tiles_layer2={
    surf = nil,
    tiles = {},
}

function tiles_layer2.new(_hab, _x, _y, _tx, _ty, _tw, _th)
    local world_x, world_y = coords.room_to_world(_hab,_x,_y)
    print(world_x.." "..world_y)
    table.insert( 
        tiles_layer2.tiles,
        { hab = _hab,
            x = world_x,
            y = world_y,
            w = _tw,
            h = _th,
            tx = _tx,
            ty = _ty,
            tw = _tw,
            th = _th,
        }
    )
end

function tiles_layer2.draw()
    for i, tile in ipairs(tiles_layer2.tiles) do
        if viewp:inside(tile.x, tile.y, tile.w, tile.h) then
            local curr_surf = surf.source() 
            if tiles_layer2.surf ~= nil then
                surf.source(tiles_layer2.surf)
            end
            local scr_x, scr_y = viewp:screen_coords( tile.x, tile.y )
            draw.surf(tile.tx, tile.ty, tile.tw, tile.th,
                      scr_x, scr_y, tile.tw, tile.th)
            surf.source(curr_surf)
        end
    end
end

function tiles_layer2.update()

end