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Timer: only update delta and elapsed time when document is visible #27651

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merged 2 commits into from
Jan 30, 2024
Merged

Timer: only update delta and elapsed time when document is visible #27651

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Timer: only update delta and elapsed time when document is visible
mrxz Jan 30, 2024
2b46157
Update Timer.js
Mugen87 Jan 30, 2024
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17 changes: 13 additions & 4 deletions examples/jsm/misc/Timer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -73,11 +73,20 @@ class Timer {

update( timestamp ) {

this._previousTime = this._currentTime;
this._currentTime = ( timestamp !== undefined ? timestamp : now() ) - this._startTime;

this._delta = ( this._currentTime - this._previousTime ) * this._timescale;
this._elapsed += this._delta; // _elapsed is the accumulation of all previous deltas
if ( this._usePageVisibilityAPI === true && document.hidden ) {

this._delta = 0;

} else {

this._previousTime = this._currentTime;
this._currentTime = ( timestamp !== undefined ? timestamp : now() ) - this._startTime;

this._delta = ( this._currentTime - this._previousTime ) * this._timescale;
this._elapsed += this._delta; // _elapsed is the accumulation of all previous deltas

}

return this;

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