Difference between revisions of "Animation of lines"

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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.
 
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.
 
<source lang="javascript">
 
<source lang="javascript">
var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10], axis: true, grid: false});
+
var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10], axis: true});
 
var p0 = brd.create('point', [0,0], {name:'T',trace:true});
 
var p0 = brd.create('point', [0,0], {name:'T',trace:true});
 
var p1 = brd.create('point', [7, 5], {name:'A',trace:true});
 
var p1 = brd.create('point', [7, 5], {name:'A',trace:true});

Latest revision as of 10:29, 7 June 2011

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});
var p0 = brd.create('point', [0,0], {name:'T',trace:true});
var p1 = brd.create('point', [7, 5], {name:'A',trace:true});
var p2 = brd.create('point', [5, 7], {name:'B',trace:true});
var l = brd.create('line', [p1,p2], {name:''});
var t = brd.create('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>