# Difference between revisions of "Bounding box"

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− | + | The bounding box defines the viewport of the board, i.e. the portion of the <math>\mathbb{R}^2</math> that is shown. The JavaScript code | |

− | |||

− | < | ||

− | </ | ||

− | The JavaScript code | ||

<source lang="javascript"> | <source lang="javascript"> | ||

var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,10,5,-2], keepaspectratio: true, axis:true}); | var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,10,5,-2], keepaspectratio: true, axis:true}); |

## Revision as of 13:27, 31 January 2013

The bounding box defines the viewport of the board, i.e. the portion of the [math]\mathbb{R}^2[/math] that is shown. The JavaScript code

```
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,10,5,-2], keepaspectratio: true, axis:true});
```

sets the vertical and horizontal units and the position of the origin such that the upper left corner of the drawing panel has position (-5,10) and the lower right corner of the drawing panel has position (5,-2).

The source code of the page looks like this:

```
<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
<div id="jxgbox" class="jxgbox" style="width:500px; height:500px;"></div>
<script type="text/javascript">
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,10,5,-2], axis:true});
</script>
```