120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
/**
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* @file simulated2D.h
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* @brief measurement functions and derivatives for simulated 2D robot
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* @author Frank Dellaert
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*/
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// \callgraph
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#pragma once
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#include "Point2.h"
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#include "TupleConfig.h"
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#include "NonlinearFactor.h"
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// \namespace
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namespace gtsam {
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namespace simulated2D {
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// Simulated2D robots have no orientation, just a position
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typedef TypedSymbol<Point2, 'x'> PoseKey;
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typedef TypedSymbol<Point2, 'l'> PointKey;
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typedef PairConfig<PoseKey, Point2, PointKey, Point2> Config;
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/**
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* Prior on a single pose, and optional derivative version
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*/
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inline Point2 prior(const Point2& x) {
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return x;
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}
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Point2 prior(const Point2& x, boost::optional<Matrix&> H = boost::none);
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/**
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* odometry between two poses, and optional derivative version
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*/
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inline Point2 odo(const Point2& x1, const Point2& x2) {
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return x2 - x1;
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}
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Point2 odo(const Point2& x1, const Point2& x2, boost::optional<Matrix&> H1 =
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boost::none, boost::optional<Matrix&> H2 = boost::none);
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/**
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* measurement between landmark and pose, and optional derivative version
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*/
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inline Point2 mea(const Point2& x, const Point2& l) {
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return l - x;
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}
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Point2 mea(const Point2& x, const Point2& l, boost::optional<Matrix&> H1 =
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boost::none, boost::optional<Matrix&> H2 = boost::none);
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/**
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* Unary factor encoding a soft prior on a vector
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*/
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template<class Cfg = Config, class Key = PoseKey>
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struct GenericPrior: public NonlinearFactor1<Cfg, Key, Point2> {
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Point2 z_;
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GenericPrior(const Point2& z, const SharedGaussian& model, const Key& key) :
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NonlinearFactor1<Cfg, Key, Point2> (model, key), z_(z) {
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}
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Vector evaluateError(const Point2& x, boost::optional<Matrix&> H =
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boost::none) const {
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return (prior(x, H) - z_).vector();
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}
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};
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/**
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* Binary factor simulating "odometry" between two Vectors
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*/
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template<class Cfg = Config, class Key = PoseKey>
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struct GenericOdometry: public NonlinearFactor2<Cfg, Key, Point2, Key,
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Point2> {
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Point2 z_;
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GenericOdometry(const Point2& z, const SharedGaussian& model,
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const Key& i1, const Key& i2) :
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NonlinearFactor2<Cfg, Key, Point2, Key, Point2> (model, i1, i2), z_(z) {
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}
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Vector evaluateError(const Point2& x1, const Point2& x2, boost::optional<
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Matrix&> H1 = boost::none, boost::optional<Matrix&> H2 = boost::none) const {
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return (odo(x1, x2, H1, H2) - z_).vector();
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}
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};
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/**
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* Binary factor simulating "measurement" between two Vectors
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*/
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template<class Cfg = Config, class XKey = PoseKey, class LKey = PointKey>
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class GenericMeasurement: public NonlinearFactor2<Cfg, XKey, Point2, LKey,
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Point2> {
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public:
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Point2 z_;
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GenericMeasurement(const Point2& z, const SharedGaussian& model,
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const XKey& i, const LKey& j) :
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NonlinearFactor2<Cfg, XKey, Point2, LKey, Point2> (model, i, j), z_(z) {
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}
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Vector evaluateError(const Point2& x1, const Point2& x2, boost::optional<
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Matrix&> H1 = boost::none, boost::optional<Matrix&> H2 = boost::none) const {
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return (mea(x1, x2, H1, H2) - z_).vector();
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}
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};
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/** Typedefs for regular use */
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typedef GenericPrior<Config, PoseKey> Prior;
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typedef GenericOdometry<Config, PoseKey> Odometry;
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typedef GenericMeasurement<Config, PoseKey, PointKey> Measurement;
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} // namespace simulated2D
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} // namespace gtsam
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