如何在 AI 上检测范围内的特定对象？

Question

所以我正在制作 Spectrum 游戏“Snake Pit”的复制品。你可以作为你的玩家移动，并且有多个 AI 控制的蛇。我正试图弄清楚当蛇头就在你旁边时，如何让它们移动到你的位置。这是我想要实现的代码。

public class SnakeController : MonoBehaviour {

public int maxSize;
public int currentSize;
public GameObject snakePrefab;
public Snake Head;
public Snake Tail;
public Vector2 nextPos;
public int NESW;
int Random;
float lineTimer;
int NESWTemp;

// Use this for initialization
void Start () {
    InvokeRepeating("TimerInvoke", 0, .3f);
    lineTimer = UnityEngine.Random.Range(0, 2.5f);
    currentSize = 1;
}

// Update is called once per frame
void Update () {
    lineTimer -= Time.deltaTime;
    if (lineTimer <= 0)
    {
        ComChangeD();
        lineTimer = UnityEngine.Random.Range(0, 2.5f);
    }
}

void TimerInvoke()
{
    Movement();
    if(currentSize >= maxSize)
    {
        TailFunction();
    }
    else
    {
        currentSize++;
    }
}

void Movement()
{
    GameObject temp;
    nextPos = Head.transform.position;

    if(nextPos.y > 3.22)
    {
        NESW = 2;
    }

    else if (nextPos.y < -4.42)
    {
        NESW = 0;
    }

    else if (nextPos.x < -8.2)
    {
        NESW = 1;
    }

    else if (nextPos.x > 7.7)
    {
        NESW = 3;
    }

    switch (NESW)
    {
        case 0:
            nextPos = new Vector2(nextPos.x, nextPos.y + 0.32f);
            break;
        case 1:
            nextPos = new Vector2(nextPos.x + 0.32f, nextPos.y);
            break;
        case 2:
            nextPos = new Vector2(nextPos.x, nextPos.y - 0.32f);
            break;
        case 3:
            nextPos = new Vector2(nextPos.x - 0.32f, nextPos.y);
            break;
    }

    temp = (GameObject)Instantiate(snakePrefab, nextPos, transform.rotation);
    Head.SetNext(temp.GetComponent<Snake>());
    Head = temp.GetComponent<Snake>();
    return;
}

void ComChangeD()
{
    NESWTemp = UnityEngine.Random.Range(0, 3);
    if (NESW == 0)
    {
        switch (NESWTemp)
        {
            case 0:
                NESW = 1;
                break;
            case 1:
                NESW = 2;
                break;
            case 2:
                NESW = 3;
                break;
        }
    }
    else if (NESW == 1)
    {
        switch (NESWTemp)
        {
            case 0:
                NESW = 0;
                break;
            case 1:
                NESW = 2;
                break;
            case 2:
                NESW = 3;
                break;
        }
    }
    else if (NESW == 2)
    {
        switch (NESWTemp)
        {
            case 0:
                NESW = 0;
                break;
            case 1:
                NESW = 1;
                break;
            case 2:
                NESW = 3;
                break;
        }
    }
    else if (NESW == 3)
    {
        switch (NESWTemp)
        {
            case 0:
                NESW = 0;
                break;
            case 1:
                NESW = 1;
                break;
            case 2:
                NESW = 2;
                break;
        }
    }
}

Answer 1

在蛇头下创建空的游戏对象并将其命名为“DetectRange”或类似的名称。然后在检查器中将其宽度和高度设置为您希望蛇跟随玩家的范围的宽度和高度。因此，如果玩家进入该范围，蛇将开始跟随。然后您可以将播放器对象的标签设置为“播放器”或类似的东西（位于检查器的顶部）。然后将脚本附加到DetectRange 并在其中执行：

public GameObject playerObject; //Drag player gameobject in inspector
private float snakeSpeed = 1.0f;


void OnTriggerStay(Collider col)
{
    if(col.gameObject.Tag == "Player") //Check if player entered collider
    {
        playerObject.transform.position = Vector3.MoveTowards(playerObject.transform.position, col.gameObject.position, snakeSpeed);
    }
}