Unity Button 3D

[Button3D].md

• 通过Collider实现3D场景中玩家对物体的点击响应
• refCamera为当前场景中用于捕捉此 3D Button 的摄像机，默认为 Camera.main，可手动指定
• 需要至少有一种 Collider 组件在 Button3D 上

Button3D.cs

using System.Collections;
using System.Collections.Generic;
using DancingLine.GameCamera;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;

[RequireComponent(typeof(Collider))]
public class Button3D : MonoBehaviour
{
    public Camera refCamera;
    public bool interactable = true;
    public UnityEvent onClick;
    Collider _collider;

    public LayerMask layerMask;
    //StandaloneInputModule _uguiInput;
    void Start()
    {
        refCamera ??= CameraHolder.Instance.MainCamera;
        _collider = GetComponent<Collider>();
        // _uguiInput = EventSystem.current.GetComponent<StandaloneInputModule>();
        _refCameraTrans = refCamera.transform;
        _trans = transform;
    }

    //bool _userClickedInsideColl;
    private Transform _refCameraTrans;
    private Transform _trans;
    void Update()
    {
        if(!_collider) return;
            
        //_uguiInput.enabled = false;
            
        if (interactable && Input.GetMouseButtonDown(0))
        {
            var ray = refCamera.ScreenPointToRay(Input.mousePosition);
            var distance = Vector3.Distance(_refCameraTrans.position, _trans.position);
                
            if (Physics.Raycast(ray, out var hit, distance, layerMask)) {
                if (CompareCollider(hit.collider, _collider))
                {
                    //_userClickedInsideColl = true;
                    onClick?.Invoke();
                }
            }
        }
        /*else if (interactable && _userClickedInsideColl && Input.GetMouseButtonUp(0))
        {
            Ray ray = refCamera.ScreenPointToRay(Input.mousePosition);

            if (Physics.Raycast(ray, out var hit)) {
                if (CompareCollider(hit.collider, _collider))
                {
                    _userClickedInsideColl = false;
                    onClick?.Invoke();
                }
            }
        }
        else if(!interactable || !Input.GetMouseButton(0))
        {
            _userClickedInsideColl = false;
        }
        
        _uguiInput.enabled = true;*/
    }

    bool CompareCollider(Collider a, Collider b)
    {
        if (!a || !b) return false;

        return a == b;
    }
}