Difference between revisions of "Yatagan/Source"

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(1.0..2 - fix the char based energy detection, it seems 1 doesn't work)
(Added a developmental version.)
Line 1: Line 1:
 +
== Development Version ==
  
 +
<syntaxhighlight>
 +
/*
 +
Yatagan 1.0.3 by Sheldor & Skilgannon; Release date:  3-21-2013
 +
The yatagan is a short sabre which was used extensively in the Ottoman Empire.
 +
Codesize:  247 bytes;  Code size class:  NanoBot
 +
 +
Credits:
 +
Pattern Matching code from simonton.WeekendObsession_S and mld.Moebius, heavily modified.
 +
And a general thanks to all open source bot authors and contributors to the RoboWiki.
 +
 +
Yatagan is open source and released under the terms of the RoboWiki Public Code License (RWPCL) - Version 1.1
 +
see license here: http://robowiki.net/wiki/RWPCL
 +
*/
 +
 +
package sheldor.jk;
 +
 +
import robocode.*;
 +
import robocode.util.Utils;
 +
 +
public class Yatagan extends AdvancedRobot
 +
{
 +
//Global variables.
 +
  static double direction;
 +
  static double enemyEnergy;
 +
 +
  static int deathCount;
 +
 +
  public void run()
 +
  {
 +
      //setAdjustGunForRobotTurn(true);
 +
 
 +
  //Start spinning radar and initialize direction to infinity.
 +
      setTurnRadarRightRadians(direction = Double.POSITIVE_INFINITY);
 +
  }
 +
 +
  public void onScannedRobot(ScannedRobotEvent e)
 +
  {
 +
  //Local variables.
 +
      int integer = 30;
 +
      double absoluteBearing;
 +
      double distance;
 +
      int matchPosition;
 +
 
 +
      //Watch for a drop in the enemy's energy between 0 and 3.  Thanks to Miked0801 for his awesome char trick.
 +
      if( (char) ((enemyEnergy - 1.09999  - (enemyEnergy = e.getEnergy()))) <= 1)
 +
      {
 +
        //One-way/Oscillating/Random movement.
 +
        direction *= (chancesOfReversing.charAt(deathCount) - 2*Math.random());
 +
      }
 +
      setAhead(direction);
 +
 
 +
  //Stay mostly perpendicular to the enemy, but try to maintain a distance of 160 pixels.
 +
      setTurnRightRadians(Math.cos(absoluteBearing = e.getBearingRadians()) + ((160.0 - (distance = e.getDistance())) * (getVelocity() *4e-4)));
 +
 
 +
  //Pattern Matching.
 +
      enemyHistory = String.valueOf((char) (e.getVelocity() * (Math.sin(e.getHeadingRadians() - (absoluteBearing += getHeadingRadians()))))).concat(enemyHistory);
 +
 
 +
  // search for a match
 +
      while((matchPosition = enemyHistory.indexOf(enemyHistory.substring(0, integer--), 64)) < 0);
 +
 
 +
      integer = (int)(distance);
 +
  // calculate aim offset
 +
     
 +
      do {
 +
        absoluteBearing += ((short) enemyHistory.charAt(--matchPosition)) /  distance;
 +
      } while ((integer -= 12) > 0);
 +
 
 +
  //Aim at the predicted target.
 +
      setTurnGunRightRadians(Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
 +
 
 +
      //Fire!
 +
      //The bullet power must be a multiple of .3333333333333333333333...
 +
      setFire(2.666666666666666666666666666666666666666666666666666666);
 +
 
 +
  //Infinite radar lock.
 +
      setTurnRadarLeftRadians(getRadarTurnRemainingRadians());
 +
  }
 +
 +
  public void onDeath(DeathEvent e)
 +
  {
 +
      //Move to the next cell in the table every time the bot dies.
 +
      deathCount++;
 +
  }
 +
 +
  public void onHitWall(HitWallEvent e)
 +
  {
 +
  //Reverse direction when the bot hits a wall.
 +
      direction = -direction;
 +
  }
 +
 +
//The chance that the bot will reverse orbit direction when the enemy fires.
 +
//Since this is an unchanging table, we can save a few bytes by using "final."
 +
  private static final String chancesOfReversing = ""
 +
  + (char) 2 + (char) 0 + (char) 2 + (char) 0
 +
  + (char) 2 + (char) 0 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1;
 +
 +
//Preloaded log of enemy movements for pattern matcher so it doesn't need error checking
 +
  static String enemyHistory = ""
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 2
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char) 1 + (char) 1 + (char) 1
 +
  + (char) 1 + (char)-2 + (char)-4 + (char)-6
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-8 + (char)-8 + (char)-8 + (char)-8
 +
  + (char)-7 + (char)-6 + (char)-5 + (char)-4
 +
  + (char)-3 + (char)-2 + (char)-1 + (char)1
 +
  + (char) 2 + (char) 4 + (char) 6 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 8 + (char) 8 + (char) 8 + (char) 8
 +
  + (char) 7 + (char) 6 + (char) 5 + (char) 4
 +
  + (char) 3 + (char) 2 + (char) 1 + (char) 1;
 +
}
 +
 +
</syntaxhighlight>
  
 
== Version 1.0.2 ==
 
== Version 1.0.2 ==

Revision as of 14:41, 21 March 2013

Development Version

/*
Yatagan 1.0.3 by Sheldor & Skilgannon; Release date:  3-21-2013
The yatagan is a short sabre which was used extensively in the Ottoman Empire.
Codesize:  247 bytes;  Code size class:  NanoBot
 
Credits: 
Pattern Matching code from simonton.WeekendObsession_S and mld.Moebius, heavily modified.
And a general thanks to all open source bot authors and contributors to the RoboWiki.
 
Yatagan is open source and released under the terms of the RoboWiki Public Code License (RWPCL) - Version 1.1
see license here: http://robowiki.net/wiki/RWPCL
*/
 
package sheldor.jk;
 
import robocode.*;
import robocode.util.Utils;
 
public class Yatagan extends AdvancedRobot
{
//Global variables.
   static double direction;
   static double enemyEnergy;
 
   static int deathCount;

   public void run()
   {
      //setAdjustGunForRobotTurn(true);
   
   //Start spinning radar and initialize direction to infinity.
      setTurnRadarRightRadians(direction = Double.POSITIVE_INFINITY);
   }
 
   public void onScannedRobot(ScannedRobotEvent e)
   {
   //Local variables.
      int integer = 30;
      double absoluteBearing;
      double distance;
      int matchPosition;
   
      //Watch for a drop in the enemy's energy between 0 and 3.  Thanks to Miked0801 for his awesome char trick.
      if( (char) ((enemyEnergy - 1.09999  - (enemyEnergy = e.getEnergy()))) <= 1)
      {
         //One-way/Oscillating/Random movement.
         direction *= (chancesOfReversing.charAt(deathCount) - 2*Math.random());
      }		
      setAhead(direction);
   
   //Stay mostly perpendicular to the enemy, but try to maintain a distance of 160 pixels.
      setTurnRightRadians(Math.cos(absoluteBearing = e.getBearingRadians()) + ((160.0 - (distance = e.getDistance())) * (getVelocity() *4e-4)));
   
   //Pattern Matching.
      enemyHistory = String.valueOf((char) (e.getVelocity() * (Math.sin(e.getHeadingRadians() - (absoluteBearing += getHeadingRadians()))))).concat(enemyHistory);
   
   // search for a match
      while((matchPosition = enemyHistory.indexOf(enemyHistory.substring(0, integer--), 64)) < 0);
   
      integer = (int)(distance);
   // calculate aim offset
      
      do { 
         absoluteBearing += ((short) enemyHistory.charAt(--matchPosition)) /  distance;
      } while ((integer -= 12) > 0);
   
   //Aim at the predicted target.
      setTurnGunRightRadians(Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
   
      //Fire!
      //The bullet power must be a multiple of .3333333333333333333333...
      setFire(2.666666666666666666666666666666666666666666666666666666);
   
   //Infinite radar lock.
      setTurnRadarLeftRadians(getRadarTurnRemainingRadians());
   }
 
   public void onDeath(DeathEvent e)
   {
      //Move to the next cell in the table every time the bot dies.
      deathCount++;
   }
 
   public void onHitWall(HitWallEvent e)
   {
   //Reverse direction when the bot hits a wall.
      direction = -direction;
   }
 
 //The chance that the bot will reverse orbit direction when the enemy fires.
 //Since this is an unchanging table, we can save a few bytes by using "final."
   private static final String chancesOfReversing = ""
   + (char) 2 + (char) 0 + (char) 2 + (char) 0
   + (char) 2 + (char) 0 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1;
 
//Preloaded log of enemy movements for pattern matcher so it doesn't need error checking
   static String enemyHistory = ""
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
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   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-7 + (char)-6 + (char)-5 + (char)-4
   + (char)-3 + (char)-2 + (char)-1 + (char)1
   + (char) 2 + (char) 4 + (char) 6 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 7 + (char) 6 + (char) 5 + (char) 4
   + (char) 3 + (char) 2 + (char) 1 + (char) 1;
}

Version 1.0.2

/*
Yatagan 1.0.2 by Sheldor & Skilgannon
The yatagan is a short sabre which was used extensively in the Ottoman Empire.
 
Credits: 
Pattern Matching code from simonton.WeekendObsession_S and mld.Moebius, heavily modified,
and a general thanks to all open source bot authors and contributors to the RoboWiki.
 
Yatagan is open source and released under the terms of the RoboWiki Public Code License (RWPCL) - Version 1.1
see license here: http://robowiki.net/wiki/RWPCL
*/
 
package sheldor.jk;
 
import robocode.*;
import robocode.util.Utils;
 
public class Yatagan extends AdvancedRobot
{
//Global variables.
   static double direction;
   static double enemyEnergy;
 
   static int deathCount;	
 
//En garde!
   public void run()
   {
      //setAdjustGunForRobotTurn(true);
   
   //Start spinning radar and initialize direction to infinity.
      setTurnRadarRightRadians(direction = Double.POSITIVE_INFINITY);
   }
 
   public void onScannedRobot(ScannedRobotEvent e)
   {
   //Local variables.
      int integer = 30;
      double absoluteBearing;
      double distance;
      int matchPosition;
   
   //Oscillating/Random movement.
      if( (char) ((enemyEnergy - 1.09999  - (enemyEnergy = e.getEnergy()))) <= 1)
      {
         direction *= (chancesOfReversing.charAt(deathCount) - 2*Math.random());
      }		
      setAhead(direction);
   
   //Stay perpendicular to the enemy.
      setTurnRightRadians(Math.cos(absoluteBearing = e.getBearingRadians()) + ((160.0 - (distance = e.getDistance())) * (getVelocity() *4e-4)));
   
   //Pattern Matching.
      enemyHistory = String.valueOf((char) (e.getVelocity() * (Math.sin(e.getHeadingRadians() - (absoluteBearing += getHeadingRadians()))))).concat(enemyHistory);
   
   // search for a match
      while((matchPosition = enemyHistory.indexOf(enemyHistory.substring(0, integer--), 64)) < 0);
   
      integer = (int)(distance);
   // calculate aim offset
      
      do { 
         absoluteBearing += ((short) enemyHistory.charAt(--matchPosition)) /  distance;
      } while ((integer -= 12) > 0);
   
   //Aim at the predicted target.
      setTurnGunRightRadians(Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
   
   //Fire!
      setFire(2.6666666666666);
   
   //Infinite radar lock.
      setTurnRadarLeftRadians(getRadarTurnRemainingRadians());
   }
 
   public void onDeath(DeathEvent e)
   {
      deathCount++;
   }
 
   public void onHitWall(HitWallEvent e)
   {
   //Reverse direction when the bot hits a wall.
      direction = -direction;
   }
 
 //chance out of 3 for given number of deaths, 'final' saves a few bytes
   private static final String chancesOfReversing = ""
   + (char) 2 + (char) 0 + (char) 2 + (char) 0
   + (char) 2 + (char) 0 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1;
 
//Preloaded log of enemy movements for pattern matcher so it doesn't need error checking
   static String enemyHistory = ""
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
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   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char)-2 + (char)-4 + (char)-6
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-8 + (char)-8 + (char)-8 + (char)-8
   + (char)-7 + (char)-6 + (char)-5 + (char)-4
   + (char)-3 + (char)-2 + (char)-1 + (char)1
   + (char) 2 + (char) 4 + (char) 6 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
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   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 8 + (char) 8 + (char) 8 + (char) 8
   + (char) 7 + (char) 6 + (char) 5 + (char) 4
   + (char) 3 + (char) 2 + (char) 1 + (char) 1;
}

Version 1.0.1

/*
Yatagan 1.0.1 by Sheldor & Skilgannon
The yatagan is a short sabre which was used extensively in the Ottoman Empire.
 
Credits: 
Pattern Matching code from simonton.WeekendObsession_S and mld.Moebius, heavily modified,
and a general thanks to all open source bot authors and contributors to the RoboWiki.
 
Yatagan is open source and released under the terms of the RoboWiki Public Code License (RWPCL) - Version 1.1
see license here: http://robowiki.net/wiki/RWPCL
*/
 
package sheldor.jk;
 
import robocode.*;
import robocode.util.Utils;
 
public class Yatagan extends AdvancedRobot
{
//Global variables.
   static double direction;
   static double enemyEnergy;
 
   static int deathCount;	
 
//En garde!
   public void run()
   {
      //setAdjustGunForRobotTurn(true);
   
   //Start spinning radar and initialize direction to infinity.
      setTurnRadarRightRadians(direction = Double.POSITIVE_INFINITY);
   }
 
   public void onScannedRobot(ScannedRobotEvent e)
   {
   //Local variables.
      int integer = 30;
      double absoluteBearing;
      double distance;
      int matchPosition;
   
   //Oscillating/Random movement.
      if( (char) ((enemyEnergy - 1  - (enemyEnergy = e.getEnergy()))) <= 1)
      {
         direction *= (chancesOfReversing.charAt(deathCount) - 2*Math.random());
      }		
      setAhead(direction);
   
   //Stay perpendicular to the enemy.
      setTurnRightRadians(Math.cos(absoluteBearing = e.getBearingRadians()) + ((160.0 - (distance = e.getDistance())) * (getVelocity() *4e-4)));
   
   //Pattern Matching.
      enemyHistory = String.valueOf((char) (e.getVelocity() * (Math.sin(e.getHeadingRadians() - (absoluteBearing += getHeadingRadians()))))).concat(enemyHistory);
   
   // search for a match
      while((matchPosition = enemyHistory.indexOf(enemyHistory.substring(0, integer--), 64)) < 0);
   
      integer = (int)(distance);
   // calculate aim offset
      
      do { 
         absoluteBearing += ((short) enemyHistory.charAt(--matchPosition)) /  distance;
      } while ((integer -= 12) > 0);
   
   //Aim at the predicted target.
      setTurnGunRightRadians(Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
   
   //Fire!
      setFire(2.6666666666666);
   
   //Infinite radar lock.
      setTurnRadarLeftRadians(getRadarTurnRemainingRadians());
   }
 
   public void onDeath(DeathEvent e)
   {
      deathCount++;
   }
 
   public void onHitWall(HitWallEvent e)
   {
   //Reverse direction when the bot hits a wall.
      direction = -direction;
   }
 
 //chance out of 3 for given number of deaths, 'final' saves a few bytes
   private static final String chancesOfReversing = ""
   + (char) 2 + (char) 0 + (char) 2 + (char) 0
   + (char) 2 + (char) 0 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1;
 
//Preloaded log of enemy movements for pattern matcher so it doesn't need error checking
   static String enemyHistory = ""
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1
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}

Version 1.0.0

/*
Yatagan 1.0.0 by Sheldor & Skilgannon
The yatagan is a short sabre which was used extensively in the Ottoman Empire.
 
Credits: 
Pattern Matching code from simonton.WeekendObsession_S and mld.Moebius, heavily modified,
and a general thanks to all open source bot authors and contributors to the RoboWiki.
 
Yatagan is open source and released under the terms of the RoboWiki Public Code License (RWPCL) - Version 1.1
see license here: http://robowiki.net/wiki/RWPCL
*/
 
package sheldor.jk;
 
import robocode.*;
import robocode.util.Utils;
 
public class Yatagan extends AdvancedRobot
{
//Global variables.
   static double direction;
   static double enemyEnergy;
 
   static int deathCount;	
 
//En garde!
   public void run()
   {
     // setAdjustGunForRobotTurn(true);
   
   //Start spinning radar and initialize direction to infinity.
      setTurnRadarRightRadians(direction = Double.POSITIVE_INFINITY);
   }
 
   public void onScannedRobot(ScannedRobotEvent e)
   {
   //Local variables.
      int integer = 30;
      double absoluteBearing;
      double distance;
      int matchPosition;
   
   //Oscillating/Random movement.
      if( (char) ((enemyEnergy - 1.0999  - (enemyEnergy = e.getEnergy()))) < 2)
      {
         direction *= (chancesOfReversing.charAt(deathCount) - 3*Math.random());
      }		
      setAhead(direction);
   
   //Stay perpendicular to the enemy.
      setTurnRightRadians(Math.cos(absoluteBearing = e.getBearingRadians()) + ((160.0 - (distance = e.getDistance())) * (getVelocity() *4e-4)));
   
   //Pattern Matching.
      enemyHistory = String.valueOf((char) (e.getVelocity() * (Math.sin(e.getHeadingRadians() - (absoluteBearing += getHeadingRadians()))))).concat(enemyHistory);
   
   // search for a match
      while((matchPosition = enemyHistory.indexOf(enemyHistory.substring(0, integer--), 64)) < 0);
   
      integer = (int)(distance);
   // calculate aim offset
      
      do { 
         absoluteBearing += ((short) enemyHistory.charAt(--matchPosition)) /  distance;
      } while ((integer -= 12) > 0);
   
   //Aim at the predicted target.
      setTurnGunRightRadians(Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
   
   //Fire!
      setFire(2.6666666666666666666666666666);
   
   //Infinite radar lock.
      setTurnRadarLeftRadians(getRadarTurnRemainingRadians());
   }
 
   public void onDeath(DeathEvent e)
   {
      deathCount++;
   }
 
   public void onHitWall(HitWallEvent e)
   {
   //Reverse direction when the bot hits a wall.
      direction = -direction;
   }
 
 //chance out of 3 for given number of deaths, 'final' saves a few bytes
   private static final String chancesOfReversing = ""
   + (char) 3 + (char) 0 + (char) 3 + (char) 0
   + (char) 3 + (char) 0 + (char) 1 + (char) 1
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   + (char) 1 + (char) 1 + (char) 1 + (char) 1
   + (char) 1 + (char) 1 + (char) 1 + (char) 1;
 
//Preloaded log of enemy movements for pattern matcher so it doesn't need error checking
   static String enemyHistory = ""
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}
Retrieved from "http://robowiki.net/w/index.php?title=Yatagan/Source&oldid=29903"