69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2015-2018 Danny Robson <danny@nerdcruft.net>
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*/
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#include "ray.hpp"
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#include "iostream.hpp"
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#include "ops.hpp"
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#include "../coord/iostream.hpp"
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using cruft::geom::ray;
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///////////////////////////////////////////////////////////////////////////////
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/// returns the closest parameter along the ray to a given point
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template <size_t S, typename T>
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T
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ray<S,T>::closest (point<S,T> q) const
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{
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// project the origin-point difference onto the direction
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return dot (origin - q, direction);
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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cruft::point<S,T>
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ray<S,T>::at (T t) const
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{
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return origin + direction * t;
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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std::ostream&
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cruft::geom::operator<< (std::ostream &os, ray<S,T> r)
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{
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return os << "ray(" << r.origin << ',' << r.direction << ')';
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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struct cruft::debug::validator<ray<S,T>> {
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static bool
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is_valid (ray<S,T> const& val)
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{
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return cruft::debug::is_valid (val.origin) &&
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cruft::debug::is_valid (val.direction) &&
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is_normalised (val.direction);
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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#define INSTANTIATE_S_T(S,T) \
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template std::ostream& cruft::geom::operator<< (std::ostream&, ray<(S),T>); \
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template struct cruft::debug::validator<ray<(S),T>>; \
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template struct cruft::geom::ray<(S),T>;
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INSTANTIATE_S_T(2,float)
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INSTANTIATE_S_T(3,float)
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