ai/genetic-bit-string-evolver
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Added functions to control crossover rate and type

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This commit is contained in:
Mike
2018-04-14 01:07:56 -07:00
parent 5f0b8a4c13
commit b0da515139
5 changed files with 92 additions and 10 deletions
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22
Breeder.cpp
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@ -28,6 +28,7 @@ namespace BitEvolver
std::shared_ptr<Chromosome> Breeder::Breed(
std::shared_ptr<Chromosome> mama,
std::shared_ptr<Chromosome> papa,
Enums::CrossoverType crossover_type,
double crossover_rate,
double mutation_rate
)
@ -36,18 +37,15 @@ namespace BitEvolver
std::shared_ptr<Chromosome> kiddo;
int bit_length;
// For now, don't crossover unless the bit lengths are identical
//
bit_length = mama->GetBitCount();
if ( papa->GetBitCount() != bit_length ) {
throw std::runtime_error("Breeder::Breed() - Incompatible parents");
}
// Directly copy the mama
kiddo = std::shared_ptr<Chromosome>(new Chromosome(this->random, bit_length));
*kiddo = *mama;
// Apply crossover
this->ApplyCrossover(kiddo, papa, crossover_rate);
this->ApplyCrossover(kiddo, papa, crossover_type, crossover_rate);
// Apply mutation
this->Mutate(kiddo, mutation_rate);
@ -115,7 +113,12 @@ namespace BitEvolver
}
//
void Breeder::ApplyCrossover(std::shared_ptr<Chromosome> kiddo, std::shared_ptr<Chromosome> parent, double crossover_rate)
void Breeder::ApplyCrossover(
std::shared_ptr<Chromosome> kiddo,
std::shared_ptr<Chromosome> parent,
Enums::CrossoverType crossover_type,
double crossover_rate
)
{
//
int
@ -124,7 +127,12 @@ namespace BitEvolver
i
;
//
// Only proceed if using sexual crossover
if (crossover_type != Enums::CrossoverType::Sexual) {
return;
}
// For now, don't crossover unless the bit lengths are identical
bits_count = kiddo->GetBitCount();
if ( parent->GetBitCount() != bits_count ) {
throw std::runtime_error("Breeder::ApplyCrossover() - Parent incompatible with Kiddo (bit lengths don't match)");