Difference between revisions of "Programming turtle graphics"

From JSXGraph Wiki
Jump to navigationJump to search
(New page: ===List of available commands=== There is a predefined turtle object ''t''. Therefore, all commands start with ''t'', like ''t.fd(100)''; * t.forward(len); or t.fd(len); * t.back(len); or ...)
 
Line 23: Line 23:
 
<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>
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxturtle.js"></script>
 
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxturtle.js"></script>
 +
<form><textarea id="input" rows=3 cols=35 wrap="off" style="width:600px; float:left;">
 +
</textarea>
 +
<input type="button" value="run" onClick="run()">
 +
</form>
 
<div id="box" class="jxgbox" style="width:600px; height:600px;"></div>
 
<div id="box" class="jxgbox" style="width:600px; height:600px;"></div>
 
<script language="JavaScript">
 
<script language="JavaScript">
 
var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1});
 
var brd = JXG.JSXGraph.initBoard('box', {originX: 300, originY: 300, unitX: 1, unitY: 1});
 
var t = new JSXTurtleObj(brd);
 
var t = new JSXTurtleObj(brd);
function run(nr) {
+
function run() {
 
   brd.suspendUpdate();
 
   brd.suspendUpdate();
   eval($('input'+nr).value);
+
   eval($('input').value);
 
   brd.unsuspendUpdate();
 
   brd.unsuspendUpdate();
 
}
 
}
 
</script>
 
</script>
 
</html>
 
</html>

Revision as of 11:23, 21 December 2008

List of available commands

There is a predefined turtle object t. Therefore, all commands start with t, like t.fd(100);

  • t.forward(len); or t.fd(len);
  • t.back(len); or t.bk(len);
  • t.right(angle); or t.rt(angle); ([math]0\leq angle \leq 360[/math])
  • t.left(angle); or t.lt(angle);
  • t.penUp(); or t.pu();
  • t.penDown(); or t.pd();
  • t.clearScreen(); or t.cs();
  • t.clean();
  • t.setPos(x,y);
  • t.home();
  • t.hideTurtle(); or t.ht();
  • t.showTurtle(); or t.st();
  • t.setPenSize(size); (size: number)
  • t.setPenColor(col); (col: colorString, e.g. 'red' or '#ff0000')

Interaction