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 21:22, 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);
