VR

BallSpawner

using UnityEngine;

public class BallSpawner : MonoBehaviour
{
    [SerializeField] private GameObject prefabToSpawn;

    private GameObject spawnedObject;

    private void Start()
    {
        prefabToSpawn.SetActive(false);
    }

    public void SpawnNewOne()
    {
        if (spawnedObject != null)
        {
            Destroy(spawnedObject);
        }

        spawnedObject = Instantiate(prefabToSpawn, transform.position, Quaternion.identity);
        spawnedObject.SetActive(true);
    }
}

DuckManager

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

public class DuckManager : MonoBehaviour
{
    // [SerializeField] private Transform[] possibleDuckSpawns;
    [SerializeField] private GameObject[] duckVariants;

    void Start()
    {
        SpawnDuck();
    }

    public void SpawnDuck()
    {
        // Transform spawnPos = possibleDuckSpawns[Random.Range(0, possibleDuckSpawns.Length)];
        GameObject duckVariant = duckVariants[Random.Range(0, duckVariants.Length)];
        duckVariant.transform.position = transform.position;
        // y, z axes are inverted?
        duckVariant.transform.Translate(new Vector3(Random.Range(-3.0f, 3.0f), Random.Range(-3.0f, 3.0f), 0.0f));
        // duckVariant.transform.Translate(Random.Range(-1.0f, 1.0f), 0.0f, Random.Range(-1.0f, 1.0f));
        // Debug.Log("Spawning duck at rotation: " + duckVariant.transform.localRotation);
        duckVariant.transform.localRotation = Quaternion.AngleAxis(Random.Range(0, 360), Vector3.forward);
        GameObject newObject = Instantiate(duckVariant, transform);
        newObject.SetActive(true);
    }
}

DestroyOnCollideWithTag

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

public class DestroyOnCollideWithTag : MonoBehaviour
{
    [SerializeField] private string ballTag;
    [SerializeField] private UnityEvent onDestroy;

    private void OnCollisionEnter(Collision collision)
    {
        if (collision.collider.CompareTag(ballTag))
        {
            onDestroy.Invoke();
            Destroy(gameObject);
        }
    }
}

NPCBehavior

using Unity.XR.CoreUtils;
using UnityEngine;

public class NPCBehavior : MonoBehaviour
{
    private Animator npcAnimator;
    private GameObject pondTelepotationArea;
    private GameObject plane;
    private bool isPondActivated = true;

    void Start()
    {
        // ground = GameObject.Find("Ground");
        pondTelepotationArea = GameObject.Find("MovementZones").gameObject;
        plane = GameObject.Find("GravelBakePlane_-0.05").gameObject;
        npcAnimator = GetComponent<Animator>();
    }

    public void ActivateNPC()
    {
        // Debug.Log("NPC Activated");
        npcAnimator.SetBool("IsActivated", true);

        isPondActivated = !isPondActivated;
        if (isPondActivated)
        {
            Debug.Log("isPondActivated: " + isPondActivated);
            // Activate the water and deactivate the rocks
            plane.transform.GetChild(0).gameObject.SetActive(true);
            plane.transform.GetChild(1).gameObject.SetActive(false);
            pondTelepotationArea.transform.GetChild(2).gameObject.SetActive(false);
        }
        else
        {
            Debug.Log("isPondActivated: " + isPondActivated);
            // Deactivate the water and activate the rocks
            plane.transform.GetChild(0).gameObject.SetActive(false);
            plane.transform.GetChild(1).gameObject.SetActive(true);
            pondTelepotationArea.transform.GetChild(2).gameObject.SetActive(true);
        }
    }

    public void DeActivateNPC()
    {
        // Debug.Log("NPC Deactivated");
        npcAnimator.SetBool("IsActivated", false);
    }
}

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External Resources