85 lines
2.1 KiB
C++
85 lines
2.1 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 2011-2018 Danny Robson <danny@nerdcruft.net>
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*/
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#include "point.hpp"
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#include "debug.hpp"
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#include <cstdlib>
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using util::point;
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///////////////////////////////////////////////////////////////////////////////
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namespace util::debug {
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template <size_t S, typename T>
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struct validator<point<S,T>> {
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static bool is_valid (const point<S,T> &p)
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{
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// ensure we don't have a nan anywhere
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return std::all_of (p.cbegin (), p.cend (), [] (auto i) {
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return !(std::is_floating_point<T>::value && std::isnan (i));
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});
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}
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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std::pair<
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util::point<S,T>,
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util::point<S,T>
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>
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util::furthest (util::view<const util::point<S,T>*> src)
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{
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CHECK_GE (src.size (), 2u);
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size_t a = 0;
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size_t b = 1;
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auto d = distance2 (src[a],src[b]);
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for (size_t i = 0; i < src.size (); ++i) {
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for (size_t j = i + 1; j < src.size (); ++j) {
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if (auto d2 = distance2 (src[i], src[j]); d2 > d) {
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a = i;
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b = j;
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d = d2;
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}
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}
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}
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return { src[a], src[b] };
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}
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//-----------------------------------------------------------------------------
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#define INSTANTIATE_S_T(S,T) \
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template struct util::point<S,T>; \
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template bool util::debug::is_valid (const point<S,T>&); \
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template std::pair<util::point<S,T>,util::point<S,T>> util::furthest (util::view<const util::point<S,T>*>); \
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template struct util::debug::validator<point<S,T>>;
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#define INSTANTIATE(T) \
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INSTANTIATE_S_T(1,T) \
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INSTANTIATE_S_T(2,T) \
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INSTANTIATE_S_T(3,T) \
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INSTANTIATE_S_T(4,T)
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INSTANTIATE(int16_t)
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INSTANTIATE(int32_t)
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INSTANTIATE(int64_t)
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INSTANTIATE(uint16_t)
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INSTANTIATE(uint32_t)
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INSTANTIATE(uint64_t)
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INSTANTIATE(float)
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INSTANTIATE(double)
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