mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2016 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_MATH_QUATERNION_POW_HPP
|
|
#define SPROUT_MATH_QUATERNION_POW_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/quaternion/quaternion.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
//
|
|
// pow
|
|
//
|
|
namespace detail {
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR sprout::math::quaternion<T>
|
|
pow_q_impl(sprout::math::quaternion<T> const& q, int n, int m, sprout::math::quaternion<T> const& result) {
|
|
return n != m << 1 ? result * result * q
|
|
: result * result
|
|
;
|
|
}
|
|
} // namespace detail
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR sprout::math::quaternion<T>
|
|
pow(sprout::math::quaternion<T> const& q, int n) {
|
|
return n > 1 ? sprout::math::detail::pow_q_impl(
|
|
q, n, n >> 1, sprout::math::pow(q, n >> 1)
|
|
)
|
|
: n == 1 ? q
|
|
: n == 0 ? sprout::math::quaternion<T>(static_cast<T>(1))
|
|
: sprout::math::pow(sprout::math::quaternion<T>(static_cast<T>(1)) / q, -n)
|
|
;
|
|
}
|
|
} // namespace math
|
|
|
|
using sprout::math::pow;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_QUATERNION_POW_HPP
|