DynVectorKernel.h

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#ifndef GfxTL__DYNVECTORKERNEL_HEADER__
#define GfxTL__DYNVECTORKERNEL_HEADER__
 
namespace GfxTL
{
    template< class T >
    class DynVectorKernel
    {
    public:
        DynVectorKernel(unsigned int dim);
 
        void Add(const T a[], const T b[], T* r) const;
        T Dot(const T a[], const T b[]) const;
        T SqrDistance(const T a[], const T b[]) const;
 
    private:
        unsigned int m_dim;
    };
 
    template< class T >
    DynVectorKernel< T >::DynVectorKernel(unsigned int dim)
        : m_dim(dim)
    {}
 
    template< class T >
    void DynVectorKernel< T >::Add(const T a[], const T b[], T* r) const
    {
        for (unsigned int i = 0; i < m_dim; ++i)
        {
            r[i] = a[i] + b[i];
        }
    }
 
    template< class T >
    T DynVectorKernel< T >::Dot(const T a[], const T b[]) const
    {
        T r = a[0] * b[0];
        for (size_t i = 1; i < m_dim; ++i)
        {
            r += a[i] * b[i];
        }
        return r;
    }
 
    template< class T >
    T DynVectorKernel< T >::SqrDistance(const T a[], const T b[]) const
    {
        T r = 0, d;
        for (size_t i = 0; i < m_dim; ++i)
        {
            d = a[i] - b[i];
            r += d * d;
        }
        return r;
    }
};
 
#endif