jquery-spline-editor/example3.html at master · Bemmu/jquery-spline-editor · GitHub

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<!DOCTYPE html>
<html>
<head>
<title>Spline Editor example</title>
<script src="jquery.min.js"></script>
<script src="underscore-min.js"></script> <!-- filter, map etc. -->
<script src="sylvester.js"></script> <!-- matrix inverse -->
<script src="spline-editor.js"></script>
<style>
div {
border:solid 1px black;
margin:20px;
width:320px;
height:256px;
}
</style>
</head>
<body>
<div id="splineEditorDiv"></div>
<span id="y-value"></span>
<script>
$('div').splineEditor({
initialKnots: [
[100, 140],
[160, 100],
[220, 140]
]
});

setInterval(function () {
var x = 120;
var y = $('div').splineEditor('getY', x);
$('#y-value').text('Interpolated value at ' + x + ' is ' + y);
}, 50);
</script>
</body>
</html>