Unity 3D做2D坦克大战--敌人自动攻击AI编写

敌人AI攻击方法的编写

老师 | Trigger

学习者 |小白

出品 | Siki 学院

public class Enemy : MonoBehaviour
{

    //属性值
    public float movespeed = 3;
    private Vector3 bullectEulerAngles;
    private float v = -1;
    private float h;
    //引用
    private SpriteRenderer sr;
    public Sprite[] tanksprite;// 上 右 下 左
    public GameObject bullectPrafabs;
    public GameObject explosionPrefab;
    //计时器
    private float timeVal;
    private float timeValChangeDirection;//改变方向的计时器

    private void Awake()
    {
        sr = GetComponent<SpriteRenderer>();
    }  
    void Update()
    {
        //攻击的时间间隔
        if (timeVal >= 3f)
        {
            Attack();
        }
        else
        {
            timeVal += Time.deltaTime;
        }
    }
    private void FixedUpdate()
    {
        Move();
    }

    private void Attack()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            Instantiate(bullectPrafabs, transform.position, Quaternion.Euler(transform.eulerAngles + bullectEulerAngles));
            timeVal = 0;
        }
    }
    //坦克的移动方法
    private void Move()
    {
        if (timeValChangeDirection >= 4)//如果攻击后4秒产生转向
        {
            int num = Random.Range(0, 8);
            if (num > 5)//向下走
            {
                v = -1;
                h = 0;
            }
            else if (num == 0)//往回走
            {
                v = 1;
                h = 0;
            }
            else if (num > 0 && num <= 2)//向左走
            {
                h = -1;
                v = 0;
            }
            else if (num > 2 && num <= 4)//向右走
            {
                h = 1;
                v = 0;
            }
            timeValChangeDirection = 0;     //计时器清零
        }
        else
        {
            timeValChangeDirection += Time.fixedDeltaTime;  //计时器累加
        }

        transform.Translate(Vector3.up *this.v* movespeed * Time.fixedDeltaTime, Space.World);

        

        if (v < 0)
        {
            sr.sprite = tanksprite[2];
            bullectEulerAngles = new Vector3(0, 0, -180);
        }
        else if (v > 0)
        {
            sr.sprite = tanksprite[0];
            bullectEulerAngles = new Vector3(0, 0, 0);
        }
        transform.Translate(Vector3.up * v * movespeed * Time.fixedDeltaTime, Space.World);

        if (v != 0)
        {
            return;
        }

        transform.Translate(Vector3.right * h * movespeed * Time.fixedDeltaTime, Space.World);
        if (h < 0)
        {
            sr.sprite = tanksprite[3];
            bullectEulerAngles = new Vector3(0, 0, 90);
        }
        else if (h > 0)
        {
            sr.sprite = tanksprite[1];
            bullectEulerAngles = new Vector3(0, 0, -90);
        }      
    }

    private void Die()
    {     
        //爆炸特效
        Instantiate(explosionPrefab, transform.position, transform.rotation);
        //死亡方法
        Destroy(gameObject);
    }
    private void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Enemy")
        {
            timeValChangeDirection = 4;
        }
    }

}

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