Difference between revisions of "Koch curve"
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Jump to navigationJump to searchA WASSERMANN (talk | contribs) |
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| Line 1: | Line 1: | ||
<html> | <html> | ||
| − | + | <form><textarea id="inputtext" rows=10 cols=35 wrap="off" style="width:600px;"> | |
| − | |||
| − | |||
| − | |||
| − | <form><textarea id="inputtext" rows= | ||
function koch(x,level) { | function koch(x,level) { | ||
if (level<1) { | if (level<1) { | ||
| Line 29: | Line 25: | ||
<input type="button" value="clear" onClick="clearturtle()"> | <input type="button" value="clear" onClick="clearturtle()"> | ||
</form> | </form> | ||
| − | < | + | </html> |
| − | + | <jsxgraph width="600" height="400" box="box"> | |
| − | var brd = JXG.JSXGraph.initBoard('box', { | + | var brd = JXG.JSXGraph.initBoard('box', {boundingbox: [-300, 300, 300, -100]}); |
| − | var t = | + | var t = brd.create('turtle'); |
function run() { | function run() { | ||
brd.suspendUpdate(); | brd.suspendUpdate(); | ||
| − | var code = | + | var code = document.getElementById('inputtext').value; |
if (code=='') { return; } | if (code=='') { return; } | ||
eval(code); | eval(code); | ||
| Line 44: | Line 40: | ||
} | } | ||
run(); | run(); | ||
| − | </ | + | </jsxgraph> |
| − | |||
===References=== | ===References=== | ||
| Line 52: | Line 47: | ||
===Source code=== | ===Source code=== | ||
<source lang="javascript"> | <source lang="javascript"> | ||
| + | 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) { | function koch(x,level) { | ||
if (level<1) { | if (level<1) { | ||
| Line 57: | Line 66: | ||
} else { | } else { | ||
koch(x/3,level-1); | koch(x/3,level-1); | ||
| + | |||
t.lt(60); | t.lt(60); | ||
koch(x/3,level-1); | koch(x/3,level-1); | ||
| Line 74: | Line 84: | ||
[[Category:Examples]] | [[Category:Examples]] | ||
| + | |||
[[Category:Turtle Graphics]] | [[Category:Turtle Graphics]] | ||
[[Category:Fractals]] | [[Category:Fractals]] | ||
| + | [[Category:Curves]] | ||
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);
