nc_contraptions/vector_extensions.lua

local setmetatable, minetest, vector
    = setmetatable, minetest, vector

-- Creates a vector using `get_position_from_hash` from the specified `hash`.
function vector.from_hash(hash)
    return setmetatable(minetest.get_position_from_hash(hash), vector.metatable)
end

-- Returns the integer hash of this vector using `hash_node_position`.
function vector:hash()
    return minetest.hash_node_position(self)
end

-- Returns vector components from the specified arguments.
-- * `(x, y, z)` returns `x, y, z`.
-- * `(number)` returns `n, n, n`.
-- * `(table)` returns `t.x, t.y, t.z`.
-- * `(array)` returns `t[1], t[2], t[3]`.
-- * Unexpected input returns undefined output.
function vector.get(x, y, z)
    if z then return x, y, z end
    if type(x) == "number" then return x, x, x end
    if x.z then return x.x, x.y, x.z end
    return x[1], x[2], x[3]
end