OvertakingLegend/Assets/UIFrameWork/Script/TopmostLayerUI/TopmostLayerUI_ArrowPoints.cs

using Sirenix.OdinInspector;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

/// <summary>
/// <20><><EFBFBD>ϲ<EFBFBD>UI_<49><5F>ͷָ<CDB7><D6B8>
/// </summary>
public partial class TopmostLayerUI
{
    /// <summary>
    /// <20><>Ե<EFBFBD><D4B5><EFBFBD><EFBFBD>
    /// </summary>
    public float edgeSpacing=0.5f;

    /// <summary>
    /// <20><>ͷָ<CDB7><D6B8><EFBFBD>ڵ<EFBFBD>
    /// </summary>
    public Transform arrowheadPointToNode;

    /// <summary>
    /// <20><>ͷָ<CDB7><D6B8><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>
    /// </summary>
    public Dictionary<string, ArrowPoints> arrowPointsDic = new Dictionary<string, ArrowPoints>();

    /// <summary>
    /// <20><><EFBFBD>ü<EFBFBD>ͷָ<CDB7><D6B8>
    /// </summary>
    /// <param name="mono">MonoBehaviour<75><72></param>
    /// <param name="name">ָ<><D6B8>ID</param>
    /// <param name="target">ָ<><D6B8><EFBFBD><EFBFBD>3D<33><44><EFBFBD><EFBFBD></param>
    /// <param name="sprite">ͼ<><CDBC></param>
    public void SetArrowObj(string name, GameObject target, Sprite sprite = null)
    {
        if (this.arrowPointsDic.ContainsKey(name)) return;
        YooAssetManager.Instance.LoadAssetAsync<GameObject>(PackagesName.GameData, "ArrowObj", (arrowObj) =>
        {
            ArrowObjUI arrows =CachePoolManager.Instance.Take(arrowObj).GetComponent<ArrowObjUI>();
            arrows.SetIconImage(sprite);
            arrows.transform.SetParent(arrowheadPointToNode);
            arrows.transform.localPosition = Vector3.zero;
            arrows.transform.localScale = Vector3.one;  

            Coroutine coroutine = StartCoroutine(E_SetPointObj(arrows, target.transform));
            ArrowPoints arrowPoints = new ArrowPoints();
            arrowPoints.coroutine = coroutine;
            arrowPoints.arrowObj = arrows.gameObject;

            if (!arrowPointsDic.ContainsKey(name))
            {
                arrowPointsDic.Add(name, arrowPoints);
            }
        });
    }

    /// <summary>
    /// <20><><EFBFBD>ü<EFBFBD>ͷָ<CDB7><D6B8><EFBFBD><EFBFBD>Э<EFBFBD><D0AD>
    /// </summary>
    /// <returns></returns>
    private IEnumerator E_SetPointObj(ArrowObjUI arrows, Transform target)
    {
        Vector3 recordingPos=Vector3.zero;
        arrows.gameObject.SetActive(false);
        while (true)
        {
            if (target)
            {
                var pos = Camera.main.WorldToScreenPoint(target.transform.position);
                var distance = Vector3.Distance(recordingPos, pos);
                if (distance > 1)
                {
                    recordingPos = pos;
                    if (0 > pos.x || pos.x > Screen.width || pos.y < 0 || pos.y > Screen.height || pos.z < 0)
                    {
                        arrows.gameObject.SetActive(true);

                        if (pos.z < 0)
                        {
                            pos = pos * -1;
                        }

                        var startpos = new Vector3(Screen.width / 2f, Screen.height / 2f, 0);
                        var dir = (pos - startpos).normalized;

                        //ͨ<><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Һ<EFBFBD><D2BA><EFBFBD><EFBFBD><EFBFBD>ȡ <20><><EFBFBD><EFBFBD> a<><61>b <20>нǣ<D0BD>Ĭ<EFBFBD><C4AC>Ϊ <20><><EFBFBD>ȣ<EFBFBD>
                        float radians = Mathf.Atan2(dir.y, dir.x);

                        //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>Ϊ <20>Ƕ<EFBFBD>
                        float angle = radians * Mathf.Rad2Deg;

                        arrows.transform.localEulerAngles = new Vector3(0, 0, angle);
        
                        float sereenangle = (float)Screen.height / (float)Screen.width;
                        var va = System.Math.Abs(dir.y / dir.x);
                        if (va <= sereenangle)
                        {
                            var length = arrows.GetComponent<RectTransform>().sizeDelta.x;
                            if (pos.x < 0)
                            {
                                arrows.transform.position = GetNodeX(pos, startpos, length * edgeSpacing);
                            }
                            else
                            {
                                arrows.transform.position = GetNodeX(pos, startpos, Screen.width - length * edgeSpacing);
                            }
                        }
                        else
                        {
                            var length = arrows.GetComponent<RectTransform>().sizeDelta.x;

                            if (pos.y < 0)
                            {
                                arrows.transform.position = GetNodeY(pos, startpos, length * edgeSpacing);
                            }
                            else
                            {
                                arrows.transform.position = GetNodeY(pos, startpos, Screen.height - length * edgeSpacing);
                            }
                        }
                    }
                    else
                    {
                        arrows.gameObject.SetActive(false);
                    }
                }
            }
            yield return null;
        }
    }

    /// <summary>
    /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>峬<EFBFBD><E5B3AC><EFBFBD><EFBFBD>Ļ<EFBFBD>߻<EFBFBD>С<EFBFBD><D0A1>0ʱUI<55><49>λ<EFBFBD><CEBB>
    /// </summary>
    /// <returns></returns>
    private Vector3 GetNodeY(Vector3 pos, Vector3 startpos, float v)
    {
        pos = new Vector3(pos.x, pos.y, 0);
        Vector3 ab = pos - startpos;
        Vector3 am = ab * (Mathf.Abs(startpos.y - v) / Mathf.Abs(pos.y - startpos.y));
        Vector3 om = startpos + am;
        return om;
    }

    /// <summary>
    /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>峬<EFBFBD><E5B3AC><EFBFBD><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD>С<EFBFBD><D0A1>0ʱUI<55><49>λ<EFBFBD><CEBB>
    /// </summary>
    /// <returns></returns>
    private Vector3 GetNodeX(Vector3 pos, Vector3 startpos, float v)
    {
        pos = new Vector3(pos.x, pos.y, 0);
        Vector3 ab = pos - startpos;
        Vector3 am = ab * (Mathf.Abs(startpos.x - v) / Mathf.Abs(pos.x - startpos.x));
        Vector3 om = startpos + am;
        return om;
    }

    /// <summary>
    /// ָ<><D6B8><EFBFBD>ر<EFBFBD>
    /// </summary>
    /// <param name="name"></param>
    public void SpecifyClose(string name)
    {
        if (arrowPointsDic.ContainsKey(name))
        {
            StopCoroutine(arrowPointsDic[name].coroutine);
            Destroy(arrowPointsDic[name].arrowObj);
            arrowPointsDic.Remove(name);
        }
    }

    /// <summary>
    /// ȫ<><C8AB><EFBFBD>ر<EFBFBD>
    /// </summary>
    [Button]
    public void Clear()
    {
        foreach (var item in arrowPointsDic)
        {
            StopCoroutine(arrowPointsDic[item.Key].coroutine);
            Destroy(arrowPointsDic[item.Key].arrowObj);
        }
        arrowPointsDic.Clear();
    }
}

/// <summary>
/// ָ<><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
/// </summary>
public class ArrowPoints
{
    /// <summary>
    /// ָ<><D6B8><EFBFBD><EFBFBD>Э<EFBFBD><D0AD>
    /// </summary>
    public Coroutine coroutine;

    /// <summary>
    /// ָ<><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UI
    /// </summary>
    public GameObject arrowObj;
}