// g2o - General Graph Optimization
// Copyright (C) 2011 G. Grisetti, R. Kuemmerle, 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
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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#include "sensor_se3_prior.h"

#include <cassert>

namespace g2o {
using namespace std;

// SensorSE3Prior
SensorSE3Prior::SensorSE3Prior(const std::string& name_)
    : UnarySensor<Robot3D, EdgeSE3Prior>(name_) {
  _offsetParam = 0;
  _information.setIdentity();
  _information *= 1000;
  _information(2, 2) = 10;
  setInformation(_information);
}

void SensorSE3Prior::addParameters() {
  if (!_offsetParam) _offsetParam = new ParameterSE3Offset();
  assert(world());
  world()->addParameter(_offsetParam);
}

void SensorSE3Prior::addNoise(EdgeType* e) {
  EdgeType::ErrorVector _n = _sampler.generateSample();
  EdgeType::Measurement n = internal::fromVectorMQT(_n);
  e->setMeasurement(e->measurement() * n);
  e->setInformation(information());
}

void SensorSE3Prior::sense() {
  if (!_offsetParam) {
    return;
  }
  _robotPoseObject = 0;
  RobotType* r = dynamic_cast<RobotType*>(robot());
  std::list<PoseObject*>::reverse_iterator it = r->trajectory().rbegin();
  int count = 0;
  while (it != r->trajectory().rend() && count < 1) {
    if (!_robotPoseObject) _robotPoseObject = *it;
    ++it;
    count++;
  }
  if (!_robotPoseObject) return;
  _sensorPose = _robotPoseObject->vertex()->estimate() * _offsetParam->offset();
  EdgeType* e = mkEdge();
  if (e && graph()) {
    e->setParameterId(0, _offsetParam->id());
    graph()->addEdge(e);
    e->setMeasurementFromState();
    addNoise(e);
  }
}

}  // namespace g2o
