50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/**
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* @file Pose2Constraint.H
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* @authors Frank Dellaert, Viorela Ila
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**/
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#include <map>
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#include "GaussianFactor.h"
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#include "VectorConfig.h"
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#include "Pose2.h"
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#include "Matrix.h"
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#include "Pose2Config.h"
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namespace gtsam {
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class Pose2Constraint : public Factor<Pose2Config> {
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private:
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std::string key1_, key2_; /** The keys of the two poses, order matters */
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Pose2 measured_;
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Matrix square_root_inverse_covariance_; /** sqrt(inv(measurement_covariance)) */
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public:
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Pose2Constraint(const std::string& key1, const std::string& key2,
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const Pose2& measured, const Matrix& measurement_covariance): key1_(key1),key2_(key2),measured_(measured) {
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square_root_inverse_covariance_ = inverse_square_root(measurement_covariance);
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}
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/** implement functions needed for Testable */
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void print(const std::string& name) const {}
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bool equals(const Factor<Pose2Config>& expected, double tol) const {return false;}
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/** implement functions needed to derive from Factor */
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double error(const Pose2Config& c) const {return 0;}
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std::list<std::string> keys() const { std::list<std::string> l; return l; }
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std::size_t size() const { return 2;}
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/** linearize */
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boost::shared_ptr<GaussianFactor> linearize(const Pose2Config& config) const {
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Pose2 p1 = config.get(key1_), p2 = config.get(key2_);
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Vector b = (measured_ - between(p1,p2)).vector();
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Matrix H1 = Dbetween1(p1,p2);
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Matrix H2 = Dbetween2(p1,p2);
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boost::shared_ptr<GaussianFactor> linearized(new GaussianFactor(
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key1_, square_root_inverse_covariance_ * H1,
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key2_, square_root_inverse_covariance_ * H2,
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b, 1.0));
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return linearized;
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}
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};
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} /// namespace gtsam
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