using System;
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using System.Collections.Generic;
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using System.Net;
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using ActionGameFramework.Health;
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using Core.Health;
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using UnityEngine;
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using UnityEngine.UIElements;
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using Random = UnityEngine.Random;
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namespace TowerDefense.Targetting
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{
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/// <summary>
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/// 选择目标Agent的方式
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/// </summary>
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public enum EEnemySelFunc
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{
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NULL,
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Nearest, // 离终点最近的.
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Random, // 随机选择.
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MaxHp, // 血量最高的.
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END
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}
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/// <summary>
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/// Class used to track targets for an affector
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/// 这个类比较古怪的地方是他本身并没有显示出来Collider，但却有Collider Component.是在
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/// void AttachCollider() 这个函数中(TargetterEditor.cs)，动态的添加了不同类型的Collider Component,
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/// 然后隐藏了这个Collider Component,但是却可以在游戏内当作Collider Component来使用。
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/// 在TargetterEditor内，设置isTrigger为true
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///
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/// event 的作用在于声明的对应公有 Action or delegate变量，不能在类的外面执行，只在类的外面 += -= 操作
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///
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/// </summary>
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public class Targetter : MonoBehaviour
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{
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public static bool bSearchTarget = true;
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/// <summary>
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/// Fires when a targetable enters the target collider
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/// </summary>
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public event Action<Targetable> targetEntersRange;
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/// <summary>
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/// Fires when a targetable exits the target collider
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/// </summary>
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public event Action<Targetable> targetExitsRange;
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/// <summary>
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/// Fires when an appropriate target is found
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/// </summary>
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public event Action<Targetable> acquiredTarget;
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/// <summary>
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/// Fires when the current target was lost
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/// </summary>
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public event Action lostTarget;
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/// <summary>
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/// The transform to point at the target
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/// </summary>
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public Transform turret;
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/// <summary>
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/// 搜索敌人的方式：默认是最近，加入随机和血量最多，后期再加其它的模式
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/// </summary>
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public EEnemySelFunc searchEnemyFunc = EEnemySelFunc.Nearest;
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/// <summary>
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/// The range of the turret's x rotation
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/// </summary>
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public Vector2 turretXRotationRange = new Vector2(0, 359);
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/// <summary>
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/// If m_Turret rotates freely or only on y;
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/// </summary>
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public bool onlyYTurretRotation;
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/// <summary>
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/// The search rate in searches per second
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/// </summary>
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public float searchRate;
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/// <summary>
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/// Y rotation speed while the turret is idle in degrees per second
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/// </summary>
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public float idleRotationSpeed = 39f;
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/// <summary>
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/// The time it takes for the tower to correct its x rotation on idle in seconds
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/// </summary>
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public float idleCorrectionTime = 2.0f;
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/// <summary>
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/// The collider attached to the targetter
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/// </summary>
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public Collider attachedCollider;
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/// <summary>
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/// How long the turret waits in its idle form before spinning in seconds
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/// </summary>
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public float idleWaitTime = 2.0f;
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/// <summary>
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/// The current targetables in the collider
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/// </summary>
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protected List<Targetable> m_TargetsInRange = new List<Targetable>();
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/// <summary>
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/// The seconds until a search is allowed
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/// </summary>
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protected float m_SearchTimer = 0.0f;
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/// <summary>
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/// The seconds until the tower starts spinning
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/// </summary>
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protected float m_WaitTimer = 0.0f;
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/// <summary>
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/// The current targetable
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/// </summary>
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protected Targetable m_CurrrentTargetable;
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/// <summary>
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/// Counter used for x rotation correction
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/// </summary>
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protected float m_XRotationCorrectionTime;
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/// <summary>
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/// If there was a targetable in the last frame
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/// </summary>
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protected bool m_HadTarget;
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/// <summary>
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/// How fast this turret is spinning
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/// </summary>
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protected float m_CurrentRotationSpeed;
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/// <summary>
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/// returns the radius of the collider whether
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/// its a sphere or capsule
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/// </summary>
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public float effectRadius
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{
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get
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{
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var sphere = attachedCollider as SphereCollider;
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if (sphere != null)
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{
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return sphere.radius;
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}
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var capsule = attachedCollider as CapsuleCollider;
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if (capsule != null)
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{
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return capsule.radius;
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}
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return 0;
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}
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}
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/// <summary>
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/// The alignment of the affector
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/// </summary>
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public IAlignmentProvider alignment;
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/// <summary>
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/// Returns the current target
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/// </summary>
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public Targetable GetTarget(int waveline, bool noPoison = false)
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{
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switch (this.searchEnemyFunc)
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{
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case EEnemySelFunc.Nearest:
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case EEnemySelFunc.MaxHp:
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case EEnemySelFunc.Random:
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{
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if (bOpponent)
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{
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//return AgentInsManager.instance.oppoMinDisAgent;
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if (waveline >= 0)
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return AgentInsManager.instance.GetMinDisAgent(waveline, true, false, noPoison);
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else
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{
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Debug.Log("当前Opponent传入的参数waveLine is:" + waveline);
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return AgentInsManager.instance.MinDisAgent;
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}
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}
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else
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{
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//return AgentInsManager.instance.MinDisAgent;
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if (waveline >= 0)
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return AgentInsManager.instance.GetMinDisAgent(waveline, false, false, noPoison);
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else
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{
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Debug.Log("当前传入的参数waveLine is:" + waveline);
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return AgentInsManager.instance.MinDisAgent;
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}
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}
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}
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/* case EEnemySelFunc.MaxHp:
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{
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return AgentInsManager.instance.getMaxHpAgent(bOpponent);
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}
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case EEnemySelFunc.Random:
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{
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return AgentInsManager.instance.getRandomAgent(bOpponent);
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}*/
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}
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return null;
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}
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/// <summary>
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/// 是否是对手战斗方.
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/// </summary>
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public bool bOpponent { set; get; }
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/// <summary>
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/// Clears the list of current targets and clears all events
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/// </summary>
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public void ResetTargetter()
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{
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m_TargetsInRange.Clear();
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m_CurrrentTargetable = null;
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targetEntersRange = null;
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targetExitsRange = null;
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acquiredTarget = null;
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lostTarget = null;
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// Reset turret facing
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if (turret != null)
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{
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turret.localRotation = Quaternion.identity;
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}
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}
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/// <summary>
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/// Returns all the targets within the collider. This list must not be changed as it is the working
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/// list of the targetter. Changing it could break the targetter
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/// </summary>
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public List<Targetable> GetAllTargets()
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{
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switch (searchEnemyFunc)
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{
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case EEnemySelFunc.MaxHp:
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{
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return AgentInsManager.instance.getAgentListMaxHp(bOpponent);
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}
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case EEnemySelFunc.Random:
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{
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return AgentInsManager.instance.getAgentListRandom(bOpponent);
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}
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}
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// 最后返回的就是距离计算的模式：
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if (this.bOpponent)
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return AgentInsManager.instance.OppoAgentInRange;
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else
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return AgentInsManager.instance.AgentInRange;
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}
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/// <summary>
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/// Checks if the targetable is a valid target
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/// </summary>
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/// <param name="targetable"></param>
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/// <returns>true if targetable is vaild, false if not</returns>
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protected virtual bool IsTargetableValid(Targetable targetable)
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{
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if (targetable == null)
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{
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return false;
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}
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IAlignmentProvider targetAlignment = targetable.configuration.alignmentProvider;
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bool canDamage = alignment == null || targetAlignment == null ||
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alignment.CanHarm(targetAlignment);
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return canDamage;
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}
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/// <summary>
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/// On exiting the trigger, a valid targetable is removed from the tracking list.
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/// </summary>
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/// <param name="other">The other collider in the collision</param>
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protected virtual void OnTriggerExit(Collider other)
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{
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var targetable = other.GetComponent<Targetable>();
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if (!IsTargetableValid(targetable))
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{
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return;
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}
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m_TargetsInRange.Remove(targetable);
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if (targetExitsRange != null)
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{
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targetExitsRange(targetable);
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}
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if (targetable == m_CurrrentTargetable)
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{
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OnTargetRemoved(targetable);
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}
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else
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{
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// Only need to remove if we're not our actual target, otherwise OnTargetRemoved will do the work above
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targetable.removed -= OnTargetRemoved;
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}
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}
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/// <summary>
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/// On entering the trigger, a valid targetable is added to the tracking list.
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/// </summary>
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/// <param name="other">The other collider in the collision</param>
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protected virtual void OnTriggerEnter(Collider other)
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{
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GameObject tobj = this.transform.parent.gameObject;
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Collider tcol = GetComponent<Collider>();
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var targetable = other.GetComponent<Targetable>();
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if (!IsTargetableValid(targetable))
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{
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return;
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}
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targetable.removed += OnTargetRemoved;
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m_TargetsInRange.Add(targetable);
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if (targetEntersRange != null)
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{
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targetEntersRange(targetable);
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}
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}
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/// <summary>
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/// Returns the nearest targetable within the currently tracked targetables
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/// </summary>
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/// <returns>The nearest targetable if there is one, null otherwise</returns>
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protected virtual Targetable GetNearestTargetable()
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{
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// 使用统一管理的管理器接口.
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if (this.bOpponent)
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return AgentInsManager.instance.oppoMinDisAgent;
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else
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return AgentInsManager.instance.MinDisAgent;
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}
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/// <summary>
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/// Starts the search timer
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/// </summary>
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protected virtual void Start()
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{
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m_SearchTimer = searchRate;
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m_WaitTimer = idleWaitTime;
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}
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/// <summary>
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/// Checks if any targets are destroyed and aquires a new targetable if appropriate
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/// </summary>
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protected virtual void Update()
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{
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m_SearchTimer -= Time.deltaTime;
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if (m_SearchTimer <= 0.0f && m_CurrrentTargetable == null && m_TargetsInRange.Count > 0)
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{
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m_CurrrentTargetable = GetNearestTargetable();
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if (m_CurrrentTargetable != null)
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{
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if (acquiredTarget != null)
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{
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acquiredTarget(m_CurrrentTargetable);
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}
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m_SearchTimer = searchRate;
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}
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}
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AimTurret();
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m_HadTarget = m_CurrrentTargetable != null;
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}
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/// <summary>
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/// Fired by the agents died event or when the current target moves out of range,
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/// Fires the lostTarget event.
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/// </summary>
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void OnTargetRemoved(DamageableBehaviour target)
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{
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target.removed -= OnTargetRemoved;
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if (m_CurrrentTargetable != null && target.configuration == m_CurrrentTargetable.configuration)
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{
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if (lostTarget != null)
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{
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lostTarget();
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}
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m_HadTarget = false;
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m_TargetsInRange.Remove(m_CurrrentTargetable);
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m_CurrrentTargetable = null;
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m_XRotationCorrectionTime = 0.0f;
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}
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else //wasnt the current target, find and remove from targets list
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{
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for (int i = 0; i < m_TargetsInRange.Count; i++)
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{
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if (m_TargetsInRange[i].configuration == target.configuration)
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{
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m_TargetsInRange.RemoveAt(i);
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break;
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}
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}
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}
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}
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/// <summary>
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/// Aims the turret at the current target
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/// 将炮塔对准当前目标
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/// </summary>
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protected virtual void AimTurret()
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{
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if (turret == null)
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{
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return;
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}
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if (m_CurrrentTargetable == null) // do idle rotation
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{
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if (m_WaitTimer > 0)
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{
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m_WaitTimer -= Time.deltaTime;
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if (m_WaitTimer <= 0)
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{
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m_CurrentRotationSpeed = (Random.value * 2 - 1) * idleRotationSpeed;
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}
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}
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else
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{
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Vector3 euler = turret.rotation.eulerAngles;
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euler.x = Mathf.Lerp(Wrap180(euler.x), 0, m_XRotationCorrectionTime);
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m_XRotationCorrectionTime = Mathf.Clamp01((m_XRotationCorrectionTime + Time.deltaTime) / idleCorrectionTime);
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euler.y += m_CurrentRotationSpeed * Time.deltaTime;
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turret.eulerAngles = euler;
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}
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}
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else
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{
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m_WaitTimer = idleWaitTime;
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Vector3 targetPosition = m_CurrrentTargetable.position;
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if (onlyYTurretRotation)
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{
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targetPosition.y = turret.position.y;
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}
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Vector3 direction = targetPosition - turret.position;
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Quaternion look = Quaternion.LookRotation(direction, Vector3.up);
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Vector3 lookEuler = look.eulerAngles;
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// We need to convert the rotation to a -180/180 wrap so that we can clamp the angle with a min/max
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float x = Wrap180(lookEuler.x);
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lookEuler.x = Mathf.Clamp(x, turretXRotationRange.x, turretXRotationRange.y);
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look.eulerAngles = lookEuler;
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turret.rotation = look;
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}
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}
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/// <summary>
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/// A simply function to convert an angle to a -180/180 wrap
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/// </summary>
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static float Wrap180(float angle)
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{
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angle %= 360;
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if (angle < -180)
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{
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angle += 360;
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}
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else if (angle > 180)
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{
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angle -= 360;
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}
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return angle;
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}
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}
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}
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