Slow the turtle down: Difference between revisions

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This is an example, where the turtle speed is controlled by the setTimeout() method
of JavaScript.
<html>
<form><input type="button" value="run" onclick="run(100)"></form>
</html>
<jsxgraph width="500" height="500">
<jsxgraph width="500" height="500">
var brd = JXG.JSXGraph.initBoard('jxgbox',{unitX:1, unitY:1, originX:250, originY:250});
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox: [-250, 250, 250, -250]});
var t = brd.createElement('turtle');
var t = brd.create('turtle',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
t.setPenSize(3);


function run(n) {
  if (n>0) {
    t.fd(20);
    t.lt(90*(1-n/100));
    var st = 'run(' + (n-1) + ')';
    setTimeout(st,25);
  }
}
</jsxgraph>
</jsxgraph>
<source lang="javascript">
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox: [-250, 250, 250, -250]});
var t = brd.create('turtle',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
t.setPenSize(3);
function run(n) {
  if (n>0) {
    t.fd(20);
    t.lt(90*(1-n/100));
    var st = 'run(' + (n-1) + ')';
    setTimeout(st,25);
  }
}
</source>


[[Category:Examples]]
[[Category:Examples]]
[[Category:Turtle Graphics]]
[[Category:Turtle Graphics]]

Latest revision as of 13:44, 8 June 2011

This is an example, where the turtle speed is controlled by the setTimeout() method of JavaScript.

var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox: [-250, 250, 250, -250]});
var t = brd.create('turtle',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
t.setPenSize(3);

function run(n) {
   if (n>0) {
     t.fd(20);
     t.lt(90*(1-n/100));
     var st = 'run(' + (n-1) + ')';
     setTimeout(st,25);
   }
}