GaussianBayesTree.h

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/* ----------------------------------------------------------------------------
 
 * GTSAM Copyright 2010, Georgia Tech Research Corporation,
 * Atlanta, Georgia 30332-0415
 * All Rights Reserved
 * Authors: Frank Dellaert, et al. (see THANKS for the full author list)
 
 * See LICENSE for the license information
 
 * -------------------------------------------------------------------------- */
 
#pragma once
 
#include <gtsam/linear/GaussianBayesNet.h>
#include <gtsam/linear/GaussianFactorGraph.h>
#include <gtsam/inference/BayesTree.h>
#include <gtsam/inference/BayesTreeCliqueBase.h>
 
namespace gtsam {
 
  // Forward declarations
  class GaussianConditional;
  class VectorValues;
 
  /* ************************************************************************* */
  class GTSAM_EXPORT GaussianBayesTreeClique :
    public BayesTreeCliqueBase<GaussianBayesTreeClique, GaussianFactorGraph>
  {
  public:
    typedef GaussianBayesTreeClique This;
    typedef BayesTreeCliqueBase<GaussianBayesTreeClique, GaussianFactorGraph> Base;
    typedef boost::shared_ptr<This> shared_ptr;
    typedef boost::weak_ptr<This> weak_ptr;
    GaussianBayesTreeClique() {}
    virtual ~GaussianBayesTreeClique() {}
    GaussianBayesTreeClique(const boost::shared_ptr<GaussianConditional>& conditional) : Base(conditional) {}
  };
 
  /* ************************************************************************* */
  class GTSAM_EXPORT GaussianBayesTree :
    public BayesTree<GaussianBayesTreeClique>
  {
  private:
    typedef BayesTree<GaussianBayesTreeClique> Base;
 
  public:
    typedef GaussianBayesTree This;
    typedef boost::shared_ptr<This> shared_ptr;
 
    GaussianBayesTree() {}
 
    bool equals(const This& other, double tol = 1e-9) const;
 
    VectorValues optimize() const;
 
    VectorValues optimizeGradientSearch() const;
 
    VectorValues gradient(const VectorValues& x0) const;
 
    VectorValues gradientAtZero() const;
 
    double error(const VectorValues& x) const;
 
    double determinant() const;
 
    double logDeterminant() const;
 
    Matrix marginalCovariance(Key key) const;
  };
 
  template<>
  struct traits<GaussianBayesTree> : public Testable<GaussianBayesTree> {
  };
 
} //\ namespace gtsam