84 lines
2.5 KiB
C++
84 lines
2.5 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 2011 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_VECTOR_HPP
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#define __UTIL_VECTOR_HPP
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#include "json/tree.hpp"
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#include "coord.hpp"
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#include <array>
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#include <iostream>
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#include <initializer_list>
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namespace util {
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template <size_t S, typename T>
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struct vector : public coord::base<S,T,vector,coord::xyzw,coord::stpq>
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{
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using coord::base<S,T,util::vector,coord::xyzw,coord::stpq>::base;
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// vector size
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bool is_zero (void) const;
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T magnitude (void) const;
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T magnitude2 (void) const;
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T difference (vector<S,T>) const;
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T difference2 (vector<S,T>) const;
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// normalisation
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bool is_normalised (void) const;
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vector<S,T>& normalise (void);
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vector<S,T> normalised [[gnu::warn_unused_result]] (void) const;
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// constants
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static const vector<S,T> UNIT;
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static const vector<S,T> ZERO;
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void sanity (void) const;
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};
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// polar/cartesian conversions; assumes (mag, angle) form.
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template <typename T> vector<2,T> polar_to_cartesian (vector<2,T>);
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template <typename T> vector<2,T> cartesian_to_polar (vector<2,T>);
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template <typename T> vector<3,T> cross (vector<3,T>, vector<3,T>);
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template <typename T> vector<3,T> spherical_to_cartesian (vector<3,T>);
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template <typename T> vector<3,T> cartesian_to_spherical (vector<3,T>);
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// output and serialisation operators
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template <size_t S, typename T> std::ostream& operator<< (std::ostream&, vector<S,T>);
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template <size_t S, typename T>
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const json::tree::node& operator>> (const json::tree::node&, vector<S,T>&);
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// convenience typedefs
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typedef vector<2,size_t> vector2u;
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typedef vector<2,intmax_t> vector2i;
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typedef vector<2,float> vector2f;
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typedef vector<3,float> vector3f;
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typedef vector<4,float> vector4f;
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typedef vector<2,double> vector2d;
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typedef vector<3,double> vector3d;
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typedef vector<3,double> vector4d;
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}
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#endif
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