function advtrains.register_platform(modprefix, preset)
    local ndef=minetest.registered_nodes[preset]
    if not ndef then 
        minetest.log("warning", " register_platform couldn't find preset node "..preset)
        return
    end
    local btex=ndef.tiles
    if type(btex)=="table" then
        btex=btex[1]
    end
    local desc=ndef.description or ""
    local nodename=string.match(preset, ":(.+)$")
    minetest.register_node(modprefix .. ":platform_low_"..nodename, {
        description = attrans("@1 Platform (low)", desc),
        tiles = {btex.."^advtrains_platform.png", btex, btex, btex, btex, btex},
        groups = {cracky = 1, not_blocking_trains = 1, platform=1},
        sounds = default.node_sound_stone_defaults(),
        drawtype = "nodebox",
        node_box = {
            type = "fixed",
            fixed = {
                {-0.5, -0.1, -0.1, 0.5,  0  , 0.5},
                {-0.5, -0.5,  0  , 0.5, -0.1, 0.5}
            },
        },
        paramtype2="facedir",
        paramtype = "light",
        sunlight_propagates = true,
    })
    minetest.register_node(modprefix .. ":platform_high_"..nodename, {
        description = attrans("@1 Platform (high)", desc),
        tiles = {btex.."^advtrains_platform.png", btex, btex, btex, btex, btex},
        groups = {cracky = 1, not_blocking_trains = 1, platform=2},
        sounds = default.node_sound_stone_defaults(),
        drawtype = "nodebox",
        node_box = {
            type = "fixed",
            fixed = {
                {-0.5,  0.3, -0.1, 0.5,  0.5, 0.5},
                {-0.5, -0.5,  0  , 0.5,  0.3, 0.5}
            },
        },
        paramtype2="facedir",
        paramtype = "light",
        sunlight_propagates = true,
    })
    minetest.register_craft({
        type="shapeless",
        output = modprefix .. ":platform_high_"..nodename.." 4",
        recipe = {
            "dye:yellow", preset, preset
        },
    })
    minetest.register_craft({
        type="shapeless",
        output = modprefix .. ":platform_low_"..nodename.." 4",
        recipe = {
            "dye:yellow", preset
        },
    })
end