solver_WQ_approx_helper.h

// LibQPEP: A Library for Globally Optimal Solving Quadratic Pose Estimation Problems,
//          It also gives highly accurate uncertainty description of the solutions.
//
// Author: Jin Wu
// Affiliation: Hong Kong University of Science and Technology (HKUST)
// Emails: jin_wu_uestc@hotmail.com; jwucp@connect.ust.hk
// Reference: Wu, J., et al. (2022) Quadratic Pose Estimation Problems: 
//                                  Globally Optimal Solutions, 
//                                  Solvability/Observability Analysis,
//                                  and Uncertainty Description.
//                                  IEEE Transactions on Robotics.
//                                  https://doi.org/10.1109/TRO.2022.3155880

#ifndef LIBQPEP_SOLVER_WQ_APPROX_HELPER_H
#define LIBQPEP_SOLVER_WQ_APPROX_HELPER_H

#include <time.h>
#include <iostream>
#include <vector>
#include <map>
#include <cassert>

#include <Eigen/Core>
#include <Eigen/LU>
#include <Eigen/Dense>
#include <Eigen/Sparse>
#include <Eigen/Geometry> // For Quaternion


void data_func_WQ_approx_sparse(Eigen::SparseMatrix<double>& tmp,
                                          Eigen::MatrixXd& tmp2,
                                          const Eigen::VectorXd& data);


#endif //LIBQPEP_SOLVER_WQ_APPROX_HELPER_H