Unity精确选中物体

通过RaycastAll获取hits

遍历hits时通过MeshRender的边界来确定是否有选中该物体

组件绑相机上就可以了

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class ChooseExactly : MonoBehaviour
{
    private Ray ray;
    private RaycastHit[] hits;
    private Bounds bounds;

	void Update ()
    {
        if (Input.GetMouseButtonDown(0))
        {
            ray = Camera.main.ScreenPointToRay(Input.mousePosition);//定义射线，定位到鼠标的位置
            hits = Physics.RaycastAll(ray, Mathf.Infinity);
            for (int i = 0; i < hits.Length; i++)
            {
                bounds = hits[i].transform.GetComponent<MeshRenderer>().bounds;

                if (bounds.IntersectRay(ray))
                {
                    Debug.Log(i+","+hits[i].transform);
                    break;
                }
            }
        }
    }
}