Difference between revisions of "Koch curve"

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Line 51: Line 51:
 
===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 t = brd.createElement('turtle');
 +
function run() {
 +
  brd.suspendUpdate();
 +
  var code = $('inputtext').value;
 +
  if (code=='') { return; }
 +
  eval(code);
 +
  brd.unsuspendUpdate();
 +
}
 +
function clearturtle() {
 +
  t.cs();
 +
}
 +
run();
 +
 
function koch(x,level) {
 
function koch(x,level) {
 
     if (level<1) {
 
     if (level<1) {

Revision as of 20:22, 2 July 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 = $('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);