unity lua实现fps

local UIManager=require"uimanager"

local m_UpdateInterval=1
local m_Accum=0
local m_Frames=0
local m_TimeLeft=0

local function update()
    m_TimeLeft = m_TimeLeft-Time.deltaTime
    m_Accum = m_Accum+(Time.timeScale / Time.deltaTime)
    m_Frames=m_Frames+1
    if (m_TimeLeft <= 0) then        
        if UIManager.isshow("dlguimain") then
            local fps = m_Accum/m_Frames
            local str = string.format("FPS:%.2f",fps)
            UIManager.call("dlguimain","RefreshFPS",str)   
        end
        m_TimeLeft = m_UpdateInterval
        m_Accum =0
        m_Frames = 0  
    end  
end

local function init()
    m_TimeLeft = m_UpdateInterval
    gameevent.evt_update:add(update)
end

return{
    init = init,
    update = update,
}

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