Lightweight C++ library providing vector mathematics functionality and other basic geometry & arithmetic utilities. I created this for reuse in my graphics and game development projects.

• Vec2 and Vec3 classes
• Geometric utilities
• Arithmetic utilities
• Basic random number generation

#include <iostream>
#include "vecpp.h"

int main() {
    vecpp::Vec3 v1(1.0, 2.0, 3.0);
    vecpp::Vec3 v2 = vecpp::Vec3::random();

    std::cout << "Vector 1: " << v1 << std::endl;
    std::cout << "Vector 2 (random): " << v2 << std::endl;

    vecpp::Vec3 v3 = v1 + v2;
    std::cout << "Vector 3 (v1 + v2): " << v3 << std::endl;

    double dotProduct = v1.dot(v2);
    std::cout << "Dot product of v1 and v2: " << dotProduct << std::endl;

    vecpp::Vec3 crossProduct = v1.cross(v2);
    std::cout << "Cross product of v1 and v2: " << crossProduct << std::endl;

    vecpp::Vec2 v4(1.0, 2.0);
    vecpp::Vec2 v5 = vecpp::Vec2::random();

    std::cout << "Vector 4: " << v4 << std::endl;
    std::cout << "Vector 5 (random): " << v5 << std::endl;

    vecpp::Vec2 v6 = v4 + v5;
    std::cout << "Vector 6 (v4 + v5): " << v6 << std::endl;

    double dotProduct2 = v4.dot(v5);
    std::cout << "Dot product of v4 and v5: " << dotProduct2 << std::endl;

    return 0;
}

The Vec2 class provides various methods for vector operations:

• Constructors:

  • Vec2()
  • Vec2(double x, double y)

• Accessors:

  • double x() const
  • double y() const

• Static Methods:

  • static Vec2 random()
  • static Vec2 random(double min, double max)

• Operators:

  • Vec2 operator-() const
  • double operator[](int i) const
  • double& operator[](int i)
  • Vec2& operator+=(const Vec2 &v)
  • Vec2& operator+=(const double t)
  • Vec2& operator*=(const double t)
  • Vec2& operator/=(const double t)

• Methods:

  • double length() const
  • double lengthSquared() const
  • double dot(const Vec2 &v) const
  • Vec2 unitVector() const
  • bool isNearZero() const

The Vec3 class provides various methods for vector operations:

• Constructors:

  • Vec3()
  • Vec3(double x, double y, double z)

• Accessors:

  • double x() const
  • double y() const
  • double z() const

• Static Methods:

  • static Vec3 random()
  • static Vec3 random(double min, double max)
  • static Vec3 randomUnitVector()

• Operators:

  • Vec3 operator-() const
  • double operator[](int i) const
  • double& operator[](int i)
  • Vec3& operator+=(const Vec3 &v)
  • Vec3& operator+=(const double t)
  • Vec3& operator*=(const double t)
  • Vec3& operator/=(const double t)

• Methods:

  • double length() const
  • double lengthSquared() const
  • double dot(const Vec3 &v) const
  • Vec3 cross(const Vec3 &v) const
  • Vec3 unitVector() const
  • bool isNearZero() const

The random namespace provides methods for generating random numbers:

• double random::randomDouble()
• double random::randomDouble(double min, double max)

The geometry namespace provides various geometric utilities:

• double geometry::degreesToRadians(double degrees)
• Vec3 geometry::randomPointInUnitSphere()
• Vec3 geometry::getRandomDirInHemisphere(const Vec3 &normal)
• Vec3 geometry::randomPointInUnitDisk()

The arithmetics namespace provides basic arithmetic utilities:

• double arithmetics::scale(double num, double inMin, double inMax, double outMin, double outMax)
• double arithmetics::clamp(double x, double min, double max)