112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
/* Copyright: (c) Kayne Ruse 2013-2015
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*/
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#pragma once
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#include <type_traits>
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#include <stdexcept>
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#include <cmath>
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class Vector2 {
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public:
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double x, y;
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Vector2() = default;
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Vector2(double i, double j): x(i), y(j) {};
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~Vector2() = default;
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Vector2& operator=(Vector2 const&) = default;
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double Length() const {
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return sqrt(x*x+y*y);
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}
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double SquaredLength() const {
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return x*x+y*y;
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}
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void Normalize() {
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double l = Length();
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if (l == 0)
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throw(std::domain_error("Divide by zero"));
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x /= l;
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y /= l;
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}
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//Arithmetic operators
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Vector2 operator+(Vector2 v) const {
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Vector2 ret;
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ret.x = x + v.x;
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ret.y = y + v.y;
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return ret;
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}
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Vector2 operator-(Vector2 v) const {
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Vector2 ret;
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ret.x = x - v.x;
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ret.y = y - v.y;
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return ret;
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}
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Vector2 operator*(Vector2 v) const {
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Vector2 ret;
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ret.x = x * v.x;
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ret.y = y * v.y;
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return ret;
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}
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Vector2 operator*(double d) const {
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Vector2 ret;
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ret.x = x * d;
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ret.y = y * d;
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return ret;
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}
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Vector2 operator/(Vector2 v) {
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if (!v.x || !v.y)
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throw(std::domain_error("Divide by zero"));
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Vector2 ret;
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ret.x = x / v.x;
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ret.y = y / v.y;
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return ret;
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}
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Vector2 operator/(double d) {
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if (!d)
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throw(std::domain_error("Divide by zero"));
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Vector2 ret;
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ret.x = x / d;
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ret.y = y / d;
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return ret;
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}
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//unary operators
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Vector2 operator-() { return {-x, -y}; }
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//comparison operators
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bool operator==(Vector2 v) { return (x == v.x && y == v.y); }
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bool operator!=(Vector2 v) { return (x != v.x || y != v.y); }
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//member templates (curry the above operators)
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template<typename T> Vector2 operator+=(T t) { return *this = *this + t; }
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template<typename T> Vector2 operator-=(T t) { return *this = *this - t; }
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template<typename T> Vector2 operator*=(T t) { return *this = *this * t; }
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template<typename T> Vector2 operator/=(T t) { return *this = *this / t; }
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template<typename T> bool operator==(T t) { return (x == t && y == t); }
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template<typename T> bool operator!=(T t) { return (x != t || y != t); }
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};
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//This is explicitly a POD
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static_assert(std::is_pod<Vector2>::value, "Vector2 is not a POD");
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