// g2o - General Graph Optimization
// Copyright (C) 2011 R. Kuemmerle, G. Grisetti, W. Burgard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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#ifndef G2O_EDGE_POINTXY_H
#define G2O_EDGE_POINTXY_H

#include "g2o/config.h"
#include "g2o/core/base_binary_edge.h"
#include "g2o_types_slam2d_api.h"
#include "vertex_point_xy.h"

namespace g2o {

class G2O_TYPES_SLAM2D_API EdgePointXY
    : public BaseBinaryEdge<2, Vector2, VertexPointXY, VertexPointXY> {
 public:
  EIGEN_MAKE_ALIGNED_OPERATOR_NEW;
  EdgePointXY();

  void computeError() {
    const VertexPointXY* v1 = static_cast<const VertexPointXY*>(_vertices[0]);
    const VertexPointXY* v2 = static_cast<const VertexPointXY*>(_vertices[1]);
    _error = (v2->estimate() - v1->estimate()) - _measurement;
  }
  virtual bool read(std::istream& is);
  virtual bool write(std::ostream& os) const;

  virtual void setMeasurement(const Vector2& m) { _measurement = m; }

  virtual bool setMeasurementData(const double* d) {
    _measurement = Vector2(d[0], d[1]);
    return true;
  }

  virtual bool getMeasurementData(double* d) const {
    Eigen::Map<Vector2> m(d);
    m = _measurement;
    return true;
  }

  virtual int measurementDimension() const { return 2; }

  virtual bool setMeasurementFromState() {
    const VertexPointXY* v1 = static_cast<const VertexPointXY*>(_vertices[0]);
    const VertexPointXY* v2 = static_cast<const VertexPointXY*>(_vertices[1]);
    _measurement = v2->estimate() - v1->estimate();
    return true;
  }

  virtual double initialEstimatePossible(const OptimizableGraph::VertexSet&,
                                         OptimizableGraph::Vertex*) {
    return 0;
  }
#ifndef NUMERIC_JACOBIAN_TWO_D_TYPES
  virtual void linearizeOplus();
#endif
};

}  // namespace g2o

#endif
