local assets = vci.assets
local count = 0

local timecount=0

--共通変数による同期管理部分
if vci.state.Get("COUNT") then
    count = vci.state.Get("COUNT")
end


--全体の切り替え枚数  今回は4X4
local TOTAL = 16
 
--縦と横の分割数 4 
function SetTextureOffset( count )
    local offset = Vector2.zero

    -- y shift
    local Yshift = math.floor(count / 4)
    offset.y = -(1/4) * Yshift
 
    -- x shift
    local Xshift = count % 4
    offset.x = (1/4) * Xshift
 
    assets.material._ALL_SetTextureOffsetFromIndex(0, offset)
end

SetTextureOffset(count)
 
function update()
    timecount=timecount+1
    --何フレームごとに画像を切り替えるか
    if timecount>3 then
        anim()
        timecount=0
    end
end

--自作関数
function anim()
    if count >= TOTAL then
        count = 0
    else
        count = count + 1
    end
    vci.state.Set("COUNT", count)
    SetTextureOffset(count)
end