using System;
using System.Collections.Generic;
using Godot;
/// <summary>
/// 房间归属区域
/// </summary>
public partial class AffiliationArea : Area2D, IDestroy
{
public bool IsDestroyed { get; private set; }
/// <summary>
/// 当前实例所属房间
/// </summary>
public RoomInfo RoomInfo;
/// <summary>
/// 当前归属区域包含的所有物体对象, 物体进入另一个区域时才会从该集合中移除
/// </summary>
private readonly HashSet<ActivityObject> _includeItems = new HashSet<ActivityObject>();
/// <summary>
/// 已经进入 AffiliationArea 所在范围内的物体, 物体一旦离开该区域就会立刻从该集合中删除
/// </summary>
private readonly HashSet<ActivityObject> _enterItems = new HashSet<ActivityObject>();
/// <summary>
/// 玩家是否是第一次进入
/// </summary>
public bool IsFirstEnterFlag { get; private set; } = true;
private bool _init = false;
private Vector2 _initSize;
private RectangleShape2D _shape;
/// <summary>
/// 根据矩形区域初始化归属区域
/// </summary>
public void Init(RoomInfo roomInfo, Rect2I rect2)
{
if (_init)
{
return;
}
_init = true;
_initSize = rect2.Size;
RoomInfo = roomInfo;
var collisionShape = new CollisionShape2D();
collisionShape.GlobalPosition = rect2.Position + rect2.Size / 2;
var shape = new RectangleShape2D();
_shape = shape;
shape.Size = rect2.Size;
collisionShape.Shape = shape;
AddChild(collisionShape);
_Init();
}
private void _Init()
{
Monitoring = true;
Monitorable = false;
CollisionLayer = PhysicsLayer.None;
CollisionMask = PhysicsLayer.Prop | PhysicsLayer.Role | PhysicsLayer.Debris | PhysicsLayer.Throwing | PhysicsLayer.Obstacle;
BodyEntered += OnBodyEntered;
BodyExited += OnBodyExited;
}
/// <summary>
/// 将物体添加到当前所属区域中
/// </summary>
public void InsertItem(ActivityObject activityObject)
{
if (activityObject.AffiliationArea == this)
{
return;
}
if (activityObject.AffiliationArea != null)
{
activityObject.AffiliationArea._includeItems.Remove(activityObject);
}
activityObject.AffiliationArea = this;
if (_includeItems.Add(activityObject))
{
//如果是玩家
if (activityObject == RoomInfo.World.Player)
{
CallDeferred(nameof(OnPlayerInsertRoom));
}
}
}
/// <summary>
/// 将物体从当前所属区域移除
/// </summary>
public void RemoveItem(ActivityObject activityObject)
{
if (activityObject.AffiliationArea == null)
{
return;
}
activityObject.AffiliationArea = null;
_includeItems.Remove(activityObject);
}
/// <summary>
/// 获取该区域中物体的总数
/// </summary>
public int GetIncludeItemsCount()
{
return _includeItems.Count;
}
/// <summary>
/// 统计符合条件的数量
/// </summary>
/// <param name="handler">操作函数, 返回是否满足要求</param>
public int FindIncludeItemsCount(Func<ActivityObject, bool> handler)
{
var count = 0;
foreach (var activityObject in _includeItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
count++;
}
}
return count;
}
/// <summary>
/// 查询所有符合条件的对象并返回
/// </summary>
/// <param name="handler">操作函数, 返回是否满足要求</param>
public ActivityObject[] FindIncludeItems(Func<ActivityObject, bool> handler)
{
var list = new List<ActivityObject>();
foreach (var activityObject in _includeItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
list.Add(activityObject);
}
}
return list.ToArray();
}
/// <summary>
/// 检查是否有符合条件的对象
/// </summary>
/// <param name="handler">操作函数, 返回是否满足要求</param>
public bool ExistIncludeItem(Func<ActivityObject, bool> handler)
{
foreach (var activityObject in _includeItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
return true;
}
}
return false;
}
/// <summary>
/// 获取进入该区域中物体的总数
/// </summary>
public int GetEnterItemsCount()
{
return _enterItems.Count;
}
/// <summary>
/// 统计进入该区域且符合条件的数量
/// </summary>
/// <param name="handler">操作函数, 返回是否满足要求</param>
public int FindEnterItemsCount(Func<ActivityObject, bool> handler)
{
var count = 0;
foreach (var activityObject in _enterItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
count++;
}
}
return count;
}
/// <summary>
/// 查询所有进入该区域且符合条件的对象并返回
/// </summary>
/// <param name="handler">操作函数, 返回是否满足要求</param>
public ActivityObject[] FindEnterItems(Func<ActivityObject, bool> handler)
{
var list = new List<ActivityObject>();
foreach (var activityObject in _enterItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
list.Add(activityObject);
}
}
return list.ToArray();
}
/// <summary>
/// 检查是否有进入该区域且符合条件的对象
/// </summary>
/// <param name="handler">操作函数, 返回是否满足要求</param>
public bool ExistEnterItem(Func<ActivityObject, bool> handler)
{
foreach (var activityObject in _enterItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
return true;
}
}
return false;
}
/// <summary>
/// 遍历该该区域的物体
/// </summary>
/// <param name="handler">操作函数, 返回 false 表示跳出循环</param>
public void ForEachIncludeItems(Func<ActivityObject, bool> handler)
{
foreach (var activityObject in _includeItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
return;
}
}
}
/// <summary>
/// 遍历该进入该区域的物体
/// </summary>
/// <param name="handler">操作函数, 返回 false 表示跳出循环</param>
public void ForEachEnterItems(Func<ActivityObject, bool> handler)
{
foreach (var activityObject in _enterItems)
{
if (!activityObject.IsDestroyed && handler(activityObject))
{
return;
}
}
}
/// <summary>
/// 返回物体是否进入了该区域
/// </summary>
public bool IsEnter(ActivityObject activityObject)
{
return _enterItems.Contains(activityObject);
}
private void OnBodyEntered(Node2D body)
{
if (body is ActivityObject activityObject)
{
_enterItems.Add(activityObject);
InsertItem(activityObject);
}
}
private void OnBodyExited(Node2D body)
{
if (body is ActivityObject activityObject)
{
_enterItems.Remove(activityObject);
}
}
//玩家进入房间
private void OnPlayerInsertRoom()
{
if (IsFirstEnterFlag)
{
if (RoomInfo.World.Player is Player player)
{
player.OnFirstEnterRoom(RoomInfo);
}
EventManager.EmitEvent(EventEnum.OnPlayerFirstEnterRoom, RoomInfo);
}
EventManager.EmitEvent(EventEnum.OnPlayerEnterRoom, RoomInfo);
IsFirstEnterFlag = false;
}
public void Destroy()
{
if (IsDestroyed)
{
return;
}
IsDestroyed = true;
QueueFree();
_includeItems.Clear();
_enterItems.Clear();
}
/// <summary>
/// 在初始区域的基础上扩展区域, size为扩展大小
/// </summary>
public void ExtendedRegion(Vector2 size)
{
_shape.Size = _initSize + size;
}
/// <summary>
/// 将区域还原到初始大小
/// </summary>
public void RestoreRegion()
{
_shape.Size = _initSize;
}
}
