edge_se2_line2d.h

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// 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
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//
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#ifndef G2O_EDGE_SE2_LINE2D_H
#define G2O_EDGE_SE2_LINE2D_H
 
#include "g2o/config.h"
#include "g2o/core/base_binary_edge.h"
#include "g2o/stuff/misc.h"
#include "g2o/types/slam2d/vertex_se2.h"
#include "g2o_types_slam2d_addons_api.h"
#include "vertex_line2d.h"
 
namespace g2o {
 
class G2O_TYPES_SLAM2D_ADDONS_API EdgeSE2Line2D
    : public BaseBinaryEdge<2, Line2D, VertexSE2, VertexLine2D> {
 public:
  EIGEN_MAKE_ALIGNED_OPERATOR_NEW
  EdgeSE2Line2D();
 
  void computeError() {
    const VertexSE2* v1 = static_cast<const VertexSE2*>(_vertices[0]);
    const VertexLine2D* l2 = static_cast<const VertexLine2D*>(_vertices[1]);
    Vector2 prediction = l2->estimate();
    SE2 iT = v1->estimate().inverse();
    prediction[0] += iT.rotation().angle();
    prediction[0] = normalize_theta(prediction[0]);
    Vector2 n(std::cos(prediction[0]), std::sin(prediction[0]));
    prediction[1] += n.dot(iT.translation());
    _error = prediction - _measurement;
    _error[0] = normalize_theta(_error[0]);
  }
 
  virtual bool setMeasurementData(const double* d) {
    _measurement[0] = d[0];
    _measurement[1] = d[1];
    return true;
  }
 
  virtual bool getMeasurementData(double* d) const {
    d[0] = _measurement[0];
    d[1] = _measurement[1];
    return true;
  }
 
  virtual int measurementDimension() const { return 2; }
 
  virtual bool setMeasurementFromState() {
    const VertexSE2* v1 = static_cast<const VertexSE2*>(_vertices[0]);
    const VertexLine2D* l2 = static_cast<const VertexLine2D*>(_vertices[1]);
    Vector2 prediction = l2->estimate();
    SE2 iT = v1->estimate().inverse();
    prediction[0] += iT.rotation().angle();
    prediction[0] = normalize_theta(prediction[0]);
    Vector2 n(std::cos(prediction[0]), std::sin(prediction[0]));
    prediction[1] += n.dot(iT.translation());
    _measurement = prediction;
    return true;
  }
 
  virtual bool read(std::istream& is);
  virtual bool write(std::ostream& os) const;
 
  virtual void initialEstimate(const OptimizableGraph::VertexSet& from,
                               OptimizableGraph::Vertex* to);
  virtual double initialEstimatePossible(
      const OptimizableGraph::VertexSet& from, OptimizableGraph::Vertex* to) {
    (void)to;
    return (from.count(_vertices[0]) == 1 ? 1.0 : -1.0);
  }
};
 
}  // namespace g2o
 
#endif