111 lines
2.3 KiB
C++
111 lines
2.3 KiB
C++
#pragma once
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#include <vector>
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typedef long long ll;
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typedef unsigned long long ull;
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template <typename T> struct Coord {
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T x, y;
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Coord() : Coord(0, 0) {}
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Coord(const T x, const T y) {
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this->x = x;
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this->y = y;
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}
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Coord<T> operator-() { return {-this->x, -this->y}; }
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Coord<T> &operator+=(const Coord<T> &other) {
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x += other.x;
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y += other.y;
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return *this;
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}
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Coord<T> &operator-=(const Coord<T> &other) {
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x -= other.x;
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y -= other.y;
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return *this;
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}
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Coord<T> &operator*=(const T other) {
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x *= other;
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y *= other;
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return *this;
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}
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Coord<T> &operator/=(const T other) {
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x /= other;
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y /= other;
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return *this;
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}
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std::vector<Coord<T>> nearby(const Coord<T> &cMin, const Coord<T> &cMax) {
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std::vector<Coord<T>> ret;
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const T xMin = std::max(this->x - 1, cMin.x);
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const T xMax = std::min(this->x + 1, cMax.x);
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const T yMin = std::max(this->y - 1, cMin.y);
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const T yMax = std::min(this->y + 1, cMax.y);
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for (T x = xMin; x <= xMax; x++) {
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for (T y = yMin; y <= yMax; y++) {
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Coord<T> xy(x, y);
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if (*this != xy) {
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ret.push_back(xy);
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}
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}
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}
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return ret;
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}
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std::vector<Coord<T>> nearby(const Coord<T> &cMax) {
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return this->nearby(Coord<T>(), cMax);
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}
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};
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template <typename T>
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Coord<T> operator+(const Coord<T> &lhs, const Coord<T> &rhs) {
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Coord<T> result = lhs;
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result += rhs;
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return result;
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}
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template <typename T>
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Coord<T> operator-(const Coord<T> &lhs, const Coord<T> &rhs) {
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Coord<T> result = lhs;
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result -= rhs;
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return result;
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}
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template <typename T> Coord<T> operator*(const Coord<T> &lhs, const T rhs) {
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Coord<T> result = lhs;
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result *= rhs;
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return result;
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}
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template <typename T> Coord<T> operator/(const Coord<T> &lhs, const T rhs) {
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Coord<T> result = lhs;
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result /= rhs;
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return result;
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}
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template <typename T>
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inline bool operator==(const Coord<T> &lhs, const Coord<T> &rhs) {
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return lhs.x == rhs.x && lhs.y == rhs.y;
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}
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template <> struct std::hash<Coord<int>> {
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std::size_t operator()(const Coord<int> &c) const noexcept {
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return (c.x << (sizeof(std::size_t) / 2)) - c.x + c.y;
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}
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};
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template <> struct std::hash<Coord<ull>> {
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std::size_t operator()(const Coord<ull> &c) const noexcept {
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return (c.x << (sizeof(std::size_t) / 2)) - c.x + c.y;
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}
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};
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typedef Coord<int> icoord;
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typedef Coord<ull> ullcoord;
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