PacMan/src/gr/auth/ee/dsproject/node/Globals.java

/**
 * @file Globals.java
 * @brief
 *    File containing the Globals class, a helper class for the
 *    vector based evaluation system
 * 
 * @author  Christos Choutouridis   8997 cchoutou@ece.auth.gr
 * @author  Konstantina Tsechelidou 8445 konstsec@ece.auth.gr
 */

package gr.auth.ee.dsproject.node;

import gr.auth.ee.dsproject.pacman.PacmanUtilities;

/**
 * @class   Globals
 * @brief
 *    Contains constants and factors to trick
 *    the Node evaluation algorithm
 */
public class Globals {


   /*
    * Evaluation settings
    */
   /**
    *  Mixing factor for the minimum distance
    */
   // ghosts
   public static final double EVAL_GHOSTDIST_MIN_FACTOR = 0.85;
   public static final double EVAL_GHOSTDIST_AVER_FACTOR = 1 - EVAL_GHOSTDIST_MIN_FACTOR;
   public static final double EVAL_GHOSTMINDIST_ISOLATION = 1;
   
   public static final int EVAL_GHOST_BOOST = 2;
   public static final int EVAL_GHOSTBOOST_OFFSET = -25;
   public static final int EVAL_GHOST_TERRITORY = 6;
   public static final int EVAL_GHOSTTERRITORY_OFFSET = -50;
   // flags
   public static final int EVAL_FLAG_BOOST = 2;
   public static final int EVAL_FLAGBOOST_OFFSET = 25;

   /**
    * Evaluation mixing factor representing how much the individual
    * evaluation values(host, flag, torus) affect the final evaluation of the position
    */
   public static final double EVAL_GHOSTDIST_FACTOR = 0.65;
   public static final double EVAL_FLAGDIST_FACTOR = 0.40;
   public static final double EVAL_TORUSDIST_FACTOR = 0.04;


   /*
    * Tree settings
    */
   public static final int MINMAXTREE_MAX_DEPTH = 2;  // MUST be multiple of 2

   
   /*
    * Maze setting
    */
   public static final int[] POSITION_FALSE = {-1, -1};
   
   public static final int DISTANCE_MAX = PacmanUtilities.numberOfRows + PacmanUtilities.numberOfColumns - 1;
   public static final int DISTANCE_FALSE = -1;
   
   public static final int FLAGDIST_MAX = 26;   // add some for safety (lowers the gain)
   public static final int BORDERDIST_MAX = 12; // add some for safety (lowers the gain)
   
   /*
    * In order to find out when a creature is inside a cavity we manually
    * define the box limits of the cavity boxes of the current maze here
    * :) 
    */
   public static final int BOXES[][][] = {
      { { 5,  5}, { 8,  8} },
      { { 5, 16}, { 8, 19} },
      { {11,  5}, {14,  8} },
      { {11, 16}, {14, 19} }
   };

   /**
    * Torus borders are the squares in the outer limits of the maze where
    * there are no walls. Pacman'a gravity can curve the maze plane to
    * a torus through these squares. This function check if a box is
    * a torus border box
    */
   public static final int TORUS_BORDERS[][] = {
      {0, 11},
      {0, 12},
      {0, 13},
      {9, 0},
      {9, 24},
      {10, 0},
      {10, 24},
      {19, 11},
      {19, 12},
      {19, 13},
   };

   
   /*
    * General algorithm constants
    */
   public static final int NO_PLACE = -1;    // out of region square
   public static final int INVALID_MOVE = -1;   // invalid move marker
   
   public static final int EVAL_MAX = 100;      // out max evaluation value
   public static final int EVAL_MIN = 0;        // our minimum evaluation value

   public static final int EVAL_FINAL_MAX = 100;
   public static final int EVAL_FINAL_MIN = -100;
   
   public static final int NO_EVAL = EVAL_FINAL_MIN-1;   // mark the invalid on no evaluation
   
}