82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_GEOM_RAY_HPP
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#define __UTIL_GEOM_RAY_HPP
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#include "aabb.hpp"
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#include "plane.hpp"
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#include "sphere.hpp"
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#include "../vector.hpp"
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#include "../point.hpp"
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///////////////////////////////////////////////////////////////////////////////
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namespace util::geom {
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template <size_t S, typename T>
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struct ray {
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constexpr ray () = default;
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constexpr ray (point<S,T> _origin, vector<S,T> _direction) noexcept:
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origin (_origin),
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direction (_direction)
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{
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CHECK (is_normalised (direction));
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}
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constexpr ray (point<S,T> _origin, point <S,T> _distant) noexcept:
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ray (_origin, _origin.to (_distant ))
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{
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CHECK (is_normalised (direction));
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}
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//---------------------------------------------------------------------
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// intersection tests
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T intersect (plane<S,T>) const;
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T intersect (aabb<S,T>) const;
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T intersect (sphere<S,T>) const;
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// queries
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T closest (point<S,T>) const;
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util::point<S,T> at (T) const;
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// data members
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point<S,T> origin;
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vector<S,T> direction;
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};
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template <std::size_t S, typename T>
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constexpr auto
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make_ray (point<S,T> p, vector<S,T> d) noexcept
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{
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return ray<S,T> { p, d };
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}
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template <std::size_t S, typename T>
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constexpr auto
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make_ray (point<S,T> p, point<S,T> q)
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{
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return ray<S,T> { p, q };
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};
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typedef ray<2,float> ray2f;
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typedef ray<3,float> ray3f;
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}
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#endif
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