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