sonarPioneerReader.cpp

example showing how to connect and read sonar data from a Pioneer mobile robot->

/****************************************************************************
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2017 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
 * ("GPL") version 2 as published by the Free Software Foundation.
 * 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 http://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:
 * Example that shows how to control a Pioneer mobile robot in ViSP.
 *
 * Authors:
 * Fabien Spindler
 *
 *****************************************************************************/

#include <iostream>

#include <visp3/robot/vpRobotPioneer.h> // Include before vpDisplayX to avoid build issues
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpDisplay.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/core/vpImage.h>
#include <visp3/core/vpIoTools.h>
#include <visp3/io/vpImageIo.h>
#include <visp3/core/vpTime.h>

#ifndef VISP_HAVE_PIONEER
int main()
{
  std::cout << "\nThis example requires Aria 3rd party library. You should install it.\n"
            << std::endl;
  return 0;
}

#else

ArSonarDevice sonar;
vpRobotPioneer *robot;
#if defined(VISP_HAVE_X11)
vpDisplayX *d;
#elif defined (VISP_HAVE_GDI)
vpDisplayGDI *d;
#endif
vpImage<unsigned char> I;
static bool isInitialized = false;
static int half_size = 256*2;

void sonarPrinter(void)
{
  fprintf(stdout, "in sonarPrinter()\n"); fflush(stdout);
  double scale = (double)half_size / (double)sonar.getMaxRange();

  /*
  ArSonarDevice *sd;

  std::list<ArPoseWithTime *>::iterator it;
  std::list<ArPoseWithTime *> *readings;
  ArPose *pose;

  sd = (ArSonarDevice *)robot->findRangeDevice("sonar");
  if (sd != NULL)
  {
    sd->lockDevice();
    readings = sd->getCurrentBuffer();
    if (readings != NULL)
    {
      for (it = readings->begin(); it != readings->end(); ++it)
      {
        pose = (*it);
        //pose->log();
      }
    }
    sd->unlockDevice();
  }
*/
  double range;
  double angle;

  /*
   * example to show how to find closest readings within polar sections
   */
  printf("Closest readings within polar sections:\n");

  double start_angle = -45;
  double end_angle = 45;
  range = sonar.currentReadingPolar(start_angle, end_angle, &angle);
  printf(" front quadrant: %5.0f  ", range);
  //if (range != sonar.getMaxRange())
  if (std::fabs(range - sonar.getMaxRange()) > std::numeric_limits<double>::epsilon())
    printf("%3.0f ", angle);
  printf("\n");
#if defined(VISP_HAVE_X11) || defined (VISP_HAVE_GDI)
  //if (isInitialized && range != sonar.getMaxRange())
  if (isInitialized && std::fabs(range - sonar.getMaxRange()) > std::numeric_limits<double>::epsilon())
  {
    double x = range * cos(vpMath::rad(angle)); // position of the obstacle in the sensor frame
    double y = range * sin(vpMath::rad(angle));

    // Conversion in pixels so that the robot frame is in the middle of the image
    double j = -y * scale + half_size; // obstacle position
    double i = -x * scale + half_size;

    vpDisplay::display(I);
    vpDisplay::displayLine(I, half_size, half_size, 0, 0, vpColor::red, 5);
    vpDisplay::displayLine(I, half_size, half_size, 0, 2*half_size-1, vpColor::red, 5);
    vpDisplay::displayLine(I, half_size, half_size, i, j, vpColor::green, 3);
    vpDisplay::displayCross(I, i, j, 7, vpColor::blue);
  }
#endif

  range = sonar.currentReadingPolar(-135, -45, &angle);
  printf(" right quadrant: %5.0f ", range);
  //if (range != sonar.getMaxRange())
  if (std::fabs(range - sonar.getMaxRange()) > std::numeric_limits<double>::epsilon())
    printf("%3.0f ", angle);
  printf("\n");

  range = sonar.currentReadingPolar(45, 135, &angle);
  printf(" left quadrant: %5.0f ", range);
  //if (range != sonar.getMaxRange())
  if (std::fabs(range - sonar.getMaxRange()) > std::numeric_limits<double>::epsilon())
    printf("%3.0f ", angle);
  printf("\n");

  range = sonar.currentReadingPolar(-135, 135, &angle);
  printf(" back quadrant: %5.0f ", range);
  //if (range != sonar.getMaxRange())
  if (std::fabs(range - sonar.getMaxRange()) > std::numeric_limits<double>::epsilon())
    printf("%3.0f ", angle);
  printf("\n");

  /*
   * example to show how get all sonar sensor data
   */
  ArSensorReading *reading;
  for (int sensor = 0; sensor < robot->getNumSonar(); sensor++)
  {
    reading = robot->getSonarReading(sensor);
    if (reading != NULL)
    {
      angle = reading->getSensorTh();
      range = reading->getRange();
      double sx = reading->getSensorX(); // position of the sensor in the robot frame
      double sy = reading->getSensorY();
      double ox = range * cos(vpMath::rad(angle)); // position of the obstacle in the sensor frame
      double oy = range * sin(vpMath::rad(angle));
      double x = sx + ox; // position of the obstacle in the robot frame
      double y = sy + oy;

      // Conversion in pixels so that the robot frame is in the middle of the image
      double sj = -sy * scale + half_size; // sensor position
      double si = -sx * scale + half_size;
      double j = -y * scale + half_size; // obstacle position
      double i = -x * scale + half_size;

      //      printf("%d x: %.1f y: %.1f th: %.1f d: %d\n", sensor, reading->getSensorX(),
      //             reading->getSensorY(), reading->getSensorTh(), reading->getRange());

#if defined(VISP_HAVE_X11) || defined (VISP_HAVE_GDI)
      //if (isInitialized && range != sonar.getMaxRange())
      if (isInitialized && std::fabs(range - sonar.getMaxRange()) > std::numeric_limits<double>::epsilon())
      {
        vpDisplay::displayLine(I, si, sj, i, j, vpColor::blue, 2);
        vpDisplay::displayCross(I, si, sj, 7, vpColor::blue);
        char legend[15];
        sprintf(legend, "%d: %1.2fm", sensor, float(range)/1000);
        vpDisplay::displayCharString(I, i-7, j+7, legend, vpColor::blue);
      }
#endif
    }

  }

#if defined(VISP_HAVE_X11) || defined (VISP_HAVE_GDI)
  if (isInitialized)
    vpDisplay::flush(I);
#endif

  fflush(stdout);
}

int main(int argc, char **argv)
{
  try {
    ArArgumentParser parser(&argc, argv);
    parser.loadDefaultArguments();

    robot = new vpRobotPioneer;

    // ArRobotConnector connects to the robot, get some initial data from it such as type and name,
    // and then loads parameter files for this robot.
    ArRobotConnector robotConnector(&parser, robot);
    if(!robotConnector.connectRobot())
    {
      ArLog::log(ArLog::Terse, "Could not connect to the robot");
      if(parser.checkHelpAndWarnUnparsed())
      {
        Aria::logOptions();
        Aria::exit(1);
      }
    }
    if (!Aria::parseArgs())
    {
      Aria::logOptions();
      Aria::shutdown();
      return false;
    }

    std::cout << "Robot connected" << std::endl;

#if defined(VISP_HAVE_X11) || defined (VISP_HAVE_GDI)
    // Create a display to show sensor data
    if (isInitialized == false)
    {
      I.resize((unsigned int)half_size*2, (unsigned int)half_size*2);
      I = 255;

#if defined(VISP_HAVE_X11)
      d = new vpDisplayX;
#elif defined (VISP_HAVE_GDI)
      d = new vpDisplayGDI;
#endif
      d->init(I, -1, -1, "Sonar range data");
      isInitialized = true;
    }
#endif

    // Activates the sonar
    ArGlobalFunctor sonarPrinterCB(&sonarPrinter);
    robot->addRangeDevice(&sonar);
    robot->addUserTask("Sonar printer", 50, &sonarPrinterCB);

    robot->useSonar(true); // activates the sonar device usage

    // Robot velocities
    vpColVector v_mes(2);

    for (int i=0; i < 1000; i++)
    {
      double t = vpTime::measureTimeMs();

      v_mes = robot->getVelocity(vpRobot::REFERENCE_FRAME);
      std::cout << "Trans. vel= " << v_mes[0] << " m/s, Rot. vel=" << vpMath::deg(v_mes[1]) << " deg/s" << std::endl;
      v_mes = robot->getVelocity(vpRobot::ARTICULAR_FRAME);
      std::cout << "Left wheel vel= " << v_mes[0] << " m/s, Right wheel vel=" << v_mes[1] << " m/s" << std::endl;
      std::cout << "Battery=" << robot->getBatteryVoltage() << std::endl;

#if defined(VISP_HAVE_X11) || defined (VISP_HAVE_GDI)
      if (isInitialized) {
        // A mouse click to exit
        // Before exiting save the last sonar image
        if (vpDisplay::getClick(I, false) == true) {
          {
            // Set the default output path
            std::string opath;
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
            opath = "/tmp";
#elif defined(_WIN32)
            opath = "C:\\temp";
#endif
            std::string username = vpIoTools::getUserName();

            // Append to the output path string, the login name of the user
            opath = vpIoTools::createFilePath(opath, username);

            // Test if the output path exist. If no try to create it
            if (vpIoTools::checkDirectory(opath) == false) {
              try {
                // Create the dirname
                vpIoTools::makeDirectory(opath);
              }
              catch (...) {
                std::cerr << std::endl
                          << "ERROR:" << std::endl;
                std::cerr << "  Cannot create " << opath << std::endl;
                exit(-1);
              }
            }
            std::string filename = opath + "/sonar.png";
            vpImage<vpRGBa> C;
            vpDisplay::getImage(I, C);
            vpImageIo::write(C, filename);
          }
          break;
        }
      }
#endif

      vpTime::wait(t, 40);
    }

    ArLog::log(ArLog::Normal, "simpleMotionCommands: Stopping.");
    robot->lock();
    robot->stop();
    robot->unlock();
    ArUtil::sleep(1000);

    robot->lock();
    ArLog::log(ArLog::Normal, "simpleMotionCommands: Pose=(%.2f,%.2f,%.2f), Trans. Vel=%.2f, Rot. Vel=%.2f, Battery=%.2fV",
               robot->getX(), robot->getY(), robot->getTh(), robot->getVel(), robot->getRotVel(), robot->getBatteryVoltage());
    robot->unlock();

    std::cout << "Ending robot thread..." << std::endl;
    robot->stopRunning();

#if defined(VISP_HAVE_X11) || defined (VISP_HAVE_GDI)
    if (isInitialized) {
      if (d != NULL)
        delete d;
    }
#endif

    // wait for the thread to stop
    robot->waitForRunExit();

    delete robot;

    // exit
    ArLog::log(ArLog::Normal, "simpleMotionCommands: Exiting.");
    return 0;
  }
  catch(vpException &e) {
    std::cout << "Catch an exception: " << e << std::endl;
    return 1;
  }
}

#endif