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#include "src/geometry/Z2/operation/square-norm.hpp"
Z square_norm(Vector<Z> v)
v の長さ(norm)の2乗を返す。
v
オーバーフローに注意。
#pragma once #include "src/geometry/Z2/class/vector.hpp" #include "src/geometry/Z2/operation/square.hpp" namespace luz::Z2 { template < typename Z > Z square_norm(Vector< Z > v) { return square(v.x()) + square(v.y()); } } // namespace luz::Z2
#line 2 "src/geometry/Z2/operation/square-norm.hpp" #line 2 "src/geometry/Z2/class/vector.hpp" #include <vector> namespace luz::Z2 { template < typename Z > class Vector { Z x_, y_; public: Vector(): x_(0), y_(0) {} Vector(Z x, Z y): x_(x), y_(y) {} Z x() const { return x_; } Z y() const { return y_; } bool operator==(const Vector &v) const { return x_ == v.x_ and y_ == v.y_; } bool operator!=(const Vector &v) const { return x_ != v.x_ or y_ != v.y_; } Vector &operator+=(const Vector &v) { x_ += v.x_; y_ += v.y_; return *this; } Vector &operator-=(const Vector &v) { x_ -= v.x_; y_ -= v.y_; return *this; } Vector operator+(const Vector &v) const { return Vector(*this) += v; } Vector operator-(const Vector &v) const { return Vector(*this) -= v; } Vector operator+() const { return *this; } Vector operator-() const { return Vector() - *this; } }; template < typename Z > using Vectors = std::vector< Vector< Z > >; } // namespace luz::Z2 #line 2 "src/geometry/Z2/operation/square.hpp" namespace luz::Z2 { template < typename Z > Z square(const Z x) { return x * x; } } // namespace luz::Z2 #line 5 "src/geometry/Z2/operation/square-norm.hpp" namespace luz::Z2 { template < typename Z > Z square_norm(Vector< Z > v) { return square(v.x()) + square(v.y()); } } // namespace luz::Z2