Video version

Cargo.lock

@@ -43,7 +43,6 @@ dependencies = [
  "colornamer",
  "itertools",
  "rand",
- "serde",
 ]
 
 [[package]]
@@ -141,26 +140,6 @@ dependencies = [
  "getrandom",
 ]
 
-[[package]]
-name = "serde"
-version = "1.0.219"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
-dependencies = [
- "serde_derive",
-]
-
-[[package]]
-name = "serde_derive"
-version = "1.0.219"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "syn"
 version = "2.0.100"

Cargo.toml

@@ -7,4 +7,3 @@ edition = "2021"
 colornamer = "1.0.1"
 itertools = "0.14.0"
 rand = "0.9.1"
-serde = {version = "1.0.219", features=["derive"]}

src/choice_function.rs

@@ -1,4 +1,4 @@
-use rand::{rng, seq::IndexedRandom, Rng};
+use rand::{rng, seq::IndexedRandom};
 
 #[derive(Clone, Copy)]
 pub enum ChoiceFunction {
@@ -9,6 +9,9 @@ pub enum ChoiceFunction {
 
 impl ChoiceFunction {
     pub fn choose<'a, T>(&self, xs: &'a [T]) -> &'a T {
+        if xs.len() == 0 {
+            panic!("requires at least one item")
+        }
         match self {
             ChoiceFunction::First => &xs[0],
             ChoiceFunction::Last => &xs[xs.len() - 1],

src/creature/coloration.rs

@@ -27,12 +27,12 @@ impl Genetic for Coloration {
     }
 }
 
-#[derive(Clone, Copy, Default)]
+#[derive(Clone, Default)]
 pub struct Color {
     pub r: Stat<'.', '!', 0, 8>,
     pub g: Stat<'.', '!', 0, 8>,
     pub b: Stat<'.', '!', 0, 8>,
-    pub pallor: Stat<'.', '!', 0, 8>,
+    pub p: Stat<'.', '!', 0, 8>,
 }
 
 impl Genetic for Color {
@@ -40,21 +40,25 @@ impl Genetic for Color {
         self.r.transcribe(t.nest("r"));
         self.g.transcribe(t.nest("g"));
         self.b.transcribe(t.nest("b"));
-        self.pallor.transcribe(t.nest("pallor"));
+        self.p.transcribe(t.nest("p"));
     }
 }
 
 impl Color {
-    fn to_name(&self) -> String {
+    pub fn to_rgb(&self) -> (u8, u8, u8) {
         let mut r = self.r.value() * 255 / 8;
         let mut g = self.g.value() * 255 / 8;
         let mut b = self.b.value() * 255 / 8;
-        let pallor_amt = self.pallor.value() * 255 / 8;
-        r = (r * (255 - pallor_amt) + 255 * pallor_amt) / 255;
-        g = (g * (255 - pallor_amt) + 255 * pallor_amt) / 255;
-        b = (b * (255 - pallor_amt) + 255 * pallor_amt) / 255;
-        // let colornamer = ColorNamer::new(Colors::NTC);
-        let colornamer = ColorNamer::new(Colors::X11);
+        let p = self.p.value() * 255 / 8;
+
+        r = (r * (255 - p) + 0xd0 * p) / 255;
+        g = (g * (255 - p) + 0xd0 * p) / 255;
+        b = (b * (255 - p) + 0xd8 * p) / 255;
+        return (r as u8, g as u8, b as u8);
+    }
+    pub fn to_name(&self) -> String {
+        let colornamer = ColorNamer::new(Colors::NTC);
+        let (r, g, b) = self.to_rgb();
         let hex_color = format!("#{:02x}{:02x}{:02x}", r, g, b);
         return format!(
             "{} ({})",

src/creature/gender.rs

@@ -0,0 +1,28 @@
+use crate::genetics::{Genetic, Transcriber};
+
+#[derive(Clone, Copy, Debug, Default)]
+pub enum Gender {
+    Male,
+    Female,
+    #[default]
+    Other,
+}
+
+impl Genetic for Gender {
+    fn transcribe(&mut self, mut t: Transcriber) {
+        t.express(
+            self,
+            &[
+                ('m', Gender::Male),
+                ('f', Gender::Female),
+                ('O', Gender::Other),
+            ],
+        );
+    }
+}
+
+impl Gender {
+    pub fn profile(&self) -> String {
+        format!("Gender: {:?}\n", self)
+    }
+}

src/creature/mod.rs

@@ -1,62 +1,47 @@
 mod coloration;
+mod gender;
+mod phenotype;
 mod species;
 mod stats;
 
-use coloration::Coloration;
-use species::Parts;
-use stats::Stats;
+use phenotype::Phenotype;
 
-use crate::genetics::{Genetic, Genotype, Transcriber};
+use crate::{choice_function::ChoiceFunction, genetics::Genotype};
 
-#[derive(Clone, Debug)]
+#[derive(Clone)]
 pub struct Creature {
-    // pub name: String,
-    pub genotype: Genotype,
+    genotype: Genotype,
 }
 
 impl Creature {
-    pub fn profile(&self) -> String {
-        let phenotype: Phenotype = self.genotype.load();
+    pub fn generate(choice_function: ChoiceFunction) -> Self {
+        Creature {
+            genotype: Genotype::generate::<Phenotype>(choice_function),
+        }
+    }
 
-        let mut profile = phenotype.profile(); // format!("Name: {}\n{}", self.name, phenotype.profile());
+    pub fn breed(&self, choice_function: ChoiceFunction, other: &Creature) -> Creature {
+        return Creature {
+            genotype: self.genotype.breed(choice_function, &other.genotype),
+        };
+    }
+
+    pub fn phenotype(&self) -> Phenotype {
+        let phenotype: Phenotype = self.genotype.load();
+        return phenotype;
+    }
+
+    pub fn profile(&self) -> String {
+        let phenotype: Phenotype = self.phenotype();
+        let mut profile = phenotype.profile();
+        if true {
             profile.push_str("\nGenome:\n");
+
             for (chromosome, (lhs, rhs)) in self.genotype.chromosomes.iter() {
                 profile.push_str(&format!("  {}[l]: {}\n", chromosome, lhs));
                 profile.push_str(&format!("  {}[r]: {}\n", chromosome, rhs));
             }
+        }
         return profile;
     }
-
-    pub fn breed(&self, other: &Creature) -> Creature {
-        return Creature {
-            // name: String::from("Pyrex"),
-            genotype: self.genotype.breed(&other.genotype),
-        };
-    }
-}
-
-#[derive(Default)]
-pub struct Phenotype {
-    pub stats: Stats,
-    pub coloration: Coloration,
-    pub parts: Parts,
-}
-
-impl Phenotype {
-    pub fn profile(&self) -> String {
-        format!(
-            "{}{}{}",
-            self.stats.profile(),
-            self.coloration.profile(),
-            self.parts.profile()
-        )
-    }
-}
-
-impl Genetic for Phenotype {
-    fn transcribe(&mut self, t: Transcriber) {
-        self.stats.transcribe(t.nest("stats"));
-        self.coloration.transcribe(t.nest("coloration"));
-        self.parts.transcribe(t.nest("parts"));
-    }
 }

src/creature/phenotype.rs

@@ -0,0 +1,32 @@
+use crate::genetics::{Genetic, Transcriber};
+
+use super::{coloration::Coloration, gender::Gender, species::Parts, stats::Stats};
+
+#[derive(Default)]
+pub struct Phenotype {
+    pub gender: Gender,
+    pub parts: Parts,
+    pub stats: Stats,
+    pub coloration: Coloration,
+}
+
+impl Phenotype {
+    pub fn profile(&self) -> String {
+        format!(
+            "{}{}{}{}",
+            self.gender.profile(),
+            self.parts.profile(),
+            self.stats.profile(),
+            self.coloration.profile()
+        )
+    }
+}
+
+impl Genetic for Phenotype {
+    fn transcribe(&mut self, t: Transcriber) {
+        self.gender.transcribe(t.nest("gender"));
+        self.parts.transcribe(t.nest("parts"));
+        self.stats.transcribe(t.nest("stats"));
+        self.coloration.transcribe(t.nest("coloration"));
+    }
+}

src/creature/species.rs

@@ -43,14 +43,6 @@ impl Parts {
     }
 }
 
-impl Genetic for Parts {
-    fn transcribe(&mut self, t: Transcriber) {
-        self.stare.transcribe(t.nest("stare"));
-        self.fangs.transcribe(t.nest("fangs"));
-        self.wings.transcribe(t.nest("wings"));
-    }
-}
-
 #[derive(Clone, Copy, Debug)]
 pub enum Species {
     Bunny,
@@ -62,3 +54,11 @@ pub enum Species {
     Snake,
     Bat,
 }
+
+impl Genetic for Parts {
+    fn transcribe(&mut self, t: Transcriber) {
+        self.stare.transcribe(t.nest("stare"));
+        self.fangs.transcribe(t.nest("fangs"));
+        self.wings.transcribe(t.nest("wings"));
+    }
+}

src/creature/stats.rs

@@ -51,7 +51,7 @@ impl<const OFF: char, const ON: char, const MIN: usize, const RANGE: usize> Gene
 {
     fn transcribe(&mut self, mut t: Transcriber) {
         for v in self.values.iter_mut() {
-            t.express(v, &[(OFF, false), (ON, true)]);
+            t.express(v, &[(OFF, false), (ON, true)])
         }
     }
 }

src/genetics/mod.rs

@@ -0,0 +1,59 @@
+mod transcriber;
+
+use std::collections::{BTreeMap, HashSet};
+
+use itertools::{EitherOrBoth, Itertools};
+pub use transcriber::Transcriber;
+
+use crate::choice_function::{self, ChoiceFunction};
+
+#[derive(Clone, Debug)]
+pub struct Genotype {
+    pub chromosomes: BTreeMap<String, Chromosomes>,
+}
+
+type Chromosomes = (String, String);
+
+pub trait Genetic: Default {
+    fn transcribe(&mut self, t: Transcriber);
+}
+
+fn merge(choice_function: ChoiceFunction, one: &str, two: &str) -> String {
+    let mut results = String::new();
+    for pair in one.chars().zip_longest(two.chars()) {
+        results.push(match pair {
+            EitherOrBoth::Both(l, r) => *choice_function.choose(&[l, r]),
+            EitherOrBoth::Left(l) => l,
+            EitherOrBoth::Right(r) => r,
+        });
+    }
+    results
+}
+
+impl Genotype {
+    pub fn breed(&self, choice_function: ChoiceFunction, other: &Genotype) -> Genotype {
+        let mut chromosomes: HashSet<String> = HashSet::new();
+        chromosomes.extend(self.chromosomes.keys().cloned());
+        chromosomes.extend(other.chromosomes.keys().cloned());
+
+        let mut result: BTreeMap<String, Chromosomes> = BTreeMap::new();
+        let placeholder = (String::new(), String::new());
+
+        for k in chromosomes {
+            let mine = self.chromosomes.get(&k).unwrap_or(&placeholder);
+            let theirs = self.chromosomes.get(&k).unwrap_or(&placeholder);
+
+            /*
+            let mine_merged = merge(choice_function, &mine.0, &mine.1);
+            let theirs_merged = merge(choice_function, &theirs.0, &theirs.1);
+            result.insert(k, (mine_merged, theirs_merged));
+            */
+            let my_choice = (*choice_function.choose(&[&mine.0, &mine.1])).clone();
+            let their_choice = (*choice_function.choose(&[&theirs.0, &theirs.1])).clone();
+            result.insert(k, (my_choice, their_choice));
+        }
+        return Genotype {
+            chromosomes: result,
+        };
+    }
+}

src/genetics/transcriber.rs

@@ -1,74 +1,29 @@
-use std::{
-    cell::RefCell,
-    collections::{BTreeMap, HashSet},
-    rc::Rc,
-};
-
-use itertools::{EitherOrBoth, Itertools};
-use rand::{seq::IndexedRandom, RngCore};
-use serde::{Deserialize, Serialize};
+use std::{cell::RefCell, collections::BTreeMap};
 
 use crate::choice_function::ChoiceFunction;
 
-#[derive(Clone, Deserialize, Serialize, Debug)]
-pub struct Genotype {
-    pub chromosomes: BTreeMap<String, Chromosomes>,
-}
-type Chromosomes = (String, String);
-
-fn merge(rng: &mut impl RngCore, one: &str, two: &str) -> String {
-    let mut results = String::new();
-    for pair in one.chars().zip_longest(two.chars()) {
-        results.push(match pair {
-            EitherOrBoth::Both(l, r) => *[l, r].choose(rng).unwrap(),
-            EitherOrBoth::Left(l) => l,
-            EitherOrBoth::Right(r) => r,
-        })
-    }
-    return results;
-}
+use super::{Chromosomes, Genetic, Genotype};
 
 impl Genotype {
-    pub fn breed(&self, other: &Genotype) -> Genotype {
-        let mut rng = rand::rng();
-        let mut chromosomes: HashSet<String> = HashSet::new();
-        chromosomes.extend(self.chromosomes.keys().cloned());
-        chromosomes.extend(other.chromosomes.keys().cloned());
-
-        let mut result: BTreeMap<String, Chromosomes> = BTreeMap::new();
-        let placeholder = (String::new(), String::new());
-        for k in chromosomes {
-            let mine = self.chromosomes.get(&k).unwrap_or(&placeholder);
-            let theirs = self.chromosomes.get(&k).unwrap_or(&placeholder);
-
-            let mine_merged = merge(&mut rng, &mine.0, &mine.1);
-            let theirs_merged = merge(&mut rng, &theirs.0, &theirs.1);
-            result.insert(k, (mine_merged, theirs_merged));
-        }
-        return Genotype {
-            chromosomes: result,
-        };
-    }
-
     pub fn generate<T: Genetic>(choice_function: ChoiceFunction) -> Self {
         let root = RootTranscriber::Generator(Generator {
             choice_function,
             progress: BTreeMap::new(),
         });
-        let root_cell = Rc::new(RefCell::new(root));
+        let root_cell = RefCell::new(root);
         let transcriber = Transcriber {
-            root: root_cell.clone(),
+            root: &root_cell,
             chromosome: String::from("base"),
         };
         let mut base = T::default();
         base.transcribe(transcriber);
-        match &*root_cell.borrow() {
+        match root_cell.into_inner() {
             RootTranscriber::Generator(generator) => {
-                let chromosomes = generator.progress.clone();
+                let chromosomes = generator.progress;
                 return Genotype { chromosomes };
             }
-            _ => panic!("a generator should not able to turn into a loader"),
-        };
+            _ => panic!("a generator should not be able to turn into anything else"),
+        }
     }
 
     pub fn load<T: Genetic>(&self) -> T {
@@ -76,13 +31,14 @@ impl Genotype {
         for (key, (lhs, rhs)) in self.chromosomes.iter() {
             progress.insert(
                 key.clone(),
+                // as a note: we could just store the character iterator!
                 (0, Vec::from_iter(lhs.chars()), Vec::from_iter(rhs.chars())),
             );
         }
         let root = RootTranscriber::Loader(Loader { progress });
-        let root_cell = Rc::new(RefCell::new(root));
+        let root_cell = RefCell::new(root);
         let transcriber = Transcriber {
-            root: root_cell.clone(),
+            root: &root_cell,
             chromosome: String::from("base"),
         };
         let mut base = T::default();
@@ -104,21 +60,20 @@ impl RootTranscriber {
         possibilities: &[(char, T)],
     ) {
         match self {
-            RootTranscriber::Generator(generator) => {
-                generator.express(chromosome, field, possibilities)
+            RootTranscriber::Generator(generator) => generator.express(chromosome, possibilities),
+            RootTranscriber::Loader(loader) => {
+                loader.express(chromosome, field, possibilities);
             }
-            RootTranscriber::Loader(loader) => loader.express(chromosome, field, possibilities),
         }
     }
 }
 
-#[derive(Clone)]
-pub struct Transcriber {
-    root: Rc<RefCell<RootTranscriber>>,
+pub struct Transcriber<'r> {
+    root: &'r RefCell<RootTranscriber>,
     chromosome: String,
 }
 
-impl Transcriber {
+impl Transcriber<'_> {
     pub fn express<T: Clone>(&mut self, field: &mut T, possibilities: &[(char, T)]) {
         self.root
             .borrow_mut()
@@ -127,33 +82,28 @@ impl Transcriber {
 
     pub fn nest(&self, suffix: &str) -> Transcriber {
         return Transcriber {
-            root: self.root.clone(),
+            root: self.root,
             chromosome: format!("{}.{}", self.chromosome, suffix),
         };
     }
 }
-
-pub trait Genetic: Default {
-    fn transcribe(&mut self, t: Transcriber);
-}
-
 struct Generator {
     choice_function: ChoiceFunction,
     progress: BTreeMap<String, Chromosomes>,
 }
 
 impl Generator {
-    pub fn express<T>(&mut self, chromosome: &str, _field: &mut T, possibilities: &[(char, T)]) {
-        let lhs = self.choice_function.choose(possibilities).0;
-        let rhs = self.choice_function.choose(possibilities).0;
+    pub fn express<T>(&mut self, chromosome: &str, possibilities: &[(char, T)]) {
+        let lhs = self.choice_function.choose(possibilities);
+        let rhs = self.choice_function.choose(possibilities);
 
         let progress = self
             .progress
-            .entry(chromosome.to_string())
+            .entry(chromosome.to_string()) // SLOW!
             .or_insert((String::new(), String::new()));
 
-        progress.0.push(lhs);
-        progress.1.push(rhs);
+        progress.0.push(lhs.0);
+        progress.1.push(rhs.0);
     }
 }
 
@@ -175,7 +125,7 @@ impl Loader {
             *ix += 1;
         }
 
-        let mut expressed = lhs; // lhs wins if not dominated
+        let mut expressed = lhs;
         if dominance(rhs) > dominance(lhs) {
             expressed = rhs;
         }

src/main.rs

@@ -1,53 +1,48 @@
 use choice_function::ChoiceFunction;
-use creature::{Creature, Phenotype};
-use genetics::Genotype;
+use creature::Creature;
 use rand::{rng, seq::SliceRandom};
 
 mod choice_function;
 mod creature;
 mod genetics;
 
-fn generate_creature() -> Creature {
-    let genotype: Genotype = Genotype::generate::<Phenotype>(ChoiceFunction::Random);
-    let creature = Creature {
-        // name: String::from("Pyrex"),
-        genotype,
-    };
-    return creature;
-}
-
 fn evolve() {
+    let cf = ChoiceFunction::Random;
     const N_ITERATIONS: usize = 200;
     const N_CREATURES: usize = 100;
-    const N_SURVIVORS: usize = 90;
+    const N_RANDOMS: usize = 50;
+    const N_SURVIVORS: usize = 40;
 
     let mut pool = vec![];
     for _ in 0..N_CREATURES {
-        pool.push(generate_creature());
+        pool.push(Creature::generate(cf));
     }
 
     for iteration in 0..N_ITERATIONS {
         report(iteration, &pool);
 
-        // kill N creatures
-        let mut survivors = pool.clone();
+        let mut survivors = pool;
         survivors.sort_by(|x, y| fitness(x).partial_cmp(&fitness(y)).unwrap());
         survivors.reverse();
         survivors.drain(N_SURVIVORS..N_CREATURES);
 
-        let mut pool2 = vec![];
+        for _ in 0..N_RANDOMS {
+            survivors.push(Creature::generate(cf));
+        }
+
         let mut survivors_queue = vec![];
         while survivors_queue.len() < N_CREATURES * 2 {
             survivors_queue.extend(survivors.clone());
         }
         survivors_queue.shuffle(&mut rng());
 
+        let mut offspring = vec![];
         for _ in 0..N_CREATURES {
             let lhs = survivors_queue.pop().unwrap();
             let rhs = survivors_queue.pop().unwrap();
-            pool2.push(lhs.breed(&rhs));
+            offspring.push(lhs.breed(cf, &rhs));
         }
-        pool = pool2;
+        pool = offspring;
     }
 }
 
@@ -58,13 +53,10 @@ fn report(iteration: usize, pool: &[Creature]) {
 }
 
 fn fitness(creature: &Creature) -> f64 {
-    let phenotype: Phenotype = creature.genotype.load();
+    let phenotype = creature.phenotype();
     let mut value = 0.0;
-    if phenotype.parts.has_wings() {
-        value += 0.5;
-    }
-    value -= phenotype.coloration.body.r.value() as f64 / 4.0;
     value += (phenotype.stats.iq.value() as f64) / 10.0;
+    value += (phenotype.stats.eq.value() as f64) / 10.0;
 
     return value;
 }