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- // Copyright Nick Thompson, 2019
- // Use, modification and distribution are subject to the
- // Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt
- // or copy at http://www.boost.org/LICENSE_1_0.txt)
- #ifndef BOOST_MATH_INTERPOLATORS_CARDINAL_QUINTIC_B_SPLINE_HPP
- #define BOOST_MATH_INTERPOLATORS_CARDINAL_QUINTIC_B_SPLINE_HPP
- #include <memory>
- #include <limits>
- #include <boost/math/interpolators/detail/cardinal_quintic_b_spline_detail.hpp>
- namespace boost{ namespace math{ namespace interpolators {
- template <class Real>
- class cardinal_quintic_b_spline
- {
- public:
- // If you don't know the value of the derivative at the endpoints, leave them as nans and the routine will estimate them.
- // y[0] = y(a), y[n - 1] = y(b), step_size = (b - a)/(n -1).
- cardinal_quintic_b_spline(const Real* const y,
- size_t n,
- Real t0 /* initial time, left endpoint */,
- Real h /*spacing, stepsize*/,
- std::pair<Real, Real> left_endpoint_derivatives = {std::numeric_limits<Real>::quiet_NaN(), std::numeric_limits<Real>::quiet_NaN()},
- std::pair<Real, Real> right_endpoint_derivatives = {std::numeric_limits<Real>::quiet_NaN(), std::numeric_limits<Real>::quiet_NaN()})
- : impl_(std::make_shared<detail::cardinal_quintic_b_spline_detail<Real>>(y, n, t0, h, left_endpoint_derivatives, right_endpoint_derivatives))
- {}
- // Oh the bizarre error messages if we template this on a RandomAccessContainer:
- cardinal_quintic_b_spline(std::vector<Real> const & y,
- Real t0 /* initial time, left endpoint */,
- Real h /*spacing, stepsize*/,
- std::pair<Real, Real> left_endpoint_derivatives = {std::numeric_limits<Real>::quiet_NaN(), std::numeric_limits<Real>::quiet_NaN()},
- std::pair<Real, Real> right_endpoint_derivatives = {std::numeric_limits<Real>::quiet_NaN(), std::numeric_limits<Real>::quiet_NaN()})
- : impl_(std::make_shared<detail::cardinal_quintic_b_spline_detail<Real>>(y.data(), y.size(), t0, h, left_endpoint_derivatives, right_endpoint_derivatives))
- {}
- Real operator()(Real t) const {
- return impl_->operator()(t);
- }
- Real prime(Real t) const {
- return impl_->prime(t);
- }
- Real double_prime(Real t) const {
- return impl_->double_prime(t);
- }
- Real t_max() const {
- return impl_->t_max();
- }
- private:
- std::shared_ptr<detail::cardinal_quintic_b_spline_detail<Real>> impl_;
- };
- }}}
- #endif
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