libcruft-util/point.hpp

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/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
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* Copyright 2011-2015 Danny Robson <danny@nerdcruft.net>
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*/
#ifndef __UTIL_POINT_HPP
#define __UTIL_POINT_HPP
#include "extent.hpp"
#include "vector.hpp"
#include "coord.hpp"
#include <array>
#include <initializer_list>
#include <iostream>
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#include <type_traits>
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namespace util {
/// An n-dimensional position in space.
template <size_t S, typename T>
struct point : public coord::base<S,T,point,coord::xyzw>
{
using coord::base<S,T,util::point,coord::xyzw>::base;
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// point operators
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template <typename U> typename std::common_type<T,U>::type distance (const point<S,U> &) const;
template <typename U> typename std::common_type<T,U>::type distance2 (const point<S,U> &) const;
template <typename U> typename std::common_type<T,U>::type manhattan (const point<S,U> &) const;
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vector<S,T> to (const point&) const;
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vector<S,T> from (const point&) const;
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template <size_t D> point<D,T> homog (void) const;
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static const point<S,T> ORIGIN;
void sanity (void) const;
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};
// iostream operators
template <size_t S, typename T>
std::ostream& operator<< (std::ostream&, const point<S,T>&);
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// Convenience typedefs
typedef point<2,float> point2f;
typedef point<3,float> point3f;
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typedef point<4,float> point4f;
typedef point<2,double> point2d;
typedef point<3,double> point3d;
typedef point<2,size_t> point2u;
typedef point<2,intmax_t> point2i;
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}
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#include <functional>
namespace std {
template <size_t S, typename T>
struct hash<util::point<S,T>> {
size_t operator() (const util::point<S,T> &p) const {
std::hash<T> h;
size_t k = 0;
for (size_t i = 0; i < S; ++i)
k = h (p.data[i] ^ k);
return k;
}
};
}
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#include "point.ipp"
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#endif // __UTIL_POINT_HPP