radiate_rust/engines/alterers/mutators/
swap_mutator.rs

1use rand::Rng;
2
3use crate::engines::genome::chromosome::Chromosome;
4use crate::engines::genome::genes::gene::Gene;
5
6use super::mutate::Mutate;
7
8pub struct SwapMutator {
9    rate: f32,
10}
11
12impl SwapMutator {
13    pub fn new(rate: f32) -> Self {
14        Self { rate }
15    }
16}
17
18impl<G: Gene<G, A>, A> Mutate<G, A> for SwapMutator {
19
20    fn mutate_rate(&self) -> f32 {
21        self.rate
22    }
23    
24    #[inline]
25    fn mutate_chromosome(&self, chromosome: &mut Chromosome<G, A>, range: i32) -> i32 {
26        let mut random = rand::thread_rng();
27        let mut mutations = 0;
28
29        for i in 0..chromosome.len() {
30            if rand::random::<i32>() > range {
31                let swap_index = random.gen_range(0..chromosome.len());
32
33                if swap_index == i {
34                    continue;
35                }
36
37                mutations += 1;
38
39                let curr_gene = chromosome.get_gene(i);
40                let swap_gene = chromosome.get_gene(swap_index);
41
42                chromosome.set_gene(i, curr_gene.from_allele(&swap_gene.allele()));
43            }
44        }
45
46        mutations
47    }
48}