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@tanepiper
Created December 5, 2012 13:47
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A high resolution timer, set the tick duration (default 1s) and callback to be actioned on each tick - accurate to within ~1-5ms per tick and compensates automatically for drift over time.
var HighResolutionTimer = window.HighResolutionTimer = window.HighResolutionTimer || (function() {
var HighResolutionTimer = function(options) {
this.timer = false;
this.total_ticks = 0;
this.start_time = undefined;
this.current_time = undefined;
this.duration = (options.duration) ? options.duration : 1000;
this.callback = (options.callback) ? options.callback : function() {};
this.run = function() {
this.current_time = Date.now();
if (!this.start_time) { this.start_time = this.current_time; }
this.callback(this);
var nextTick = this.duration - (this.current_time - (this.start_time + (this.total_ticks * this.duration) ) );
this.total_ticks++;
(function(i) {
i.timer = setTimeout(function() {
i.run();
}, nextTick);
}(this));
return this;
};
this.stop = function(){
clearTimeout(this.timer);
return this;
};
return this;
};
return HighResolutionTimer;
}());
var _timer = HighResolutionTimer({
duration: 1000,
callback: function(timer) {
var hours = Math.floor( ( ( (1000 / timer.duration) * timer.total_ticks) / 60) / 24) % 24;
var minutes = Math.floor( ( (1000 / timer.duration) * timer.total_ticks) / 60) % 60;
var seconds = ( (1000 / timer.duration) * timer.total_ticks) % 60;
console.log(hours, minutes, seconds);
}
});
@srghma
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srghma commented Feb 1, 2019

example is wrong

it should be

 var _timer = new HighResolutionTimer({
    duration: 1000,
    callback: function(timer) {
      var hours = Math.floor( ( ( (1000 / timer.duration) * timer.total_ticks) / 60) / 24) % 24;
      var minutes = Math.floor( ( (1000 / timer.duration) * timer.total_ticks) / 60) % 60;
      var seconds = ( (1000 / timer.duration) * timer.total_ticks) % 60;
      console.log(hours, minutes, seconds);
    }
});

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