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<html>
<head>
<title>JSXGraph example</title>
<link rel="stylesheet" type="text/css" href="../distrib/jsxgraph.css" />
<!--<script type="text/javascript" src="/javascript/prototype/prototype.js"></script>-->
<script type="text/javascript" src="../distrib/jsxgraphcore.js"></script>
</head>
<body>
<h2>Images</h2>
<div id="jxgbox" class="jxgbox" style="width:700px; height:500px;"></div>
<div id="debug" style="display:block;"></div>
<script type="text/javascript">
/* <![CDATA[ */
//(function(){
var p0, p1, picStr, board;
picStr = "http://easyimup.de/uploads/garfield-1069_e254457.gif";
//picStr = "./uccellino.jpg";
picStr = "./fagiolo.jpg";
board = JXG.JSXGraph.initBoard('jxgbox', {originX: 250, originY: 250, unitX: 40, unitY: 40, axis:true, grid:true});
var p0 = board.create('point', [-1,0], {style:5, name:'opacity'});
/*
var p1 = board.create('point', [3,0], {style:5, name:'rot+scale'});
var li = board.create('line', [p0,p1]);
*/
var p1 = board.create('point', [1,1]);
var p2 = board.create('point', [4,3]);
var im = board.create('image',[picStr,
[function(){return p1.X()}, function(){return p1.Y(); }],
[function(){return p2.X() - p1.X()}, function(){return p2.Y() - p1.Y(); }]],
{id:'imx',
opacity: function(){ return Math.exp(-Math.abs(p0.X())*0.4);},
rotate:0,
frozen:false });
/*
//
// Translate image and point "rot+scale" by freagging point "offset"
var tOff = board.create('transform', [function(){return p0.X()},function(){return p0.Y()}], {type:'translate'});
tOff.bindTo(im);
tOff.bindTo(p1);
// Rotate image around point "offset" by dragging point "rot+scale"
var tRot = board.create('transform', [function(){return Math.atan2(p1.Y()-p0.Y(),p1.X()-p0.X())}, p0], {type:'rotate'});
tRot.bindTo(im);
// Scale image by dragging point "rot+scale"
// We do this by moving the image back to the origin (inverse of transformation tOff),
// then scale the image (because scaling "starts from (0,0))
// Finally, we move the image back to point "Offset"
var tOffInv = board.create('transform', [function(){return -p0.X()},function(){return -p0.Y()}], {type:'translate'});
var tScale = board.create('transform', [function(){return p1.Dist(p0)/3;},
function(){return p1.Dist(p0)/3;}], {type:'scale'});
tOffInv.bindTo(im); tScale.bindTo(im); tOff.bindTo(im);
//board.update();
*/
//})();
/* ]]> */
</script>
</body>
</html>
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