_TheStrongestSnail/TheStrongestSnail/Assets/Scripts/Scene_main/sceneContorl.cs

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

public class sceneContorl : MonoBehaviour, IDragHandler, IBeginDragHandler, IEndDragHandler
{
    public Camera m_cam;
    public GameObject mainScene;
    private bool m_fingerDown = false;

    // <20><>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD>ʼλ<CABC><CEBB>
    private Vector2 m_oneFingerDragStartPos;

    // UIԪ<49>ص<EFBFBD> RectTransform
    private RectTransform mainSceneRectTransform;

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><CFB5>
    private float sensitivity = 0.5f; // <20><><EFBFBD>Ը<EFBFBD><D4B8><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD>Сֵ<D0A1><D6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
    public float minX = -500f; // <20><>Сxֵ
    public float maxX = 500f;  // <20><><EFBFBD><EFBFBD>xֵ


    [Header("<22><><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF>λ<EFBFBD><CEBB>")]
    public float[] targetPositions = new float[] { 0f, -2100f, -3760f, -5350f };

    // <20><><EFBFBD><EFBFBD> mainBTN <20>ű<EFBFBD>
    public mainBTN mainBtnScript;

    // Start is called before the first frame update
    void Start()
    {
        mainSceneRectTransform = mainScene.GetComponent<RectTransform>();
    }

    /// <summary>
    /// <20><>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD>
    /// </summary>
    private void HandleFingerDragMove(Vector2 fingerPos)
    {

        // <20><><EFBFBD>㵱ǰ֡<C7B0>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD>򣬱<EFBFBD>֤<EFBFBD><D6A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>£<EFBFBD>
        Vector3 moveDelta = fingerPos - m_oneFingerDragStartPos; // <20><>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>λ<EFBFBD><CEBB> - <20><>ʼλ<CABC><CEBB>
        Vector3 newPos = mainSceneRectTransform.anchoredPosition;

        // <20><><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD>x<EFBFBD><78>λ<EFBFBD>ã<EFBFBD><C3A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD>Χ<EFBFBD><CEA7>
        newPos.x = newPos.x + (moveDelta.x * sensitivity);

        // <20><><EFBFBD><EFBFBD>x<EFBFBD><78>λ<EFBFBD><CEBB><EFBFBD><EFBFBD> minX <20><> maxX ֮<><D6AE>
        newPos.x = Mathf.Clamp(newPos.x, minX, maxX);

        mainSceneRectTransform.anchoredPosition = newPos; // <20><><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD>ê<EFBFBD><C3AA>λ<EFBFBD><CEBB>   
       

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼλ<CABC>ã<EFBFBD><C3A3><EFBFBD><EFBFBD>ڼ<EFBFBD><DABC><EFBFBD><EFBFBD><EFBFBD>һ֡<D2BB><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        m_oneFingerDragStartPos = fingerPos;
    }


    /// <summary>
    /// <20><><EFBFBD>㵱ǰλ<C7B0><CEBB><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF>λ<EFBFBD><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD>λ<EFBFBD><CEBB><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD><D3BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD><D3A6>Ŀ<EFBFBD><C4BF>λ<EFBFBD><CEBB>ֵ.
    /// </summary>
    /// <param name="currentX"><3E><>ǰX<C7B0><58><EFBFBD><EFBFBD></param>
    /// <returns><3E><><EFBFBD>ؾ<EFBFBD><D8BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF>λ<EFBFBD><CEBB>ֵ</returns>
    float FindClosestNumber(float target)
    {
        float closestNumber = targetPositions[0]; // Ĭ<>ϵ<EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        float minDifference = Mathf.Abs(target - closestNumber); // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD>ֵ

        foreach (float number in targetPositions)
        {
            float difference = Mathf.Abs(target - number); // <20><><EFBFBD>㵱ǰ<E3B5B1><C7B0><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD>ֵ
            if (difference < minDifference)  // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0>ֵ<EFBFBD><D6B5>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
            {
                closestNumber = number;
                minDifference = difference;
            }
        }
        return closestNumber;
    }

    public void OnDrag(PointerEventData eventData)
    {
        
        HandleFingerDragMove(eventData.position);
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        m_oneFingerDragStartPos = Input.mousePosition; // <20><>ȡ<EFBFBD><C8A1><EFBFBD>갴<EFBFBD>µ<EFBFBD><C2B5><EFBFBD>ʼλ<CABC><CEBB>
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        mainBtnScript.MovePanel(FindClosestNumber(mainSceneRectTransform.anchoredPosition.x));
    }
}