Difference between revisions of "Koch curve"

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Line 27: Line 27:
 
</html>
 
</html>
 
<jsxgraph width="600" height="400" box="box">
 
<jsxgraph width="600" height="400" box="box">
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.create('turtle');
 
var t = brd.create('turtle');
 
function run() {
 
function run() {
Line 47: Line 47:
 
===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.create('turtle');
 
var t = brd.create('turtle');
 
function run() {
 
function run() {

Latest revision as of 09:58, 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);