sonyPTZDemo.cpp

Example using a joystick to operate a Sony PTZ camera

This is basically just a demo of how to use the sony, but made fancy so you can drive around the robot and look at stuff with the camera. Press down button 1 to drive the robot, button 2 to move the camera, and both buttons to zoom the camera.

#include "Aria.h"


/*
  This class is the core of this demo, it adds itself to the robot given
  as a user task, then drives the robot and camera from the joystick
*/
class Joydrive
{
public:
  // constructor
  Joydrive(ArRobot *robot, int LRAmount = 15, int UDAmount = 10, 
       int zoomAmount = 50);
  // destructor, its just empty
  ~Joydrive(void) {}

  // the callback function
  void drive(void);

  // callbacks for key presses
  void up(void);
  void down(void);
  void left(void);
  void right(void);
  void in(void);
  void out(void);
  void center(void);
protected:
  // the rotational max for the robot
  int myRotValRobot;
  // the translational max for the robot
  int myTransValRobot;
  // the pan max for the camera
  int myPanValCamera;
  // the tilt max for the camera
  int myTiltValCamera;
  // the zoom max for the camera
  int myZoomValCamera;
  
  // joystick handler
  ArJoyHandler myJoyHandler;

  // the camera
  ArSonyPTZ myCam;
  // the robot pointer
  ArRobot *myRobot;
  // callback for the drive function
  ArFunctorC<Joydrive> myDriveCB;
  ArFunctorC<Joydrive> myUpCB;
  ArFunctorC<Joydrive> myDownCB;
  ArFunctorC<Joydrive> myLeftCB;
  ArFunctorC<Joydrive> myRightCB;
  ArFunctorC<Joydrive> myInCB;
  ArFunctorC<Joydrive> myOutCB;
  ArFunctorC<Joydrive> myCenterCB;
  int myLRAmount;
  int myUDAmount;
  int myZoomAmount;
};

/*
  Constructor, sets the robot pointer, and some initial values, also note the
  use of constructor chaining on myCam and myDriveCB.
*/
Joydrive::Joydrive(ArRobot *robot, int LRAmount, int UDAmount, int zoomAmount) :
  myCam(robot),
  myDriveCB(this, &Joydrive::drive),
  myUpCB(this, &Joydrive::up),
  myDownCB(this, &Joydrive::down),
  myLeftCB(this, &Joydrive::left),
  myRightCB(this, &Joydrive::right),
  myInCB(this, &Joydrive::in),
  myOutCB(this, &Joydrive::out),
  myCenterCB(this, &Joydrive::center)
    
{
  // set the robot pointer and add the joydrive as a user task
  myRobot = robot;
  myRobot->addUserTask("joydrive", 50, &myDriveCB);
  



  // initalize some variables
  myRotValRobot = 100;
  myTransValRobot = 700;
  myPanValCamera = 8;
  myTiltValCamera = 3;
  myZoomValCamera = 50;
  myLRAmount = LRAmount;
  myUDAmount = UDAmount;
  myZoomAmount = zoomAmount;

  ArKeyHandler *keyHandler;
  myRobot = robot;
  // see if there is already a keyhandler, if not make one for ourselves
  if ((keyHandler = Aria::getKeyHandler()) == NULL)
  {
    keyHandler = new ArKeyHandler;
    Aria::setKeyHandler(keyHandler);
    myRobot->attachKeyHandler(keyHandler);
  }
  // now that we have one, add our keys as callbacks, print out big
  // warning messages if they fail
  if (!keyHandler->addKeyHandler(ArKeyHandler::UP, &myUpCB))
    ArLog::log(ArLog::Terse, "The key handler already has a key for up, keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler(ArKeyHandler::DOWN, &myDownCB))
    ArLog::log(ArLog::Terse, "The key handler already has a key for down, keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler(ArKeyHandler::LEFT, &myLeftCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for left, keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler(ArKeyHandler::RIGHT, &myRightCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for right, keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler('z', &myInCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for 'z', keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler('Z', &myInCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for 'Z', keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler('x', &myOutCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for 'x', keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler('X', &myOutCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for 'X', keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler('c', &myCenterCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for 'c', keydrive will not work correctly.");
  if (!keyHandler->addKeyHandler('C', &myCenterCB))
    ArLog::log(ArLog::Terse,  
"The key handler already has a key for 'C', keydrive will not work correctly.");


  // initialize the joystick
  myJoyHandler.init();
  // see if we have a joystick, and let the usre know the results
  if (myJoyHandler.haveJoystick())
  {
    printf("Have a joystick\n\n");
  }
  // we don't have a joystic, so get out
  else
  {
    printf("Do not have a joystick, only the keyboard will work.\n");
  }
}

void Joydrive::left(void)
{
  myCam.panTiltRel(-myLRAmount, 0);
}

void Joydrive::right(void)
{
  myCam.panTiltRel(myLRAmount, 0);
}

void Joydrive::up(void)
{
  myCam.panTiltRel(0, myUDAmount);
}

void Joydrive::down(void)
{
  myCam.panTiltRel(0, -myUDAmount);
}

void Joydrive::in(void)
{
  myCam.zoomRel(myZoomAmount);
}

void Joydrive::out(void)
{
  myCam.zoomRel(-myZoomAmount);
}

void Joydrive::center(void)
{
  myCam.panTilt(0,0);
  myCam.zoom(0);
}

void Joydrive::drive(void)
{
  int trans, rot;
  int pan, tilt;
  int zoom, nothing;

  // if both buttons are pushed, zoom the joystick
  if (myJoyHandler.haveJoystick() && myJoyHandler.getButton(1) && 
      myJoyHandler.getButton(2))
  {
    // set its speed so we get desired value range, we only care about y
    myJoyHandler.setSpeeds(0, myZoomValCamera);
    // get the values
    myJoyHandler.getAdjusted(&nothing, &zoom);
    // zoom the camera
    myCam.zoomRel(zoom);
  }
  // if both buttons aren't pushed, see if one button is pushed
  else 
  {
    // if button one is pushed, drive the robot
    if (myJoyHandler.haveJoystick() && myJoyHandler.getButton(1))
    {
      // set the speed on the joystick so we get the values we want
      myJoyHandler.setSpeeds(myRotValRobot, myTransValRobot);
      // get the values
      myJoyHandler.getAdjusted(&rot, &trans);
      // set the robots speed
      myRobot->setVel(trans);
      myRobot->setRotVel(-rot);
    }
    // if button one isn't pushed, stop the robot
    else
    {
      myRobot->setVel(0);
      myRobot->setRotVel(0);
    }
    // if button two is pushed, move the camera
    if (myJoyHandler.haveJoystick() && myJoyHandler.getButton(2))
    {
      // set the speeds on the joystick so we get desired value range
      myJoyHandler.setSpeeds(myPanValCamera, myTiltValCamera);
      // get the values
      myJoyHandler.getAdjusted(&pan, &tilt);
      // drive the camera
      myCam.panTiltRel(pan, tilt);
    } 
  }

}

int main(int argc, char **argv) 
{
  // just some stuff for returns
  std::string str;
  int ret;
  
  // robots connection
  ArSerialConnection con;
  // the robot, this turns state reflection off
  ArRobot robot(NULL, false);
  // the joydrive as defined above, this also adds itself as a user task
  Joydrive joyd(&robot);

  // mandatory init
  Aria::init();

  // open the connection, if it fails, exit
  if ((ret = con.open()) != 0)
  {
    str = con.getOpenMessage(ret);
    printf("Open failed: %s\n", str.c_str());
    Aria::shutdown();
    return 1;
  }

  // set the connection o nthe robot
  robot.setDeviceConnection(&con);
  // connect, if we fail, exit
  if (!robot.blockingConnect())
  {
    printf("Could not connect to robot... exiting\n");
    Aria::shutdown();
    return 1;
  }

  // turn off the sonar, enable the motors, turn off amigobot sounds
  robot.comInt(ArCommands::SONAR, 0);
  robot.comInt(ArCommands::ENABLE, 1);
  robot.comInt(ArCommands::SOUNDTOG, 0);

  // run, if we lose connection to the robot, exit
  robot.run(true);
  
  // shutdown and go away
  Aria::shutdown();
  return 0;
}

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