var g_animationManager = new AnimationManager( 90 );
var g_current_slide = 0;
var g_slides = [];
/*
var g_directions = [
{ sx: [ -30, 0 ], ex: [ 5, 40 ], sy: [ -30, 0 ], ey: [ 5, 40 ] }, // nw -> se
{ sx: [ 5, 40 ], ex: [ -30, 0 ], sy: [ 5, 40 ], ey: [ -30, 0 ] }, // ne -> sw
{ sx: [ 5, 40 ], ex: [ -30, 0 ], sy: [ 5, 40 ], ey: [ -30, 0 ] }, // se -> nw
{ sx: [ -30, 0 ], ex: [ 5, 40 ], sy: [ 5, 40 ], ey: [ -30, 0 ] } // sw -> ne
];

*/
  
var g_directions = [
{ sx: [ -20, -30 ], ex: [ 30, 40 ], sy: [ -30, -20], ey: [ 30, 40 ] }, // nw -> se
{ sx: [ 30, 40 ], ex: [ -30, -20 ], sy: [ 30, 40 ], ey: [ -30, -20 ] }, // ne -> sw
{ sx: [ 30, 40 ], ex: [ -30, -20 ], sy: [ 30, 40 ], ey: [ -30, -20 ] }, // se -> nw
{ sx: [ -30, -20 ], ex: [ 30, 40 ], sy: [ 30, 40 ], ey: [ -30, -20 ] } // sw -> ne
];



g_animationManager.on_finished = function()
{
  g_current_slide++;
  if ( g_current_slide >= g_slides.length )
    g_current_slide = 0;
  g_slides[ g_current_slide ].start();
}

/*
function rnd( start, end )
{
  return ( Math.random() * ( end - start ) ) + start;
}
*/


rnd.today = new Date();
rnd.seed  = rnd.today.getTime();

function seeded_rnd() {
   rnd.seed = (rnd.seed*9301+49297) % 233280;
   return rnd.seed/(233280.0);
}

function rnd(start, end) {
   return ( seeded_rnd() * ( end - start ) ) + start;

//   return Math.ceil( rnd()* (end - start ) number);
}


function load_slides( images )
{
  var ic = document.getElementById( 'imgContainer' );

  for( var i in images )
  {
    var img = images[i];

    var imgObj = document.createElement( 'img' );
    imgObj.style.position = 'absolute';
    imgObj.style.left = '0px';
    imgObj.style.top = '0px';
    imgObj.style.visibility = 'hidden';
    imgObj.style.border = 'none';
    ic.appendChild( imgObj );

    var ii = new ImageInfo( img.src, img.width, img.height, imgObj );

//  var szoom = rnd( 50, 100 );
  var szoom = rnd( 30, 90 );
  var ezoom = rnd( 70, 120 );

  var d = parseInt( ( seeded_rnd() * g_directions.length ).toString() );
  var di = g_directions[ d ];
  var sx = rnd( di.sx[0], di.sx[1] );
  var sy = rnd( di.sy[0], di.sy[1] );
  var ex = rnd( di.ex[0], di.ex[1] );
  var ey = rnd( di.ey[0], di.ey[1] );

    g_slides.push( 
      new Animation( g_animationManager, ii, 10,
    [ new KenBurnsZoomer( ii, szoom, ezoom, ic.clientWidth, ic.clientHeight ),
      new KenBurnsMover( ii, sx, sy, ex, ey, ic.clientWidth, ic.clientHeight ),
          new KenBurnsFader( ii, 30 ) ] )
    );
  }
}

function start_slides()
{
  g_slides[ g_current_slide ].start();
}