Re: reset position of the controller using supervisor_field_set

This is my simplify  controller's code :


  static int robot;                   //descriptor del robot
  static float[] posicion_inicial;    //posicion inicial


  public static void main() {

      for (int i =3D 0; i < 10; i++){
            .....
            robot_step(64);
      }
      resetPosition();
  }


  /** Get the beginning position*/
  public static void getBeginningPosition(){
    supervisor_field_get(robot, SUPERVISOR_FIELD_TRANSLATION_Z |
SUPERVISOR_FIELD_TRANSLATION_X, posicion_inicial,64);
  }


  /** Reset the position to the begining position */
  public static void resetPosition(){
    supervisor_field_set(robot, SUPERVISOR_FIELD_TRANSLATION_Z |
SUPERVISOR_FIELD_TRANSLATION_X, posicion_inicial);
  }



how I can do it in webots?




2006/5/24, fernando alonso <[email protected]>:
> I just want to reset the position of my robot, but I don't want to
> receive the real position in it.
> Instead of that, I only want to use the normal controls of the robot
> to place my robot in a determinate coordinate.
>
> I am implementing "Swarm Intelligence" algorithm to learn how to move
> within the labyrinth and it's necessary that
> the "fitness" function leaves the position of the robot in the same
> place in which it was before its execution.
> That is the reason why I need resetting the position of the robot in
> the robot controller and .
>
> What I don't understand is why I must use the supervisor and if I only
> want to move my robot with its
> controller, I would not need sending anything from the emitter. In
> addition to this I want to reset the position when
> I need it not when the supervisor would think it is the time for that.
>
> 2006/5/24, fernando alonso <[email protected]>:
> > Sorry, me English es very poor:
> >
> > I want reset the position of the my robot, I wan't receiver
> > information in my robot. I only want put my robot in a place when need
> > it. I want the code for put my robot in a coordenades when the normal
> > controller need it.
> >
> > I want apply Swarm Intelligence for learning to move for the laberint
> > and I need use fitness funtion that each execute reset the position
> > the robot for can evaluate the fitness of the movement. I don't
> > understand why I have to use the supervisor.
> >
> > 2006/5/24, Olivier Michel <[email protected]>:
> > > Hello,
> > >
> > > The "stand me up" trick won't work with Webots 5.1.6 as it was not
> > > implemented in the roboka world.
> > > However, I just ported it from the previous contest and integrated it
> > > into Webots 5.1.7 which I just released now. So, rush to download Web=
ots
> > > 5.1.7 and you will see in the source code of the Roboka0.java control=
ler
> > > how to set the robot at any position in the maze (this is done when
> > > pressing the Esc key, but you can do it programmatically as well). Of
> > > course this feature will be disabled in the contest matches (real rob=
ots
> > > can't fly that way), but I believe it is very useful for developing
> > > robot controllers.
> > >
> > > Moreover, as requested by several people, I added new sample roboka
> > > worlds called roboka0.wbt, roboka1.wbt, roboka2.wbt and roboka3.wbt
> > > which offer different maze configurations.
> > >
> > > Cheers,
> > >
> > > -Olivier
> > >
> > > L=E1szl=F3 M=E1rton wrote:
> > > > Hello,
> > > >
> > > > In last two robojudo conets I used for training
> > > > pruposes a different robot like the one from contest.
> > > >
> > > > It was capable to reset himself if it was necessary.
> > > > I don't know if it works with the new controlers but
> > > > it  worths a try.
> > > >
> > > > The code looks like that:
> > > >
> > > > //first declare the desired coordinates and position
> > > >
> > > > //String message=3D"stand me up 0 0 1 0";
> > > > String message=3D"stand me up 0 0 0.5f 3.14f";
> > > > //String message=3D"stand me up 0";
> > > > // the figures here mean the following:
> > > > // 0: robot =3D Judoka0 1: robot =3D Judoka1
> > > > // 0.5 the X position of the robot
> > > > // 0.5 the Z position of the robot
> > > > // 0 the orientation of the robot (radians)
> > > > // It is also possible to simply pass "stand me up 0"
> > > > // the supervisor will then use the last initial
> > > > position
> > > >
> > > > byte [] msg=3Dnull;
> > > > try
> > > > { // convert the String into bytes using the
> > > >   // ISO-8859-1 encoding
> > > >   msg=3Dmessage.getBytes("ISO-8859-1");
> > > > } catch(Exception e) {}
> > > >
> > > >
> > > >
> > > > //then when you want to reset the robot position call
> > > >  emitter_send(emitter,msg.length,msg);
> > > >
> > > > Best regards
> > > > M=E1rton L=E1szl=F3
> > > >
> > > >
> > > >> fernando alonso wrote:
> > > >> Hello, i need some help:
> > > >>
> > > >> I'm not able to put my bot in a determinate
> > > >>
> > > > position. I want to
> > > >
> > > >> execute  my controller and finally put my bot
> > > >>
> > > > again at the beginning,
> > > >
> > > >> but Webot doesn't work as I want. I'd very much
> > > >>
> > > > like to know how to do
> > > >
> > > >> it!!
> > > >>
> > > >> I send you the Controller and the World.
> > > >>
> > > >>
> > > >
> > > >
> > > > __________________________________________________
> > > > Do You Yahoo!?
> > > > Tired of spam?  Yahoo! Mail has the best spam protection around
> > > > http://mail.yahoo.com
> > > >
> > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Fernando Alonso Mart=EDn
> > NIA: 100033362
> >
>
>
> --
> Fernando Alonso Mart=EDn
> NIA: 100033362
>


--=20
Fernando Alonso Mart=EDn
NIA: 100033362


------------------------ Yahoo! Groups Sponsor --------------------~-->=20
Everything you need is one=A0click away.=A0 Make Yahoo! your home page=A0no=
w.
http://us.click.yahoo.com/AHchtC/4FxNAA/yQLSAA/pU_rlB/TM
--------------------------------------------------------------------~->=20

=20
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/webots-contest/

<*> To unsubscribe from this group, send an email to:
    [email protected]

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/
=20