srba/models/observations_RelativePoses_2D.h

/* +---------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)               |
   |                          http://www.mrpt.org/                             |
   |                                                                           |
   | Copyright (c) 2005-2015, Individual contributors, see AUTHORS file        |
   | See: http://www.mrpt.org/Authors - All rights reserved.                   |
   | Released under BSD License. See details in http://www.mrpt.org/License    |
   +---------------------------------------------------------------------------+ */

#pragma once

#include <mrpt/tfest.h>  // for use in landmark_matcher<>

namespace srba {
namespace observations {
    struct RelativePoses_2D
    {
        static const size_t  OBS_DIMS = 3; 
        
        struct obs_data_t
        {
            double x,y;   
            double yaw;   

            template <class ARRAY>
            inline void getAsArray(ARRAY &obs) const {
                obs[0]=x; obs[1]=y; obs[2]=yaw;
            }
        };

        struct TObservationParams
        {
            // This type of observations has no further parameters.
        };
    };

    template <> struct landmark_matcher<RelativePoses_2D>
    {
        template <class POSE>
        static bool find_relative_pose(
            const mrpt::aligned_containers<RelativePoses_2D::obs_data_t>::vector_t & new_kf_obs,
            const mrpt::aligned_containers<RelativePoses_2D::obs_data_t>::vector_t & old_kf_obs,
            const RelativePoses_2D::TObservationParams &params,
            POSE &pose_new_kf_wrt_old_kf)
        {
            ASSERT_(new_kf_obs.size()==old_kf_obs.size())
            // Find the observation related to one of the two KFs connected by this new edge: it should have an exact (0,...,0) in its relative pose:
            for (size_t i=0;i<new_kf_obs.size();i++)
            {
                const RelativePoses_2D::obs_data_t & kf0 = new_kf_obs[i], &kf1 = old_kf_obs[i];
                if ( (kf0.x!=0 || kf0.y!=0 || kf0.yaw!=0) && 
                     (kf1.x!=0 || kf1.y!=0 || kf1.yaw!=0) )
                     continue; // skip.
                const mrpt::poses::CPose2D new_obs(kf0.x,kf0.y,kf0.yaw);
                const mrpt::poses::CPose2D old_obs(kf1.x,kf1.y,kf1.yaw);
                pose_new_kf_wrt_old_kf = POSE(old_obs-new_obs);
                return true;
            }
            return false; // None found (should not happen?)
        }
    };
}
} // end NS