using System.Collections.Generic;
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using Core.Health;
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using Core.Utilities;
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using UnityEngine;
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namespace TowerDefense.Agents
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{
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/// <summary>
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/// This effect will get attached to an agent that is within range of the SlowAffector radius
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/// </summary>
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public class AgentSlower : AgentEffect
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{
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protected GameObject m_SlowFx;
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/// <summary>
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/// 列表的原因是这个效果是可以叠加的，多个效果叠加在一起必须得使用列表的形式来处理。
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/// </summary>
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protected List<float> m_CurrentEffects = new List<float>();
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/// <summary>
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/// Initializes the slower with the parameters configured in the SlowAffector
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/// </summary>
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/// <param name="slowFactor">Normalized float that represents the % slowdown applied to the agent</param>
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/// <param name="slowfxPrefab">The instantiated object to visualize the slow effect</param>
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/// <param name="position"></param>
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/// <param name="scale"></param>
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public void Initialize(float slowFactor, GameObject slowfxPrefab = null,
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Vector3 position = default(Vector3),
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float scale = 1)
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{
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LazyLoad();
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m_CurrentEffects.Add(slowFactor);
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// find greatest slow effect
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float min = slowFactor;
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foreach (float item in m_CurrentEffects)
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{
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min = Mathf.Min(min, item);
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}
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float originalSpeed = m_Agent.originalMovementSpeed;
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float newSpeed = originalSpeed * min;
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m_Agent.navMeshNavMeshAgent.speed = newSpeed;
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if (m_SlowFx == null && slowfxPrefab != null)
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{
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m_SlowFx = Poolable.TryGetPoolable(slowfxPrefab);
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m_SlowFx.transform.parent = transform;
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m_SlowFx.transform.localPosition = position;
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m_SlowFx.transform.localScale *= scale;
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}
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m_Agent.removed += OnRemoved;
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}
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/// <summary>
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/// Resets the agent's speed
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/// </summary>
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public void RemoveSlow(float slowFactor)
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{
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m_Agent.removed -= OnRemoved;
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m_CurrentEffects.Remove(slowFactor);
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if (m_CurrentEffects.Count != 0)
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{
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return;
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}
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// No more slow effects
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ResetAgent();
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}
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/// <summary>
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/// Agent has died, remove affect
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/// </summary>
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void OnRemoved(DamageableBehaviour targetable)
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{
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m_Agent.removed -= OnRemoved;
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ResetAgent();
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}
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void ResetAgent()
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{
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if (m_Agent != null)
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{
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m_Agent.navMeshNavMeshAgent.speed = m_Agent.originalMovementSpeed;
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}
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if (m_SlowFx != null)
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{
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Poolable.TryPool(m_SlowFx);
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m_SlowFx.transform.localScale = Vector3.one;
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m_SlowFx = null;
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}
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Destroy(this);
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}
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}
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}
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