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fix: 🐛 non-sticking to bounds

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This commit is contained in:
Ahmet Kaan GÜMÜŞ 2024-11-20 00:20:40 +03:00
parent f0675e4bdf
commit 6cbba58e63
2 changed files with 41 additions and 6 deletions
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37
artificial_bee_colony/src/bee.rs
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@ -8,6 +8,8 @@ impl Bee {
food_sources: &mut [FoodSource],
index: usize,
decision_variable_count: usize,
upper_bound: f64,
lower_bound: f64,
) {
let mut different_food_source_index = rand::thread_rng().gen_range(0..food_sources.len());
while different_food_source_index == index {
@ -16,11 +18,17 @@ impl Bee {
let selected_coordinate_index = rand::thread_rng().gen_range(0..decision_variable_count);
let randomness = rand::thread_rng().gen_range(-1.0..=1.0);
let candidate_one_index = food_sources[index].coordinates[selected_coordinate_index]
let mut candidate_one_index = food_sources[index].coordinates[selected_coordinate_index]
+ randomness
* (food_sources[index].coordinates[selected_coordinate_index]
- food_sources[different_food_source_index].coordinates
[selected_coordinate_index]);
if candidate_one_index > upper_bound {
candidate_one_index = upper_bound;
}
if candidate_one_index < lower_bound {
candidate_one_index = lower_bound;
}
let mut candidate_coordinates = food_sources[index].coordinates.clone();
candidate_coordinates[selected_coordinate_index] = candidate_one_index;
let candidate = FoodSource::get(candidate_coordinates);
@ -36,10 +44,18 @@ impl Bee {
index: usize,
total_fitness: f64,
decision_variable_count: usize,
upper_bound: f64,
lower_bound: f64,
) {
let fitness_for_index = food_sources[index].fitness;
if fitness_for_index / total_fitness <= rand::thread_rng().gen_range(0.0..=1.0) {
Self::worker_bee(food_sources, index, decision_variable_count);
Self::worker_bee(
food_sources,
index,
decision_variable_count,
upper_bound,
lower_bound,
);
}
}
@ -54,9 +70,20 @@ impl Bee {
if food_sources[most_tried_index].try_counter > limit {
let mut coordinates_for_new = vec![];
for _ in 0..decision_variable_count {
let random = lower_bound
+ rand::thread_rng().gen_range(0.0..=1.0) * (upper_bound - lower_bound);
coordinates_for_new.push(random);
let random = if upper_bound * lower_bound > 0.0 {
lower_bound
+ rand::thread_rng().gen_range(0.0..=1.0) * (upper_bound - lower_bound)
} else {
lower_bound
+ rand::thread_rng().gen_range(0.0..=1.0) * (upper_bound + lower_bound)
};
if random > upper_bound {
coordinates_for_new.push(upper_bound);
} else if random < lower_bound {
coordinates_for_new.push(lower_bound);
} else {
coordinates_for_new.push(random);
}
}
let new_food_source = FoodSource::get(coordinates_for_new);
food_sources[most_tried_index] = new_food_source;