Slow the turtle down: Difference between revisions

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This is an example, where the turtle runs controlled by the setTimeout() method
This is an example, where the turtle speed is controlled by the setTimeout() method
of JavaScript.
of JavaScript.
<html>
<html>
<form><input type="button" value="run" onclick="run(100)"></form>
<form><input type="button" value="run" onclick="run(100)"></form>
</html>
</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',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
var t = brd.create('turtle',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
t.setPenSize(5);
t.setPenSize(3);


function run(n) {
function run(n) {
Line 19: Line 20:
</jsxgraph>
</jsxgraph>


<source lang="xml">
<source lang="javascript">
<html>
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox: [-250, 250, 250, -250]});
<form><input type="button" value="run" onclick="run(100)"></form>
var t = brd.create('turtle',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
</html>
t.setPenSize(3);
<jsxgraph width="500" height="500">
var brd = JXG.JSXGraph.initBoard('jxgbox',{unitX:1, unitY:1, originX:250, originY:250});
var t = brd.createElement('turtle',[100,-50],{strokeOpacity:0.7,fillColor:'#ff8800',fillOpacity:0.2});
t.setPenSize(5);


function run(n) {
function run(n) {
Line 33: Line 30:
     t.lt(90*(1-n/100));
     t.lt(90*(1-n/100));
     var st = 'run(' + (n-1) + ')';
     var st = 'run(' + (n-1) + ')';
     setTimeout(st,50);
     setTimeout(st,25);
   }
   }
}
}
</jsxgraph>
</source>
</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);
   }
}
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