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#ifndef VECTOR2_HPP_
#define VECTOR2_HPP_
#include <string>
#include <type_traits>
#include <sstream>
#include <iomanip>
template<typename T>
struct vector2 {
static_assert(std::is_arithmetic<T>::value, "vector2 members must be an arithmetic type (i.e. numbers)");
T x, y;
vector2(T _x = 0, T _y = 0)
: x(_x), y(_y) {}
// format: "3, 5"
vector2(const std::string& s) {
*this = s;
}
vector2<T>& operator=(const T& value) {
x = y = value;
return *this;
}
vector2<T>& operator=(const std::string& s) {
if (s.empty()) {
x = y = 0;
} else {
auto comma = s.find(',');
x = std::stoi(s.substr(0, comma));
y = std::stoi(s.substr(comma + 1));
}
return *this;
}
// addition
vector2<T> operator+(const vector2<T>& v) const {
return vector2<T>(x + v.x, y + v.y);
}
template<typename T2>
vector2<T> operator+(const vector2<T2>& v) const {
return vector2<T>(x + v.x, y + v.y);
}
vector2<T> operator+(const T& n) const {
return vector2<T>(x + n, y + n);
}
vector2<T> operator+=(const vector2<T>& v) {
x += v.x, y += v.y;
return *this;
}
// subtraction
vector2<T> operator-(const vector2<T>& v) const {
return vector2<T>(x - v.x, y - v.y);
}
vector2<T> operator-(const T& n) const {
return vector2<T>(x - n, y - n);
}
vector2<T> operator-=(const vector2<T>& v) {
x -= v.x, y -= v.y;
return *this;
}
// multiplication
vector2<T> operator*(const vector2<T>& v) const {
return vector2<T>(x * v.x, y * v.y);
}
vector2<T> operator*(const T& n) const {
return vector2<T>(x * n, y * n);
}
vector2<T> operator*=(const vector2<T>& v) {
x *= v.x, y *= v.y;
return *this;
}
vector2<T> operator*=(const T& n) {
x *= n, y *= n;
return *this;
}
// division
vector2<T> operator/(const vector2<T>& v) const {
return vector2<T>(x / v.x, y / v.y);
}
vector2<T> operator/(const T& n) const {
return vector2<T>(x / n, y / n);
}
vector2<T> operator/=(const vector2<T>& v) {
x /= v.x, y /= v.y;
return *this;
}
vector2<T> operator/=(const T& n) {
x /= n, y /= n;
return *this;
}
// compare
bool operator==(const vector2<T>& v) const {
return (x == v.x) && (y == v.y);
}
bool operator>(const vector2<T>& v) const {
return (x > v.x) && (y > v.y);
}
bool operator<(const vector2<T>& v) const {
return (x < v.x) && (y < v.y);
}
bool operator<=(const T& n) const {
return (x <= n) && (y <= n);
}
// other functions
std::string toString(int precision = -1) const {
std::stringstream ss;
std::string sx, sy;
ss << std::fixed;
if (precision > -1)
ss << std::setprecision(precision);
ss << x;
sx = ss.str();
ss.str(std::string());
ss << y;
sy = ss.str();
return "(" + sx + ", " + sy + ")";
}
};
using vec2 = vector2<float>;
using dim2 = vector2<int>;
#endif // VECTOR2_HPP_
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