框选

 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
using UnityEngine.UI;
/// <summary>
/// 
/// </summary>
public class SetBox : MonoBehaviour
{
    Vector3 starPos;
    public Camera cam;
    public Transform playerbox;//人物所在父级
    bool isDrap = false;
    RectTransform rectTransform;
    public float p = 0.1f;
    public float max = 5;

    List<GameObject> selects = new List<GameObject>();
    // Start is called before the first frame update
    void Start()
    {
        rectTransform = GetComponent<RectTransform>();
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            starPos = Input.mousePosition;
            isDrap = true;
        }
        if (isDrap)
        {
            Vector2 size = new Vector2(Mathf.Abs(Input.mousePosition.x - starPos.x), Mathf.Abs(Input.mousePosition.y - starPos.y));
            rectTransform.sizeDelta = size;
            float mixX = (Input.mousePosition.x < starPos.x ? Input.mousePosition.x : starPos.x) - Screen.width / 2;
            float mixY = (Input.mousePosition.y < starPos.y ? Input.mousePosition.y : starPos.y) - Screen.height / 2;
            rectTransform.anchoredPosition = new Vector2(mixX, mixY);
        }
        if (Input.GetMouseButtonUp(0))
        {
            isDrap = false;
            SeclePlayer();
            rectTransform.sizeDelta = Vector2.zero;
            
        }
        if (Input.GetMouseButtonDown(1))
        {
            Ray ray = cam.ScreenPointToRay(Input.mousePosition);
            if(Physics.Raycast(ray,out RaycastHit hit))
            {
                if (selects.Count > 0)
                {
                    float c = 2 * selects.Count;
                    float r = c / (Mathf.PI * 2);
                    float ang = Mathf.PI * 2 / selects.Count;
                    for (int i = 0; i < selects.Count; i++)
                    {
                        float x = Mathf.Sin(ang * i) * r + hit.point.x;
                        float z = Mathf.Cos(ang * i) * r + hit.point.z;
                        float noise = Mathf.PerlinNoise((x + 50) * p, (z + 50) * p);
                        float y = noise * max;
                        selects[i].GetComponent<NavMeshAgent>().SetDestination(new Vector3(x, y, z));
                    }
                }
            }
        }
    }
    public void SeclePlayer()
    {
        selects.Clear();
        for (int i = 0; i < playerbox.childCount; i++)
        {
            Vector3 pos = cam.WorldToScreenPoint(playerbox.GetChild(i).position);
            Rect rect = new Rect(rectTransform.anchoredPosition + new Vector2(Screen.width / 2, Screen.height / 2), rectTransform.sizeDelta);
            if (rect.Contains(new Vector2(pos.x, pos.y)))
            {
                playerbox.GetChild(i).Find("ring").gameObject.SetActive(true);
                selects.Add(playerbox.GetChild(i).gameObject);
            }
            else
            {
                playerbox.GetChild(i).Find("ring").gameObject.SetActive(false);
            }
        }
    }
}