void mutate() {
assert(cfg);
size_t action = 0; // default = modify
if (cfg->mutateSize) {
action =
chooseAction(std::vector<T>{{cfg->modifyProba, cfg->addProba, cfg->eraseProba}},
getRandomEngine());
}
std::uniform_real_distribution<T> d(0, 1); // TODO replace by generic rand
std::uniform_int_distribution<int> dInt(0, values.size() - 1);
switch (action) {
case 0:
// modify
values[dInt(getRandomEngine())] = d(getRandomEngine());
break;
case 1:
// add
values.push_back(d(getRandomEngine()));
break;
case 2:
default:
// erase
values.erase(values.begin() + dInt(getRandomEngine()));
break;
}
}
static VectorDNA random(Config* c) {
assert(c);
VectorDNA res(c);
res.values.resize(c->initialSize);
std::uniform_real_distribution<T> d(0, 1); // TODO replace by generic rand
for (size_t i = 0; i < c->initialSize; ++i) res.values[i] = d(getRandomEngine());
return res;
}
inline IntT getRandomInteger(IntT Min = 0,
IntT Max = std::numeric_limits<IntT>::max()) {
std::uniform_int_distribution<IntT> dist(Min, Max);
return dist(getRandomEngine());
}
inline char getRandomChar() {
std::uniform_int_distribution<> LettersDist(0, LettersSize-1);
return Letters[LettersDist(getRandomEngine())];
}
RandomRealGenerator<RealType>::RandomRealGenerator(
RealType min, RealType max)
: m_Engine(getRandomEngine()),
m_Dist(min, std::nextafter(max, std::numeric_limits<RealType>::max()))
{}
RandomIntGenerator<IntType>::RandomIntGenerator(
std::default_random_engine& randomEngine,
IntType min, IntType max)
: m_Engine(getRandomEngine()),
m_Dist(min, max)
{}
RandomIntGenerator<IntType>::RandomIntGenerator(
IntType min, IntType max)
: m_Engine(getRandomEngine()),
m_Dist(min, max)
{}
inline IntT getRandomInteger() {
std::uniform_int_distribution<IntT> dist;
return dist(getRandomEngine());
}
double Utils::getRandNumber(double min, double max) {
std::mt19937 mt = getRandomEngine();
std::uniform_real_distribution<double> dist(min, max);
return dist(mt);
}
float Utils::getRandNumber(float min, float max) {
std::mt19937 mt = getRandomEngine();
std::uniform_real_distribution<float> dist(min, max);
return dist(mt);
}
