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{
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{
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    template<typename ITEM, typename ITEMID>
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    template<typename ITEM, typename ITEMID>
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    class AttributeVector
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    class AttributeVector
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    {
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    {
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    public:
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    public:
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        /// Construct from optional size and item (size should be identical to number of entities in associated container
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        AttributeVector(size_t _size = 0, ITEM item = ITEM());
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        AttributeVector(size_t _size = 0, ITEM item = ITEM());
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        /// Add an item (possibly not necessary
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        ITEMID add(const ITEM& item);
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       // ITEMID add(const ITEM& item);
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        // just returning should be ok; manifold and attribs should always be in sync.
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        // const context means manifold and attribs should be const, hence in sync.
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        /// const reference to item given by ID
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        const ITEM& get(ITEMID id) const;
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        const ITEM& get(ITEMID id) const;
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        /// reference to item given by ID
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        ITEM& get(ITEMID id);
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        ITEM& get(ITEMID id);
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        /// const reference to item given by ID
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        const ITEM& operator [](ITEMID id) const;
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        const ITEM& operator [](ITEMID id) const;
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        /// reference to item given by ID
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        ITEM& operator [](ITEMID id);
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        ITEM& operator [](ITEMID id);
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        /// resize the vector (may be necessary if associated container size grows
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        void resize(size_t _size, ITEM item = ITEM());
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        void resize(size_t _size, ITEM item = ITEM());
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        /// number of attribute items in vector
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        size_t size() const;
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        size_t size() const;
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        /// clear the vector
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        void clear();
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        void clear();
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        /// clenup unused items from the vector, given by remap from associated container
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        void cleanup(const std::map<ITEMID, ITEMID>& map);
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        void cleanup(const std::map<ITEMID, ITEMID>& map);
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    private:
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    private:
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        std::vector<ITEM> items;
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        std::vector<ITEM> items;
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    };
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    };
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    template<typename ITEM, typename ITEMID>
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    template<typename ITEM, typename ITEMID>
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    inline size_t AttributeVector<ITEM, ITEMID>::size() const
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    inline size_t AttributeVector<ITEM, ITEMID>::size() const
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    { return items.size(); }
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    { return items.size(); }
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    template<typename ITEM, typename ITEMID>
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    //template<typename ITEM, typename ITEMID>
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    inline ITEMID AttributeVector<ITEM, ITEMID>::add(const ITEM& item)
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   // inline ITEMID AttributeVector<ITEM, ITEMID>::add(const ITEM& item)
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    { items.push_back(item); return items.size() - 1; }
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    //{ items.push_back(item); return items.size() - 1; }
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    // just returning should be ok; manifold and attribs should always be in sync.
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    // const context means manifold and attribs should be const, hence in sync.
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    template<typename ITEM, typename ITEMID>
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    template<typename ITEM, typename ITEMID>
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    inline const ITEM& AttributeVector<ITEM, ITEMID>::get(ITEMID id) const
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    inline const ITEM& AttributeVector<ITEM, ITEMID>::get(ITEMID id) const
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    {
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    {
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        assert(id.index < items.size());
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        assert(id.index < items.size());
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        return items[id.index];
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        return items[id.index];