Difference between revisions of "Programming turtle graphics"

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Line 4: Line 4:
 
<html>
 
<html>
 
<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
 
<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
 
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
 
<form><textarea id="inputtext" rows=5 cols=35 wrap="off" style="width:600px;">t.fd(100);</textarea><br />
 
<form><textarea id="inputtext" rows=5 cols=35 wrap="off" style="width:600px;">t.fd(100);</textarea><br />
Line 20: Line 19:
 
function run() {
 
function run() {
 
   brd.suspendUpdate();
 
   brd.suspendUpdate();
   var code = $('inputtext').value;
+
   var code = document.getElementById('inputtext').value;
 
   if (code=='') { return; }
 
   if (code=='') { return; }
 
   eval(code);
 
   eval(code);
   $('logwindow').innerHTML += code+'\n';
+
   document.getElementById('logwindow').innerHTML += code+'\n';
   //$('inputtext').value = '';
+
   //document.getElementById('inputtext').value = '';
 
   brd.unsuspendUpdate();
 
   brd.unsuspendUpdate();
 
}
 
}
 
function clearturtle() {
 
function clearturtle() {
 
   t.cs();
 
   t.cs();
   //$('inputtext').value = 't.fd(100);';
+
   //document.getElementById('inputtext').value = 't.fd(100);';
 
}
 
}
 
function clearlog() {
 
function clearlog() {
   $('logwindow').innerHTML = '';
+
   document.getElementById('logwindow').innerHTML = '';
 
}
 
}
 
</script>
 
</script>
Line 59: Line 58:
 
function run() {
 
function run() {
 
   brd.suspendUpdate();
 
   brd.suspendUpdate();
   var code = $('inputtext').value;
+
   var code = document.getElementById('inputtext').value;
 
   if (code=='') { return; }
 
   if (code=='') { return; }
 
   eval(code);
 
   eval(code);
   $('logwindow').innerHTML += code+'\n';
+
   document.getElementById('logwindow').innerHTML += code+'\n';
   //$('inputtext').value = '';
+
   //document.getElementById('inputtext').value = '';
 
   brd.unsuspendUpdate();
 
   brd.unsuspendUpdate();
 
}
 
}
 
function clearturtle() {
 
function clearturtle() {
 
   t.cs();
 
   t.cs();
   //$('inputtext').value = 't.fd(100);';
+
   //document.getElementById('inputtext').value = 't.fd(100);';
 
}
 
}
 
function clearlog() {
 
function clearlog() {
   $('logwindow').innerHTML = '';
+
   document.getElementById('logwindow').innerHTML = '';
 
}
 
}
 
</script>
 
</script>

Revision as of 19:23, 29 October 2009

Input


Output

Log window



Source code

<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
<form><textarea id="inputtext" rows=3 cols=35 wrap="off" style="width:600px;">t.fd(100);</textarea><br />
<input type="button" value="run" onClick="run()">
<input type="button" value="clear" onClick="clearturtle()">
<input type="button" value="clear log" onClick="clearlog()">
</form>
<div id="box" class="jxgbox" style="width:600px; height:600px;"></div>
<pre id="logwindow" class="javascript javascript" style="font-family:monospace;"></pre>
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 = document.getElementById('inputtext').value;
  if (code=='') { return; }
  eval(code);
  document.getElementById('logwindow').innerHTML += code+'\n';
  //document.getElementById('inputtext').value = '';
  brd.unsuspendUpdate();
}
function clearturtle() {
  t.cs();
  //document.getElementById('inputtext').value = 't.fd(100);';
}
function clearlog() {
  document.getElementById('logwindow').innerHTML = '';
}
</script>