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143 lines
5.2 KiB
143 lines
5.2 KiB
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Graph2D | Performance</title>
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<style>
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body, html {
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font-family: arial, sans-serif;
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font-size: 11pt;
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}
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</style>
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<!-- note: moment.js must be loaded before vis.js, else vis.js uses its embedded version of moment.js -->
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<script src="http://cdnjs.cloudflare.com/ajax/libs/moment.js/2.3.1/moment.min.js"></script>
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<script src="../../dist/vis.js"></script>
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<link href="../../dist/vis.css" rel="stylesheet" type="text/css" />
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</head>
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<body>
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<h2>Graph2D | Performance</h2>
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<div style="width:700px; font-size:14px; text-align: justify;">
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This example is a test of the performance of the Graph2D. Select the amount of datapoints you want to plot and press draw.
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You can choose between the style of the points as well as the interpolation method. This can only be toggled with the buttons.
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The interpolation options may not look different for this dataset but you can see their effects clearly in example 7.
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<br /><br />
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Linear interpolation and no points are the settings that will render quickest. By default, graph2D will downsample when there are more
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than 1 point per pixel. This can be manually disabled at the cost of performance by using the <code>sampling</code> option.
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</div>
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<br />
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<p>
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<label for="count">Number of items</label>
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<input id="count" value="50000">
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<input id="toggleInterpolation" type="button" value="toggle Interpolation">
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Interpolation method: <input id="interpolation" value="linear">
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<input id="togglePoints" type="button" value="toggle Points">
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Points style: <input id="points" value="none"> <br/><br/>
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<input id="draw" type="button" value="draw" style="width:200px;"> <span id="description"><b>Click the draw button to load the data!</b></span>
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</p>
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<div id="visualization"></div>
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<script>
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var points = 'none';
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var interpolation = 'linear';
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function togglePoints() {
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var pointsOptions = {};
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var pointsField = document.getElementById("points");
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if (points == "none") {
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points = 'circle';
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pointsOptions = {drawPoints: {style: points}};
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}
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else if (points == "circle") {
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points = 'square';
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pointsOptions = {drawPoints: {style: points}};
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}
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else if (points == "square") {
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points = 'none';
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pointsOptions = {drawPoints: false};
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}
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pointsField.value = points;
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graph2D.setOptions(pointsOptions);
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}
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function toggleInterpolation() {
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var interpolationOptions = {};
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var interpolationField = document.getElementById("interpolation");
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if (interpolation == "linear") {
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interpolation = 'centripetal';
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interpolationOptions = {catmullRom: {parametrization: interpolation}};
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}
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else if (interpolation == "centripetal") {
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interpolation = 'chordal';
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interpolationOptions = {catmullRom: {parametrization: interpolation}};
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}
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else if (interpolation == "chordal") {
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interpolation = 'uniform';
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interpolationOptions = {catmullRom: {parametrization: interpolation}};
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}
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else if (interpolation == "uniform") {
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interpolation = 'linear';
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interpolationOptions = {catmullRom: false};
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}
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interpolationField.value = interpolation;
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graph2D.setOptions(interpolationOptions);
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}
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// create a dataset with items
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var now = moment().minutes(0).seconds(0).milliseconds(0);
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var dataset = new vis.DataSet({
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type: {start: 'ISODate', end: 'ISODate' }
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});
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var startPoint = now;
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var endPoint = now + 3600000 * 5000;
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// create data -- this is seperated into 3 functions so we can update the span.
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function createData() {
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var span = document.getElementById("description");
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span.innerHTML = 'Generating data... (just javascript, not vis.graph2D)...';
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setTimeout(generateData,1);
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}
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function generateData() {
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var count = parseInt(document.getElementById('count').value) || 100;
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var newData = [];
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var span = document.getElementById("description");
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var start = now;
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for (var i = 0; i < count; i++) {
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var yval = Math.sin(i/100) * Math.cos(i/50) * 50 + Math.sin(i/1000) * 50;
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newData.push({id: i, x: start + 3600000 * i, y: yval});
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}
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span.innerHTML = 'Loading data into Graph2D...';
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setTimeout(function() {loadDataIntoVis(newData);},1);
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}
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function loadDataIntoVis(newData) {
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var span = document.getElementById("description");
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dataset.clear();
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dataset.add(newData);
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span.innerHTML = 'Done!';
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}
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document.getElementById('draw').onclick = createData;
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document.getElementById('toggleInterpolation').onclick = toggleInterpolation;
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document.getElementById('togglePoints').onclick = togglePoints;
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var container = document.getElementById('visualization');
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var options = {
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sampling: true,
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drawPoints: {enabled:false, size:3},
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catmullRom: false,
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start: startPoint,
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end: endPoint
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};
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var graph2D = new vis.Graph2d(container, dataset, options);
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</script>
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</body>
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</html>
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