Spirograph: Difference between revisions

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<jsxgraph width="600" height="600">
<jsxgraph width="600" height="600">
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5], kkeepaspectratio:true});
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5], kkeepaspectratio:true});
var R = 2.0;
var r = brd.create('slider',[[-3,4],[3,4],[-5,1,5]],{name:'r'});
var a = brd.create('slider',[[-3,3],[3,3],[-5,1,5]],{name:'a'});
var c = brd.create('curve',[
    function(t){
        var r1 = r.Value();
        return (R-r1)*Math.cos(r1/R*t)+a.Value()*Math.cos((1-r1/R)*t);
    },
    function(t){
        var r1 = r.Value();
        return (R-r1)*Math.sin(r1/R*t)+a.Value()*Math.sin((1-r1/R)*t);
    }
    }, {strokeWidth:3, strokeColor:'3355ff', strokeOpacity:0.7});
</jsxgraph>
</jsxgraph>

Revision as of 15:02, 19 July 2010