mirror of
https://github.com/codeninjasllc/codecombat.git
synced 2024-11-24 08:08:15 -05:00
29 lines
701 B
CoffeeScript
29 lines
701 B
CoffeeScript
|
Dropper = class Dropper
|
||
|
|
lost_frames: 0.0
|
||
|
|
drop_counter: 0
|
||
|
|
|
||
|
|
constructor: ->
|
||
|
|
@listener = (e) => @tick(e)
|
||
|
|
|
||
|
|
tick: ->
|
||
|
|
unless @tickedOnce
|
||
|
|
@tickedOnce = true # Can't get measured FPS on the 0th frame
|
||
|
|
return
|
||
|
|
|
||
|
|
# decrement drop counter
|
||
|
|
@drop_counter -= 1 if @drop_counter > 0
|
||
|
|
|
||
|
|
# track number of frames we've lost since the last tick
|
||
|
|
fps = createjs.Ticker.getFPS()
|
||
|
|
actual = createjs.Ticker.getMeasuredFPS(1)
|
||
|
|
@lost_frames += (fps - actual) / fps
|
||
|
|
|
||
|
|
# if lost_frames > 1, drop that number for the next tick
|
||
|
|
@drop_counter += parseInt(@lost_frames)
|
||
|
|
@lost_frames = @lost_frames % 1
|
||
|
|
|
||
|
|
drop: ->
|
||
|
|
return @drop_counter > 0
|
||
|
|
|
||
|
|
module.exports = new Dropper()
|