package rddl.competition.generators;
/**
* A generator for instances of a partially observable reconaissance domain.
*
* @author Tom Walsh
* @version 2/18/11
*
**/
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Random;
public class ReconPOMDPGen extends ReconMDPGen {
public static void main(String[] args) throws Exception {
if (args.length != 10)
usage();
ReconPOMDPGen efg = new ReconPOMDPGen(args);
String content = efg.generate();
PrintStream ps = new PrintStream(
new FileOutputStream(efg.output_dir + File.separator + efg.instance_name + “.rddl”));
ps.println(content);
ps.close();
}
public static void usage() {
System.err.println(“Usage: output-dir instance-name size maxObjects damageProbMax maxHazardDensity lifeDensity horizon discount noiseMax”);
System.err.println(“Example: files/testcomp/rddl recon-2 4 3 0.9 0.5 0.7 0.8 100 0.9 0.2”);
System.exit(127);
}
protected float noiseMax;
public ReconPOMDPGen(String [] args){
super(args);
noiseMax = Float.parseFloat(args[9]);
}
public String generate() {
Random ran = new Random();
String s = super.generate(false);
s = s.replaceAll(“recon_mdp”, “recon_pomdp”);
String[] broken = s.split(“non-fluents \\{“);
String mid = “”;
mid += “\t\tLIFE_PROB = ” + lifeDensity + “;\n”;
mid += “\t\tWATER_PROB = ” + Math.min(lifeDensity + 0.4, 0.8) + “;\n”;
String[] tools = {“w1″,”l1”};
for (String t : tools){
float noise1 = (ran.nextFloat() * noiseMax * 0.99f) + 0.01f;
float noise2 = (ran.nextFloat() * noiseMax * 0.99f) + 0.01f;
mid += “\t\tDAMAGE_OBS(” + t + “) = ”
+ (1.0 – noise1)
+ “;\n”;
mid += “\t\tNOISE_DAMAGE_OBS(” + t + “) = ”
+ (noise2)
+ “;\n”;
}
String [] byLine = broken[1].split(“\n”);
String second =””;
for(String l : byLine)
if(!l.contains(“HAS”))
second += l + “\n”;
return broken[0] + “non-fluents {\n” + mid + second;
}
}