Method rotate

src/Core/Transform/UnitVector.cpp:294–301

    }

    UnitVector UnitVector::rotate(double angle, UnitVector zero) const
    {
        const double radAngle = Utils::Math::convertToRadian(angle);
        Matrix2D rot({ std::cos(radAngle), -std::sin(radAngle), std::sin(radAngle),
            std::cos(radAngle) });
        const UnitVector result = rot.product(*this - zero) + zero;
        return result;
    }
    double UnitVector::distance(const UnitVector& vec) const
    {
        return std::sqrt(std::pow(x - vec.x, 2) + std::pow(y - vec.y, 2));