== | ===References=== | ||
* [http://www.mathcurve.com/fractals/koch/koch.shtml http://www.mathcurve.com/fractals/koch/koch.shtml] | |||
* [http:// | |||
===Source code=== | |||
<source lang="javascript"> | |||
var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-300, 300, 300, -100]}); | |||
var t = brd.create('turtle'); | |||
function run() { | |||
brd.suspendUpdate(); | |||
var code = document.getElementById('inputtext').value; | |||
if (code=='') { return; } | |||
eval(code); | |||
brd.unsuspendUpdate(); | |||
} | |||
function clearturtle() { | |||
t.cs(); | |||
} | |||
run(); | |||
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]] | ||
[[Category:Curves]] | |||
Latest revision as of 07:58, 8 June 2011
References
Source code
var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-300, 300, 300, -100]});
var t = brd.create('turtle');
function run() {
brd.suspendUpdate();
var code = document.getElementById('inputtext').value;
if (code=='') { return; }
eval(code);
brd.unsuspendUpdate();
}
function clearturtle() {
t.cs();
}
run();
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);
