Eigen::Vector3f v1(1, 2, 3); Eigen::Vector3f v2(4, 5, 6); Eigen::Vector3f v3 = v1 + v2; std::cout << "v3 = " << v3 << std::endl;
Eigen::Vector3f v1(1, 2, 3); Eigen::Vector3f v2(4, 5, 6); float dot_product = v1.dot(v2); std::cout << "dot_product = " << dot_product << std::endl;This example creates two vectors v1 and v2, calculates their dot product using the dot() member function, and stores the result in the float variable dot_product. The output is "dot_product = 32". Eigen belongs to the package library of linear algebra C++ libraries.