58 lines
2.3 KiB
C++
58 lines
2.3 KiB
C++
// 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_QUADRATIC_B_SPLINE_HPP
|
|
#define BOOST_MATH_INTERPOLATORS_CARDINAL_QUADRATIC_B_SPLINE_HPP
|
|
#include <memory>
|
|
#include <boost/math/interpolators/detail/cardinal_quadratic_b_spline_detail.hpp>
|
|
|
|
|
|
namespace boost{ namespace math{ namespace interpolators {
|
|
|
|
template <class Real>
|
|
class cardinal_quadratic_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_quadratic_b_spline(const Real* const y,
|
|
size_t n,
|
|
Real t0 /* initial time, left endpoint */,
|
|
Real h /*spacing, stepsize*/,
|
|
Real left_endpoint_derivative = std::numeric_limits<Real>::quiet_NaN(),
|
|
Real right_endpoint_derivative = std::numeric_limits<Real>::quiet_NaN())
|
|
: impl_(std::make_shared<detail::cardinal_quadratic_b_spline_detail<Real>>(y, n, t0, h, left_endpoint_derivative, right_endpoint_derivative))
|
|
{}
|
|
|
|
// Oh the bizarre error messages if we template this on a RandomAccessContainer:
|
|
cardinal_quadratic_b_spline(std::vector<Real> const & y,
|
|
Real t0 /* initial time, left endpoint */,
|
|
Real h /*spacing, stepsize*/,
|
|
Real left_endpoint_derivative = std::numeric_limits<Real>::quiet_NaN(),
|
|
Real right_endpoint_derivative = std::numeric_limits<Real>::quiet_NaN())
|
|
: impl_(std::make_shared<detail::cardinal_quadratic_b_spline_detail<Real>>(y.data(), y.size(), t0, h, left_endpoint_derivative, right_endpoint_derivative))
|
|
{}
|
|
|
|
|
|
Real operator()(Real t) const {
|
|
return impl_->operator()(t);
|
|
}
|
|
|
|
Real prime(Real t) const {
|
|
return impl_->prime(t);
|
|
}
|
|
|
|
Real t_max() const {
|
|
return impl_->t_max();
|
|
}
|
|
|
|
private:
|
|
std::shared_ptr<detail::cardinal_quadratic_b_spline_detail<Real>> impl_;
|
|
};
|
|
|
|
}}}
|
|
#endif
|