@Override
public Hash<UUID, Rocket> evolve() {
Tuple<Rocket> group = topHalfPerformers();
Tuple<Rocket> children = new Tuple<>();
int idx, idx2;
for (int i = 0; i < group.size(); i++) {
idx = Utility.rand(0, group.size() - 1);
idx2 = Utility.rand(0, group.size() - 1);
if (idx == i) idx = (idx + 1) % group.size();
if (idx2 == i) idx2 = (idx + 1) % group.size();
while (idx != idx2 && idx2 != i) idx2 = (idx + 1) % group.size();
children.add(
new Rocket(
tadd(
group.get(i).getChromosome(),
tsub(group.get(idx).getChromosome(), group.get(idx2).getChromosome()))));
}
for (int i = 0; i < group.size(); i++) {
idx = Utility.rand(0, group.size() - 1);
idx2 = Utility.rand(0, group.size() - 1);
if (idx == i) idx = (idx + 1) % group.size();
if (idx2 == i) idx2 = (idx + 1) % group.size();
while (idx != idx2 && idx2 != i) idx2 = (idx + 1) % group.size();
children.add(
new Rocket(
tadd(
group.get(i).getChromosome(),
tsub(group.get(idx).getChromosome(), group.get(idx2).getChromosome()))));
}
Hash<UUID, Rocket> result = new Hash<>();
for (Rocket r : children) result.add(r.getId(), r);
return result;
}
// ===== CONSTRUCTOR
public DifferentialEvolution(Hash<UUID, Rocket> generation) {
this.generation = generation.values();
}