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<h1>Graph3d documentation</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 an 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> or a <code>DataView</code>.  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>  <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><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>backgroundColor</td>  <td>string or Object</td>  <td>'white'</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>  <td>backgroundColor.stroke</td>  <td>string</td>  <td>'gray'</td>  <td>The color of the chart border, as an HTML color string.</td></tr><tr>  <td>backgroundColor.strokeWidth</td>  <td>number</td>  <td>1</td>  <td>The border width, in pixels.</td></tr><tr>  <td>backgroundColor.fill</td>  <td>string</td>  <td>'white'</td>  <td>The chart fill color, as an HTML color string.</td></tr>
<tr>  <td>cameraPosition</td>  <td>Object</td>  <td>{horizontal:&nbsp;1.0, vertical:&nbsp;0.5, distance:&nbsp;1.7}</td>  <td>Set the initial rotation and position of the camera.    The object <code>cameraPosition</code> 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.</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 draw in the x-y surface (the bottom of the 3d    graph).</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>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>, and <code>z</code> argument,    and must return a string which may contain HTML.  </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 distance    between the data points, such that bars adjoin each other.    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>none</td>  <td>The maximum value for the x-axis.</td></tr><tr>  <td>xMin</td>  <td>number</td>  <td>none</td>  <td>The minimum value for the x-axis.</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>yBarWidth</td>  <td>number</td>  <td>none</td>  <td>The width of bars in y direction. By default, the width is equal to the distance    between the data points, such that bars adjoin each other.    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>none</td>  <td>The maximum value for the y-axis.</td></tr><tr>  <td>yMin</td>  <td>number</td>  <td>none</td>  <td>The minimum value for the y-axis.</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>zMin</td>  <td>number</td>  <td>none</td>  <td>The minimum value for the z-axis.</td></tr><tr>  <td>zMax</td>  <td>number</td>  <td>none</td>  <td>The maximum value for the z-axis.</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>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>  <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>  <col width="10%">  <col width="60%">  <col width="30%">
  <tr>    <th>name</th>    <th>Description</th>    <th>Properties</th>  </tr>
  <tr>    <td>cameraPositionChange</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>    <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>  </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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