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https://github.com/bolero-MURAKAMI/Sprout.git
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72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
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/*=============================================================================
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Copyright (c) 2011-2016 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_MATH_QUATERNION_ABS_HPP
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#define SPROUT_MATH_QUATERNION_ABS_HPP
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#include <sprout/config.hpp>
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#include <sprout/array/array.hpp>
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#include <sprout/math/sqrt.hpp>
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#include <sprout/math/quaternion/quaternion.hpp>
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#include <sprout/math/quaternion/detail/abs_max.hpp>
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#include <sprout/math/quaternion/detail/sum.hpp>
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#include <sprout/math/quaternion/detail/mul.hpp>
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namespace sprout {
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namespace math {
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//
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// abs
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//
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namespace detail {
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template<typename T>
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inline SPROUT_CONSTEXPR T
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abs_q_impl_3(sprout::array<T, 4> const& temp, T const& maxim) {
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return maxim * sprout::math::sqrt(sprout::math::detail::sum(sprout::math::detail::mul(temp, temp)));
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}
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template<typename T>
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inline SPROUT_CONSTEXPR T
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abs_q_impl_2(sprout::array<T, 4> const& temp, T const& maxim) {
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return sprout::math::detail::abs_q_impl_3(
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sprout::math::detail::mul(temp, maxim), maxim
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);
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}
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template<typename T>
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inline SPROUT_CONSTEXPR T
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abs_q_impl_1(sprout::array<T, 4> const& temp, T const& maxim) {
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return maxim == static_cast<T>(0) ? sprout::math::quaternion<T>(maxim)
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: sprout::math::detail::abs_q_impl_2(
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temp, static_cast<T>(1) / maxim
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)
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;
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}
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template<typename T>
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inline SPROUT_CONSTEXPR T
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abs_q_impl(sprout::array<T, 4> const& temp) {
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return sprout::math::detail::abs_q_impl_1(
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temp, sprout::math::detail::abs_max(temp)
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);
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}
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} // namespace detail
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template<typename T>
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inline SPROUT_CONSTEXPR T
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abs(sprout::math::quaternion<T> const& q) {
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return sprout::math::detail::abs_q_impl(
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sprout::array<T, 4>{{
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q.R_component_1(),
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q.R_component_2(),
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q.R_component_3(),
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q.R_component_4()
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}}
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);
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}
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} // namespace math
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using sprout::math::abs;
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} // namespace sprout
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#endif // #ifndef SPROUT_MATH_QUATERNION_ABS_HPP
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