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/* ----------------------------------------------------------------------- *
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 * This file is part of GEL, www.imm.dtu.dk/GEL
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 * Copyright (C) the authors (see AUTHORS.txt) and DTU Informatics
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 *
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 * Principal authors:
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 *  Christian Thode Larsen (thode2d@gmail.com)
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 *  J. Andreas Baerentzen (jab@imm.dtu.dk)
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 *
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 * See LICENSE.txt for licensing information
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 * ----------------------------------------------------------------------- */
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#ifndef __HMESH_ATTRIBUTEVECTOR_H__
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#define __HMESH_ATTRIBUTEVECTOR_H__
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#include <cassert>
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#include <vector>
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#include <map>
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namespace HMesh
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{
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    template<typename ITEM, typename ITEMID>
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    class AttributeVector
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    {
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    public:
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        AttributeVector(size_t _size = 0, ITEM 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 ITEM& get(ITEMID id) const;
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        ITEM& get(ITEMID id);
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        const ITEM& operator [](ITEMID id) const;
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        ITEM& operator [](ITEMID id);
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        void resize(size_t _size, ITEM item = ITEM());
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        size_t size() const;
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        void clear();
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        void cleanup(const std::map<ITEMID, ITEMID>& map);
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    private:
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        std::vector<ITEM> items;
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    };
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    template<typename ITEM>
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    class VertexAttributeVector : public AttributeVector<ITEM, VertexID>
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    {
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    public:
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        VertexAttributeVector(size_t _size = 0, ITEM item = ITEM());
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    };
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    template<typename ITEM>
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    class FaceAttributeVector : public AttributeVector<ITEM, FaceID>
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    {
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    public:
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        FaceAttributeVector(size_t _size = 0, ITEM item = ITEM());
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    };
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    template<typename ITEM>
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    class HalfEdgeAttributeVector : public AttributeVector<ITEM, HalfEdgeID>
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    {
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    public:
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        HalfEdgeAttributeVector(size_t _size = 0, ITEM item = ITEM());
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    };
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    template<typename ITEM>
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    inline VertexAttributeVector<ITEM>::VertexAttributeVector(size_t _size, ITEM item) : AttributeVector<ITEM, VertexID>(_size, item){}
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    template<typename ITEM>
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    inline FaceAttributeVector<ITEM>::FaceAttributeVector(size_t _size, ITEM item) : AttributeVector<ITEM, FaceID>(_size, item){}
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    template<typename ITEM>
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    inline HalfEdgeAttributeVector<ITEM>::HalfEdgeAttributeVector(size_t _size, ITEM item) : AttributeVector<ITEM, HalfEdgeID>(_size, item){}
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    template<typename ITEM, typename ITEMID>
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    inline AttributeVector<ITEM, ITEMID>::AttributeVector(size_t _size, ITEM item) : items(_size, item){}
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    template<typename ITEM, typename ITEMID>
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    inline void AttributeVector<ITEM, ITEMID>::clear()
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    { items.clear(); }
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    template<typename ITEM, typename ITEMID>
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    inline void AttributeVector<ITEM, ITEMID>::cleanup(const std::map<ITEMID, ITEMID>& remap)
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    {
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        std::vector<ITEM> new_items(remap.size());
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        for(std::map<ITEMID, ITEMID>::const_iterator it = remap.begin(); it != remap.end(); ++it){
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            assert(it->second.index < remap.size());
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            new_items[it->second.index] = items[it->first.index];
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        }
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        std::swap(items, new_items);
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    }
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    template<typename ITEM, typename ITEMID>
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    inline void AttributeVector<ITEM, ITEMID>::resize(size_t _size, ITEM item)
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    { items.resize(_size, item); }
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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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    { return items.size(); }
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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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    { items.push_back(item); return items.size() - 1; }
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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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    {
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        assert(id.index < items.size());
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        return items[id.index];
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    }
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    template<typename ITEM, typename ITEMID>
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    inline ITEM& AttributeVector<ITEM, ITEMID>::get(ITEMID id)
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    {
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        if(items.size() < id.idx())
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            items.resize(id.index + 1);
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        return items[id.index];
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    }
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    template<typename ITEM, typename ITEMID>
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    inline const ITEM& AttributeVector<ITEM, ITEMID>::operator [](ITEMID id) const
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    {
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        assert(id.index < items.size());
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        return items[id.index];
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    }
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    template<typename ITEM, typename ITEMID>
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    inline ITEM& AttributeVector<ITEM, ITEMID>::operator [](ITEMID id)
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    {
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        if(items.size() < id.index)
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            items.resize(id.index + 1);
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        return items[id.index];
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    }
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}
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#endif