CellLevelTreeStrategy.h

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#ifndef GfxTL__CELLLEVELTREESTRATEGY_HEADER__
#define GfxTL__CELLLEVELTREESTRATEGY_HEADER__
 
namespace GfxTL
{
    template <class InheritedStrategyT>
    struct CellLevelTreeStrategy
    {
        typedef typename InheritedStrategyT::value_type value_type;
 
        class CellData : public InheritedStrategyT::CellData
        {
        public:
            const size_t
            Level() const
            {
                return m_level;
            }
 
            void
            Level(size_t l)
            {
                m_level = l;
            }
 
        private:
            size_t m_level;
        };
 
        template <class BaseT>
        class StrategyBase : public InheritedStrategyT::template StrategyBase<BaseT>
        {
        public:
            typedef typename InheritedStrategyT::template StrategyBase<BaseT> BaseType;
            typedef typename BaseType::CellType CellType;
 
        protected:
            class BuildInformation : public BaseType::BuildInformation
            {
            public:
                size_t
                Level() const
                {
                    return m_level;
                }
 
                void
                Level(size_t l)
                {
                    m_level = l;
                }
 
            private:
                size_t m_level;
            };
 
            template <class BaseTraversalT>
            class CellLevelTraversalInformation : public BaseTraversalT
            {
            };
 
            template <class BuildInformationT>
            void
            InitRootBuildInformation(BuildInformationT* bi)
            {
                BaseType::InitRootBuildInformation(bi);
                bi->Level(0);
            }
 
            template <class BuildInformationT>
            void
            InitBuildInformation(const CellType& parent,
                                 const BuildInformationT& parentInfo,
                                 unsigned int childIdx,
                                 BuildInformationT* bi) const
            {
                BaseType::InitBuildInformation(parent, parentInfo, childIdx, bi);
                bi->Level(parentInfo.Level() + 1);
            }
 
            template <class BuildInformationT>
            void
            InitRoot(const BuildInformationT& bi, CellType* root)
            {
                BaseType::InitRoot(bi, root);
                root->Level(bi.Level());
            }
 
            template <class BuildInformationT>
            void
            InitCell(const CellType& parent,
                     const BuildInformationT& pbi,
                     unsigned int child,
                     const BuildInformationT& bi,
                     CellType* cell)
            {
                BaseType::InitCell(parent, pbi, child, bi, cell);
                cell->Level(bi.Level());
            }
 
            template <class TraversalInformationT>
            const size_t
            CellLevel(const CellType& cell, const TraversalInformationT&) const
            {
                return cell.Level();
            }
        };
    };
}; // namespace GfxTL
 
#endif