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sprout/darkroom/* 追加

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bolero-MURAKAMI 2011-11-26 15:20:35 +09:00
parent 1c898f8b93
commit 212e9ea652
27 changed files with 1692 additions and 4 deletions
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sprout/darkroom/objects/intersect.hpp Normal file
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#ifndef SPROUT_DARKROOM_OBJECTS_INTERSECT_HPP
#define SPROUT_DARKROOM_OBJECTS_INTERSECT_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/darkroom/access/access.hpp>
#include <sprout/darkroom/intersects/intersection.hpp>
namespace sprout {
namespace darkroom {
namespace objects {
//
// intersect
//
template<typename Object, typename Ray>
SPROUT_CONSTEXPR inline typename Object::template intersection<Ray>::type
intersect(Object const& obj, Ray const& ray) {
return obj.intersect(ray);
}
//
// intersect_list
//
namespace detail {
template<std::size_t N>
struct intersect_list_impl {
private:
template<typename Objects, typename Ray, typename A, typename B>
SPROUT_CONSTEXPR typename sprout::darkroom::access::unit<Objects>::type
::template intersection<Ray>::type
comp(A const& a, B const& b) const {
return sprout::darkroom::intersects::does_intersect(a)
&& sprout::darkroom::intersects::does_intersect(b)
? sprout::darkroom::intersects::distance(a) < sprout::darkroom::intersects::distance(b)
? a
: b
: sprout::darkroom::intersects::does_intersect(a)
? a
: b
;
}
public:
template<typename Objects, typename Ray>
SPROUT_CONSTEXPR typename sprout::darkroom::access::unit<Objects>::type
::template intersection<Ray>::type
operator()(Objects const& objs, Ray const& ray) const {
return comp<Objects, Ray>(
sprout::darkroom::objects::intersect(sprout::darkroom::access::get<N>(objs), ray),
intersect_list_impl<N - 1>()(objs, ray)
);
}
};
template<>
struct intersect_list_impl<0> {
public:
template<typename Objects, typename Ray>
SPROUT_CONSTEXPR typename sprout::darkroom::access::unit<Objects>::type
::template intersection<Ray>::type
operator()(Objects const& objs, Ray const& ray) const {
return sprout::darkroom::objects::intersect(sprout::darkroom::access::get<0>(objs), ray);
}
};
} // namespace detail
template<typename Objects, typename Ray>
SPROUT_CONSTEXPR inline typename sprout::darkroom::access::unit<Objects>::type
::template intersection<Ray>::type
intersect_list(Objects const& objs, Ray const& ray) {
return sprout::darkroom::objects::detail::intersect_list_impl<
sprout::darkroom::access::size<Objects>::value - 1
>()(objs, ray);
}
} // namespace objects
} // namespace darkroom
} // namespace sprout
#endif // #ifndef SPROUT_DARKROOM_OBJECTS_INTERSECT_HPP