# Difference between revisions of "Point"

From JSXGraph Wiki

Jump to navigationJump to searchLine 30: | Line 30: | ||

<html> | <html> | ||

− | <div id=" | + | <div id="jxgbox3" class="jxgbox" style="width:500px; height:200px; float:left; "></div> |

<script type="text/javascript"> | <script type="text/javascript"> | ||

var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 200, originY: 100, unitX: 50, unitY: 50}); | var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 200, originY: 100, unitX: 50, unitY: 50}); |

## Revision as of 11:45, 17 September 2008

This example shows how to construct a simple, draggable point. It is produced by the following commands:

```
<div id="jxgbox" class="jxgbox" style="width:500px; height:200px; float:left; "></div>
<script type="text/javascript">
var board = JXG.JSXGraph.initBoard('jxgbox', {originX: 200, originY: 100, unitX: 50, unitY: 50});
var p = board.createElement('point',[1,1]);
</script>
```

The JavaScript code has to be placed AFTER the div element which will contain the construction. From now on, we will only show the JavaScript code.

### Attributes of a point

Several attributes can be given to change the properties of a point.

```
var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 200, originY: 100, unitX: 50, unitY: 50});
var p = b2.createElement('point',[1,1], {name:'X',style:5});
```

### Point styles

The property type of a point can attain the values 0..12. In this examples we use a for loop to create 13 points.

```
var b3 = JXG.JSXGraph.initBoard('jxgbox3', {originX: 40, originY: 100, unitX: 40, unitY: 40});
for (var i=0;i<13;i++) {
var p = b3.createElement('point',[i,0], {name:'P_'+i, style:i});
}
```

After creating the points we set the property fixed of the last point, P_12, to true. I.e. the point is no longer draggable.

```
p.setProperty({fixed:true});
```