Trace curve: Difference between revisions

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var C0 = brd.create('point', [1.5, 1.0], {visible:false});
var C0 = brd.create('point', [1.5, 1.0], {visible:false});
var g = brd.create('line', [A,B], {visible:false});
var g = brd.create('line', [A,B], {visible:false});
var h = brd.create('parallel', [g, C0], {visible:true});
var h = brd.create('parallel', [g, C0], {visible:true, strokeWidth:1});
var C = brd.create('glider', [0, 1.5, h], {name:'C'});
var C = brd.create('glider', [-1.5, 1.0, h], {name:'C'});
var p = brd.create('polygon', [A, B, C]);
var p = brd.create('polygon', [A, B, C]);


var M1 = brd.create('midpoint', [A, B], {withLabel:false});
var s1 = brd.create('perpendicular', [p.borders[0], C], {dash:3, strokeWidth:1});
var M2 = brd.create('midpoint', [A, C], {withLabel:false});
var s2 = brd.create('perpendicular', [p.borders[1], A], {dash:3, strokeWidth:1});
var M3 = brd.create('midpoint', [B, C], {withLabel:false});
var s3 = brd.create('perpendicular', [p.borders[2], B], {dash:3, strokeWidth:1});
var s1 = brd.create('perpendicular', [[A,B], M1]);
var s2 = brd.create('line', [B, M2]);
var s3 = brd.create('line', [A, M3]);


var s = brd.create('intersection', [s1, s2, 0], {name:'S', trace:true});
var S = brd.create('intersection', [s1, s2, 0], {name:'S', trace:false});
var curve = brd.create('tracecurve', [C, S], {strokeColor:'blue'});


</jsxgraph>
</jsxgraph>
===The underlying JavaScript code===
<source lang="javascript">
var brd = JXG.JSXGraph.initBoard('jxgbox',{axis:false,boundingbox:[-2,2,2,-2],keepaspectratio:true});
var A = brd.create('point', [-1.5, -1.5]);
var B = brd.create('point', [1.5, -1.5]);
var C0 = brd.create('point', [1.5, 1.0], {visible:false});
var g = brd.create('line', [A,B], {visible:false});
var h = brd.create('parallel', [g, C0], {visible:true, strokeWidth:1});
var C = brd.create('glider', [-1.5, 1.0, h], {name:'C'});
var p = brd.create('polygon', [A, B, C]);
var s1 = brd.create('perpendicular', [p.borders[0], C], {dash:3, strokeWidth:1});
var s2 = brd.create('perpendicular', [p.borders[1], A], {dash:3, strokeWidth:1});
var s3 = brd.create('perpendicular', [p.borders[2], B], {dash:3, strokeWidth:1});
var S = brd.create('intersection', [s1, s2, 0], {name:'S', trace:false});
var curve = brd.create('tracecurve', [C, S], {strokeColor:'blue'});
</source>


[[Category:Examples]]
[[Category:Examples]]
[[Category:Geometry]]

Latest revision as of 12:05, 22 June 2012

The underlying JavaScript code

var brd = JXG.JSXGraph.initBoard('jxgbox',{axis:false,boundingbox:[-2,2,2,-2],keepaspectratio:true});
var A = brd.create('point', [-1.5, -1.5]);
var B = brd.create('point', [1.5, -1.5]);
var C0 = brd.create('point', [1.5, 1.0], {visible:false});
var g = brd.create('line', [A,B], {visible:false});
var h = brd.create('parallel', [g, C0], {visible:true, strokeWidth:1});
var C = brd.create('glider', [-1.5, 1.0, h], {name:'C'});
var p = brd.create('polygon', [A, B, C]);

var s1 = brd.create('perpendicular', [p.borders[0], C], {dash:3, strokeWidth:1});
var s2 = brd.create('perpendicular', [p.borders[1], A], {dash:3, strokeWidth:1});
var s3 = brd.create('perpendicular', [p.borders[2], B], {dash:3, strokeWidth:1});

var S = brd.create('intersection', [s1, s2, 0], {name:'S', trace:false});
var curve = brd.create('tracecurve', [C, S], {strokeColor:'blue'});