CEllipsoidInverseDepth2D.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2018, 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 |
   +------------------------------------------------------------------------+ */
#ifndef opengl_CEllipsoidInverseDepth2D_H
#define opengl_CEllipsoidInverseDepth2D_H

#include <mrpt/opengl/CGeneralizedEllipsoidTemplate.h>

namespace mrpt::opengl
{
/** An especial "ellipsoid" in 3D computed as the uncertainty iso-surfaces of a
 * (inv_range,yaw) variable.
  *  The parameter space of this ellipsoid comprises these variables (in this
 * order):
  *   - inv_range: The inverse distance from the sensor to the feature.
  *   - yaw: Angle for the rotation around +Z ("azimuth").
  *
  *  This parameterization is a 2D version of that presented in the paper:
  *   - Civera, J. and Davison, A.J. and Montiel, J., "Inverse depth
 * parametrization for monocular SLAM", T-RO, 2008.
  *
  *  This class expects you to provide a mean vector of length 4 and a 4x4
 * covariance matrix, set with \a setCovMatrixAndMean().
  *
  * Please read the documentation of
 * CGeneralizedEllipsoidTemplate::setQuantiles() for learning
  *  the mathematical details about setting the desired confidence interval.
  *
  *  <div align="center">
  *  <table border="0" cellspan="4" cellspacing="4" style="border-width: 1px;
 * border-style: solid;">
  *   <tr> <td> mrpt::opengl::CEllipsoidInverseDepth2D </td> <td> \image html
 * preview_CEllipsoidInverseDepth2D.png </td> </tr>
  *  </table>
  *  </div>
  *
  * \ingroup mrpt_opengl_grp
  */
class CEllipsoidInverseDepth2D : public CGeneralizedEllipsoidTemplate<2>
{
    using BASE = CGeneralizedEllipsoidTemplate<2>;
    DEFINE_SERIALIZABLE(CEllipsoidInverseDepth2D)

   public:
    /** The maximum range to be used as a correction when a point of the
     * ellipsoid falls in the negative ranges (default: 1e6) */
    void setUnderflowMaxRange(const double maxRange)
    {
        m_underflowMaxRange = maxRange;
    }
    double getUnderflowMaxRange() const { return m_underflowMaxRange; }
   protected:
    /** To be implemented by derived classes: maps, using some arbitrary space
     * transformation, a list of points
      *  defining an ellipsoid in parameter space into their corresponding
     * points in 2D/3D space.
      */
    virtual void transformFromParameterSpace(
        const std::vector<BASE::array_parameter_t>& in_pts,
        std::vector<BASE::array_point_t>& out_pts) const override;

   private:
    double m_underflowMaxRange;

   public:
    /** Constructor
      */
    CEllipsoidInverseDepth2D() : m_underflowMaxRange(1e6) {}
    /** Private, virtual destructor: only can be deleted from smart pointers */
    virtual ~CEllipsoidInverseDepth2D() {}
};

}
#endif