Difference between revisions of "Koch curve"

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Line 68: Line 68:
 
         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>
+
         koch(x/3,level-1);
  
 
         t.lt(60);
 
         t.lt(60);
Line 86: Line 86:
 
</source>
 
</source>
  
[[Category:Examples]]<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
+
[[Category:Examples]]
  
 
[[Category:Turtle Graphics]]
 
[[Category:Turtle Graphics]]
 
[[Category:Fractals]]
 
[[Category:Fractals]]
 
[[Category:Curves]]
 
[[Category:Curves]]

Revision as of 15:22, 30 October 2009


References

Source code

var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1});
var t = brd.createElement('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);