using Core.Utilities;
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using UnityEngine;
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namespace Core.Health
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{
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/// <summary>
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/// Simple class to instantiate a ParticleSystem on a given Damageable's death
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/// 这个类只有一个功能，播放死亡特效。
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/// 这个类的函数附加到Damageable的died Action上.
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/// </summary>
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public class DeathEffect : MonoBehaviour
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{
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/// <summary>
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/// The DamageableBehaviour that will be used to assign the damageable
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/// </summary>
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[Tooltip("This field does not need to be populated here, it can be set up in code using AssignDamageable")]
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public DamageableBehaviour damageableBehaviour;
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/// <summary>
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/// Death particle system
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/// </summary>
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public ParticleSystem deathParticleSystemPrefab;
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/// <summary>
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/// World space offset of the <see cref="deathParticleSystemPrefab"/> position
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/// </summary>
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public Vector3 deathEffectOffset;
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/// <summary>
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/// The damageable
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/// </summary>
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protected Damageable m_Damageable;
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/// <summary>
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/// Subscribes to the damageable's died event
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/// </summary>
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/// <param name="damageable"></param>
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public void AssignDamageable(Damageable damageable)
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{
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if (m_Damageable != null)
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{
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m_Damageable.died -= OnDied;
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}
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m_Damageable = damageable;
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m_Damageable.died += OnDied;
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}
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/// <summary>
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/// If damageableBehaviour is populated, assigns the damageable
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/// </summary>
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protected virtual void Awake ()
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{
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if (damageableBehaviour != null)
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{
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AssignDamageable(damageableBehaviour.configuration);
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}
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}
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/// <summary>
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/// Instantiate a death particle system
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/// </summary>
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void OnDied(HealthChangeInfo healthChangeInfo)
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{
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if (deathParticleSystemPrefab == null)
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{
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return;
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}
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var pfx = Poolable.TryGetPoolable<ParticleSystem>(deathParticleSystemPrefab.gameObject);
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pfx.transform.position = transform.position + deathEffectOffset;
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// TEST CODE TO DELTE: ATTENTION TO OPP: 加入更加成熟的机制来加强效果：
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//pfx.transform.localScale = new Vector3(1.0f, 1.0f, 1.0f);
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pfx.Simulate(1.2f); // TEST CODE TO DELETE:
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pfx.Play();
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}
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}
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}
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