[게임 매니악스 슈팅 게임 알고리즘] 방향탄 Unity 로 따라하기

게임 매니악스 슈팅 게임 알고리즘에 나오는 방향탄 코드 2-7, 2-8을 Unity에서 테스트해봤습니다.

using UnityEngine;
 
public class InitDirectedBullet{
 
    public static Vector2 GetBulletSpeedVector(float theta)
    {
        Vector2 bulletSpeedVector;
        bulletSpeedVector.x = Mathf.Cos(Mathf.PI / 180 * theta); 
        bulletSpeedVector.y = Mathf.Sin(Mathf.PI / 180 * theta);
        return bulletSpeedVector;
    }
}
 

using System.Collections;
using UnityEngine;
 
public class EnemyShoot : MonoBehaviour {
 
    public GameObject bullet;
    float theta;
    private void Start()
    {
        StartCoroutine(Shoot());
    }
 
    IEnumerator Shoot()
    {
        yield return null;
 
        while(true)
        {
            if (theta + 30 >= 360)
            {
                theta = 0;
            }
            else
            {
                theta += 30;
            }
 
            GameObject bullet = Instantiate(this.bullet, transform.position, Quaternion.identity);
            bullet.GetComponent<MoveDirectedBullet>().bulletSpeedVector = InitDirectedBullet.GetBulletSpeedVector(theta);
            bullet.GetComponent<MoveDirectedBullet>().speed = 0.1f;
            yield return new WaitForSeconds(0.1f);
 
        }
 
    }
}
 

using UnityEngine;
 
public class MoveDirectedBullet : MonoBehaviour {
    
    public Vector2 bulletSpeedVector;
    public float speed;
    // Update is called once per frame
    void Update () {
 
        transform.Translate(bulletSpeedVector * speed);
    }
}