inline double2 un_m_add2d(double2 a, double2 b) {
    double2 result;
    result.x = a.x + b.x;
    result.y = a.y + b.y;
    return result;
}

inline double3 un_m_add3d(double3 a, double3 b) {
    double3 result;
    result.x = a.x + b.x;
    result.y = a.y + b.y;
    result.z = a.z + b.z;
    return result;
}

inline double4 un_m_add4d(double4 a, double4 b) {
    double4 result;
    result.x = a.x + b.x;
    result.y = a.y + b.y;
    result.z = a.z + b.z;
    result.w = a.w + b.w;
    return result;
}

inline double2 un_m_sub2d(double2 a, double2 b) {
    double2 result;
    result.x = a.x - b.x;
    result.y = a.y - b.y;
    return result;
}

inline double3 un_m_sub3d(double3 a, double3 b) {
    double3 result;
    result.x = a.x - b.x;
    result.y = a.y - b.y;
    result.z = a.z - b.z;
    return result;
}

inline double4 un_m_sub4d(double4 a, double4 b) {
    double4 result;
    result.x = a.x - b.x;
    result.y = a.y - b.y;
    result.z = a.z - b.z;
    result.w = a.w - b.w;
    return result;
}

inline double2 un_m_add_scalar2d(double2 a, double scalar) {
    double2 result;
    result.x = a.x + scalar;
    result.y = a.y + scalar;
    return result;
}

inline double3 un_m_add_scalar3d(double3 a, double scalar) {
    double3 result;
    result.x = a.x + scalar;
    result.y = a.y + scalar;
    result.z = a.z + scalar;
    return result;
}

inline double4 un_m_add_scalar4d(double4 a, double scalar) {
    double4 result;
    result.x = a.x + scalar;
    result.y = a.y + scalar;
    result.z = a.z + scalar;
    result.w = a.w + scalar;
    return result;
}

inline double2 un_m_sub_scalar2d(double2 a, double scalar) {
    double2 result;
    result.x = a.x - scalar;
    result.y = a.y - scalar;
    return result;
}

inline double3 un_m_sub_scalar3d(double3 a, double scalar) {
    double3 result;
    result.x = a.x - scalar;
    result.y = a.y - scalar;
    result.z = a.z - scalar;
    return result;
}

inline double4 un_m_sub_scalar4d(double4 a, double scalar) {
    double4 result;
    result.x = a.x - scalar;
    result.y = a.y - scalar;
    result.z = a.z - scalar;
    result.w = a.w - scalar;
    return result;
}

inline double2 un_m_mul_scalar2d(double2 a, double scalar) {
    double2 result;
    result.x = a.x * scalar;
    result.y = a.y * scalar;
    return result;
}

inline double3 un_m_mul_scalar3d(double3 a, double scalar) {
    double3 result;
    result.x = a.x * scalar;
    result.y = a.y * scalar;
    result.z = a.z * scalar;
    return result;
}

inline double4 un_m_mul_scalar4d(double4 a, double scalar) {
    double4 result;
    result.x = a.x * scalar;
    result.y = a.y * scalar;
    result.z = a.z * scalar;
    result.w = a.w * scalar;
    return result;
}

inline double2 un_m_div_scalar2d(double2 a, double scalar) {
    double2 result;
    result.x = a.x / scalar;
    result.y = a.y / scalar;
    return result;
}

inline double3 un_m_div_scalar3d(double3 a, double scalar) {
    double3 result;
    result.x = a.x / scalar;
    result.y = a.y / scalar;
    result.z = a.z / scalar;
    return result;
}

inline double4 un_m_div_scalar4d(double4 a, double scalar) {
    double4 result;
    result.x = a.x / scalar;
    result.y = a.y / scalar;
    result.z = a.z / scalar;
    result.w = a.w / scalar;
    return result;
}

inline double un_m_dot2d(double2 a, double2 b) {
    return a.x * b.x + a.y * b.y;
}

inline double un_m_dot3d(double3 a, double3 b) {
    return a.x * b.x + a.y * b.y + a.z * b.z;
}

inline double un_m_dot4d(double4 a, double4 b) {
    return a.x * b.x + a.y * b.y + a.z * b.z + a.w * b.w;
}

inline double2 un_m_hadamard2d(double2 a, double2 b) {
    double2 result;
    result.x = a.x * b.x;
    result.y = a.y * b.y;
    return result;
}

inline double3 un_m_hadamard3d(double3 a, double3 b) {
    double3 result;
    result.x = a.x * b.x;
    result.y = a.y * b.y;
    result.z = a.z * b.z;
    return result;
}

inline double4 un_m_hadamard4d(double4 a, double4 b) {
    double4 result;
    result.x = a.x * b.x;
    result.y = a.y * b.y;
    result.z = a.z * b.z;
    result.w = a.w * b.w;
    return result;
}

inline double2 un_m_cross2d(double2 a) {
    double2 result;
    result.x = a.y;
    result.y =-a.x;
    return result;
}

inline double3 un_m_cross3d(double3 a, double3 b) {
    double3 result;
	result.x = a.y * b.z - a.z * b.y;
	result.y = a.z * b.x - a.x * b.z;
	result.z = a.x * b.y - a.y * b.x;
    return result;
}

inline double un_m_magnitude2d(double2 a) {
    return sqrt(a.x * a.x + a.y * a.y);
}

inline double un_m_magnitude3d(double3 a) {
    return sqrt(a.x * a.x + a.y * a.y + a.z * a.z);
}

inline double un_m_magnitude4d(double4 a) {
    return sqrt(a.x * a.x + a.y * a.y + a.z * a.z + a.w * a.w);
}

inline double un_m_magnitude_sqr2d(double2 a) {
    return a.x * a.x + a.y * a.y;
}

inline double un_m_magnitude_sqr3d(double3 a) {
    return a.x * a.x + a.y * a.y + a.z * a.z;
}

inline double un_m_magnitude_sqr4d(double4 a) {
    return a.x * a.x + a.y * a.y + a.z * a.z + a.w * a.w;
}

inline double un_m_distance2d(double2 a, double2 b) {
    double2 result;

    result.x = b.x - a.x;
    result.y = b.y - a.y;

    return sqrt(result.x * result.x + result.y * result.y);
}

inline double un_m_distance3d(double3 a, double3 b) {
    double3 result;

    result.x = b.x - a.x;
    result.y = b.y - a.y;
    result.z = b.z - a.z;

    return sqrt(result.x * result.x + result.y * result.y + result.z * result.z);
}

inline double un_m_distance4d(double4 a, double4 b) {
    double4 result;

    result.x = b.x - a.x;
    result.y = b.y - a.y;
    result.z = b.z - a.z;
    result.w = b.w - a.w;

    return sqrt(result.x * result.x + result.y * result.y + result.z * result.z + result.w * result.w);
}

inline double un_m_distance_sqr2d(double2 a, double2 b) {
    double2 result;

    result.x = b.x - a.x;
    result.y = b.y - a.y;

    return result.x * result.x + result.y * result.y;
}

inline double un_m_distance_sqr3d(double3 a, double3 b) {
    double3 result;

    result.x = b.x - a.x;
    result.y = b.y - a.y;
    result.z = b.z - a.z;

    return result.x * result.x + result.y * result.y + result.z * result.z;
}

inline double un_m_distance_sqr4d(double4 a, double4 b) {
    double4 result;

    result.x = b.x - a.x;
    result.y = b.y - a.y;
    result.z = b.z - a.z;
    result.w = b.w - a.w;

    return result.x * result.x + result.y * result.y + result.z * result.z + result.w * result.w;
}

inline double2 un_m_normalize2d(double2 a) {
    double2 result;
    double mag;

    mag = sqrt(a.x * a.x + a.y * a.y);

    result.x = a.x / mag;
    result.y = a.y / mag;

    return result;
}

inline double3 un_m_normalize3d(double3 a) {
    double3 result;
    double mag;

    mag = sqrt(a.x * a.x + a.y * a.y + a.z * a.z);

    result.x = a.x / mag;
    result.y = a.y / mag;
    result.z = a.z / mag;

    return result;
}

inline double4 un_m_normalize4d(double4 a) {
    double4 result;
    double mag;

    mag = sqrt(a.x * a.x + a.y * a.y + a.z * a.z + a.w * a.w);

    result.x = a.x / mag;
    result.y = a.y / mag;
    result.z = a.z / mag;
    result.w = a.w / mag;

    return result;
}

inline double2 un_m_project2d(double2 a, double2 onto) {
    double d;
    double2 result;

    d  = a.x * onto.x + a.y * onto.y;
    d /= onto.x * onto.x + onto.y * onto.y;

    result.x = onto.x * d;
    result.y = onto.y * d;

    return result;
}

inline double3 un_m_project3d(double3 a, double3 onto) {
    double d;
    double3 result;

    d  = a.x    * onto.x + a.y    * onto.y + a.z    * onto.z;
    d /= onto.x * onto.x + onto.y * onto.y + onto.z * onto.z;

    result.x = onto.x * d;
    result.y = onto.y * d;
    result.z = onto.z * d;

    return result;
}

inline double4 un_m_project4d(double4 a, double4 onto) {
    double d;
    double4 result;

    d  = a.x * onto.x + a.y * onto.y + a.z * onto.z + a.w * onto.w;
    d /= onto.x * onto.x + onto.y * onto.y + onto.z * onto.z + onto.w * onto.w;

    result.x = onto.x * d;
    result.y = onto.y * d;
    result.z = onto.z * d;
    result.w = onto.w * d;

    return result;
}

inline double2 un_m_reflect2d(double2 a, double2 normal) {
    double d;
    double2 result;

    d        = a.x * normal.x + a.y * normal.y;
    result.x = normal.x * d * 2.0;
    result.y = normal.y * d * 2.0;

    result.x -= a.x;
    result.y -= a.y;

    return result;
}

inline double3 un_m_reflect3d(double3 a, double3 normal) {
    double d;
    double3 result;

    d        = a.x * normal.x + a.y * normal.y + a.z * normal.z;

    result.x = normal.x * d * 2.0;
    result.y = normal.y * d * 2.0;
    result.z = normal.z * d * 2.0;

    result.x -= a.x;
    result.y -= a.y;
    result.z -= a.z;

    return result;
}

inline double4 un_m_reflect4d(double4 a, double4 normal) {
    double d;
    double4 result;

    d        = a.x * normal.x + a.y * normal.y + a.z * normal.z + a.w * normal.w;

    result.x = normal.x * d * 2.0;
    result.y = normal.y * d * 2.0;
    result.z = normal.z * d * 2.0;
    result.w = normal.w * d * 2.0;

    result.x -= a.x;
    result.y -= a.y;
    result.z -= a.z;
    result.w -= a.w;

    return result;
}