125 lines
3.5 KiB
C++
125 lines
3.5 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 Similarity3.cpp
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* @brief Implementation of Similarity3 transform
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* @author Paul Drews
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*/
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#include <gtsam_unstable/geometry/Similarity3.h>
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#include <gtsam/geometry/Rot3.h>
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#include <gtsam/geometry/Point3.h>
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#include <gtsam/geometry/Pose3.h>
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#include <gtsam/base/Manifold.h>
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namespace gtsam {
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Similarity3::Similarity3(const Matrix3& R, const Vector3& t, double s) :
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R_(R), t_(t), s_(s) {
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}
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Similarity3::Similarity3() :
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R_(), t_(), s_(1){
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}
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Similarity3::Similarity3(double s) :
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s_ (s) {
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}
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Similarity3::Similarity3(const Rotation& R, const Translation& t, double s) :
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R_ (R), t_ (t), s_ (s) {
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}
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Similarity3::operator Pose3() const {
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return Pose3(R_, s_*t_);
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}
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Similarity3 Similarity3::identity() {
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return Similarity3(); }
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//Vector7 Similarity3::Logmap(const Similarity3& s, OptionalJacobian<7, 7> Hm) {
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// return Vector7();
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//}
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//
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//Similarity3 Similarity3::Expmap(const Vector7& v, OptionalJacobian<7, 7> Hm) {
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// return Similarity3();
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//}
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bool Similarity3::operator==(const Similarity3& other) const {
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return (R_.equals(other.R_)) && (t_ == other.t_) && (s_ == other.s_);
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}
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bool Similarity3::equals(const Similarity3& sim, double tol) const {
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return R_.equals(sim.R_, tol) && t_.equals(sim.t_, tol)
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&& s_ < (sim.s_+tol) && s_ > (sim.s_-tol);
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}
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Similarity3::Translation Similarity3::transform_from(const Translation& p) const {
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return R_ * (s_ * p) + t_;
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}
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Matrix7 Similarity3::AdjointMap() const{
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const Matrix3 R = R_.matrix();
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const Vector3 t = t_.vector();
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Matrix3 A = s_ * skewSymmetric(t) * R;
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Matrix7 adj;
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adj << s_*R, A, -s_*t, Z_3x3, R, Eigen::Matrix<double, 3, 1>::Zero(), Eigen::Matrix<double, 1, 6>::Zero(), 1;
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return adj;
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}
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inline Similarity3::Translation Similarity3::operator*(const Translation& p) const {
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return transform_from(p);
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}
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Similarity3 Similarity3::inverse() const {
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Rotation Rt = R_.inverse();
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Translation sRt = R_.inverse() * (-s_ * t_);
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return Similarity3(Rt, sRt, 1.0/s_);
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}
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Similarity3 Similarity3::operator*(const Similarity3& T) const {
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return Similarity3(R_ * T.R_, ((1.0/T.s_)*t_) + R_ * T.t_, s_*T.s_);
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}
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void Similarity3::print(const std::string& s) const {
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std::cout << std::endl;
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std::cout << s;
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rotation().print("R:\n");
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translation().print("t: ");
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std::cout << "s: " << scale() << std::endl;
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}
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Similarity3 Similarity3::ChartAtOrigin::Retract(const Vector7& v, ChartJacobian H) {
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// Will retracting or localCoordinating R work if R is not a unit rotation?
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// Also, how do we actually get s out? Seems like we need to store it somewhere.
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Rotation r; //Create a zero rotation to do our retraction.
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return Similarity3( //
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r.retract(v.head<3>()), // retract rotation using v[0,1,2]
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Translation(v.segment<3>(3)), // Retract the translation
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1.0 + v[6]); //finally, update scale using v[6]
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}
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Vector7 Similarity3::ChartAtOrigin::Local(const Similarity3& other, ChartJacobian H) {
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Rotation r; //Create a zero rotation to do the retraction
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Vector7 v;
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v.head<3>() = r.localCoordinates(other.R_);
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v.segment<3>(3) = other.t_.vector();
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//v.segment<3>(3) = translation().localCoordinates(other.translation());
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v[6] = other.s_ - 1.0;
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return v;
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}
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}
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