Construction of a constrained point: Difference between revisions

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A point can depend on another geometric object. This dependence can be given by using JavaScript syntax or by using
GEONExT syntax. Here is an example using GEONExT syntax.
The point A is draggable. The point B depends on point A: Its y-coordinate is set to 1 and its x-coordinate is set
to the x-coordinate of A.
<source lang="javascript">
var b = JXG.JSXGraph.initBoard('jxgbox1', {originX: 40, originY: 100, unitX: 40, unitY: 40});
var free = b.createElement('point',[0,0], {name:'A', style:5});
var dep = b.createElement('point',["X(A)",1], {name:'B', style:8});
</source>
<html>
<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
<div id="jxgbox1" class="jxgbox" style="width:600px; height:200px;"></div>
<script type="text/javascript">
var b = JXG.JSXGraph.initBoard('jxgbox1', {originX: 40, originY: 100, unitX: 40, unitY: 40});
var free = b.createElement('point',[0,0], {name:'A', style:5});
var dep = b.createElement('point',["X(A)",1], {name:'B', style:8});
</script>
</html>


Now we do exactly the same with JavaScript syntax.
<source lang="javascript">
var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 40, originY: 100, unitX: 40, unitY: 40});
var free = b.createElement('point',[0,0], {name:'A', style:5});
var dep = b.createElement('point',["X(A)",1], {name:'B', style:8});
</source>
<html>
<div id="jxgbox2" class="jxgbox" style="width:600px; height:200px;"></div>
<script type="text/javascript">
var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 40, originY: 100, unitX: 40, unitY: 40});
var free = b2.createElement('point',[0,0], {name:'A', style:5});
var dep = b2.createElement('point',["X(A)",1], {name:'B', style:8});
</script>
== More ==
[[Category:Examples]]

Latest revision as of 10:09, 17 September 2008