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https://github.com/bolero-MURAKAMI/Sprout
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sprout/darkroom/* 追加
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bolero-MURAKAMI
parent
1c898f8b93
commit
212e9ea652
27 changed files with 1692 additions and 4 deletions
167
sprout/darkroom/coords/vector.hpp
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167
sprout/darkroom/coords/vector.hpp
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#ifndef SPROUT_DARKROOM_COORDS_VECTOR_HPP
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#define SPROUT_DARKROOM_COORDS_VECTOR_HPP
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#include <cmath>
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#include <sprout/config.hpp>
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#include <sprout/tuple/tuple.hpp>
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#include <sprout/tuple/functions.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/darkroom/access/access.hpp>
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namespace sprout {
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namespace darkroom {
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namespace coords {
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//
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// x
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// y
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// z
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//
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template<typename T>
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SPROUT_CONSTEXPR auto x(
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T&& t
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) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::darkroom::access::get<0>(sprout::forward<T>(t))))
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-> decltype(sprout::darkroom::access::get<0>(sprout::forward<T>(t)))
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{
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return sprout::darkroom::access::get<0>(sprout::forward<T>(t));
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}
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template<typename T>
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SPROUT_CONSTEXPR auto y(
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T&& t
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) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::darkroom::access::get<1>(sprout::forward<T>(t))))
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-> decltype(sprout::darkroom::access::get<1>(sprout::forward<T>(t)))
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{
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return sprout::darkroom::access::get<1>(sprout::forward<T>(t));
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}
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template<typename T>
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SPROUT_CONSTEXPR auto z(
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T&& t
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) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::darkroom::access::get<2>(sprout::forward<T>(t))))
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-> decltype(sprout::darkroom::access::get<2>(sprout::forward<T>(t)))
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{
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return sprout::darkroom::access::get<2>(sprout::forward<T>(t));
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}
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//
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// vector3d
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//
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typedef sprout::tuples::tuple<double, double, double> vector3d;
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//
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// length_sq
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//
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template<typename Vector>
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SPROUT_CONSTEXPR inline typename sprout::darkroom::access::unit<Vector>::type
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length_sq(Vector const& vec) {
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return sprout::darkroom::coords::x(vec) * sprout::darkroom::coords::x(vec)
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+ sprout::darkroom::coords::y(vec) * sprout::darkroom::coords::y(vec)
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+ sprout::darkroom::coords::z(vec) * sprout::darkroom::coords::z(vec)
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;
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}
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//
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// length
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//
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template<typename Vector>
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SPROUT_CONSTEXPR inline typename sprout::darkroom::access::unit<Vector>::type
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length(Vector const& vec) {
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using std::sqrt;
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return sqrt(sprout::darkroom::coords::length_sq(vec));
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}
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//
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// add
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//
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template<typename Vector1, typename Vector2>
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SPROUT_CONSTEXPR inline Vector1 add(Vector1 const& lhs, Vector2 const& rhs) {
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return sprout::tuples::remake_clone<Vector1>(
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lhs,
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sprout::darkroom::coords::x(lhs) + sprout::darkroom::coords::x(rhs),
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sprout::darkroom::coords::y(lhs) + sprout::darkroom::coords::y(rhs),
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sprout::darkroom::coords::z(lhs) + sprout::darkroom::coords::z(rhs)
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);
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}
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//
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// sub
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//
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template<typename Vector1, typename Vector2>
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SPROUT_CONSTEXPR inline Vector1 sub(Vector1 const& lhs, Vector2 const& rhs) {
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return sprout::tuples::remake_clone<Vector1>(
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lhs,
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sprout::darkroom::coords::x(lhs) - sprout::darkroom::coords::x(rhs),
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sprout::darkroom::coords::y(lhs) - sprout::darkroom::coords::y(rhs),
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sprout::darkroom::coords::z(lhs) - sprout::darkroom::coords::z(rhs)
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);
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}
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//
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// scale
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//
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template<typename Vector, typename Fac>
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SPROUT_CONSTEXPR inline Vector scale(Vector const& lhs, Fac const& rhs) {
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return sprout::tuples::remake_clone<Vector>(
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lhs,
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sprout::darkroom::coords::x(lhs) * rhs,
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sprout::darkroom::coords::y(lhs) * rhs,
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sprout::darkroom::coords::z(lhs) * rhs
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);
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}
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//
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// dot
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//
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template<typename Vector>
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SPROUT_CONSTEXPR inline typename sprout::darkroom::access::unit<Vector>::type
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dot(Vector const& lhs, Vector const& rhs) {
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return sprout::darkroom::coords::x(lhs) * sprout::darkroom::coords::x(rhs)
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+ sprout::darkroom::coords::y(lhs) * sprout::darkroom::coords::y(rhs)
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+ sprout::darkroom::coords::z(lhs) * sprout::darkroom::coords::z(rhs)
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;
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}
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//
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// normalize
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//
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namespace detail {
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template<typename Vector>
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SPROUT_CONSTEXPR inline Vector normalize_impl(
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Vector const& vec,
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typename sprout::darkroom::access::unit<Vector>::type const& len
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)
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{
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return sprout::tuples::remake_clone<Vector>(
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vec,
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sprout::darkroom::coords::x(vec) / len,
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sprout::darkroom::coords::y(vec) / len,
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sprout::darkroom::coords::z(vec) / len
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);
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}
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} // namespace detail
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template<typename Vector>
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SPROUT_CONSTEXPR inline Vector normalize(Vector const& vec) {
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return sprout::darkroom::coords::detail::normalize_impl(
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vec,
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sprout::darkroom::coords::length(vec)
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);
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}
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//
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// reflect
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//
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template<typename Incident, typename Normal>
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SPROUT_CONSTEXPR inline Incident reflect(Incident const& incid, Normal const& nor) {
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return sprout::darkroom::coords::sub(
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incid,
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sprout::darkroom::coords::scale(nor, sprout::darkroom::coords::dot(incid, nor) * 2)
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);
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}
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//
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// normal_to_color
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//
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template<typename Color, typename Normal>
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SPROUT_CONSTEXPR Color normal_to_color(Normal const& nor) {
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return sprout::tuples::make_clone<Color>(
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0.5 + sprout::darkroom::coords::x(nor) * 0.5,
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0.5 + sprout::darkroom::coords::y(nor) * 0.5,
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0.5 + sprout::darkroom::coords::z(nor) * 0.5
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);
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}
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} // namespace coords
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} // namespace darkroom
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} // namespace sprout
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#endif // #ifndef SPROUT_DARKROOM_COORDS_VECTOR_HPP
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