간단한 유도 미사일 구현하기!

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

public class MissileLauncher : MonoBehaviour
{
    [SerializeField]
    GameObject m_goMissile = null;
    [SerializeField]
    Transform m_tfMissileSpawn = null;

    private void Start()
    {

    }
    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.Alpha3))
        {
            GameObject t_missile = Instantiate(m_goMissile, m_tfMissileSpawn.position, Quaternion.identity);
            t_missile.GetComponent<Rigidbody>().velocity = Vector3.up * 5f;
        }
    }
}

 

이건 이제 발사를 시켜주기 위한 코드 입니다

 

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

public class Missile : MonoBehaviour
{
    private const string playerTag = "Player";

    public GameObject sparkEffect;

    Rigidbody m_rigid = null;
    Transform m_tfTarget = null;

    [SerializeField]
    float m_speed = 0f;
    float m_currentSpeed = 0f;
    [SerializeField]
    LayerMask m_layerMask = 0;
    [SerializeField]
    ParticleSystem m_psEffect = null;

    void SearchEnemy()
    {
        Collider[] t_cols = Physics.OverlapSphere(transform.position, 100f, m_layerMask);

        if(t_cols.Length > 0)
        {
            m_tfTarget = t_cols[Random.Range(0, t_cols.Length)].transform;
        }
    }

    IEnumerator LaunchDelay()
    {
        yield return new WaitUntil(() => m_rigid.velocity.y < 0f);
        yield return new WaitForSeconds(0.1f);

        SearchEnemy();
        m_psEffect.Play();

        yield return new WaitForSeconds(5f);
        Destroy(gameObject);
    }

    private void Start()
    {
        m_rigid = GetComponent<Rigidbody>();
        StartCoroutine(LaunchDelay());
    }

    private void Update()
    {
        if(m_tfTarget != null)
        {
            if (m_currentSpeed <= m_speed)
                m_currentSpeed += m_speed * Time.deltaTime;

            transform.position += transform.up * m_currentSpeed * Time.deltaTime;

            Vector3 t_dir = (m_tfTarget.position - transform.position).normalized;
            transform.up = Vector3.Lerp(transform.up, t_dir, 0.25f);
        }
    }

    void ShowEffect(Collision coll)
    {
        // 충돌 지점의 정보를 추출
        ContactPoint contact = coll.contacts[0];
        // 법선 벡터가 이루는 회전각도를 추출
        Quaternion rot = Quaternion.FromToRotation(-Vector3.forward, contact.normal);
        // 폭발 효과 프리팹을 동적으로 생성

        /*
         * Instantiate 함수의 3번째 인자는 회전각도로서 Quaternion 타입니다.
         * Quaternion.identity 의 의미는 프리팹을 무회전 또는 회전값이 없는 상태로 적용한다
         */
        GameObject effect = Instantiate(sparkEffect, this.transform.position, Quaternion.identity);
        GameObject effect = Instantiate(sparkEffect, contact.point, rot);
        Destroy(effect, 2.0f);
        PoolManager.Instance.Despawn(effect, 2f);
    }

    private void OnCollisionEnter(Collision coll)
    {
        if (coll.transform.CompareTag("ENEMY"))
        {
            Destroy(coll.gameObject);
        }
        if (coll.transform.tag != playerTag)
        {
            Destroy(this.gameObject);
        }
    }
}

 

이 코드가 바로 유도 미사일 코드 입니다 ENEMY 라는 태그가 걸린 오브젝트 들을 찾아 다니게 되는거죠