====== A poster that changes texture when used ======
\\
> This data works with "**Virtual Cast 1.5.1a and later**".

=== Example data ===
https://virtualcast.jp/products/92a21f83e35159f9faedf0436043e6c7a3dbb75e0b1d5fef5408568578bffc01



You can switch the texture by pressing the grip button.

{{vci:sample:material:board.png?400|}}

As shown in the image below, prepare a 3-by-3 texture and use\\
**vci.assets._ALL_SetMaterialTextureOffsetFromIndex** to shift the UV offset.

The same change can be done using **vci.assets._ALL_SetMaterialTextureOffsetFromName** which specifies a Material by its name.\\
The material in the example can be specified by the name "board_5tai7".

{{vci:sample:material:board_5tai7.png?400|}}

The UV of the picture side of the poster is set to a cell of the 3-by-3 matrix grid.\\
(To set the UV, use 3D modeling software like blender and Maya)

{{vci:sample:material:uv_sample.png?400|}}

<file lua main.lua>
local assets = vci.assets
local count = 0
if vci.state.Get("COUNT") then
    count = vci.state.Get("COUNT")
end
local TOTAL = 6

function SetTextureOffset( count )
    local offset = Vector2.zero

    -- y shift
    local Yshift = math.floor(count / 3)
    offset.y = -(1/3) * Yshift

    -- x shift
    local Xshift = count % 3
    offset.x = (1/3) * Xshift

    assets._ALL_SetMaterialTextureOffsetFromIndex(0, offset)
end
SetTextureOffset(count)

function onUse(use)
    if count >= TOTAL-1 then
        count = 0
    else
        count = count + 1
    end
    vci.state.Set("COUNT", count)
    SetTextureOffset(count)
end
</file>