NearestNeighbor.h

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#ifndef GfxTL__NEARESTNEIGHBOR_HEADER__
#define GfxTL__NEARESTNEIGHBOR_HEADER__
 
namespace GfxTL
{
 
    template <class ScalarT, class IndexT = size_t>
    struct NN
    {
        typedef ScalarT ScalarType;
        typedef IndexT IndexType;
        ScalarType sqrDist;
        IndexType index;
 
        NN()
        {
        }
 
        NN(ScalarType d, IndexType i) : sqrDist(d), index(i)
        {
        }
 
        bool
        operator<(const NN& nn) const
        {
            return sqrDist < nn.sqrDist;
        }
 
        bool
        operator>(const NN& nn) const
        {
            return sqrDist > nn.sqrDist;
        }
 
        bool
        operator<=(const NN& nn) const
        {
            return sqrDist <= nn.sqrDist;
        }
 
        bool
        operator>=(const NN& nn) const
        {
            return sqrDist >= nn.sqrDist;
        }
 
        bool
        operator==(const NN& nn) const
        {
            return sqrDist == nn.sqrDist && index == nn.index;
        }
 
        bool
        operator!=(const NN& nn) const
        {
            return sqrDist != nn.sqrDist || index != nn.index;
        }
 
        operator IndexType() const
        {
            return index;
        }
 
        operator IndexType&()
        {
            return index;
        }
 
        operator ScalarType() const
        {
            return sqrDist;
        }
    };
 
}; // namespace GfxTL
 
#endif