74 lines
1.0 KiB
JavaScript
74 lines
1.0 KiB
JavaScript
/**
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* @author alteredq / http://alteredqualia.com/
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*/
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function Clock( autoStart ) {
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this.autoStart = ( autoStart !== undefined ) ? autoStart : true;
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this.startTime = 0;
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this.oldTime = 0;
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this.elapsedTime = 0;
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this.running = false;
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}
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Object.assign( Clock.prototype, {
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start: function () {
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this.startTime = ( typeof performance === 'undefined' ? Date : performance ).now(); // see #10732
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this.oldTime = this.startTime;
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this.elapsedTime = 0;
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this.running = true;
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},
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stop: function () {
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this.getElapsedTime();
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this.running = false;
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this.autoStart = false;
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},
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getElapsedTime: function () {
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this.getDelta();
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return this.elapsedTime;
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},
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getDelta: function () {
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var diff = 0;
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if ( this.autoStart && ! this.running ) {
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this.start();
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return 0;
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}
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if ( this.running ) {
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var newTime = ( typeof performance === 'undefined' ? Date : performance ).now();
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diff = ( newTime - this.oldTime ) / 1000;
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this.oldTime = newTime;
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this.elapsedTime += diff;
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}
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return diff;
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}
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} );
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export { Clock };
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