55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
/* ----------------------------------------------------------------------------
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* GTSAM Copyright 2010, Georgia Tech Research Corporation,
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* Atlanta, Georgia 30332-0415
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* All Rights Reserved
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* Authors: Frank Dellaert, et al. (see THANKS for the full author list)
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* See LICENSE for the license information
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* -------------------------------------------------------------------------- */
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/**
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* @file Pose2SLAMExample_graph->cpp
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* @brief Read graph from file and perform GraphSLAM
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* @date June 3, 2012
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* @author Frank Dellaert
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*/
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#include <gtsam/slam/dataset.h>
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#include <gtsam/slam/pose2SLAM.h>
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#include <gtsam/nonlinear/Marginals.h>
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#include <boost/tuple/tuple.hpp>
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#include <cmath>
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using namespace std;
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using namespace gtsam;
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using namespace gtsam::noiseModel;
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int main(int argc, char** argv) {
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// Read File and create graph and initial estimate
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// we are in build/examples, data is in examples/Data
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pose2SLAM::Graph::shared_ptr graph ;
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pose2SLAM::Values::shared_ptr initial;
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SharedDiagonal model = Diagonal::Sigmas(Vector_(3, 0.05, 0.05, 5.0*M_PI/180.0));
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boost::tie(graph,initial) = load2D("../../examples/Data/w100-odom.graph",model);
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initial->print("Initial estimate:\n");
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// Add a Gaussian prior on first poses
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Pose2 priorMean(0.0, 0.0, 0.0); // prior at origin
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SharedDiagonal priorNoise = Diagonal::Sigmas(Vector_(3, 0.01, 0.01, 0.01));
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graph->addPosePrior(0, priorMean, priorNoise);
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// Single Step Optimization using Levenberg-Marquardt
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pose2SLAM::Values result = graph->optimize(*initial);
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result.print("\nFinal result:\n");
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// Plot the covariance of the last pose
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Marginals marginals(*graph, result);
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cout.precision(2);
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cout << "\nP3:\n" << marginals.marginalCovariance(99) << endl;
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return 0;
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}
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