/**
* Computes the covariance matrix which is the linear interpolation between two matrices, by a fraction.
* \param a The first covariance matrix.
* \param fraction The scalar fraction at which the evaluate the linear interpolation.
* \param b The second covariance matrix.
* \return The interpolated covariance matrix.
*/
point_type move_position_toward(const point_type& a, double fraction, const point_type& b) const {
return point_type(matrix_type(value_type(1.0 - fraction) * a.get_matrix() + value_type(fraction) * b.get_matrix()));
};
point_difference_type(const point_type& aSrc,
const point_type& aDst) :
M(aSrc.get_matrix() - aDst.get_matrix()) { };
/**
* Adds a given covariance matrix difference to a given covariance matrix.
* \param a A covariance matrix.
* \param delta A covariance matrix difference to add to a.
* \return The adjusted covariance matrix.
*/
point_type adjust(const point_type& a, const point_difference_type& delta) const {
return point_type(matrix_type( a.get_matrix() + delta.M ));
};
