internal Organism <T> GetRandMember(VRandom rng)
{
//int index = rng.RandInt(members.Count);
//int id = members[index];
//return pop.GetMember(id);
//creates a vector to store the probablity distribution
Vector pd = new Vector(members.Count);
//uses the fitness of each member as the weight
for (int i = 0; i < pd.Length; i++)
{
var mem = pop.GetMember(members[i]);
pd[i] = mem.Fitness;
}
//returns a random member based on fitness
int index = rng.SampleDesc(pd);
int id = members[index];
return(pop.GetMember(id));
}