source: src/main/java/uva/projectai/y2018/jasparon/JasparonBidComparator.java@ 127

package uva.projectai.y2018.jasparon;

import java.util.Comparator;

import genius.core.bidding.BidDetails;
import genius.core.boaframework.OpponentModel;

public class JasparonBidComparator implements Comparator<BidDetails> {
        
        private OpponentModel opponentModel;

        @Override
        public int compare(BidDetails arg0, BidDetails arg1) {
                return getMeasure(arg0) > getMeasure(arg1) ? -1 : 1;
        }
        
        public JasparonBidComparator(OpponentModel opponentModel) {
                this.opponentModel = opponentModel;
        }
        
        /*
         * returns a double that represents the value of a value of a bid, taking into account both the agents 
         * own and opponents' utility. 
         * 
         * Adapted from 2010 AgentSmith ANAC entry
         */
        public double getMeasure(BidDetails b1) {
                double a = (1 - b1.getMyUndiscountedUtil()); 
                double b = (1 - this.opponentModel.getBidEvaluation(b1.getBid()));
                
                double alpha = Math.atan(b/a);
                
                return a + b + (0.5*Math.PI / alpha) * 0.5*Math.PI;
        }

}