RPG游戏-小地图系统（二）

这里对上次的代码做优化，当进入或者地图时，小地图UI也应该进行变化。

调用次序：MapController—>MiniMapManager -->UIminiMap

1.MapController脚本

首先是每个场景都需要有个MapRoot,MapRoot绑定MapController脚本，且该节点需要有该地图的一个MiniMapBoundingBox(见上一篇文章) 在进入地图时调用单例的MiniMapManager

public class MapController : MonoBehaviour
{
    public Collider minimapBoundingBox;
    // Start is called before the first frame update
    void Start()
    {
        MiniMapManager.Instance.UpdateMinimap(minimapBoundingBox);
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}
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2.MiniMapManager脚本

using Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;

namespace Managers
{

    class MiniMapManager : Singleton<MiniMapManager>
    {
        private Collider minimapBoundingBox;
        public UIMiniMap miniMap;
        public Collider MinimapBoundingBox
        {
            get { return minimapBoundingBox; }
        }
        public Transform PlayerTransform
        {
            get
            {
                if (User.Instance.CurrentCharacterObj == null) return null;
                return User.Instance.CurrentCharacterObj.transform;
            }
        }
        public Sprite LoadCurrentMiniMap()
        {
            return Resources.Load<Sprite>("UI/MiniMap/" + User.Instance.CurrentMapData.MiniMap);
        }
        public void UpdateMinimap(Collider minimapBoundingBox)
        {
            this.minimapBoundingBox = minimapBoundingBox;
            if (this.miniMap != null)
            {
                this.miniMap.UpdateMap();
            }
        }
    }
}

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3.UIMiniMap脚本

using Models;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Managers;

public class UIMiniMap : MonoBehaviour
{
    public Image minimap;
    public Image arrow;//角色箭头
    public Text MapName;
    private Transform playerTransform;
    public Collider MinimapBoundingBox;
    void Start()
    {
        MiniMapManager.Instance.miniMap = this;
        this.UpdateMap();
    }
    public void UpdateMap()
    {
        this.MapName.text = User.Instance.CurrentMapData.Name;
        this.minimap.overrideSprite = MiniMapManager.Instance.LoadCurrentMiniMap();
        this.minimap.SetNativeSize();
        this.minimap.transform.localPosition = Vector3.zero;
        this.MinimapBoundingBox = MiniMapManager.Instance.MinimapBoundingBox;
        this.playerTransform = null;//进入新地图玩家的实例不是上个图的，因此需要清理掉 在update重新获取

    }
    // Update is called once per frame
    void Update()//坐标转换：世界坐标->小地图坐标
    {
        this.UpdateMap();
        if (playerTransform == null)
        {
            this.playerTransform = MiniMapManager.Instance.PlayerTransform;//获取角色对象实例
        }
        if (MinimapBoundingBox == null || playerTransform == null) return;
        float realWidth = this.MinimapBoundingBox.bounds.size.x;
        float realHeight = this.MinimapBoundingBox.bounds.size.z;
        float relaX = playerTransform.position.x - MinimapBoundingBox.bounds.min.x;//MinimapBoundingBox.bounds.min.x->碰撞体左下角的X坐标
        float relaY = playerTransform.position.z - MinimapBoundingBox.bounds.min.z;

        float pivotX = relaX / realWidth;
        float pivotY = relaY / realHeight;
        //获取玩家在小地图的中心点位置
        this.minimap.rectTransform.pivot = new Vector2(pivotX, pivotY);
        this.minimap.rectTransform.localPosition = Vector2.zero;//相对于父物体pivot的子物体pivot位置
        this.arrow.transform.eulerAngles = new Vector3(0, 0, -this.playerTransform.eulerAngles.y);
        //小地图是2D坐标 标准XYZ 角色是3D坐标 绕Y旋转
    }
}

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