Difference between revisions of "Turtle spiral"
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Jump to navigationJump to searchA WASSERMANN (talk | contribs) |
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| (8 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
<html> | <html> | ||
| − | <form><textarea id="inputtext" rows=5 cols=35 wrap="off" style="width:600px;">for (var i=0;i< | + | <form><textarea id="inputtext" rows=5 cols=35 wrap="off" style="width:600px;">for (var i=0;i<100;i++){ |
| − | t.forward(i* | + | t.forward(i*3); |
t.left(71); | t.left(71); | ||
} | } | ||
| Line 11: | Line 11: | ||
<jsxgraph width="600" height="600"> | <jsxgraph width="600" height="600"> | ||
| − | var brd = JXG.JSXGraph.initBoard('jxgbox', { | + | var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-300, 300, 300, -300]}); |
| − | var t = brd. | + | 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 24: | Line 24: | ||
t.cs(); | t.cs(); | ||
} | } | ||
| + | run(); | ||
</jsxgraph> | </jsxgraph> | ||
===Source code=== | ===Source code=== | ||
| − | <source lang=" | + | <source lang="javascript"> |
| − | + | var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-300, 300, 300, -300]}); | |
| − | var brd = JXG.JSXGraph.initBoard('jxgbox', { | + | var t = brd.create('turtle'); |
| − | var t = brd. | ||
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 42: | Line 42: | ||
t.cs(); | t.cs(); | ||
} | } | ||
| − | + | run(); | |
</source> | </source> | ||
| Line 48: | Line 48: | ||
===External links=== | ===External links=== | ||
| − | * [http://www.geogebra.org/de/wiki/index.php/Turtlegrafik | + | * [http://www.geogebra.org/de/wiki/index.php/Turtlegrafik A similar construction with GeoGebra] |
* [http://wiki.zum.de/Turtle-Grafik ZUM-Wiki's Turtle graphics page] | * [http://wiki.zum.de/Turtle-Grafik ZUM-Wiki's Turtle graphics page] | ||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Turtle Graphics]] | [[Category:Turtle Graphics]] | ||
Latest revision as of 09:41, 9 June 2011
Source code
var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-300, 300, 300, -300]});
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();
- Hints how to "Slow the turtle down"
