factor1Pose1Landmark2d.hpp

/* Copyright (c) 2022, Gonzalo Ferrer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *
 * factor1Pose1Landmark2d.hpp
 *
 *  Created on: Jul 27, 2020
 *      Author: Gonzalo Ferrer
 *              g.ferrer@skoltech.ru
 *              Mobile Robotics Lab.
 */

#ifndef FACTOR1POSE1LANDMARK2D_HPP_
#define FACTOR1POSE1LANDMARK2D_HPP_



#include "mrob/matrix_base.hpp"
#include "mrob/factor.hpp"

namespace mrob{

class Factor1Pose1Landmark2d : public Factor
{
  public:
    Factor1Pose1Landmark2d(const Mat21 &observation, std::shared_ptr<Node> &nodePose,
            std::shared_ptr<Node> &nodeLandmark, const Mat2 &obsInf, bool initializeLandmark=false,
            Factor::robustFactorType robust_type = Factor::robustFactorType::QUADRATIC);
    ~Factor1Pose1Landmark2d() override = default;
    void evaluate_residuals() override;
    void evaluate_jacobians() override;
    void evaluate_chi2() override;

    void print() const;

    MatRefConst get_obs() const {return obs_;};
    VectRefConst get_residual() const {return r_;};
    MatRefConst get_information_matrix() const {return W_;};
    MatRefConst get_jacobian([[maybe_unused]] mrob::factor_id_t id = 0) const {return J_;};

  protected:
    Mat21 obs_, r_, landmark_;
    Mat31 state_;
    matData_t dx_, dy_, q_; // increments from pose to landmark (x,y) and q squared L2 distance
    Mat2 W_;//inverse of observation covariance (information matrix)
    Mat<2,5> J_;//Joint Jacobian, Block will depend on order
    bool reversedNodeOrder_;//flag to keep order when building the adjacency matrix. This should be transparent for the user

  public:
    EIGEN_MAKE_ALIGNED_OPERATOR_NEW // as proposed by Eigen

};


}


#endif /* FACTOR1POSE1LANDMARK2D_HPP_ */