var window = window || {}; var self = self || {}; // High-resulution counter: emulate window.performance.now() for THREE.CLOCK if( window.performance === undefined ) { window.performance = { }; } if( ( window.performance.now === undefined ) && ( process !== undefined ) && ( process.hrtime !== undefined ) ) { window.performance.now = function () { var time = process.hrtime(); return ( time[0] + time[1] / 1e9 ) * 1000; }; }