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

public class Mine : MonoBehaviour
{
    public GameObject effectPrefab;
    public AudioClip sound;

    // 爆発の力
    private float power = 10f;

    // 爆発の力が及ぶ範囲（半径）
    private float radius = 10f;

    private void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.tag == "Player")
        {
            GameObject effect = Instantiate(effectPrefab, transform.position, Quaternion.identity);
            Destroy(effect, 0.5f);
            AudioSource.PlayClipAtPoint(sound, transform.position);

            // タンクのRigidbodyを取得
            Rigidbody rb = collision.gameObject.GetComponent<Rigidbody>();

            // タンクのRigidbodyに爆発の力を加える。
            // ForceMode.VelocityChange・・・＞質量を無視して、瞬間的に速度を変化させる。
            rb.AddExplosionForce(power, transform.position, radius, 1.0f, ForceMode.VelocityChange);

            // 地雷を破壊する。
            Destroy(gameObject);
        }
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class TankHealth : MonoBehaviour
{
    private int tankHP = 10;
    public Text HPLabel;
    public string sceneName;

    void Start()
    {
        HPLabel.text = "" + tankHP;
    }

    private void OnCollisionEnter(Collision collision)
    {
        if(collision.gameObject.tag == "Shell")
        {
            tankHP -= 1;
            HPLabel.text = "" + tankHP;

            if(tankHP < 1)
            {
                this.gameObject.SetActive(false);
                SceneManager.LoadScene(sceneName);
            }
        }

        // ★追加（地雷のダメージ）
        if(collision.gameObject.tag == "Mine")
        {
            tankHP -= 3;
            HPLabel.text = "" + tankHP;

            if(tankHP < 1)
            {
                this.gameObject.SetActive(false);
                SceneManager.LoadScene(sceneName);
            }
        }
    }
}