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/**
* @author mrdoob / http://mrdoob.com/
*/
var Stats = function () {
var startTime = Date.now(), prevTime = startTime;
var ms = 0, msMin = Infinity, msMax = 0;
var fps = 0, fpsMin = Infinity, fpsMax = 0;
var frames = 0, mode = 0;
var container = document.createElement( 'div' );
container.id = 'stats';
container.addEventListener( 'mousedown', function ( event ) { event.preventDefault(); setMode( ++ mode % 2 ) }, false );
container.style.cssText = 'width:80px;opacity:0.9;cursor:pointer';
var fpsDiv = document.createElement( 'div' );
fpsDiv.id = 'fps';
fpsDiv.style.cssText = 'padding:0 0 3px 3px;text-align:left;background-color:#002';
container.appendChild( fpsDiv );
var fpsText = document.createElement( 'div' );
fpsText.id = 'fpsText';
fpsText.style.cssText = 'color:#0ff;font-family:Helvetica,Arial,sans-serif;font-size:9px;font-weight:bold;line-height:15px';
fpsText.innerHTML = 'FPS';
fpsDiv.appendChild( fpsText );
var fpsGraph = document.createElement( 'div' );
fpsGraph.id = 'fpsGraph';
fpsGraph.style.cssText = 'position:relative;width:74px;height:30px;background-color:#0ff';
fpsDiv.appendChild( fpsGraph );
while ( fpsGraph.children.length < 74 ) {
var bar = document.createElement( 'span' );
bar.style.cssText = 'width:1px;height:30px;float:left;background-color:#113';
fpsGraph.appendChild( bar );
}
var msDiv = document.createElement( 'div' );
msDiv.id = 'ms';
msDiv.style.cssText = 'padding:0 0 3px 3px;text-align:left;background-color:#020;display:none';
container.appendChild( msDiv );
var msText = document.createElement( 'div' );
msText.id = 'msText';
msText.style.cssText = 'color:#0f0;font-family:Helvetica,Arial,sans-serif;font-size:9px;font-weight:bold;line-height:15px';
msText.innerHTML = 'MS';
msDiv.appendChild( msText );
var msGraph = document.createElement( 'div' );
msGraph.id = 'msGraph';
msGraph.style.cssText = 'position:relative;width:74px;height:30px;background-color:#0f0';
msDiv.appendChild( msGraph );
while ( msGraph.children.length < 74 ) {
var bar = document.createElement( 'span' );
bar.style.cssText = 'width:1px;height:30px;float:left;background-color:#131';
msGraph.appendChild( bar );
}
var setMode = function ( value ) {
mode = value;
switch ( mode ) {
case 0:
fpsDiv.style.display = 'block';
msDiv.style.display = 'none';
break;
case 1:
fpsDiv.style.display = 'none';
msDiv.style.display = 'block';
break;
}
}
var updateGraph = function ( dom, value ) {
var child = dom.appendChild( dom.firstChild );
child.style.height = value + 'px';
}
return {
REVISION: 11,
domElement: container,
setMode: setMode,
begin: function () {
startTime = Date.now();
},
end: function () {
var time = Date.now();
ms = time - startTime;
msMin = Math.min( msMin, ms );
msMax = Math.max( msMax, ms );
msText.textContent = ms + ' MS (' + msMin + '-' + msMax + ')';
updateGraph( msGraph, Math.min( 30, 30 - ( ms / 200 ) * 30 ) );
frames ++;
if ( time > prevTime + 1000 ) {
fps = Math.round( ( frames * 1000 ) / ( time - prevTime ) );
fpsMin = Math.min( fpsMin, fps );
fpsMax = Math.max( fpsMax, fps );
fpsText.textContent = fps + ' FPS (' + fpsMin + '-' + fpsMax + ')';
updateGraph( fpsGraph, Math.min( 30, 30 - ( fps / 100 ) * 30 ) );
prevTime = time;
frames = 0;
}
return time;
},
update: function () {
startTime = this.end();
}
}
};
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