webglFramework/Thirdparty/three.js-master/src/core/Clock.js

   1 /**
   2  * @author alteredq / http://alteredqualia.com/
   3  */
   4
   5 function Clock( autoStart ) {
   6
   7         this.autoStart = ( autoStart !== undefined ) ? autoStart : true;
   8
   9         this.startTime = 0;
  10         this.oldTime = 0;
  11         this.elapsedTime = 0;
  12
  13         this.running = false;
  14
  15 }
  16
  17 Object.assign( Clock.prototype, {
  18
  19         start: function () {
  20
  21                 this.startTime = ( typeof performance === 'undefined' ? Date : performance ).now(); // see #10732
  22
  23                 this.oldTime = this.startTime;
  24                 this.elapsedTime = 0;
  25                 this.running = true;
  26
  27         },
  28
  29         stop: function () {
  30
  31                 this.getElapsedTime();
  32                 this.running = false;
  33                 this.autoStart = false;
  34
  35         },
  36
  37         getElapsedTime: function () {
  38
  39                 this.getDelta();
  40                 return this.elapsedTime;
  41
  42         },
  43
  44         getDelta: function () {
  45
  46                 var diff = 0;
  47
  48                 if ( this.autoStart && ! this.running ) {
  49
  50                         this.start();
  51                         return 0;
  52
  53                 }
  54
  55                 if ( this.running ) {
  56
  57                         var newTime = ( typeof performance === 'undefined' ? Date : performance ).now();
  58
  59                         diff = ( newTime - this.oldTime ) / 1000;
  60                         this.oldTime = newTime;
  61
  62                         this.elapsedTime += diff;
  63
  64                 }
  65
  66                 return diff;
  67
  68         }
  69
  70 } );
  71
  72
  73 export { Clock };