Unity相关代码

public class FindEnemy2 : MonoBehaviour
{
    
    
    public Transform A;

    public Transform B;
    // Start is called before the first frame update
    void Start()
    {
    
    
        
    }

    private float dotResult;

    private Vector3 crossResult;

    // Update is called once per frame
    void Update()
    {
    
    
        dotResult = Vector3.Dot(A.forward, B.position - A.position);
        crossResult = Vector3.Cross(A.forward, B.position - A.position);

        //判断前后
        if(dotResult>=0)
        {
    
    
            //右侧
            if(crossResult.y>=0)
            {
    
    
                Debug.Log("右前");
            }
            //左侧
            else
            {
    
    
                Debug.Log("左前");
            }
        }
        else
        {
    
    
            //右侧
            if(crossResult.y>=0)
            {
    
    
                Debug.Log("后右");
            }
            //左侧
            else
            {
    
    
                Debug.Log("后左");
            }
        }

        if(Vector3.Distance(A.position,B.position)<=5)
        {
    
    
            if(crossResult.y>=0&&Vector3.Angle(A.forward,B.position-A.position)<=30)
            {
    
    
                Debug.Log("右侧30度内");
                Debug.Log("发现入侵者");
            }
            else if(crossResult.y<0&&Vector3.Angle(A.forward,B.position-A.position)<=20)
            {
    
    
                Debug.Log("左侧20度以内");
                Debug.Log("发现入侵者");
            }
        }

    }
}