Plane.hpp

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namespace GfxTL
{
    template< class PointT >
    Plane< PointT >::Plane()
    {}
 
    template< class PointT >
    Plane< PointT >::Plane(const PointType& normal, const PointType& origin)
        : _normal(normal)
    {
        _d = -(_normal * origin);
    }
 
    template< class PointT >
    void Plane< PointT >::Set(const PointType& origin, const PointType& normal)
    {
        _normal = normal;
        _d = -(_normal * origin);
    }
 
    template< class PointT >
    typename Plane< PointT >::ScalarType Plane< PointT >::SignedDistance(
        const PointType& p) const
    {
        return _normal * p + _d;
    }
 
    template< class PointT >
    void Plane< PointT >::Orient(const PointType& n)
    {
        ScalarType factor = Math< ScalarType >::Sign(_normal * n);
        _normal *= factor;
        _d *= factor;
    }
 
    template< class PointT >
    void Plane< PointT >::Project(const PointType& p, PointType* s) const
    {
        *s = p - SignedDistance(p) * _normal;
    }
 
    template< class PointT >
    void Plane< PointT >::Normal(PointType* normal) const
    {
        *normal = _normal;
    }
 
    template< class PointT >
    void Plane< PointT >::Normal(const PointType& normal)
    {
        _normal = normal;
    }
 
    template< class PointT >
    typename Plane< PointT >::PointType& Plane< PointT >::Normal()
    {
        return _normal;
    }
 
    template< class PointT >
    const typename Plane< PointT >::PointType& Plane< PointT >::Normal() const
    {
        return _normal;
    }
 
    template< class PointT >
    void Plane< PointT >::Origin(const PointType& o)
    {
        _d = -(_normal * o);
    }
 
    template< class PointT >
    typename Plane< PointT >::ScalarType Plane< PointT >::Intersect(
        const PointType& p, const PointType& r) const
    {
        return -SignedDistance(p) / (_normal * r);
    }
};