mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
34 lines
1.3 KiB
C++
34 lines
1.3 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2014 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under 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 SPROUT_NUMERIC_DFT_DETAIL_TRINAGLE_HPP
|
|
#define SPROUT_NUMERIC_DFT_DETAIL_TRINAGLE_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/constants.hpp>
|
|
#include <sprout/math/sin.hpp>
|
|
#include <sprout/math/asin.hpp>
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR T
|
|
triangle_value_impl(T const& t) {
|
|
typedef double elem_type;
|
|
using sprout::sin;
|
|
using sprout::asin;
|
|
return T(sprout::math::two_div_pi<elem_type>()) * asin(sin(T(sprout::math::two_pi<elem_type>()) * t));
|
|
}
|
|
template<typename T, typename Index>
|
|
inline SPROUT_CONSTEXPR T
|
|
triangle_value(T const& frequency, T const& amplitude, T const& phase, Index i) {
|
|
return amplitude * sprout::detail::triangle_value_impl(frequency * T(i) + phase);
|
|
}
|
|
} // namespace detail
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_NUMERIC_DFT_DETAIL_TRINAGLE_HPP
|