Example: poses_geometry_3D_example

C++ example source code:

/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2021, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include <mrpt/poses/CPoint3D.h>
#include <mrpt/poses/CPose2D.h>
#include <mrpt/poses/CPose3D.h>
#include <mrpt/system/CTicTac.h>

#include <iostream>

using namespace mrpt;
using namespace mrpt::poses;
using namespace mrpt::system;
using namespace std;

void TestGeometry3D2()
{
    CPose3D iniPoseVehicle(
        745.327749, 407.959716, 14.851070, -2.985091, 0.009412, 0.051315);

    CPoint3D GPSPosOnVehicle(-0.25, 0, 0.10);

    CPoint3D iniPoseGPS = iniPoseVehicle + GPSPosOnVehicle;

    printf(
        "Pose: %.6f,%.6f,%.6f", iniPoseGPS.x(), iniPoseGPS.y(), iniPoseGPS.z());
}
// ------------------------------------------------------
//                  TestGeometry3D
// ------------------------------------------------------
void TestGeometry3D()
{
    // The landmark (global) position: 3D (x,y,z)
    CPoint3D L(0, 4, 2);

    // Robot pose: 2D (x,y,phi)
    CPose2D R(2, 1, DEG2RAD(45.0f));

    // Camera pose relative to the robot: 6D (x,y,z,yaw,pitch,roll).
    CPose3D C(0.5f, 0.5f, 1.5f, DEG2RAD(-90.0f), 0.0_deg, DEG2RAD(-90.0f));

    // TEST 1. Relative position L' of the landmark wrt the camera
    // --------------------------------------------------------------
    cout << "L: " << L << endl;
    cout << "R: " << R << endl;
    cout << "C: " << C << endl;
    cout << "R+C:" << (R + C) << endl;
    // cout << (R+C).getHomogeneousMatrix();

    CPoint3D L2;
    CTicTac tictac;
    tictac.Tic();
    size_t i, N = 10000;
    for (i = 0; i < N; i++)
        L2 = L - (R + C);
    cout << "Computation in: " << 1e6 * tictac.Tac() / ((double)N) << " us"
         << endl;

    cout << "L': " << L2 << endl;

    // TEST 2. Reconstruct the landmark position:
    // --------------------------------------------------------------
    CPoint3D L3 = R + C + L2;
    cout << "R(+)C(+)L' = " << L3 << endl;
    cout << "Should be equal to L = " << L << endl;

    // TEST 3. Distance from the camera to the landmark
    // --------------------------------------------------------------
    cout << "|(R(+)C)-L|= " << (R + C).distanceTo(L) << endl;
    cout << "|L-(R(+)C)|= " << (R + C).distanceTo(L) << endl;
}

// ------------------------------------------------------
//                        MAIN
// ------------------------------------------------------
int main()
{
    try
    {
        TestGeometry3D();
        // TestGeometry3D2();
        return 0;
    }
    catch (exception& e)
    {
        std::cerr << "MRPT error: " << mrpt::exception_to_str(e) << std::endl;
        return -1;
    }
    catch (...)
    {
        cerr << "Untyped excepcion!!";
        return -1;
    }
}