Nabble - Robocode

Re: simple wall avoidance

2008-10-06T16:04:00Z

> // when we get closer to a wall than "double wall_avoid_distance"
> change direction and go back
> private double avoidWalls() {
>
> double wall_avoid_distance = 60;
> double fieldHeight = getBattleFieldHeight();
> double fieldWidth = getBattleFieldWidth();
> double centerX = (fieldWidth / 2);
> double centerY = (fieldHeight / 2);
> double currentHeading = getHeading();
> double x = getX();
> double y = getY();
> if (x < wall_avoid_distance || x > fieldWidth -
> wall_avoid_distance) {
> moveDirection *= -1;
> }
> if (y < wall_avoid_distance || y > fieldHeight -
> wall_avoid_distance) {
> moveDirection *= -1;
> }
> return moveDirection;
> }

One problem I can see with that is that if you are approaching a
corner you will reverse direction twice and end up carrying on in the
same direction. The second "if" should be an "else if". Other than
that, it looks like your method should work fairly well in most
situations (I assume you are initialising moveDirection to 1
somewhere). You would be better off taking the direction of travel
into account, though. If you're really close to the wall but moving
roughly parallel to it, there is no need to change direction (while
changing direction you're roughly stationary which makes you easier to
hit by head on targetting, which I guess most of your opponents are
using).

Res: simple wall avoidance

2008-10-06T13:24:23Z

I resolve my problem creating a method goToPoint(x,y). In this method the values of 'x' and 'y' are limited to borders of the arena (minus the radius of the robot). Try this.... you sure will learn more...

Sorry for my english.

/\ A vida, nada mais é que uma enorme montanha russa! /\
\/ Só nos resta aproveitar! \/
Flw, Mumak Gnod

----- Mensagem original ----
De: Julian Kent <jkflying@...>
Para: Robocode@...
Enviadas: Quinta-feira, 2 de Outubro de 2008 11:01:48
Assunto: Re: [Robocode] simple wall avoidance

I'm not sure what's wrong with your code, but there are better ways of
avoiding walls than simply reversing. For example, you can test 3 points
in front of you, one straight, one to the left, one to the right, and
see which ones are inside the field. If the one straight ahead is in the
field keep going straight, otherwise try the one on the right, if that's
in the field turn right, otherwise turn left. There is also a method
called "wall smoothing" where you see how far you would have to 'rotate'
this point straight in front of you towards the enemy in order for it to
be inside the field. A good value for the distance of the point is 160.

Good luck with the project,
Julian (AKA Skilgannon on RoboWiki)

On Thu, 02 Oct 2008 08:21:28 -0000, "aatomik" <aatomik@hotmail. com>
said:

> Hi, I'm relatively new to java and robocode as well, but slowly I am
> getting the hang of it. At the moment I'm building a robot to
> participate in our school competition, and it is evolving quite nicely.
> It shoots the enemy using head on targeting and moves around it in a
> circular way. The problem that I have now is that it collides with the
> walls all the time and I'm trying to find some kind of solution to
> solve it.
> I came to an idea to calculate my x,y position and compare it to a
> double wall_avoid_distance . At any point when my tank is closer to the
> wall than wall_avoid_distance it should change it's direction.
> Well, I put in code and it chages the direction with one major problem
> - it collides with the wall and only after that it seems to
> understand that it's time to go the other way. Maybe someone here can
> tell me, what am I doing wrong here.
> This is a part of my code:
>
> public void onScannedRobot( ScannedRobotEven t event) {
> // move around enemy tank in a circular way
> setTurnRight( event.getBearing () + 90);
> setAhead(100 * avoidWalls() );
> double vastase_peilung = event.getBearing( );
> double tuki_suund = getGunHeading( );
> double minu_suund = getHeading() ;
> // this is for shooting and calculating enemy position
> double vastase_suund = minu_suund + vastase_peilung;
> double keeramisnurk = vastase_suund - tuki_suund;
> keeramisnurk = normalRelativeAngle (keeramisnurk) ;
>
> turnGunRight( keeramisnurk) ;
>
> setFire(3);
> execute();
> }
>
> public void onHitWall(HitWallEv ent event) {
> out.println( "Ouch, I hit a wall bearing " + event.getBearing( )
> + " degrees.");
> }
>
> // when we get closer to a wall than "double wall_avoid_distance "
> change direction and go back
> private double avoidWalls() {
>
> double wall_avoid_distance = 60;
> double fieldHeight = getBattleFieldHeigh t();
> double fieldWidth = getBattleFieldWidth ();
> double centerX = (fieldWidth / 2);
> double centerY = (fieldHeight / 2);
> double currentHeading = getHeading() ;
> double x = getX();
> double y = getY();
> if (x < wall_avoid_distance || x > fieldWidth -
> wall_avoid_distance ) {
> moveDirection *= -1;
> }
> if (y < wall_avoid_distance || y > fieldHeight -
> wall_avoid_distance ) {
> moveDirection *= -1;
> }
> return moveDirection;
> }
>
>
> ------------ --------- --------- ------
>
> Yahoo! Groups Links
>
>
>

--
Julian Kent
jkflying@fastmail. net

--
http://www.fastmail .fm - The way an email service should be

Novos endereços, o Yahoo! que você conhece. Crie um email novo com a sua cara @ymail.com ou @rocketmail.com.
http://br.new.mail.yahoo.com/addresses

how to setup javac compiler for robocode in windows?

2008-10-06T03:38:54Z

I succeed to install robocode .But when I try to open the compiler.Below message appear :

Please wait while Robocode sets up a compiler for you...
Setting up compiler for Windows XP
Java home is C:\Program Files\Java\jre1.6.0_07
Testing compile with javac...
javac does not exist.

And when i try to compile,command prompt show:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at javax.swing.ImageIcon.<init>(Unknown Source)
at sun.swing.WindowsPlacesBar.<init>(Unknow... Source)
at com.sun.java.swing.plaf.windows.WindowsF...
lder(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsF...
s(Unknown Source)
at javax.swing.plaf.basic.BasicFileChooserU... Source)
at com.sun.java.swing.plaf.windows.WindowsF...
n Source)
at javax.swing.JComponent.setUI(Unknown Source)
at javax.swing.JFileChooser.updateUI(Unknow... Source)
at javax.swing.JFileChooser.setup(Unknown Source)
at javax.swing.JFileChooser.<init>(Unknown Source)
at javax.swing.JFileChooser.<init>(Unknown Source)
at robocode.editor.EditWindow.fileSaveAs(Un... Source)
at robocode.editor.EditWindow.fileSave(Unkn... Source)
at robocode.editor.EditWindow.fileSave(Unkn... Source)
at robocode.editor.RobocodeEditor.saveRobot... Source)
at robocode.editor.RobocodeEditorMenuBar.fi...
Source)v

please somebody help me

[Robo Code 1 on 1 strategy]

2008-10-02T22:11:47Z

Anyone have the idea on 1 on 1 strategy?

For the attack, Defence & lastly scanning part.

Re: simple wall avoidance

2008-10-02T07:01:48Z

I'm not sure what's wrong with your code, but there are better ways of
avoiding walls than simply reversing. For example, you can test 3 points
in front of you, one straight, one to the left, one to the right, and
see which ones are inside the field. If the one straight ahead is in the
field keep going straight, otherwise try the one on the right, if that's
in the field turn right, otherwise turn left. There is also a method
called "wall smoothing" where you see how far you would have to 'rotate'
this point straight in front of you towards the enemy in order for it to
be inside the field. A good value for the distance of the point is 160.

Good luck with the project,
Julian (AKA Skilgannon on RoboWiki)

On Thu, 02 Oct 2008 08:21:28 -0000, "aatomik" <aatomik@...>
said:

> Hi, I'm relatively new to java and robocode as well, but slowly I am
> getting the hang of it. At the moment I'm building a robot to
> participate in our school competition, and it is evolving quite nicely.
> It shoots the enemy using head on targeting and moves around it in a
> circular way. The problem that I have now is that it collides with the
> walls all the time and I'm trying to find some kind of solution to
> solve it.
> I came to an idea to calculate my x,y position and compare it to a
> double wall_avoid_distance. At any point when my tank is closer to the
> wall than wall_avoid_distance it should change it's direction.
> Well, I put in code and it chages the direction with one major problem
> - it collides with the wall and only after that it seems to
> understand that it's time to go the other way. Maybe someone here can
> tell me, what am I doing wrong here.
> This is a part of my code:
>
> public void onScannedRobot(ScannedRobotEvent event) {
> // move around enemy tank in a circular way
> setTurnRight(event.getBearing() + 90);
> setAhead(100 * avoidWalls());
> double vastase_peilung = event.getBearing();
> double tuki_suund = getGunHeading();
> double minu_suund = getHeading();
> // this is for shooting and calculating enemy position
> double vastase_suund = minu_suund + vastase_peilung;
> double keeramisnurk = vastase_suund - tuki_suund;
> keeramisnurk = normalRelativeAngle(keeramisnurk);
>
> turnGunRight(keeramisnurk);
>
> setFire(3);
> execute();
> }
>
> public void onHitWall(HitWallEvent event) {
> out.println("Ouch, I hit a wall bearing " + event.getBearing()
> + " degrees.");
> }
>
> // when we get closer to a wall than "double wall_avoid_distance"
> change direction and go back
> private double avoidWalls() {
>
> double wall_avoid_distance = 60;
> double fieldHeight = getBattleFieldHeight();
> double fieldWidth = getBattleFieldWidth();
> double centerX = (fieldWidth / 2);
> double centerY = (fieldHeight / 2);
> double currentHeading = getHeading();
> double x = getX();
> double y = getY();
> if (x < wall_avoid_distance || x > fieldWidth -
> wall_avoid_distance) {
> moveDirection *= -1;
> }
> if (y < wall_avoid_distance || y > fieldHeight -
> wall_avoid_distance) {
> moveDirection *= -1;
> }
> return moveDirection;
> }
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

--
Julian Kent
jkflying@...

--
http://www.fastmail.fm - The way an email service should be

simple wall avoidance

2008-10-02T01:21:28Z

Hi, I'm relatively new to java and robocode as well, but slowly I am
getting the hang of it. At the moment I'm building a robot to
participate in our school competition, and it is evolving quite nicely.
It shoots the enemy using head on targeting and moves around it in a
circular way. The problem that I have now is that it collides with the
walls all the time and I'm trying to find some kind of solution to
solve it.
I came to an idea to calculate my x,y position and compare it to a
double wall_avoid_distance. At any point when my tank is closer to the
wall than wall_avoid_distance it should change it's direction.
Well, I put in code and it chages the direction with one major problem
- it collides with the wall and only after that it seems to
understand that it's time to go the other way. Maybe someone here can
tell me, what am I doing wrong here.
This is a part of my code:

public void onScannedRobot(ScannedRobotEvent event) {
// move around enemy tank in a circular way
setTurnRight(event.getBearing() + 90);
setAhead(100 * avoidWalls());
double vastase_peilung = event.getBearing();
double tuki_suund = getGunHeading();
double minu_suund = getHeading();
// this is for shooting and calculating enemy position
double vastase_suund = minu_suund + vastase_peilung;
double keeramisnurk = vastase_suund - tuki_suund;
keeramisnurk = normalRelativeAngle(keeramisnurk);

turnGunRight(keeramisnurk);

setFire(3);
execute();
}

public void onHitWall(HitWallEvent event) {
out.println("Ouch, I hit a wall bearing " + event.getBearing()
+ " degrees.");
}

// when we get closer to a wall than "double wall_avoid_distance"
change direction and go back
private double avoidWalls() {

double wall_avoid_distance = 60;
double fieldHeight = getBattleFieldHeight();
double fieldWidth = getBattleFieldWidth();
double centerX = (fieldWidth / 2);
double centerY = (fieldHeight / 2);
double currentHeading = getHeading();
double x = getX();
double y = getY();
if (x < wall_avoid_distance || x > fieldWidth -
wall_avoid_distance) {
moveDirection *= -1;
}
if (y < wall_avoid_distance || y > fieldHeight -
wall_avoid_distance) {
moveDirection *= -1;
}
return moveDirection;
}

Re: IllegalStateException using other libraries

2008-09-24T22:04:40Z

Thanks so much! That is exactly what I needed. :) Now that you mention
it, I remember reading that somewhere in the documentation, I think,
but had forgotten it.

Thanks for your help,
Rebecca

--- In Robocode@..., "flemmingnlarsen"
<flemming.n.larsen@...> wrote:

>
> Hi Rebecca,
>
> It can be quite hard to tell exactly what is wrong without knowing the
> exact configuration. However "Disabled" could mean that your robot(s)
> get a SecurityException when you try to mix the two projects. That's a
> common problem. You could try to add -DNOSECURITY=true right after the
> -Dsun.io.useCanonCaches=false in the robocode.bat/sh file, or in your
> "VM Arguments" under "Run Configurations.." in Eclipse. Normally these
> are:
>
> -Xmx512M -Dsun.io.useCanonCaches=false
>
> You should set them to:
>
> -Xmx512M -Dsun.io.useCanonCaches=false -DNOSECURITY=true
>
> I am not sure if this will work, but at least that is worth a try.
>
> Best regards,
> - Flemming
>
> --- In Robocode@..., "Rebecca" <beckster_rees@> wrote:
> >
> > Hi all,
> >
> > I'm new to robocode, trying to use it for an art project of all
> > things. I've got the source downloaded and a project set up in
> > eclipse, as I want to interface with another project. Everything
> > compiles fine, I get both projects starting up when I try to run.
> > However, I want my robot to reference the outside project, and that's
> > where things are falling apart for me. The robot either doesn't load
> > (sits there saying "Disabled"), or it doesn't load and I get an
> > IllegalStateException -- it depends upon where I tried putting the
> > libraries (in the robots directory, or in the main project directory).
> > I'm not sure what else to try. Both projects are in Java, so I was
> > hoping to make use of that instead of having to resort to
> > reading/writing a file to communicate between projects. Any ideas?
> >
> > Thanks,
> > Rebecca
> >
>

Re: IllegalStateException using other libraries

2008-09-23T14:46:15Z

Hi Rebecca,

It can be quite hard to tell exactly what is wrong without knowing the
exact configuration. However "Disabled" could mean that your robot(s)
get a SecurityException when you try to mix the two projects. That's a
common problem. You could try to add -DNOSECURITY=true right after the
-Dsun.io.useCanonCaches=false in the robocode.bat/sh file, or in your
"VM Arguments" under "Run Configurations.." in Eclipse. Normally these
are:

-Xmx512M -Dsun.io.useCanonCaches=false

You should set them to:

-Xmx512M -Dsun.io.useCanonCaches=false -DNOSECURITY=true

I am not sure if this will work, but at least that is worth a try.

Best regards,
- Flemming

--- In Robocode@..., "Rebecca" <beckster_rees@...> wrote:

>
> Hi all,
>
> I'm new to robocode, trying to use it for an art project of all
> things. I've got the source downloaded and a project set up in
> eclipse, as I want to interface with another project. Everything
> compiles fine, I get both projects starting up when I try to run.
> However, I want my robot to reference the outside project, and that's
> where things are falling apart for me. The robot either doesn't load
> (sits there saying "Disabled"), or it doesn't load and I get an
> IllegalStateException -- it depends upon where I tried putting the
> libraries (in the robots directory, or in the main project directory).
> I'm not sure what else to try. Both projects are in Java, so I was
> hoping to make use of that instead of having to resort to
> reading/writing a file to communicate between projects. Any ideas?
>
> Thanks,
> Rebecca
>

IllegalStateException using other libraries

2008-09-22T22:25:37Z

Hi all,

I'm new to robocode, trying to use it for an art project of all
things. I've got the source downloaded and a project set up in
eclipse, as I want to interface with another project. Everything
compiles fine, I get both projects starting up when I try to run.
However, I want my robot to reference the outside project, and that's
where things are falling apart for me. The robot either doesn't load
(sits there saying "Disabled"), or it doesn't load and I get an
IllegalStateException -- it depends upon where I tried putting the
libraries (in the robots directory, or in the main project directory).
I'm not sure what else to try. Both projects are in Java, so I was
hoping to make use of that instead of having to resort to
reading/writing a file to communicate between projects. Any ideas?

Thanks,
Rebecca

Re: mainclass

2008-08-15T14:05:13Z

Hi Noah,

Sorry for the late answer. I have been very busy lately.

Do you know these pages from the new Wiki for Robocode?:

http://testwiki.roborumble.org/w/index.php?title=Robocode/Eclipse

Here I wrote all details about how to develop robots using the
Eclipse editor.

Perhaps you are trying to run the game itself from Eclipse? If that's
the case, you should read the Developers Guide for building Robocodde:

http://sourceforge.net/docman/display_doc.php?
docid=33696&group_id=37202

I don't know if this help. If not, don't hesitate with writing
again. ;-)

- - -
Btw. You did not insult me with the "designer" quip. :-)

Regards,
- Flemming

--- In Robocode@..., Noah Holland-Moritz <gadgethm@...>
wrote:
>
> When I try to run Robocode from Eclipse, it says "Could not find
the
> main class. Program will exit."
> I looked up the version info and it said that the main class has
been
> refactored.
> That was when I wrote the email.
>
> -Noah
> P.S. If I insulted you with the "designer" quip, I apologize.
>
> flemmingnlarsen wrote:
> >
> > The main class is robocode.Robocode. It might have been changed,
but
> > it works as usual.
> >
> > What is the problem you see?
> >
> > Best regards,
> > - Flemming N. Larsen
> >
> > --- In Robocode@... <mailto:Robocode%
40yahoogroups.com>,

> > Noah Holland-Moritz <gadgethm@>
> > wrote:
> > >
> > > hi, im looking for the new version (1.6.1. beta) main class. the
> > > designers seemed to have changed it. can anyone help me?
> > >
> > > thanks
> > > -Noah Holland
> > >
> >
> >
>

Re: Re: mainclass

2008-08-14T11:42:21Z

When I try to run Robocode from Eclipse, it says "Could not find the
main class. Program will exit."
I looked up the version info and it said that the main class has been
refactored.
That was when I wrote the email.

-Noah
P.S. If I insulted you with the "designer" quip, I apologize.

flemmingnlarsen wrote:

>
> The main class is robocode.Robocode. It might have been changed, but
> it works as usual.
>
> What is the problem you see?
>
> Best regards,
> - Flemming N. Larsen
>
> --- In Robocode@... <mailto:Robocode%40yahoogroups.com>,
> Noah Holland-Moritz <gadgethm@...>
> wrote:
> >
> > hi, im looking for the new version (1.6.1. beta) main class. the
> > designers seemed to have changed it. can anyone help me?
> >
> > thanks
> > -Noah Holland
> >
>
>

Re: mainclass

2008-08-14T00:06:45Z

The main class is robocode.Robocode. It might have been changed, but
it works as usual.

What is the problem you see?

Best regards,
- Flemming N. Larsen

--- In Robocode@..., Noah Holland-Moritz <gadgethm@...>
wrote:
>
> hi, im looking for the new version (1.6.1. beta) main class. the
> designers seemed to have changed it. can anyone help me?
>
> thanks
> -Noah Holland
>

mainclass

2008-08-13T21:08:25Z

hi, im looking for the new version (1.6.1. beta) main class. the
designers seemed to have changed it. can anyone help me?

thanks
-Noah Holland

Re: BasicSurfer

2008-07-29T08:42:52Z

Looked at RandomMovementBot?

/PEZ

On Mon, Jul 28, 2008 at 3:13 PM, slak96 <dcieslak@...> wrote:

> I'm trying to understand Wave Surfing and Wall Smoothing, looking
> at BasicSurfer. I find it still runs into walls; is there a better
> way to Wall Smooth than what's in there?
>
> Thanks,
> Dan
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>

BasicSurfer

2008-07-28T06:13:20Z

I'm trying to understand Wave Surfing and Wall Smoothing, looking
at BasicSurfer. I find it still runs into walls; is there a better
way to Wall Smooth than what's in there?

Thanks,
Dan

Re: About roborumble

2008-07-11T14:02:53Z

Don't be hard on yourself. I got the same problem once upon a time when
I learned about RoboRumble@Home. ;-)

- Flemming

--- In Robocode@..., "robarrobocode" <robarrobocode@...>
wrote:
>
> --- In Robocode@..., "robarrobocode" <robarrobocode@>
> wrote:
> >
> > Hi, at last I managed to make a competitive bot and I'd like to
enter
> > the roborumble competition, but I don't know, how to add my robot to
> > the participant list.In its homepage I found the appropriate page,
but
> > I don't know how to add it to the list.
> > (I've uploaded it to the repository)
> > waiting for you answers: robar
> >
> Oh, thanks, I'm so stupid :P I've never edited a wiki page before so I
> hadn't got any idea, but now I'm smarter than I was, so thanks ;)
>

Re: Failed to load Main-Class manifest attributes from...

2008-07-11T14:01:27Z

Hi Edwin,

I am happy to hear that you found the root cause of the problem. [:)]

Normally the .jar files are turned into .zip packages as a fallback.
This is controlled by the web-server you download the .jar file from. If
the server configuration does not contain the JAR MIME type, then the
.jar file will per default be turned into a .zip file. This is a classic
problem. But of course you can easily solve it by renaming the file
extension from .zip into .jar. You could also use another mirror server,
when downloading Robocode.

Now, the second part of the problem seems to be the Java installation
installation itself, if it is not able to start the Robocode installer
when you double-click the robocode-setup.jar file. Again, this is a
somewhat classic problem. If Java is installed properly, and you
double-click on the .jar file (robocode-setup.jar file), then Java is
automatically launched. The Java VM will look into the
/META-INF/Manifest.mf file in the .jar file, where it will find
robocode.AutoExtract as the main application class, which is then
launched and hence starts installing Robocode. (It will ask you where to
install Robocode).

It seems like your Java installation does not do this, and normally this
is due to a bad installation. Your Tech guys should follow the
guidelines provided by Sun (if you use Sun's JRE or JDK) to make sure
that Java is correctly installed throughout the network. These are
provided here:

http://java.sun.com/javase/6/webnotes/install/index.html
<http://java.sun.com/javase/6/webnotes/install/index.html>

It is not enough "just" to install Java in order to let it run properly.
At least not always, that is.

Best regards,

- Flemming

--- In Robocode@..., "Edwin Pilobello" <e_pilobello@...>
wrote:

>
> Another of our IT Techs was installing robocode on laptops and got
> the "Failed to load Main-Class". He reports that the way to solve this
> issue is thusly:
>
> 1. After downloading from sourceforge, rename the downloaded robocode-
> setup-1.6.0.1 file and change .zip extension to .jar
> 2. Click on the new .jar file to install robocode
>
> The download process does say that the source is a .jar. However, upon
> saving, it turns into a .zip Double clicking the .zip in Windows XP
> unpackages using .zip format. Clicking on the resulting "extract" file
> to load robocode will produce the "Failed to load Main-Class" error.
>
> So the question is why the original jar file changed to .zip?
>
> --- In Robocode@..., "flemmingnlarsen"
> flemming.n.larsen@ wrote:
> >
> > I am sorry about that, but very happy to hear that the problem is
> > solved now. :-)
> >
> > --- In Robocode@..., "Edwin Pilobello" <e_pilobello@>
> > wrote:
> > >
> > > The IT techs here at PSU figured it out. I'm told it was a corrupt
> > > Robocode extract file. I'll be able to use robocode on the next
> > > class.
> > >
> > > Now all I need to do is get it up on my home computer.
> > >
> > >
>

Re: Failed to load Main-Class manifest attributes from...

2008-07-10T11:41:08Z

Another of our IT Techs was installing robocode on laptops and got
the "Failed to load Main-Class". He reports that the way to solve this
issue is thusly:

1. After downloading from sourceforge, rename the downloaded robocode-
setup-1.6.0.1 file and change .zip extension to .jar
2. Click on the new .jar file to install robocode

The download process does say that the source is a .jar. However, upon
saving, it turns into a .zip Double clicking the .zip in Windows XP
unpackages using .zip format. Clicking on the resulting "extract" file
to load robocode will produce the "Failed to load Main-Class" error.

So the question is why the original jar file changed to .zip?

--- In Robocode@..., "flemmingnlarsen"
<flemming.n.larsen@...> wrote:

>
> I am sorry about that, but very happy to hear that the problem is
> solved now. :-)
>
> --- In Robocode@..., "Edwin Pilobello" <e_pilobello@>
> wrote:
> >
> > The IT techs here at PSU figured it out. I'm told it was a corrupt
> > Robocode extract file. I'll be able to use robocode on the next
> > class.
> >
> > Now all I need to do is get it up on my home computer.
> >
> >

Re: About roborumble

2008-07-10T10:22:38Z

--- In Robocode@..., "robarrobocode" <robarrobocode@...>
wrote:
>
> Hi, at last I managed to make a competitive bot and I'd like to enter
> the roborumble competition, but I don't know, how to add my robot to
> the participant list.In its homepage I found the appropriate page, but
> I don't know how to add it to the list.
> (I've uploaded it to the repository)
> waiting for you answers: robar
>
Oh, thanks, I'm so stupid :P I've never edited a wiki page before so I
hadn't got any idea, but now I'm smarter than I was, so thanks ;)

Re: About roborumble

2008-07-09T13:36:08Z

2008/7/9 robarrobocode <robarrobocode@...>:
> Hi, at last I managed to make a competitive bot and I'd like to enter
> the roborumble competition, but I don't know, how to add my robot to
> the participant list.In its homepage I found the appropriate page, but
> I don't know how to add it to the list.
> (I've uploaded it to the repository)
> waiting for you answers: robar

Just click the Edit Text of this Page link at the bottom and add your
bot in the right place.

About roborumble

2008-07-09T12:49:21Z

Hi, at last I managed to make a competitive bot and I'd like to enter
the roborumble competition, but I don't know, how to add my robot to
the participant list.In its homepage I found the appropriate page, but
I don't know how to add it to the list.
(I've uploaded it to the repository)
waiting for you answers: robar

Re: extend robot.... overwrite fire()?

2008-07-05T14:45:25Z

[snip]
> i'm relatively new to both java and robocode.
> when i build a robot i extend one of JuniorRobot, Robot or
> AdvancedRobot. Then i overwrite the run() method to run my own code.
>
> but can i write a robot with some basic behavior and extend that
> instead of robot?

Yes, a lot of robots are developed that way. You could make your own
robot based on e.g. the AdvancedRobot, and then create your own base
class on top on this, e.g. one that has a good scanning strategy.
Next you could extend this one for making variants or complete robots.

With Robocode 1.6.0 and newer versions, you can also create your own
robot class bases on the core robocode.robotinterfaces backage, which
is a more "raw" way to create new robot classes. The JuniorRobot,
Robot, AdvancedRobot, TeamRobot are all based on these interfaces, so
you could make your own robot type if you want to, but it still has
to follow the common rules and limitations provided with the robot
interfaces.

> and can i overwrite methods like fire() or ahead()?

Yes, but you must call super's methods first. Otherwise it will not
work. E.g.

public void fire(double power) {
if (someCondition) {
power = 1;
}
super.fire(power);
}

I do not recommend overriding the API methods. It makes it hard to
tell what is going on inside your robot. I think it better that you
make your own methods like:

public void doFire(double power) {
if (someCondition) {
power = 1;
}
fire(power);
}

> if so, can i copy the source code from the robot class and edit it?
> imagin a fire() method that does not check for gun heat and does
not
> decreas my life... rapidfire robot!

You can make your own Robot class by copying the source from the
Robot class. As I mentioned, this is using the
robocode.robotinterfaces:

http://robocode.sourceforge.net/docs/robocode/robocode/robotinterfaces
/package-summary.html

For example, you could implement your own robot type that is
inherited from robocode.robotinterfaces.IBasicRobot, and then use the
getPeer(), which will return a
robocode.robotinterfaces.peer.IBasicRobotPeer which you can use for
telling your robot what to do, and also read out data etc. The Robot
class does this.

But it still has to obey the rules in Robocode, and this is protected
by the peers (the ones in robocode.robotinterfaces.peer).

- Flemming

Re: paint on robocode map?

2008-07-05T14:24:03Z

{snip]
> so if I want to package my bot for export I have to comment the method
> or the bot will crash on previously version, right?
> thanks jkflying and flemmingnlarsen for your answer

Yes, you cannot use the getGraphics() with older versions of Robocode,
and thus have to comment the method out, or do something like this:

final static boolean ENABLE_GRAPHICS = true;

...
public void onScannedRobot(ScannedRobotEvent e) {
if (ENABLE_GRAPHICS) {
getGraphics().setColor(Color.RED);
...
}
}

.. and then set the flag to false before you package your robot. This
way you don't have to worry about all the places where you call
getGraphics() as long as you make the check against ENABLE_GRAPHICS
first. :-)

- Flemming

Re: extend robot.... overwrite fire()?

2008-07-05T14:03:57Z

pepijndevos wrote:
> hi,
>
> i'm relatively new to both java and robocode.
> when i build a robot i extend one of JuniorRobot, Robot or
> AdvancedRobot.
>
You can also extend Droid or TeamRobot.
> then i overwrite the run() method to run my own code.
>
The correct term is override. =) However, most bots have a lot of code
in the event handlers, which you also override.
> but can i write a robot with some basic behavior and extend that
> instead of robot?
>
No, you cannot. Robocode will only recognize bots that are extended, and
thus linked in, with its internals. If you copied the code from the
robot class none of your methods like getX(), getGunHeading(), etc would
work because they would not receive the correct updates from the
Robocode engine.
> and can i overwrite methods like fire() or ahead()?
> if so, can i copy the source code from the robot class and edit it?
> imagin a fire() method that does not check for gun heat and does not
> decreas my life... rapidfire robot
Well, you could, but it would prevent the calls from reaching the parent
class, so nothing would actually happen.

Take a look at Robowiki.net for a bunch of ideas and code snippets.

Julian (aka Skilgannon)

extend robot.... overwrite fire()?

2008-07-05T11:46:42Z

hi,

i'm relatively new to both java and robocode.
when i build a robot i extend one of JuniorRobot, Robot or
AdvancedRobot.
then i overwrite the run() method to run my own code.

but can i write a robot with some basic behavior and extend that
instead of robot?
and can i overwrite methods like fire() or ahead()?
if so, can i copy the source code from the robot class and edit it?
imagin a fire() method that does not check for gun heat and does not
decreas my life... rapidfire robot!

bye!
pepijn

Re: paint on robocode map?

2008-07-05T04:55:02Z

--- In Robocode@..., "flemmingnlarsen"
<flemming.n.larsen@...> wrote:
>
>
> Please notice that the new getGraphics() method is only available in
> Robocode 1.6.1, which has been release as a Beta some days ago. :-)
>
> - Flemming
>

so if I want to package my bot for export I have to comment the method
or the bot will crash on previously version, right?
thanks jkflying and flemmingnlarsen for your answer

Re: paint on robocode map?

2008-07-04T12:07:42Z

--- In Robocode@..., "asdasddsa321" <asdasddsa321@...>
wrote:
>
> solved:
>
> 1: enable the button "paint" on your robot console <<< always to do!
>
> 2: in your robot you can get the Grapics2D calling the method
> "getGraphics()" of Robot class, and then paint with this.
>
> 2b: you can also use the method "onPaint(Graphics2D)" of the Robot
class.

Please notice that the new getGraphics() method is only available in
Robocode 1.6.1, which has been release as a Beta some days ago. :-)

- Flemming

Re: paint on robocode map?

2008-07-04T11:03:23Z

solved:

1: enable the button "paint" on your robot console <<< always to do!

2: in your robot you can get the Grapics2D calling the method
"getGraphics()" of Robot class, and then paint with this.

2b: you can also use the method "onPaint(Graphics2D)" of the Robot class.

Re: paint on robocode map?

2008-07-04T10:01:40Z

asdasddsa321 wrote:
> Hello everybody,
> I'm implementing an anti-gravity movement, but I think it's not
> working at best, so I want print my anti-gravity point on the map.
> I have to grab the object Graphics and then paint without breaking any
> robocode security rule.
> There is a (simple) way to do that? Have anybody do that?
> thank for your attention
>
There is a event provided for this, onPaint. You can modify the
Graphics2D object which is given as a parameter. Look at the Robocode
API for more details.

However, many people have had better luck with Minimum Risk Movement.
What this does is generate a bunch of points around you, and then
decides which is the least dangerous to go to, depending on where
enemies are etc. This prevents you from getting stuck in a 'local minimum'.

> p.s. I'm sorry for my poor English, I hope you have understand :-)
>

Your english is fine =)

Julian (AKA Skilgannon)

paint on robocode map?

2008-07-04T07:09:46Z

Hello everybody,
I'm implementing an anti-gravity movement, but I think it's not
working at best, so I want print my anti-gravity point on the map.
I have to grab the object Graphics and then paint without breaking any
robocode security rule.
There is a (simple) way to do that? Have anybody do that?
thank for your attention

p.s. I'm sorry for my poor English, I hope you have understand :-)

Re: Robots using DFA

2008-06-30T23:12:08Z

Hi,

Well, normally robots in Robocode runs as very complex NFAs (non-
deterministic finite automaton).

With Robocode 1.6.1 Beta (was release two days ago), you can set a
random seed using the new -DRANDOMSEED option. This way the robots
will behave deterministic. You could donwload 1.6.1 Beta, and then
change your robocode.bat/sh file to contain:

java -Xmx512M -Dsun.io.useCanonCaches=false -DRANDOMSEED=12345678 -cp
libs/robocode.jar;libs/codesize.jar;libs/cachecleaner.jar
robocode.Robocode

Next step would be to simplify the robot commands etc. So that you
could e.g. turn to North (0 deg), East (90 deg), South (180 deg),
North (270 deg). You could have e.g. 3 types of fires like fire(1),
fire(2) and fire(3). I hope you get the idea. Then you basically have
to make if-statements checking some condition, and then call one or
more of you simplified commands. This way it will be possible to
create a DFA. Also notice, that you could use the JuniorRobot, which
is a very simplified robot type compared to the Robot and
AdvancedRobot class.

You could also get some inspiration from the RobocodeJGAP project,
which is used for Genetic Algorithms. Here, commands etc. are
translated into string, which are then "mutated" using various
genetic methods. Even though you just need a basic DFA, you could use
a string representation similar to the one used in RobocodeJGAP, and
base your DFA on this string representation.

You can get information about RobocodeJGAP from here:

http://jgap.sourceforge.net/doc/robocode/robocode.html

You could perhaps contact Klaus Meffert, the author of RobocodeJGAP.
He might have some good ideas for how you could represent a DFA using
strings. :-)

Best regards,
- Flemming N. Larsen

--- In Robocode@..., "Thiago Monteiro"
<supermonteiro@...> wrote:
>
> the DUEL/MELEE/ALONE idea is awesome :-D ty very much for it!
> However i never implemented a robot yet, how should i create these
> behaviors?
> I have to do this fast or I won't graduate on time =(
>
> 2008/6/30 Julian Kent <jkflying@...>:
>
> > From what I've seen, it is better to work on improving one
strategy to
> > deal with any situation, than to make different strategies for
different
> > situations. There are several things, like the DUEL/MELEE/ALONE
example
> > which you gave, which have clearly defined barriers, but most of
the
> > time you are working with shades of grey. From the example you
gave, it
> > would be simpler to hard code the behaviour, because it is not
ever
> > going to be expanded upon. Although YMMV, that's the way I would
do it
> > =) I prefer not to complicate things =)
> >
> > Julian (AKA Skilgannon)
> >
> >
> > Allan Halme wrote:
> > > I've studied, designed, and developed state machines and in the
> > > context of Robocode, I would apply them to managing the
internal state
> > > of the robot, not to determine specific firing angles, power,
and
> > > movement, etc, but rather to decide what strategy or tactics to
be
> > > applying.
> > >
> > > As a simple example, imagine three states, DUEL, MELEE, ALONE.
If the
> > > radar scans one enemy robot, the state machine transitions to
the DUEL
> > > state and then that determines strategy. If the radar picks up
> > > multiple enemies, transition to MELEE and then run the bot
based on
> > > that, and if the radar doesn't find any enemies, go to ALONE
state.
> > > This last state is interesting on a very large battlefield,
where
> > > there may be enemies outside of the radar's range, so the ALONE
state
> > > may kick in some movement strategy aimed at searching out
enemies in
> > > the battlefield, etc.
> > >
> > > Making use of a state machine to actually decide on movement,
> > > targeting, and firing, is an interesting thought. Discussion on
that

> > > would, I think, best be taken up on the wiki as well.
> > >
> > > Regards,
> > > allan
> > >
> >
> >
> >
>
>
>
> --
> Prolins IT SOLUTIONS
> Desenvolvedor / Analista
>
> "Atrasos são temporários. A mediocridade é eterna."
>

Re: Robots using DFA

2008-06-30T17:17:43Z

the DUEL/MELEE/ALONE idea is awesome :-D ty very much for it!
However i never implemented a robot yet, how should i create these
behaviors?
I have to do this fast or I won't graduate on time =(

2008/6/30 Julian Kent <jkflying@...>:

> From what I've seen, it is better to work on improving one strategy to
> deal with any situation, than to make different strategies for different
> situations. There are several things, like the DUEL/MELEE/ALONE example
> which you gave, which have clearly defined barriers, but most of the
> time you are working with shades of grey. From the example you gave, it
> would be simpler to hard code the behaviour, because it is not ever
> going to be expanded upon. Although YMMV, that's the way I would do it
> =) I prefer not to complicate things =)
>
> Julian (AKA Skilgannon)
>
>
> Allan Halme wrote:
> > I've studied, designed, and developed state machines and in the
> > context of Robocode, I would apply them to managing the internal state
> > of the robot, not to determine specific firing angles, power, and
> > movement, etc, but rather to decide what strategy or tactics to be
> > applying.
> >
> > As a simple example, imagine three states, DUEL, MELEE, ALONE. If the
> > radar scans one enemy robot, the state machine transitions to the DUEL
> > state and then that determines strategy. If the radar picks up
> > multiple enemies, transition to MELEE and then run the bot based on
> > that, and if the radar doesn't find any enemies, go to ALONE state.
> > This last state is interesting on a very large battlefield, where
> > there may be enemies outside of the radar's range, so the ALONE state
> > may kick in some movement strategy aimed at searching out enemies in
> > the battlefield, etc.
> >
> > Making use of a state machine to actually decide on movement,
> > targeting, and firing, is an interesting thought. Discussion on that
> > would, I think, best be taken up on the wiki as well.
> >
> > Regards,
> > allan
> >
>
>
>

--
Prolins IT SOLUTIONS
Desenvolvedor / Analista

"Atrasos são temporários. A mediocridade é eterna."

Re: Robots using DFA

2008-06-30T05:23:00Z

From what I've seen, it is better to work on improving one strategy to
deal with any situation, than to make different strategies for different
situations. There are several things, like the DUEL/MELEE/ALONE example
which you gave, which have clearly defined barriers, but most of the
time you are working with shades of grey. From the example you gave, it
would be simpler to hard code the behaviour, because it is not ever
going to be expanded upon. Although YMMV, that's the way I would do it
=) I prefer not to complicate things =)

Julian (AKA Skilgannon)

Allan Halme wrote:

> I've studied, designed, and developed state machines and in the
> context of Robocode, I would apply them to managing the internal state
> of the robot, not to determine specific firing angles, power, and
> movement, etc, but rather to decide what strategy or tactics to be
> applying.
>
> As a simple example, imagine three states, DUEL, MELEE, ALONE. If the
> radar scans one enemy robot, the state machine transitions to the DUEL
> state and then that determines strategy. If the radar picks up
> multiple enemies, transition to MELEE and then run the bot based on
> that, and if the radar doesn't find any enemies, go to ALONE state.
> This last state is interesting on a very large battlefield, where
> there may be enemies outside of the radar's range, so the ALONE state
> may kick in some movement strategy aimed at searching out enemies in
> the battlefield, etc.
>
> Making use of a state machine to actually decide on movement,
> targeting, and firing, is an interesting thought. Discussion on that
> would, I think, best be taken up on the wiki as well.
>
> Regards,
> allan
>

Re: Robots using DFA

2008-06-30T00:04:52Z

I've studied, designed, and developed state machines and in the context of
Robocode, I would apply them to managing the internal state of the robot,
not to determine specific firing angles, power, and movement, etc, but
rather to decide what strategy or tactics to be applying.

As a simple example, imagine three states, DUEL, MELEE, ALONE. If the radar
scans one enemy robot, the state machine transitions to the DUEL state and
then that determines strategy. If the radar picks up multiple enemies,
transition to MELEE and then run the bot based on that, and if the radar
doesn't find any enemies, go to ALONE state. This last state is interesting
on a very large battlefield, where there may be enemies outside of the
radar's range, so the ALONE state may kick in some movement strategy aimed
at searching out enemies in the battlefield, etc.

Making use of a state machine to actually decide on movement, targeting, and
firing, is an interesting thought. Discussion on that would, I think, best
be taken up on the wiki as well.

Regards,
allan

On Mon, Jun 30, 2008 at 3:56 AM, Big Mike Forsberg <bigmike@...> wrote:

> Trying to remember my Automata Theory class....
>
> I think it would be possible to use DFA to automate a robot.
>
> The key is to make the nodes a specific correction to the state robot.
>
> For instance the following is a DFA for a robot.
>
> States
> Node one - turn left + 5 degrees
> Node two - fire full power
> Transitions
> Node two + Hit > Node 2
> Node two + Miss > Node 1
> Node 1 + anything > Node 2
>
> There is you DFA, very simplistic.
>
> Hope I helped,
>
> Thanks to my CS345 professor at UT. (I think that was the class)
>
> Big Mike
>
>
> On Sun, Jun 29, 2008 at 09:36:38PM +0200, Julian Kent wrote:
> >
> > On Fri, 27 Jun 2008 18:53:56 -0300, "Thiago Monteiro"
> > <supermonteiro@... <supermonteiro%40gmail.com>> said:
> > > I'm working in a Robot using DFAs on its behavior, was wondering if
> > > anyone
> > > had any example they could share.
> > > To those who dont know what DFA means,
> > > http://en.wikipedia.org/wiki/Deterministic_finite_state_machine.
> > > Any help is really appreciated :-)
> >
> > From the wiki page it seems that DFA only gives true/false statements. I
> > would be interested in what you would use a DFA for in a robot.
> > Generally you don't need a true/false answer, but instead something like
> > a double (for an angle to shoot at), or an array of ints or doubles (the
> > danger at specific points/angles for movement).
> >
> > As far as I know no robots use DFAs. However ask on Robowiki.net,
> > somebody else might know of something =)
> >
> > --
> >
> > Julian (AKA Skilgannon on robowiki)
> >
> > --
> > http://www.fastmail.fm - Or how I learned to stop worrying and
> > love email again
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>
> --
> Auto generated sentence :
> The cash pitches maniacal jukebox in the Bastille.
>
>

Re: Robots using DFA

2008-06-29T17:56:33Z

Trying to remember my Automata Theory class....

I think it would be possible to use DFA to automate a robot.

The key is to make the nodes a specific correction to the state robot.

For instance the following is a DFA for a robot.

States
Node one - turn left + 5 degrees
Node two - fire full power
Transitions
Node two + Hit > Node 2
Node two + Miss > Node 1
Node 1 + anything > Node 2

There is you DFA, very simplistic.

Hope I helped,

Thanks to my CS345 professor at UT. (I think that was the class)

Big Mike

On Sun, Jun 29, 2008 at 09:36:38PM +0200, Julian Kent wrote:

>
> On Fri, 27 Jun 2008 18:53:56 -0300, "Thiago Monteiro"
> <supermonteiro@...> said:
> > I'm working in a Robot using DFAs on its behavior, was wondering if
> > anyone
> > had any example they could share.
> > To those who dont know what DFA means,
> > http://en.wikipedia.org/wiki/Deterministic_finite_state_machine.
> > Any help is really appreciated :-)
>
> From the wiki page it seems that DFA only gives true/false statements. I
> would be interested in what you would use a DFA for in a robot.
> Generally you don't need a true/false answer, but instead something like
> a double (for an angle to shoot at), or an array of ints or doubles (the
> danger at specific points/angles for movement).
>
> As far as I know no robots use DFAs. However ask on Robowiki.net,
> somebody else might know of something =)
>
> --
>
> Julian (AKA Skilgannon on robowiki)
>
> --
> http://www.fastmail.fm - Or how I learned to stop worrying and
> love email again
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

--
Auto generated sentence :
The cash pitches maniacal jukebox in the Bastille.