testFeature.cpp

Shows how to build a task with a visual feature.

/*
 * ViSP, open source Visual Servoing Platform software.
 * Copyright (C) 2005 - 2024 by Inria. All rights reserved.
 *
 * This software is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See https://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * Visual feature manipulation.
 */
 
#include <visp3/blob/vpDot2.h>
#include <visp3/core/vpCameraParameters.h>
#include <visp3/core/vpColVector.h>
#include <visp3/core/vpHomogeneousMatrix.h>
#include <visp3/core/vpRotationMatrix.h>
#include <visp3/core/vpTranslationVector.h>
#include <visp3/visual_features/vpFeatureBuilder.h>
#include <visp3/visual_features/vpFeaturePoint.h>
#include <visp3/visual_features/vpFeatureThetaU.h>
#include <visp3/visual_features/vpGenericFeature.h>
#include <visp3/vs/vpServo.h>
 
#include <iostream>

int main()
{
#ifdef ENABLE_VISP_NAMESPACE
  using namespace VISP_NAMESPACE_NAME;
#endif
  try {
    for (int i = 0; i < 3; i++) {
      vpServo task;
 
      // Creation od a Theta U vector that represent the rotation
      // between the desired camera frame and the current one.
      vpThetaUVector tu_cdRc; // Current visual feature s
      tu_cdRc[0] = 0.1;
      tu_cdRc[1] = 0.2;
      tu_cdRc[2] = 0.3;
 
      // Creation of the current feature s
      vpFeatureThetaU s(vpFeatureThetaU::cdRc);
      s.buildFrom(tu_cdRc);
      s.print();
      task.addFeature(s); // Add current ThetaU feature
 
      // Creation of the desired feature s^*
      vpFeatureThetaU s_star(vpFeatureThetaU::cdRc); // init to zero
 
      // Compute the interaction matrix for the ThetaU_z feature
      vpMatrix L_z = s.interaction(vpFeatureThetaU::selectTUz());
      // Compute the error vector (s-s^*) for the ThetaU_z feature
      s.error(s_star, vpFeatureThetaU::selectTUz());
 
      std::cout << "End, call vpServo destructors..." << std::endl;
    }
    return EXIT_SUCCESS;
  }
  catch (const vpException &e) {
    std::cout << "Catch an exception: " << e << std::endl;
    return EXIT_FAILURE;
  }
}