forked from sent/waves
118 lines
2.2 KiB
CoffeeScript
118 lines
2.2 KiB
CoffeeScript
###
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new Date().getTime() wrapper to use as timer.
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@class bkcore.Timer
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@author Thibaut 'BKcore' Despoulain <http://bkcore.com>
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###
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class Timer
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###
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Creates a new timer, inactive by default.
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Call Timer.start() to activate.
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###
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constructor: ()->
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@time =
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start: 0
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current: 0
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previous: 0
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elapsed: 0
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delta: 0
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@active = false
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###
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Starts/restarts the timer.
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###
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start: ()->
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now = (new Date).getTime()
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@time.start = now
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@time.current = now
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@time.previous = now
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@time.elapsed = 0
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@time.delta = 0
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@active = true
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###
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Pauses(true)/Unpauses(false) the timer.
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@param bool Do pause
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###
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pause: (doPause)->
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@active = not doPause
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###
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Update method to be called inside a RAF loop
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###
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update: ()->
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if not @active then return
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now = (new Date).getTime()
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@time.current = now
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@time.elapsed = @time.current - @time.start
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@time.delta = now - @time.previous
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@time.previous = now
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###
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Returns a formatted version of the current elapsed time using msToTime().
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###
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getElapsedTime: ()->
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return @constructor.msToTime(@time.elapsed)
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###
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Formats a millisecond integer into a h/m/s/ms object
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@param x int In milliseconds
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@return Object{h,m,s,ms}
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###
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@msToTime: (t)->
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ms = t%1000
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s = Math.floor((t/1000)%60)
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m = Math.floor((t/60000)%60)
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h = Math.floor(t/3600000)
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return {h:h, m:m, s:s, ms,ms}
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###
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Formats a millisecond integer into a h/m/s/ms object with prefix zeros
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@param x int In milliseconds
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@return Object<string>{h,m,s,ms}
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###
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@msToTimeString: (t)->
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time = @msToTime(t)
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time.h = @zfill(time.h, 2)
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time.m = @zfill(time.m, 2)
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time.s = @zfill(time.s, 2)
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time.ms = @zfill(time.ms, 4)
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return time
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###
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Convert given integer to string and fill with heading zeros
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@param num int Number to convert/fill
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@param size int Desired string size
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###
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@zfill: (num, size)->
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len = size - num.toString().length
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return if len > 0 then new Array(len+1).join('0') + num else num.toString()
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###
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Exports
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@package bkcore
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###
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exports = exports ? @
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exports.bkcore ||= {}
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exports.bkcore.Timer = Timer |