Difference between revisions of "Koch curve"

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<html>
 
<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/jsxgraphcore.js"></script>
 
 
<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 koch(x,level) {
 
function koch(x,level) {
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<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:400px;"></div>
+
</html>
<script language="JavaScript">
+
<jsxgraph width="600" height="400" box="box">
var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1});
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var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-300, 300, 300, -100]});
var t = brd.createElement('turtle');
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var t = brd.create('turtle');
 
function run() {
 
function run() {
 
   brd.suspendUpdate();
 
   brd.suspendUpdate();
   var code = $('inputtext').value;
+
   var code = document.getElementById('inputtext').value;
 
   if (code=='') { return; }
 
   if (code=='') { return; }
 
   eval(code);
 
   eval(code);
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}
 
}
 
run();
 
run();
</script>
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</jsxgraph>
</html>
 
  
 
===References===
 
===References===
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===Source code===
 
===Source code===
 
<source lang="javascript">
 
<source lang="javascript">
var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1});
+
var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-300, 300, 300, -100]});
var t = brd.createElement('turtle');
+
var t = brd.create('turtle');
 
function run() {
 
function run() {
 
   brd.suspendUpdate();
 
   brd.suspendUpdate();
   var code = $('inputtext').value;
+
   var code = document.getElementById('inputtext').value;
 
   if (code=='') { return; }
 
   if (code=='') { return; }
 
   eval(code);
 
   eval(code);
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         t.fd(x);
 
         t.fd(x);
 
     } else {
 
     } else {
         koch(x/3,level-1);<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
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         koch(x/3,level-1);
  
 
         t.lt(60);
 
         t.lt(60);
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</source>
 
</source>
  
[[Category:Examples]]<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
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[[Category:Examples]]
  
 
[[Category:Turtle Graphics]]
 
[[Category:Turtle Graphics]]
 
[[Category:Fractals]]
 
[[Category:Fractals]]
 
[[Category:Curves]]
 
[[Category:Curves]]

Latest revision as of 08:58, 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);