# Difference between revisions of "Animation of lines"

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<source lang="html4strict"> | <source lang="html4strict"> | ||

<span onClick="startAnimation1()" style="color:blue">Click here, to start animation 1</span> | <span onClick="startAnimation1()" style="color:blue">Click here, to start animation 1</span> | ||

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</source> | </source> | ||

[[Category:Examples]] | [[Category:Examples]] |

## Revision as of 12:20, 14 February 2010

Click here, to start animation

### The JavaScript code

The point "p0" controls the movement of the line. The coordinates of p0 define a transformation (translation). This transformation is applied to the points p1 and p2. Of course, p0 should be hidden.

```
var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10], axis: true, grid: false});
var p0 = brd.createElement('point', [0,0], {name:'T',trace:true});
var p1 = brd.createElement('point', [7, 5], {name:'A',trace:true});
var p2 = brd.createElement('point', [5, 7], {name:'B',trace:true});
var l = brd.createElement('line', [p1,p2], {name:''});
var t = brd.createElement('transform', [function(){return p0.X();},function(){return p0.Y();}], {type:'translate'});
t.bindTo([p1,p2]); // The translation is bound to the points, but the points are not updated, yet
function startAnimation1() {
p0.moveTo([-5,-8],1500);
}
```

```
<span onClick="startAnimation1()" style="color:blue">Click here, to start animation 1</span>
```