#pragma once #include <cstdlib> #include <cmath> namespace msdfgen { /** * A 2-dimensional euclidean vector with double precision. * Implementation based on the Vector2 template from Artery Engine. * @author Viktor Chlumsky */ struct Vector2 { double x, y; Vector2(double val = 0); Vector2(double x, double y); /// Sets the vector to zero. void reset(); /// Sets individual elements of the vector. void set(double x, double y); /// Returns the vector's length. double length() const; /// Returns the angle of the vector in radians (atan2). double direction() const; /// Returns the normalized vector - one that has the same direction but unit length. Vector2 normalize(bool allowZero = false) const; /// Returns a vector with the same length that is orthogonal to this one. Vector2 getOrthogonal(bool polarity = true) const; /// Returns a vector with unit length that is orthogonal to this one. Vector2 getOrthonormal(bool polarity = true, bool allowZero = false) const; /// Returns a vector projected along this one. Vector2 project(const Vector2 &vector, bool positive = false) const; operator const void *() const; bool operator!() const; bool operator==(const Vector2 &other) const; bool operator!=(const Vector2 &other) const; Vector2 operator+() const; Vector2 operator-() const; Vector2 operator+(const Vector2 &other) const; Vector2 operator-(const Vector2 &other) const; Vector2 operator*(const Vector2 &other) const; Vector2 operator/(const Vector2 &other) const; Vector2 operator*(double value) const; Vector2 operator/(double value) const; Vector2 & operator+=(const Vector2 &other); Vector2 & operator-=(const Vector2 &other); Vector2 & operator*=(const Vector2 &other); Vector2 & operator/=(const Vector2 &other); Vector2 & operator*=(double value); Vector2 & operator/=(double value); /// Dot product of two vectors. friend double dotProduct(const Vector2 &a, const Vector2 &b); /// A special version of the cross product for 2D vectors (returns scalar value). friend double crossProduct(const Vector2 &a, const Vector2 &b); friend Vector2 operator*(double value, const Vector2 &vector); friend Vector2 operator/(double value, const Vector2 &vector); }; /// A vector may also represent a point, which shall be differentiated semantically using the alias Point2. typedef Vector2 Point2; }