mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
63 lines
2 KiB
C++
63 lines
2 KiB
C++
#ifndef SPROUT_DARKROOM_RAYS_RAY_HPP
|
|
#define SPROUT_DARKROOM_RAYS_RAY_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/tuple/tuple.hpp>
|
|
#include <sprout/utility/forward.hpp>
|
|
#include <sprout/darkroom/access/access.hpp>
|
|
#include <sprout/darkroom/coords/vector.hpp>
|
|
|
|
namespace sprout {
|
|
namespace darkroom {
|
|
namespace rays {
|
|
//
|
|
// position
|
|
// direction
|
|
//
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR auto position(
|
|
T&& t
|
|
) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::darkroom::access::get<0>(sprout::forward<T>(t))))
|
|
-> decltype(sprout::darkroom::access::get<0>(sprout::forward<T>(t)))
|
|
{
|
|
return sprout::darkroom::access::get<0>(sprout::forward<T>(t));
|
|
}
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR auto direction(
|
|
T&& t
|
|
) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::darkroom::access::get<1>(sprout::forward<T>(t))))
|
|
-> decltype(sprout::darkroom::access::get<1>(sprout::forward<T>(t)))
|
|
{
|
|
return sprout::darkroom::access::get<1>(sprout::forward<T>(t));
|
|
}
|
|
|
|
//
|
|
// make_ray
|
|
//
|
|
template<typename Position, typename Direction>
|
|
SPROUT_CONSTEXPR sprout::tuples::tuple<Position, Direction>
|
|
make_ray(Position const& pos, Direction const& dir) {
|
|
return sprout::tuples::make_tuple(pos, dir);
|
|
}
|
|
|
|
//
|
|
// ray
|
|
//
|
|
typedef sprout::tuples::tuple<sprout::darkroom::coords::vector3d, sprout::darkroom::coords::vector3d> ray;
|
|
|
|
//
|
|
// point_of_intersection
|
|
//
|
|
template<typename Ray, typename Distance>
|
|
SPROUT_CONSTEXPR inline typename sprout::darkroom::access::unit<Ray>::type
|
|
point_of_intersection(Ray const& ray, Distance const& dist) {
|
|
return sprout::darkroom::coords::add(
|
|
sprout::darkroom::rays::position(ray),
|
|
sprout::darkroom::coords::scale(sprout::darkroom::rays::direction(ray), dist)
|
|
);
|
|
}
|
|
} // namespace rays
|
|
} // namespace darkroom
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_DARKROOM_RAYS_RAY_HPP
|