mutate.c

#include "a4.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

void mutate(Individual *individual, double rate) {
  int n = individual->image.width * individual->image.height;
  int max_color = individual->image.max_color;
  int num = (int)(rate / 100 * n);
  for (int i = 0; i < num; i++) {
    int random = rand() % n;
    individual->image.data[random].r =
        (unsigned char)(rand() % (max_color + 1));
    individual->image.data[random].g =
        (unsigned char)(rand() % (max_color + 1));
    individual->image.data[random].b =
        (unsigned char)(rand() % (max_color + 1));
  }
}
void mutate_population(Individual *individual, int population_size,
                       double rate) {
  for (int i = population_size / 4; i < population_size; i++) {
    mutate(&(individual[i]), rate);
  }
}