jrtechs
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jrtechs-vis
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<a href="https://github.com/almende/vis" class="hidden-xs hidden-sm hidden-md"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://camo.githubusercontent.com/38ef81f8aca64bb9a64448d0d70f1308ef5341ab/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f6461726b626c75655f3132313632312e706e67" alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png"></a><div class="container full">  <h1>Graph3d</h1>
  <h2 id="Overview">Overview</h2>  <p>    Graph3d is an interactive visualization chart to draw data in a three dimensional    graph. You can freely move and zoom in the graph by dragging and scrolling in the    window. Graph3d also supports animation of a graph.  </p>  <p>    Graph3d uses <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Canvas">HTML canvas</a>    to render graphs, and can render up to a few thousands of data points smoothly.  </p>
  <h2 id="Contents">Contents</h2>  <ul>    <li><a href="#Overview">Overview</a></li>    <li><a href="#Loading">Loading</a></li>    <li><a href="#Data_Format">Data Format</a></li>    <li><a href="#Configuration_Options">Configuration Options</a></li>    <li><a href="#Methods">Methods</a></li>    <li><a href="#Events">Events</a></li>    <li><a href="#Data_Policy">Data Policy</a></li>  </ul>
  <h2 id="Example">Example</h2>  <p>    The following code shows how to create a Graph3d and provide it with data.    More examples can be found in the <a href="../examples">examples</a> directory.  </p>
<pre class="prettyprint lang-html">&lt;!DOCTYPE HTML&gt;&lt;html&gt;&lt;head&gt;  &lt;title&gt;Graph 3D demo&lt;/title&gt;
  &lt;style&gt;    body {font: 10pt arial;}  &lt;/style&gt;
  &lt;script type="text/javascript" src="../../dist/vis.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript"&gt;  var data = null;  var graph = null;
  function custom(x, y) {    return (Math.sin(x/50) * Math.cos(y/50) * 50 + 50);  }
  // Called when the Visualization API is loaded.  function drawVisualization() {    // Create and populate a data table.    var data = new vis.DataSet();    // create some nice looking data with sin/cos    var steps = 50;  // number of datapoints will be steps*steps    var axisMax = 314;    var axisStep = axisMax / steps;    for (var x = 0; x &lt; axisMax; x+=axisStep) {      for (var y = 0; y &lt; axisMax; y+=axisStep) {        var value = custom(x, y);        data.add({          x: x,          y: y,          z: value,          style: value        });      }    }
    // specify options    var options = {      width:  '600px',      height: '600px',      style: 'surface',      showPerspective: true,      showGrid: true,      showShadow: false,      keepAspectRatio: true,      verticalRatio: 0.5    };
    // create a graph3d    var container = document.getElementById('mygraph');    graph3d = new vis.Graph3d(container, data, options);  }  &lt;/script&gt;&lt;/head&gt;
&lt;body onload="drawVisualization();"&gt;  &lt;div id="mygraph"&gt;&lt;/div&gt;&lt;/body&gt;&lt;/html&gt;
</pre>

  <h2 id="Loading">Loading</h2>
  <p>    The class name of the Graph3d is <code>vis.Graph3d</code>.    When constructing a Graph3d, an HTML DOM container must be provided to attach    the graph to. Optionally, data and options can be provided.    Data is a vis <code>DataSet</code> or an <code>Array</code>, described in    section <a href="#Data_Format">Data Format</a>.    Options is a name-value map in the JSON format. The available options    are described in section <a href="#Configuration_Options">Configuration Options</a>.  </p>  <pre class="prettyprint lang-js">var graph = new vis.Graph3d(container [, data] [, options]);</pre>
  <p>    Data and options can be set or changed later on using the functions    <code>Graph3d.setData(data)</code> and <code>Graph3d.setOptions(options)</code>.  </p>
  <h2 id="Data_Format">Data Format</h2>  <p>    Graph3d can load data from an <code>Array</code>, a <code>DataSet</code> (offering 2 way data binding), or a <code>DataView</code> (offering 1 way data binding).    JSON objects are added to this DataSet by using the <code>add()</code> function.    Data points must have properties <code>x</code>, <code>y</code>, and <code>z</code>,    and can optionally have a property <code>style</code> and <code>filter</code>.
  <h3>Definition</h3>  <p>    The DataSet JSON objects are defined as:  </p>
  <table class="properties">    <tr>      <th>Name</th>      <th>Type</th>      <th>Required</th>      <th>Description</th>    </tr>    <tr>      <td>x</td>      <td>number</td>      <td>yes</td>      <td>Location on the x-axis.</td>    </tr>    <tr>      <td>y</td>      <td>number</td>      <td>yes</td>      <td>Location on the y-axis.</td>    </tr>    <tr>      <td>z</td>      <td>number</td>      <td>yes</td>      <td>Location on the z-axis.</td>    </tr>    <tr>      <td>style</td>      <td>number</td>      <td>no</td>      <td>The data value, required for graph styles <code>dot-color</code> and        <code>dot-size</code>.      </td>    </tr>    <tr>      <td>filter</td>      <td>*</td>      <td>no</td>      <td>Filter values used for the animation.        This column may have any type, such as a number, string, or Date.</td>    </tr>  </table>


  <h2 id="Configuration_Options">Configuration Options</h2>
  <p>    Options can be used to customize the graph. Options are defined as a JSON object.    All options are optional.  </p>
<pre class="prettyprint lang-js">var options = {    width:  '100%',    height: '400px',    style: 'surface'};</pre>
  <p>    The following options are available.  </p>
  <table class="options" id="optionTable">    <tr>      <th>Name</th>      <th>Type</th>      <th>Default</th>      <th>Description</th>    </tr>
    <tr>      <td>animationInterval</td>      <td>number</td>      <td>1000</td>      <td>The animation interval in milliseconds. This determines how fast        the animation runs.</td>    </tr>    <tr>      <td>animationPreload</td>      <td>boolean</td>      <td>false</td>      <td>If false, the animation frames are loaded as soon as they are requested.        if <code>animationPreload</code> is true, the graph will automatically load        all frames in the background, resulting in a smoother animation as soon as        all frames are loaded. The load progress is shown on screen.</td>    </tr>    <tr>      <td>animationAutoStart</td>      <td>boolean</td>      <td>false</td>      <td>If true, the animation starts playing automatically after the graph        is created.</td>    </tr>
    <tr>      <td>axisColor</td>      <td>string</td>      <td>'#4D4D4D'</td>      <td>The color of the axis lines and the text along the axis.</td>    </tr>
    <tr class='toggle collapsible' onclick="toggleTable('optionTable','backgroundColor', this);">      <td><span parent="backgroundColor" class="right-caret"></span> backgroundColor</td>      <td>string or Object</td>      <td>Object</td>      <td>The background color for the main area of the chart.        Can be either a simple HTML color string, for example: 'red' or '#00cc00',        or an object with the following properties.</td>    </tr>    <tr parent="backgroundColor" class="hidden">      <td class="indent">backgroundColor.fill</td>      <td>string</td>      <td>'white'</td>      <td>The chart fill color, as an HTML color string.</td>    </tr>    <tr parent="backgroundColor" class="hidden">      <td class="indent">backgroundColor.stroke</td>      <td>string</td>      <td>'gray'</td>      <td>The color of the chart border, as an HTML color string.</td>    </tr>    <tr>    <tr parent="backgroundColor" class="hidden">      <td class="indent">backgroundColor.strokeWidth</td>      <td>number</td>      <td>1</td>      <td>The border width, in pixels.</td>    </tr>
    <tr class='toggle collapsible' onclick="toggleTable('optionTable','cameraPosition', this);">      <td><span parent="cameraPosition" class="right-caret"></span> cameraPosition</td>      <td>Object</td>      <td>Object</td>      <td>Set the initial rotation and position of the camera.        All parameters are optional.    </tr>    <tr parent="cameraPosition" class="hidden">      <td class="indent">cameraPosition.horizontal</td>      <td>number</td>      <td>1.0</td>      <td>Value in radians. It can have any        value, but is normally in the range of 0 and 2*Pi.</td>    </tr>    <tr parent="cameraPosition" class="hidden">      <td class="indent">cameraPosition.vertical</td>      <td>number</td>      <td>0.5</td>      <td>Value in radians between 0 and 0.5*Pi.</td>    </tr>    <tr parent="cameraPosition" class="hidden">      <td class="indent">cameraPosition.distance</td>      <td>number</td>      <td>1.7</td>      <td>The (normalized) distance from the        camera to the center of the graph, in the range of 0.71 to 5.0. A        larger distance puts the graph further away, making it smaller.</p>    </tr>
    <tr class='toggle collapsible' onclick="toggleTable('optionTable','dataColor', this);">      <td><span parent="dataColor" class="right-caret"></span> dataColor</td>      <td>string or object</td>      <td>Object</td>      <td>When <code>dataColor</code> is a string, it will set the color for both border and fill color of dots and bars. Applicable for styles <code>dot-size</code>, <code>bar-size</code>, and <code>line</code>. When an object, it can contain the properties descibed below.</td>    </tr>    <tr parent="dataColor" class="hidden">      <td class="indent">dataColor.fill</td>      <td>string</td>      <td>'#7DC1FF'</td>      <td>The fill color of the dots or bars. Applicable when using styles <code>dot-size</code>, <code>bar-size</code>, or <code>line</code>.</td>      </tr>    <tr parent="dataColor" class="hidden">      <td class="indent">dataColor.stroke</td>      <td>string</td>      <td>'#3267D2'</td>      <td>The border color of the dots or bars. Applicable when using styles <code>dot-size</code> or <code>bar-size</code>.</td>    </tr>    <tr parent="dataColor" class="hidden">      <td class="indent">dataColor.strokeWidth</td>      <td>number</td>      <td>1</td>      <td>The line width of dots, bars and lines. Applicable for all styles.</td>    </tr>
    <tr>      <td>dotSizeRatio</td>      <td>number</td>      <td>0.02</td>      <td>Ratio of the size of the dots with respect to the width of the graph.</td>    </tr>
    <tr>      <td>dotSizeMinFraction</td>      <td>number</td>      <td>0.5</td>      <td>Size of minimum-value dot as a fraction of dotSizeRatio.          Applicable when using style <code>dot-size</code>.</td>      </td>    </tr>
    <tr>      <td>dotSizeMaxFraction</td>      <td>number</td>      <td>2.5</td>      <td>Size of maximum-value dot as a fraction of dotSizeRatio.          Applicable when using style <code>dot-size</code>.</td>      </td>    </tr>
    <tr>      <td>gridColor</td>      <td>string</td>      <td>'#D3D3D3'</td>      <td>The color of the grid lines.</td>    </tr>
    <tr>      <td>height</td>      <td>string</td>      <td>'400px'</td>      <td>The height of the graph in pixels or as a percentage.</td>    </tr>
    <tr>      <td>keepAspectRatio</td>      <td>boolean</td>      <td>true</td>      <td>If <code>keepAspectRatio</code> is true, the x-axis and the y-axis        keep their aspect ratio. If false, the axes are scaled such that they        both have the same, maximum with.</td>    </tr>
    <tr>      <td>showAnimationControls</td>      <td>boolean</td>      <td>true</td>      <td>If true, animation controls are created at the bottom of the Graph.        The animation controls consists of buttons previous, start/stop, next,        and a slider showing the current frame.        Only applicable when the provided data contains an animation.</td>    </tr>    <tr>      <td>showGrid</td>      <td>boolean</td>      <td>true</td>      <td>If true, grid lines are drawn in the x-y surface (the bottom of the 3d        graph).</td>    </tr>    <tr>      <td>showXAxis</td>      <td>boolean</td>      <td>true</td>      <td>If true, X axis and X axis labels are drawn.</td>    </tr>    <tr>      <td>showYAxis</td>      <td>boolean</td>      <td>true</td>      <td>If true, Y axis and Y axis labels are drawn.</td>    </tr>    <tr>      <td>showZAxis</td>      <td>boolean</td>      <td>true</td>      <td>If true, Z axis and Z axis labels are drawn.</td>    </tr>    <tr>      <td>showPerspective</td>      <td>boolean</td>      <td>true</td>      <td>If true, the graph is drawn in perspective: points and lines which        are further away are drawn smaller.        Note that the graph currently does not support a gray colored bottom side        when drawn in perspective.      </td>    </tr>    <tr>      <td>showLegend</td>      <td>boolean</td>      <td>none</td>      <td>If true, a legend is drawn for the graph (if the graph type supports it).           By default a legend is drawn for dot and dot-color style graphs.       </td>    </tr>    <tr>      <td>showShadow</td>      <td>boolean</td>      <td>false</td>      <td>Show shadow on the graph.</td>    </tr>    <tr>      <td>style</td>      <td>string</td>      <td>'dot'</td>      <td>The style of the 3d graph. Available styles:        <code>bar</code>,        <code>bar-color</code>,        <code>bar-size</code>,        <code>dot</code>,        <code>dot-line</code>,        <code>dot-color</code>,        <code>dot-size</code>,        <code>line</code>,        <code>grid</code>,        or <code>surface</code></td>    </tr>
    <tr>      <td>tooltip</td>      <td>boolean | function</td>      <td>false</td>      <td>Show a tooltip showing the values of the hovered data point.        The contents of the tooltip can be customized by providing a callback        function as <code>tooltip</code>. In this case the function is called        with an object containing parameters <code>x</code>,    <code>y</code>, <code>z</code>, and <code>data</code>    (the source JS object for the point) as an argument,        and must return a string which may contain HTML.      </td>    </tr>
    <tr class='toggle collapsible' onclick="toggleTable('optionTable','tooltipStyle', this);">      <td><span parent="tooltipStyle" class="right-caret"></span> tooltipStyle</td>      <td>Object</td>      <td>Object</td>      </td>      <td>Tooltip style properties.        Provided properties will be merged with the default object.      </td>    </tr>    <!-- Can't define separate entries for content, line and dot objects here,
         because toggleTable() can't handle multiple levels of collapsibles -->     <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.content.padding</td>      <td>string</td>      <td>'10px'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.content.border</td>      <td>string</td>      <td>'1px solid #4d4d4d'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.content.color</td>      <td>string</td>      <td>'#1a1a1a'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.content.background</td>      <td>string</td>      <td>'rgba(255,255,255,0.7)'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.content.borderRadius</td>      <td>string</td>      <td>'2px'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.content.boxShadow</td>      <td>string</td>      <td>'5px 5px 10px rgba(128,128,128,0.5)'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.line.height</td>      <td>string</td>      <td>'40px'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.line.width</td>      <td>string</td>      <td>'0'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.line.borderLeft</td>      <td>string</td>      <td>'1px solid #4d4d4d'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.dot.height</td>      <td>string</td>      <td>'0'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.dot.width</td>      <td>string</td>      <td>'0'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.dot.border</td>      <td>string</td>      <td>'5px solid #4d4d4d'</td>      <td></td>    </tr>    <tr parent="tooltipStyle" class="hidden">      <td class="indent">tooltipStyle.dot.borderRadius</td>      <td>string</td>      <td>'5px'</td>      <td></td>    </tr>
    <tr>      <td>valueMax</td>      <td>number</td>      <td>none</td>      <td>The maximum value for the value-axis. Only available in combination        with the styles <code>dot-color</code> and <code>dot-size</code>.</td>    </tr>    <tr>      <td>valueMin</td>      <td>number</td>      <td>none</td>      <td>The minimum value for the value-axis. Only available in combination        with the styles <code>dot-color</code> and <code>dot-size</code>.</td>    </tr>    <tr>      <td>verticalRatio</td>      <td>number</td>      <td>0.5</td>      <td>A value between 0.1 and 1.0. This scales the vertical size of the graph        When keepAspectRatio is set to false, and verticalRatio is set to 1.0,        the graph will be a cube.</td>    </tr>
    <tr>      <td>width</td>      <td>string</td>      <td>'400px'</td>      <td>The width of the graph in pixels or as a percentage.</td>    </tr>
    <tr>      <td>xBarWidth</td>      <td>number</td>      <td>none</td>      <td>The width of bars in x direction. By default, the width is equal to the smallest distance        between the data points.        Only applicable for styles <code>'bar'</code> and <code>'bar-color'</code>.</td>    </tr>
    <tr>      <td>xCenter</td>      <td>string</td>      <td>'55%'</td>      <td>The horizontal center position of the graph, as a percentage or in        pixels.</td>    </tr>    <tr>      <td>xMax</td>      <td>number</td>      <td>from data</td>      <td>The maximum value for the x-axis.         If not set, the largest value for x in the data set is used.      </td>    </tr>    <tr>      <td>xMin</td>      <td>number</td>      <td>from data</td>      <td>The minimum value for the x-axis.         If not set, the smallest value for x in the data set is used.      </td>    </tr>    <tr>      <td>xStep</td>      <td>number</td>      <td>none</td>      <td>Step size for the grid on the x-axis.</td>    </tr>    <tr>      <td>xValueLabel</td>      <td>function</td>      <td>none</td>      <td>A function for custom formatting of the labels along the x-axis,        for example <code>function (x) {return (x * 100) + '%'}</code>.      </td>    </tr>
    <tr>      <td>yBarWidth</td>      <td>number</td>      <td>none</td>      <td>The width of bars in y direction. By default, the width is equal to the smallest distance        between the data points.        Only applicable for styles <code>'bar'</code> and <code>'bar-color'</code>.</td>    </tr>
    <tr>      <td>yCenter</td>      <td>string</td>      <td>'45%'</td>      <td>The vertical center position of the graph, as a percentage or in        pixels.</td>    </tr>    <tr>      <td>yMax</td>      <td>number</td>      <td>from data</td>      <td>The maximum value for the y-axis.         If not set, the largest value for y in the data set is used.      </td>    </tr>    <tr>      <td>yMin</td>      <td>number</td>      <td>from data</td>      <td>The minimum value for the y-axis.         If not set, the smallest value for y in the data set is used.      </td>    </tr>    <tr>      <td>yStep</td>      <td>number</td>      <td>none</td>      <td>Step size for the grid on the y-axis.</td>    </tr>    <tr>      <td>yValueLabel</td>      <td>function</td>      <td>none</td>      <td>A function for custom formatting of the labels along the y-axis,        for example <code>function (y) {return (y * 100) + '%'}</code>.      </td>    </tr>
    <tr>      <td>zMax</td>      <td>number</td>      <td>from data</td>      <td>The maximum value for the z-axis.         If not set, the largest value for z in the data set is used.      </td>    </tr>    <tr>      <td>zMin</td>      <td>number</td>      <td>from data</td>      <td>The minimum value for the z-axis.         If not set, the smallest value for z in the data set is used.      </td>    </tr>    <tr>      <td>zStep</td>      <td>number</td>      <td>none</td>      <td>Step size for the grid on the z-axis.</td>    </tr>    <tr>      <td>zValueLabel</td>      <td>function</td>      <td>none</td>      <td>A function for custom formatting of the labels along the z-axis,        for example <code>function (z) {return (z * 100) + '%'}</code>.      </td>    </tr>
    <tr>      <td>xLabel</td>      <td>String</td>      <td>x</td>      <td>Label on the X axis.</td>    </tr>    <tr>      <td>yLabel</td>      <td>String</td>      <td>y</td>      <td>Label on the Y axis.</td>    </tr>    <tr>      <td>zLabel</td>      <td>String</td>      <td>z</td>      <td>Label on the Z axis.</td>    </tr>    <tr>      <td>filterLabel</td>      <td>String</td>      <td>time</td>      <td>Label for the filter column.</td>    </tr>    <tr>      <td>legendLabel</td>      <td>String</td>      <td>value</td>      <td>Label for the style description.</td>    </tr>  </table>

  <h2 id="Methods">Methods</h2>  <p>    Graph3d supports the following methods.  </p>
  <table class="methods">    <tr>      <th>Method</th>      <th>Return Type</th>      <th>Description</th>    </tr>
    <tr>      <td>animationStart()</td>      <td>none</td>      <td>Start playing the animation.        Only applicable when animation data is available.</td>    </tr>
    <tr>      <td>animationStop()</td>      <td>none</td>      <td>Stop playing the animation.        Only applicable when animation data is available.</td>    </tr>
    <tr>      <td>getCameraPosition()</td>      <td>An object with parameters <code>horizontal</code>,        <code>vertical</code> and <code>distance</code></td>      <td>Returns an object with parameters <code>horizontal</code>,        <code>vertical</code> and <code>distance</code>,        which each one of them is a number, representing the rotation and position        of the camera.</td>    </tr>
    <tr>      <td>redraw()</td>      <td>none</td>      <td>Redraw the graph. Useful after the camera position is changed externally,        when data is changed, or when the layout of the webpage changed.</td>    </tr>
    <tr>      <td>setData(data)</td>      <td>none</td>      <td>Replace the data in the Graph3d.</td>    </tr>
    <tr>      <td>setOptions(options)</td>      <td>none</td>      <td>Update options of Graph3d.        The provided options will be merged with current options.</td>    </tr>
    <tr>      <td>setSize(width, height)</td>      <td>none</td>      <td>Parameters <code>width</code> and <code>height</code> are strings,        containing a new size for the graph. Size can be provided in pixels        or in percentages.</td>    </tr>
    <tr>      <td>setCameraPosition (pos)</td>      <td>{horizontal:&nbsp;1.0, vertical:&nbsp;0.5, distance:&nbsp;1.7}</td>      <td>Set the rotation and position of the camera. Parameter <code>pos</code>        is an object which contains three parameters: <code>horizontal</code>,        <code>vertical</code>, and <code>distance</code>.        Parameter <code>horizontal</code> is a value in radians and can have any        value (but normally in the range of 0 and 2*Pi).        Parameter <code>vertical</code> is a value in radians between 0 and 0.5*Pi.        Parameter <code>distance</code> is the (normalized) distance from the        camera to the center of the graph, in the range of 0.71 to 5.0. A        larger distance puts the graph further away, making it smaller.        All parameters are optional.      </td>    </tr>
  </table>
  <h2 id="Events">Events</h2>  <p>    Graph3d fires events after the camera position has been changed.    The event can be catched by creating a listener.    Here an example on how to catch a <code>cameraPositionChange</code> event.  </p>
<pre class="prettyprint lang-js">function onCameraPositionChange(event) {  alert('The camera position changed to:\n' +        'Horizontal: ' + event.horizontal + '\n' +        'Vertical: ' + event.vertical + '\n' +        'Distance: ' + event.distance);}// assuming var graph3d = new vis.Graph3d(document.getElementById('mygraph'));graph3d.on('cameraPositionChange', onCameraPositionChange);</pre>
  <p>    The following events are available.  </p>
  <table class="events">    <tr>      <th>name</th>      <th>Properties</th>      <th>Description</th>    </tr>
    <tr>      <td>cameraPositionChange</td>      <td>        <ul>          <li><code>horizontal</code>: Number. The horizontal angle of the camera.</li>          <li><code>vertical</code>: Number. The vertical angle of the camera.</li>          <li><code>distance</code>: Number. The distance of the camera to the center of the graph.</li>        </ul>      </td>      <td>The camera position changed. Fired after the user modified the camera position        by moving (dragging) the graph, or by zooming (scrolling),        but not after a call to <code>setCameraPosition</code> method.        The new camera position can be retrieved by calling the method        <code>getCameraPosition</code>.</td>    </tr>  </table>
  <h2 id="Data_Policy">Data Policy</h2>  <p>    All code and data are processed and rendered in the browser. No data is sent to any server.  </p>
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