@alenaksu/neatjs/dist-src/neat/Organism.js

NEAT (Neuroevolution of Augmenting Topologies) implementation in JavaScript

import { Genome } from './Genome';
import Network from '../network/Network';
import { ascending } from '../utils';
/**
 * Organisms are Genomes and Networks with fitness informations
 * i.e. The genotype and phenotype together
 */
export class Organism extends Genome {
    constructor(
    // innovation: Iterator<number>,
    fitness = 0, generation = 0) {
        super();
        /**
         * A measure of fitness before adjustment
         */
        this.originalFitness = 0;
        /**
         * Mark for killing
         */
        this.kill = false;
        /**
         * Generation in which Organism is from
         */
        this.generation = 0;
        /**
         * Number of children this Organism may have
         */
        this.expectedOffspring = 0;
        this.fitness = fitness;
        this.generation = generation;
    }
    copy(fitness = 0, generation = 0) {
        let clone = super.copy();
        clone.fitness = fitness;
        clone.originalFitness = this.originalFitness;
        clone.generation = generation;
        return clone;
    }
    getNetwork() {
        if (!this.network) {
            const nodes = Array.from(this.nodes.values()).map(({ type, id }) => ({
                type,
                id
            }));
            const connections = Array.from(this.connections.values())
                .sort(ascending((i) => i.innovation))
                .map(({ from, to, weight, enabled }) => ({
                from: from.id,
                to: to.id,
                weight: weight,
                enabled: enabled
            }));
            this.network = new Network(nodes, connections);
        }
        return this.network;
    }
}
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