//Getting tutors, the original runs faster, but cannot get more than one tutor
private static int[] ChooseTutors(SimParams par, Population pop,
List <int> learners, List <int> notVacant)
{
//Picks tutos that are alive, not chicks, and not songless,
//Males can tutor multiple learners
/*remove chicks and songless birds + any Misc, mark all excluded
* birds as unavailable*/
HashSet <int> PotentialTutorsTemp = new HashSet <int>(notVacant.Where(x => pop.Age[x] > 0));
PotentialTutorsTemp.ExceptWith(PotentialTutorsTemp.Where(x => pop.SyllableRepertoire[x] == 0).ToArray());
//pick Tutors
int[] Tutors = new int[learners.Count];
if (par.LocalTutor)
{
//Set up unavailable for local testing
HashSet <int> Unavailable = new HashSet <int>(Enumerable.Range(0, par.NumBirds));
Unavailable.ExceptWith(PotentialTutorsTemp);
for (int i = 0; i < learners.Count; i++)
{
if (par.SocialCues)
{
Tutors[i] = Locations.GetLocalBirds(par, pop, learners[i], Unavailable, 1, pop.Bred)[0];
}
else
{
Tutors[i] = Locations.GetLocalBirds(par, pop, learners[i], Unavailable)[0];
}
}
}
else //drawn individually so no learner is his own tutor
{
List <int> PotentialTutors;
for (int i = 0; i < learners.Count; i++)
{
PotentialTutors = PotentialTutorsTemp.ToList();
PotentialTutors.Remove(learners[i]);
if (par.SocialCues)
{
float[] TutorProbs = new float[PotentialTutors.Count];
for (int j = 0; j < TutorProbs.Length; j++)
{
TutorProbs[j] = pop.Bred[PotentialTutors[j]];
}
Tutors[i] = PotentialTutors[par.RandomSampleUnequal(TutorProbs, 1)[0]];
}
else
{
Tutors[i] = PotentialTutors[par.RandomSampleEqualReplace(PotentialTutors, 1)[0]];
}
}
}
return(Tutors);
}
//Functions for getting the ages
public static int[] InitialAgeDistribution(SimParams par)
{
int[] AgeGroup;
if (par.AgeDeath)
{
float[] AgeRates = GetAgeRates(par);
AgeGroup = GetAgeGroup(par, AgeRates);
}
else
{
List <int> AgeRange = Enumerable.Range(0, par.MaxAge + 1).ToList();
AgeGroup = par.RandomSampleEqualReplace(AgeRange, par.NumBirds);
}
return(AgeGroup);
}
public static int[] GetGlobalBirds(SimParams par, Population pop,
int learner, List <int> potentialBirds, int numBirds = 1)
{
int[] Birds;
List <int> PotentialBirds = potentialBirds.ToList();
PotentialBirds.Remove(learner);
if (numBirds == 1)
{
Birds = par.RandomSampleEqualReplace(PotentialBirds, numBirds);
}
else
{
Birds = par.RandomSampleEqualNoReplace(PotentialBirds, numBirds);
}
return(Birds);
}
//Getting local and global birds
public static int[] GetLocalBirds(SimParams par, Population pop,
int target, HashSet <int> unavailable, int numBirds = 1, float[] probs = null)
{
//pick Tutors locally
int[] Birds = new int[numBirds];
int[] UsableInd;
UsableInd = LocalSearch(par, pop, target, unavailable, numBirds).ToArray();
//return the right number of birds
if (UsableInd.Length == numBirds)//only numTutors choice(s)
{
return(UsableInd);
}
else //Multiple choices
{
if (probs != null)//unequal probabilities
{
int[] Index;
float[] Prob = new float[UsableInd.Length];
for (int j = 0; j < UsableInd.Length; j++)
{
Prob[j] = probs[UsableInd[j]];
}
Index = par.RandomSampleUnequal(Prob, numBirds, false);
for (int j = 0; j < numBirds; j++)
{
Birds[j] = UsableInd[Index[j]];
}
return(Birds);
}
if (numBirds == 1)//can use the faster with replace
{
Birds[0] = UsableInd[par.RandomSampleEqualReplace(UsableInd.ToList(), 1)[0]];
return(Birds);
}//need the slower without replace
Birds = par.RandomSampleEqualNoReplace(UsableInd.ToList(), numBirds);
return(Birds);
}
}
