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707 lines
20 KiB
707 lines
20 KiB
<html>
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<head>
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<title>Graph3d documentation</title>
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<link rel='stylesheet' href='css/default.css' type='text/css'>
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<link href="lib/prettify/prettify.css" type="text/css" rel="stylesheet" />
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<script type="text/javascript" src="lib/prettify/prettify.js"></script>
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</head>
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<body onload="prettyPrint();">
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<div id="container">
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<h1>Graph3d documentation</h1>
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<table>
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<tr>
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<td>Author</td>
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<td>Jos de Jong, <a href="http://www.almende.com" target="_blank">Almende B.V.</a></td>
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</tr>
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<tr>
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<td>Webpage</td>
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<td><a href="http://almende.github.com/chap-links-library" target="_blank">Chap Links Library</a></td>
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</tr>
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<tr>
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<td>License</td>
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<td> <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank">Apache License, Version 2.0</a></td>
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</tr>
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</table>
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<h2 id="Contents">Contents</h2>
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<ul>
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<li><a href="#Overview">Overview</a></li>
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<li><a href="#Loading">Loading</a></li>
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<li><a href="#Data_Format">Data Format</a></li>
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<li><a href="#Configuration_Options">Configuration Options</a></li>
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<li><a href="#Methods">Methods</a></li>
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<li><a href="#Events">Events</a></li>
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<li><a href="#Data_Policy">Data Policy</a></li>
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</ul>
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<h2 id="Overview">Overview</h2>
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<p>
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Graph3d is an interactive visualization chart to draw data in a three dimensional
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graph. You can freely move and zoom in the graph by dragging and scrolling in the
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window.
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Graph3d also supports animation of a graph.
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</p>
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<pre class="prettyprint lang-html">
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title>Graph 3D demo</title>
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<style>
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body {font: 10pt arial;}
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</style>
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<script type="text/javascript" src="../../dist/vis.js"></script>
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<script type="text/javascript">
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var data = null;
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var graph = null;
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function custom(x, y) {
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return (Math.sin(x/50) * Math.cos(y/50) * 50 + 50);
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}
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// Called when the Visualization API is loaded.
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function drawVisualization() {
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// Create and populate a data table.
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var data = new vis.DataSet({});
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// create some nice looking data with sin/cos
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var steps = 50; // number of datapoints will be steps*steps
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var axisMax = 314;
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var axisStep = axisMax / steps;
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for (var x = 0; x < axisMax; x+=axisStep) {
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for (var y = 0; y < axisMax; y+=axisStep) {
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var value = custom(x,y);
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data.add([
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{x:x,y:y,z:value,style:value}
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]);
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}
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}
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// specify options
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var options = {
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width: "600px",
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height: "600px",
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style: "surface",
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showPerspective: true,
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showGrid: true,
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showShadow: false,
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keepAspectRatio: true,
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verticalRatio: 0.5
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};
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// Instantiate our graph object.
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graph = new links.Graph3d(document.getElementById('mygraph'));
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// Draw our graph with the created data and options
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graph.draw(data, options);
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}
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</script>
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</head>
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<body onload="drawVisualization();">
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<div id="mygraph"></div>
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<div id="info"></div>
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</body>
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</html>
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</pre>
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The class name of the Graph3d is <code>links.Graph3d</code>
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<pre class="prettyprint lang-js">var graph = new links.Graph3d(container);</pre>
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After being loaded, the graph can be drawn via the function <code>draw()</code>,
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provided with data and options.
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<pre class="prettyprint lang-js">graph.draw(data, options);</pre>
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where data is a <code>DataTable</code>, and options is a name-value map in the JSON format.
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<h2 id="Data_Format">Data Format</h2>
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<p>
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Graph3d requires a data table with tree to five columns, depending on the chosen style
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and animation.
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The first three columns must contain the location coordinates for x-axis,
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y-axis, and z-axis.
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The forth column is optional, and can contain a data value.
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The last column (this can be the fourth or fifth column) and can contain
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filter values used for animation.
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</p>
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<p>
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Note that the column labels can be changed (for example instead of <code>'value'</code>
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one can use <code>'Temperature'</code>).
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</p>
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<h3>Definition</h3>
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<p>
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The data columns are defined as:
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</p>
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<table>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th>Required</th>
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<th>Description</th>
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</tr>
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<tr>
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<td>x</td>
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<td>number</td>
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<td>yes</td>
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<td>Location on the x-axis.</td>
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</tr>
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<tr>
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<td>y</td>
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<td>number</td>
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<td>yes</td>
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<td>Location on the y-axis.</td>
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</tr>
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<tr>
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<td>z</td>
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<td>number</td>
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<td>yes</td>
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<td>Location on the z-axis.</td>
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</tr>
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<tr>
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<td>value</td>
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<td>number</td>
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<td>no</td>
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<td>The data value, required for graph styles <code>dot-color</code> and
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<code>dot-size</code>.
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</td>
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</tr>
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<tr>
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<td>filtervalue</td>
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<td>anytype</td>
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<td>no</td>
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<td>Filter values used for the animation.
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This column may have any type, such as a number, string, or Date.</td>
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</tr>
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</table>
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<h3>Construction of 3D data</h3>
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<p>
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Graph3d supports the following styles to display data in three dimensions:
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<code>dot</code>, <code>dot-line</code>, <code>line</code>, <code>grid</code>,
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and <code>surface</code>.
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The data table for these styles is constructed as follows.
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</p>
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<pre class="prettyprint lang-js">
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var data = new google.visualization.DataTable();
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data.addColumn('number', 'x');
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data.addColumn('number', 'y');
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data.addColumn('number', 'z'); // the data value, visualized as a height at the z-axis
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// and by a color.
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data.addRow([2.3, 5.2, 102.1]);
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// ...
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</pre>
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<h3>Construction of 4D data</h3>
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<p>
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Graph3d supports the following styles to display data in four dimensions:
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<code>dot-color</code>, <code>dot-size</code>.
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The data table for these styles is constructed as follows.
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</p>
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<pre class="prettyprint lang-js">
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var data = new google.visualization.DataTable();
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data.addColumn('number', 'x');
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data.addColumn('number', 'y');
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data.addColumn('number', 'z');
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data.addColumn('number', 'value'); // the data value, visualized by a color or size
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data.addRow([2.3, 5.2, 102.1, 45.2]);
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// ...
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</pre>
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<h3>Construction of animation data</h3>
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<p>
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If an extra column with filter values is provided in the data table, Graph3d
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will use these values for animation.
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The filter values are grouped and each group represents one animation frame.
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When animating, Graph3d loops through the distinct filter values,
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and draws all data points which have the current filter value.
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</p>
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<p>
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For example, to create an animation with three frames, first add all datapoints
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for the first frame with a filtervalue 1. Next, add the datapoints for the
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second frame and give them a filtervalue 2. Last, add the datapoints for the
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third frame and give them a filtervalue of 3. Now, when the Graph3d is loaded,
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a slider with buttons play/next/previous will be drawn below the graph, where one can loop through the
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three frames.
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</p>
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<p>
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To create an animation, add an extra column to the data table.
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This column may have any type (number, date, string, ...).
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</p>
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<pre class="prettyprint lang-js">
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var data = new google.visualization.DataTable();
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data.addColumn('number', 'x');
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data.addColumn('number', 'y');
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data.addColumn('number', 'value');
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data.addColumn('number', 'filtervalue'); // Optional column with filter values for animation
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data.addRow([2.3, 5.2, 102.1, 23]);
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// ...
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</pre>
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<h2 id="Configuration_Options">Configuration Options</h2>
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<p>
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Options can be used to customize the graph. Options are defined as a JSON object.
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All options are optional.
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</p>
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<pre class="prettyprint lang-js">
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options = {
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width: "100%",
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height: "400px",
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style: "surface"
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};
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</pre>
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<p>
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The following options are available.
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</p>
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<table>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th>Default</th>
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<th>Description</th>
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</tr>
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<tr>
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<td>animationInterval</td>
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<td>number</td>
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<td>1000</td>
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<td>The animation interval in milliseconds. This determines how fast
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the animation runs.</td>
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</tr>
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<tr>
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<td>animationPreload</td>
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<td>boolean</td>
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<td>false</td>
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<td>If false, the animation frames are loaded as soon as they are requested.
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if <code>animationPreload</code> is true, the graph will automatically load
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all frames in the background, resulting in a smoother animation as soon as
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all frames are loaded. The load progress is shown on screen.</td>
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</tr>
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<tr>
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<td>animationAutoStart</td>
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<td>boolean</td>
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<td>false</td>
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<td>If true, the animation starts playing automatically after the graph
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is created.</td>
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</tr>
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<tr>
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<td>backgroundColor</td>
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<td>string or Object</td>
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<td>"white"</td>
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<td>The background color for the main area of the chart.
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Can be either a simple HTML color string, for example: 'red' or '#00cc00',
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or an object with the following properties.</td>
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</tr>
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<tr>
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<td>backgroundColor.stroke</td>
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<td>string</td>
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<td>"gray"</td>
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<td>The color of the chart border, as an HTML color string.</td>
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</tr>
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<tr>
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<td>backgroundColor.strokeWidth</td>
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<td>number</td>
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<td>1</td>
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<td>The border width, in pixels.</td>
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</tr>
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<tr>
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<td>backgroundColor.fill</td>
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<td>string</td>
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<td>"white"</td>
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<td>The chart fill color, as an HTML color string.</td>
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</tr>
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<tr>
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<td>cameraPosition</td>
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<td>Object</td>
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<td>{"horizontal": 1.0, "vertical": 0.5, "distance": 1.7}</td>
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<td>Set the initial rotation and position of the camera.
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The object <code>cameraPosition</code> contains three parameters:
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<code>horizontal</code>, <code>vertical</code>, and <code>distance</code>.
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Parameter <code>horizontal</code> is a value in radians and can have any
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value (but normally in the range of 0 and 2*Pi).
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Parameter <code>vertical</code> is a value in radians between 0 and 0.5*Pi.
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Parameter <code>distance</code> is the (normalized) distance from the
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camera to the center of the graph, in the range of 0.71 to 5.0. A
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larger distance puts the graph further away, making it smaller.
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All parameters are optional.
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</tr>
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<tr>
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<td>height</td>
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<td>string</td>
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<td>"400px"</td>
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<td>The height of the graph in pixels or as a percentage.</td>
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</tr>
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<tr>
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<td>keepAspectRatio</td>
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<td>boolean</td>
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<td>true</td>
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<td>If <code>keepAspectRatio</code> is true, the x-axis and the y-axis
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keep their aspect ratio. If false, the axes are scaled such that they
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both have the same, maximum with.</td>
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</tr>
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<tr>
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<td>showAnimationControls</td>
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<td>boolean</td>
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<td>true</td>
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<td>If true, animation controls are created at the bottom of the Graph.
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The animation controls consists of buttons previous, start/stop, next,
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and a slider showing the current frame.
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Only applicable when the provided data contains an animation.</td>
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</tr>
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<tr>
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<td>showGrid</td>
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<td>boolean</td>
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<td>true</td>
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<td>If true, grid lines are draw in the x-y surface (the bottom of the 3d
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graph).</td>
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</tr>
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<tr>
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<td>showPerspective</td>
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<td>boolean</td>
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<td>true</td>
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<td>If true, the graph is drawn in perspective: points and lines which
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are further away are drawn smaller.
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Note that the graph currently does not support a gray colored bottom side
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when drawn in perspective.
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</td>
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</tr>
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<tr>
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<td>showShadow</td>
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<td>boolean</td>
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<td>false</td>
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<td>Show shadow on the graph.</td>
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</tr>
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<tr>
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<td>style</td>
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<td>string</td>
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<td>"dot"</td>
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<td>The style of the 3d graph. Available styles:
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<code>bar</code>,
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<code>bar-color</code>,
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<code>bar-size</code>,
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<code>dot</code>,
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<code>dot-line</code>,
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<code>dot-color</code>,
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<code>dot-size</code>,
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<code>line</code>,
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<code>grid</code>,
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or <code>surface</code></td>
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</tr>
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<tr>
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<td>tooltip</td>
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<td>boolean | function</td>
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<td>false</td>
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<td>Show a tooltip showing the values of the hovered data point.
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The contents of the tooltip can be customized by providing a callback
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function as <code>tooltip</code>. In this case the function is called
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with an object containing parameters <code>x</code>,
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<code>y</code>, and <code>z</code> argument,
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and must return a string which may contain HTML.
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</td>
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</tr>
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<tr>
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<td>valueMax</td>
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<td>number</td>
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<td>none</td>
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<td>The maximum value for the value-axis. Only available in combination
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with the styles <code>dot-color</code> and <code>dot-size</code>.</td>
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</tr>
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<tr>
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<td>valueMin</td>
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<td>number</td>
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<td>none</td>
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<td>The minimum value for the value-axis. Only available in combination
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with the styles <code>dot-color</code> and <code>dot-size</code>.</td>
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</tr>
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<tr>
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<td>verticalRatio</td>
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<td>number</td>
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<td>0.5</td>
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<td>A value between 0.1 and 1.0. This scales the vertical size of the graph
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When keepAspectRatio is set to false, and verticalRatio is set to 1.0,
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the graph will be a cube.</td>
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</tr>
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<tr>
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<td>width</td>
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<td>string</td>
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<td>"400px"</td>
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<td>The width of the graph in pixels or as a percentage.</td>
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</tr>
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<tr>
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<td>xBarWidth</td>
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<td>number</td>
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<td>none</td>
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<td>The width of bars in x direction. By default, the width is equal to the distance
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between the data points, such that bars adjoin each other.
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Only applicable for styles <code>"bar"</code> and <code>"bar-color"</code>.</td>
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</tr>
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<tr>
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<td>xCenter</td>
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<td>string</td>
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<td>"55%"</td>
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<td>The horizontal center position of the graph, as a percentage or in
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pixels.</td>
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</tr>
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<tr>
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<td>xMax</td>
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<td>number</td>
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<td>none</td>
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<td>The maximum value for the x-axis.</td>
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</tr>
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<tr>
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<td>xMin</td>
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<td>number</td>
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<td>none</td>
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<td>The minimum value for the x-axis.</td>
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</tr>
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<tr>
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<td>xStep</td>
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<td>number</td>
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<td>none</td>
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<td>Step size for the grid on the x-axis.</td>
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</tr>
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<tr>
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<td>yBarWidth</td>
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<td>number</td>
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<td>none</td>
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<td>The width of bars in y direction. By default, the width is equal to the distance
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between the data points, such that bars adjoin each other.
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Only applicable for styles <code>"bar"</code> and <code>"bar-color"</code>.</td>
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</tr>
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<tr>
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<td>yCenter</td>
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<td>string</td>
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<td>"45%"</td>
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<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>
|
|
|
|
</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>draw(data, options)</td>
|
|
<td>none</td>
|
|
<td>Loads data, sets the provided options, and draws the 3d graph.</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>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": 1.0, "vertical": 0.5, "distance": 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);
|
|
}
|
|
|
|
google.visualization.events.addListener(mygraph, '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>
|
|
|
|
<tr>
|
|
<td>ready</td>
|
|
<td>The graph is ready for external method calls.
|
|
If you want to interact with the graph, and call methods after you draw it,
|
|
you should set up a listener for this event before you call the draw method,
|
|
and call them only after the event was fired.</td>
|
|
<td>none</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>
|
|
|
|
</div>
|
|
</body>
|
|
</html>
|