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27 lines
660 B
CoffeeScript
27 lines
660 B
CoffeeScript
Dropper = class Dropper
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lostFrames: 0.0
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dropCounter: 0
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constructor: ->
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@listener = (e) => @tick(e)
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tick: ->
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unless @tickedOnce
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@tickedOnce = true # Can't get measured FPS on the 0th frame.
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return
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--@dropCounter if @dropCounter > 0
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# Track number of frames we've lost since the last tick.
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fps = createjs.Ticker.getFPS()
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actual = createjs.Ticker.getMeasuredFPS(1)
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@lostFrames += (fps - actual) / fps
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# If lostFrames > 1, drop that number for the next tick.
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@dropCounter += parseInt @lostFrames
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@lostFrames = @lostFrames % 1
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drop: ->
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return @dropCounter > 0
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module.exports = new Dropper()
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