【AIプログラミング検証】3D生態シミュレーション【ChatGPT 4o】

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GameManager : MonoBehaviour
{
    public GameObject animalPrefab;
    public GameObject foodPrefab;
    public int initialAnimalCount = 10;
    public int foodSpawnRate = 5; // 何秒ごとに食料を生成するか
    public int maxFood = 20;
    public Vector2 fieldSize = new Vector2(20, 20);

    private List<GameObject> animals = new List<GameObject>();
    private List<GameObject> foods = new List<GameObject>();

    void Start()
    {
        // 初期エージェントを生成
        for (int i = 0; i < initialAnimalCount; i++)
        {
            SpawnAnimal();
        }

        // 食料を定期的に生成
        StartCoroutine(SpawnFoodRoutine());
    }

    void Update()
    {
        // エージェントが全滅したらシミュレーション終了
        if (animals.Count == 0)
        {
            Debug.Log("Simulation Ended: All animals have died.");
            StopAllCoroutines();
        }
    }

    void SpawnAnimal()
    {
        Vector3 position = new Vector3(Random.Range(-fieldSize.x, fieldSize.x), 1, Random.Range(-fieldSize.y, fieldSize.y));
        GameObject animal = Instantiate(animalPrefab, position, Quaternion.identity);
        animals.Add(animal);
    }

    IEnumerator SpawnFoodRoutine()
    {
        while (true)
        {
            yield return new WaitForSeconds(foodSpawnRate);
            if (foods.Count < maxFood)
            {
                SpawnFood();
            }
        }
    }

    void SpawnFood()
    {
        Vector3 position = new Vector3(Random.Range(-fieldSize.x, fieldSize.x), 0.5f, Random.Range(-fieldSize.y, fieldSize.y));
        GameObject food = Instantiate(foodPrefab, position, Quaternion.identity);
        foods.Add(food);
    }

    public void RemoveAnimal(GameObject animal)
    {
        animals.Remove(animal);
    }

    public void RemoveFood(GameObject food)
    {
        foods.Remove(food);
    }
}

using System.Collections;
using UnityEngine;
using UnityEngine.AI;

public class Animal : MonoBehaviour
{
    public float energy = 100f;
    public float energyLossRate = 1f;
    public float energyGain = 30f;
    public float reproductionThreshold = 120f;
    public float detectionRange = 10f;

    private NavMeshAgent agent;
    private GameManager gameManager;

    void Start()
    {
        agent = GetComponent<NavMeshAgent>();
        gameManager = FindObjectOfType<GameManager>();
        StartCoroutine(BehaviorLoop());
    }

    IEnumerator BehaviorLoop()
    {
        while (energy > 0)
        {
            // 食料を探す
            GameObject food = FindNearestFood();
            if (food != null)
            {
                agent.SetDestination(food.transform.position);
                while (Vector3.Distance(transform.position, food.transform.position) > 1f)
                {
                    energy -= energyLossRate * Time.deltaTime;
                    yield return null;
                }
                EatFood(food);
            }
            else
            {
                // ランダム移動
                Vector3 randomPosition = new Vector3(Random.Range(-10, 10), 1, Random.Range(-10, 10));
                agent.SetDestination(randomPosition);
                yield return new WaitForSeconds(3);
            }

            // 繁殖チェック
            if (energy >= reproductionThreshold)
            {
                Reproduce();
            }

            // 死亡チェック
            if (energy <= 0)
            {
                Die();
            }
        }
    }

    GameObject FindNearestFood()
    {
        GameObject[] foods = GameObject.FindGameObjectsWithTag("Food");
        GameObject nearestFood = null;
        float minDistance = detectionRange;

        foreach (GameObject food in foods)
        {
            float distance = Vector3.Distance(transform.position, food.transform.position);
            if (distance < minDistance)
            {
                minDistance = distance;
                nearestFood = food;
            }
        }

        return nearestFood;
    }

    void EatFood(GameObject food)
    {
        energy += energyGain;
        gameManager.RemoveFood(food);
        Destroy(food);
    }

    void Reproduce()
    {
        energy /= 2; // 親のエネルギーを半分にする
        gameManager.SendMessage("SpawnAnimal");
    }

    void Die()
    {
        gameManager.RemoveAnimal(gameObject);
        Destroy(gameObject);
    }
}

using UnityEngine;

public class Food : MonoBehaviour
{
    void Start()
    {
        gameObject.tag = "Food";
    }
}