VirtualFramework/Assets/Scripts/Item/ObjDrag.cs

using DG.Tweening;
using QFramework;
using System;
using UnityEngine;
using UnityEngine.Events;

public class ObjDrag : MonoBehaviour, IObjDrag
{
    private Vector3 offset;
    bool isOn = false;

    Vector3 startPosition;

    UnityEvent<GameObject> OnDragEnd = new UnityEvent<GameObject>();

    bool IObjDrag.isOn { get => isOn; set => isOn = value; }
    UnityEvent<GameObject> IObjDrag.OnDragEnd
    {
        get
        {
            if (OnDragEnd == null)
            {
                OnDragEnd = new UnityEvent<GameObject>();
            }
            return OnDragEnd;
        }
    }

    void Start()
    {
        startPosition = gameObject.transform.position;
    }

    private void OnMouseUp()
    {
        if (isOn)
        {
            Show3DCamera.instance.lockMove = false;
            OnDragEnd?.Invoke(gameObject);
        }
    }

    void OnMouseDown()
    {
        if (isOn)
        {
            // <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
            Vector3 mouseWorldPos = GetMouseWorldPositionOnPlane();
            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ƫ<EFBFBD><C6AB><EFBFBD><EFBFBD>
            offset = transform.position - mouseWorldPos;
            Show3DCamera.instance.lockMove = true;
        }
    }

    void OnMouseDrag()
    {
        if (isOn)
        {
            // <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
            Vector3 mouseWorldPos = GetMouseWorldPositionOnPlane();
            // <20><><EFBFBD><EFBFBD>ƫ<EFBFBD><C6AB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
            transform.position = mouseWorldPos + offset;
        }
    }

    private Vector3 GetMouseWorldPositionOnPlane()
    {
        // <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD>ϵ<EFBFBD>λ<EFBFBD><CEBB>
        Vector3 mouseScreenPos = Input.mousePosition;
        mouseScreenPos.z = Camera.main.WorldToScreenPoint(transform.position).z; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        Vector3 mouseWorldPos = Camera.main.ScreenToWorldPoint(mouseScreenPos);

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD>ķ<EFBFBD><C4B7>߷<EFBFBD><DFB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>
        Vector3 cameraForward = Camera.main.transform.forward;

        // <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ƽ<EFBFBD>棬<EFBFBD><E6A3AC><EFBFBD>߷<EFBFBD><DFB7><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD>ͨ<EFBFBD><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ǰλ<C7B0><CEBB>
        Plane plane = new Plane(cameraForward, transform.position);

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        Ray ray = Camera.main.ScreenPointToRay(mouseScreenPos);

        float distance;
        if (plane.Raycast(ray, out distance))
        {
            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD>
            return ray.GetPoint(distance);
        }

        // <20><><EFBFBD><EFBFBD>û<EFBFBD><C3BB><EFBFBD>ཻ<EFBFBD><E0BDBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ǰλ<C7B0><CEBB>
        return transform.position;
    }

    // ˫<><CBAB><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    public void OnDoubleClick()
    {
        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫִ<D2AA>е<EFBFBD>˫<EFBFBD><CBAB><EFBFBD>߼<EFBFBD>
        // <20><><EFBFBD>磬<EFBFBD><E7A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><C3B5><EFBFBD>ʼλ<CABC><CEBB>
        //transform.position = startPosition;
        transform.DOMove(startPosition, 0.1f);
    }
}