ROBOCODE CONTEST v2

ROBOCODE CONTEST : 

1 ROBOCODE CONTEST  Dr. Xiang Fu, Georgia Southwestern State University Sponsored by GSW-ACM Chapter, CIS School

Acknowledgements : 

2 Acknowledgements Robocode is the brainchild of Mathew Nelson, a software engineer in the Advanced Technology, Internet division at IBM.

OUTLINE : 

3 OUTLINE Introduction (10 min) Game Physics & API (15 min) Practices (20 min) Circular Walker Smart Shooter JBuilder Setup (5 min) Contest Rules (3 min)

What is Robocode? : 

4 What is Robocode? Programming Game 1 rectangular arena 2 teams of robots Survivor the winner Unique feature Player must write Java code Mechanics Tactics Strategy Quality of code matters

Why Robocode? : 

5 Why Robocode? It’s fun! Arena to sharpen skills! Great trophy waiting for you! ACM student pack, ... More potential opportunities!

How to Play? : 

6 How to Play? Install Robocode Requirement: Any PC Box with popular OS (windows, Linux, Solaris, ...) Java JDK1.4.2 above installed (freely available at http://java.com/en/download/index.jsp) Read Documentation Program Your Robots Then Have fun!

Installation (for CWH 221) : 

7 Installation (for CWH 221) This slide is for CWH 221 only! Skip this slide for your own computer! Set up Path Control Panel  System  Advanced  System Variables  Add “PATH” set value: “c:\Borland\JBuilder2005\JDK1.4\bin”

Installation : 

8 Installation Visit http://sourceforge.net/ Download robocode-setup-1.0.7.jar Three ways to install: (1) double click on the jar file (2) in cmd window, type “java –jar robocode-setup-1.0.7.jar” (3) in cmd window create a folder “robocode” to hold .jar “jar –xvf robocode-setup-1.0.7.jar” “jar –xvf extract.jar” To run: type “robocode.bat”

Game Physics : 

9 Game Physics

Robot Anatomy : 

10 Robot Anatomy Tank Body ahead, back, rotate Gun fire, rotate Radar rotate, scan, by default, rotate with gun

Tank Ability : 

11 Tank Ability Tank Speed: 1 – 5 pixels per round Energy Points: 100 Ammunition NOT unlimited! Each bullet costs 1 to 3 pt speed: 20 – 3 * power damage: 4 * power or 6*power-2 if power > 1 hit reward: 3 * power hit rate < 30% == > hurt energy! hit rate < 15% == > die earlier than enemy

Tank Control Interface : 

12 Tank Control Interface Write a Java , extending Robot AdvancedRobot Override function run() Specify its routine behavior e.g., sweep radar, go ahead, turn around 180 degrees, back up ... Override event handler e.g., onHitByBullet() e.g., onScannedRobot()

Events : 

13 Events ScannedRobotEvent Enemy distance to me Enemy bearing Enemy energy Enemy velocity BulletHitEvent BulletMissedEvent HitByBulletEvent HitRobotEvent HitWallEvent MessageEvent RobotDeathEvent WinEvent

Blocking Calls : 

14 Blocking Calls void ahead(double distance) void back(double distance) void stop() void resume() void turnGunLeft(double degrees) void turnGunRight(double degrees) void turnLeft(double degrees) void turnRight(double degrees) void turnRadarLeft(double degrees) void turnRadarRight(double degrees) void waitFor(robocode.Condition condition) Call does not return until requested action completed or interrupted by events, or condition is met

Non-Blocking Calls : 

15 Non-Blocking Calls void setAhead(double distance) void setBack(double distance) void setResume() void setStop() void setTurnGunLeft(double degrees) void setTurnGunRight(double degrees) void setTurnLeft(double degrees) void setTurnRadarLeft(double degrees) void setTurnRadarRight(double degrees) void setTurnRight(double degrees) Call returns immediately. Multiple actions can be executed simultaneously. Usually provided by AdvancedRobot class

Example : 

16 Example What does the code below do? setTurnRight(360); setAhead(200); waitFor(new TurnCompleteCondition(this));

Many Other Calls : 

17 Many Other Calls double getEnergy() double getHeight(), getWidth() double getX(), getY() double getVelocity() int getOthers() string getName() double getBattleFieldWidth() double getBattleFieldHeight()

Important Angles : 

18 Important Angles double getHeading() double getGunHeading() double getRadarHeading() void setAdjustGunForRobotTurn(boolean) void setAdjustRadarForGunTurn(boolean) void setAdjustRadarForRobotTurn(boolean)

When Enemy Detected : 

19 When Enemy Detected ScannedRobotEvent double getBearing() in degrees double getBearingRadians() in radians Note: getBearing() NOT affected by enemy heading or gunHeading.

More Information? : 

20 More Information? Complete API available at $installdir/javadoc/index.html Read the following classes! Robot AdvancedRobot ScannedRobotEvent, ... Event...

Practice Time : 

21 Practice Time

Task1: Rectangle Walker : 

22 Task1: Rectangle Walker Fire when enemy detected Walk on the perimeter of a rectangle (edge length 200) Algorithm: 1. Adjust the heading to 0’ 2. loop{ go ahead 200 turn right 90’ }

Source Code : 

23 Source Code public void run() { //1. set the heading angle to 0' turnLeft(this.getHeading()); //2. loop, walk and turn while(true){ ahead(100); turnRight(90); } }

Task2: CircleWalker : 

24 Task2: CircleWalker Hint: Use AdvancedRobot

Algorithm : 

25 Algorithm Hint: Use AdvancedRobot Algorithm: loop{ setTurnRight(180) setAhead(a big number) wait until turn complete turnLeft(90) }

Source Code : 

26 Source Code public void run() { while(true) { turnLeft(this.getHeading()); while(true){ setTurnRight(180); setAhead(30000); waitFor(new TurnCompleteCondition(this)); setAhead(0); turnLeft(90); } } }

Who’s the BEST ROBOT? : 

27 Who’s the BEST ROBOT? Set up a battle with 3 rounds Enlist all robots available (except teams) Who’s the best performer? Walls or SpinBot Because they move fast and hard to aim!

Task3: WallKiller : 

28 Task3: WallKiller Design a Smart Shooter which can correct calculate the fire-angle to kill a wall robot easily! We need a little bit Maths!

For DIGITAL COPY of Code : 

29 For DIGITAL COPY of Code Log in ACM_GSW@hotmail.com Passwd: abc123#001 Copy&Paste the file Play with it!

Magic of Mathematics : 

30 Magic of Mathematics Known Facts: enemy speed, distance, enemy heading, enemy velocity, bullet velocity formula, my heading, my gun heading

Known System Parameters : 

31 Known System Parameters Assume bullet travel time: t Let v1 = 20-3*bulletPower Let v2 = ScannedRobotEvent.getVelocity() v1 * t v2 * t d

Known System Parameters : 

32 Known System Parameters this.getHeading() ScannedRobotEvent.getHeading() beta = (180-Event.getHeading) + this.getHeading() + Event.getBearing()

Calculate Bullet Travel Time : 

33 Calculate Bullet Travel Time v1 * t v2 * t d

Calculate Firing Angle : 

34 Calculate Firing Angle v1 * t v2 * t d alpha?

The Real Firing Angle : 

35 The Real Firing Angle = this.getHeading() + Event.getBearing() + alpha

Source Code : 

36 Source Code private double getBulletSpeed(double power) { return 20.0 - 3.0 * power; }

Source Code : 

37 Source Code public void onScannedRobot(ScannedRobotEvent e) { //setting the parameters double d = e.getDistance(); double beta = e.getHeading() + (180- e.getBearing() + this.getHeading()); double v2 = e.getVelocity(); double v1 = this.getBulletSpeed(2); double A = v2*v2-v1*v1; double B = -2*d*v2*Math.cos(Math.toRadians(beta)); double C = d*d;

Source Code : 

38 Source Code //continued from the previous slide double t = (Math.sqrt(B*B-4*A*C)-B)/(2*A); double alpha = Math.acos( (v2*v2*t*t+d*d-v1*v1*t*t)/(2*d*v2*t)); alpha = Math.toDegrees(beta); double fireAngle = (this.getHeading() + e.getBearing() + alpha) - this.getGunHeading(); turnRight(fireAngle); fire(2); }

Dubug: JBuilder Setup : 

39 Dubug: JBuilder Setup

JBuilder : 

40 JBuilder Foundation version is Free! Go to Borland site to download to your own computer We have JBuilder installed in CWH 221!

Set Up JBuilder : 

41 Set Up JBuilder Create Library Reference for Robocode.jar Tools  Configure  Libraries Click “new button” on left bottom Input name “robocode”, click “ok” click “add” button on the right scroll down and select “robocode/robocode.jar” click “ok” and finish

Create Robot in JBuilder : 

42 Create Robot in JBuilder Close all OLD projects File  New Project In Project Manager Window Right click on “__your_proj_name__.jpx” Select and click on “properties” Select the 1st item, “path” as follows Suppose $robocode is the installation dir of robocode Set output path to “$rocode/robots” Set working path to “$robocode” In the tabcontrol, click “required libraries” click “Add”, then add the “robocode” library

Set UP Debugging : 

43 Set UP Debugging click on menu item “run” click on “configurations” click “new” or “edit” set “main class” be “robocode/robocode” Now you can create a file and run. You can also do step by step debugging!

Competition Rules : 

44 Competition Rules Single person team Each team: up to 5 robots Each team will battle against all registered teams Results for each battle will be recorded Winners are ranked according to the number of wins The top 8 winner has $45 trophy each

Arena Size : 

45 Arena Size Each battle needs to be done in 2 sizes 800 * 800 2000 * 2000 Any tie is broken by have additional battles GSW ACM Chapter has the final decision

Honesty Requirement : 

46 Honesty Requirement All work must be completed individually The top 8 winners must be able to present the algorithms and explain the code Should NOT copy source code from sourceforge, or robocode repository

Good Luck! : 

47 Good Luck! Competition starts at Jan. 27th, 2006!