edge_se2_pure_calib.cpp

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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
//   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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#include "edge_se2_pure_calib.h"
 
namespace g2o {
 
EdgeSE2PureCalib::EdgeSE2PureCalib() {}
 
bool EdgeSE2PureCalib::read(std::istream& is) {
  (void)is;
  return false;
}
 
bool EdgeSE2PureCalib::write(std::ostream& os) const {
  (void)os;
  return false;
}
 
void EdgeSE2PureCalib::computeError() {
  const VertexSE2* laserOffset = static_cast<const VertexSE2*>(_vertices[0]);
  const VertexOdomDifferentialParams* odomParams =
      dynamic_cast<const VertexOdomDifferentialParams*>(_vertices[1]);
 
  // get the calibrated motion given by the odometry
  VelocityMeasurement calibratedVelocityMeasurement(
      measurement().velocityMeasurement.vl() * odomParams->estimate()(0),
      measurement().velocityMeasurement.vr() * odomParams->estimate()(1),
      measurement().velocityMeasurement.dt());
  MotionMeasurement mm = OdomConvert::convertToMotion(
      calibratedVelocityMeasurement, odomParams->estimate()(2));
  SE2 Ku_ij;
  Ku_ij.fromVector(mm.measurement());
 
  SE2 laserMotionInRobotFrame = laserOffset->estimate() *
                                measurement().laserMotion *
                                laserOffset->estimate().inverse();
  SE2 delta = Ku_ij.inverse() * laserMotionInRobotFrame;
  _error = delta.toVector();
}
 
}  // namespace g2o