Unity 6.3 LTS｜3D的当てゲームを作ろう⑥ Robot Sphereで敵をモデル化しよう

using UnityEngine;
using UnityEngine.InputSystem;
using TMPro;

public class ShootCheck : MonoBehaviour
{
    Camera cameraComponent;

    public TMP_Text scoreText;
    public TMP_Text timerText;
    public float timeLimit = 30f;

    int score = 0;
    int remainingTargets;
    float timeRemaining;
    bool gameEnded;

    void Start()
    {
        cameraComponent = GetComponent<Camera>();
        scoreText.text = "SCORE: " + score;

        remainingTargets =
            GameObject.FindGameObjectsWithTag("Target").Length;

        timeRemaining = timeLimit;
        timerText.text =
            "TIME: " + Mathf.CeilToInt(timeRemaining);
    }

    void Update()
    {
        if (gameEnded)
        {
            return;
        }

        timeRemaining -= Time.deltaTime;

        if (timeRemaining <= 0f)
        {
            timeRemaining = 0f;
            timerText.text = "TIME: 0";
            scoreText.text = "TIME UP!\nSCORE: " + score;
            gameEnded = true;
            return;
        }

        timerText.text =
            "TIME: " + Mathf.CeilToInt(timeRemaining);

        if (Mouse.current == null ||
            !Mouse.current.leftButton.wasPressedThisFrame)
        {
            return;
        }

        Ray ray = cameraComponent.ViewportPointToRay(
            new Vector3(0.5f, 0.5f, 0f));

        if (!Physics.Raycast(ray, out RaycastHit hit))
        {
            return;
        }

        Debug.Log(hit.collider.gameObject.name);

        Transform target = hit.collider.transform;

        while (target != null &&
               !target.CompareTag("Target"))
        {
            target = target.parent;
        }

        if (target == null)
        {
            return;
        }

        MovingTarget movingTarget =
            target.GetComponent<MovingTarget>();

        if (movingTarget != null)
        {
            score += movingTarget.scoreValue;
        }
        else
        {
            score++;
        }

        remainingTargets--;

        if (remainingTargets == 0)
        {
            gameEnded = true;
            scoreText.text = "CLEAR!\nSCORE: " + score;
        }
        else
        {
            scoreText.text = "SCORE: " + score;
        }

        Destroy(target.gameObject);
    }
}