three
Version:
JavaScript 3D library
70 lines (39 loc) • 993 B
JavaScript
/**
* @author alteredq / http://alteredqualia.com/
*/
THREE.Clock = function ( autoStart ) {
this.autoStart = ( autoStart !== undefined ) ? autoStart : true;
this.startTime = 0;
this.oldTime = 0;
this.elapsedTime = 0;
this.running = false;
};
THREE.Clock.prototype = {
constructor: THREE.Clock,
start: function () {
this.startTime = ( performance || Date ).now();
this.oldTime = this.startTime;
this.running = true;
},
stop: function () {
this.getElapsedTime();
this.running = false;
},
getElapsedTime: function () {
this.getDelta();
return this.elapsedTime;
},
getDelta: function () {
var diff = 0;
if ( this.autoStart && ! this.running ) {
this.start();
}
if ( this.running ) {
var newTime = ( performance || Date ).now();
diff = ( newTime - this.oldTime ) / 1000;
this.oldTime = newTime;
this.elapsedTime += diff;
}
return diff;
}
};