/**
* \brief Mutate an individual.
*
* May mutate one or more genotypes in given individual.
* Determines which MutationOp to use on each genotype.
*/
bool Mutation::mutate(IndividualP ind)
{
ind->fitness->setInvalid();
// set mutation context
state_->getContext()->mutatedIndividual = ind;
ECF_LOG(state_, 5, "Mutating individual: " + ind->toString());
currentInd = ind;
// if mutating a random genotype
if(mutateGenotypes_ == RANDOM_GENOTYPE) {
uint iGenotype = state_->getRandomizer()->getRandomInteger((int)ind->size());
if(protectedGenotypes_[iGenotype])
return false;
// choose operator
uint iOperator;
if(opProb[iGenotype][0] < 0)
iOperator = state_->getRandomizer()->getRandomInteger((int)operators[iGenotype].size());
else {
double random = state_->getRandomizer()->getRandomDouble();
iOperator = 0;
while(opProb[iGenotype][iOperator] < random)
iOperator++;
}
operators[iGenotype][iOperator]->mutate(ind->at(iGenotype));
}
// if mutating all genotypes in the individual
else if(mutateGenotypes_ == ALL_GENOTYPES) {
for(uint iGenotype = 0; iGenotype < ind->size(); iGenotype++) {
if(protectedGenotypes_[iGenotype])
continue;
// choose operator
uint iOperator;
if(opProb[iGenotype][0] < 0)
iOperator = state_->getRandomizer()->getRandomInteger((int)operators[iGenotype].size());
else {
double random = state_->getRandomizer()->getRandomDouble();
iOperator = 0;
while(opProb[iGenotype][iOperator] < random)
iOperator++;
}
operators[iGenotype][0]->mutate(ind->at(iGenotype));
}
}
ECF_LOG(state_, 5, "Mutated individual: " + ind->toString());
return true;
}
