using Core.Health;
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using Core.Utilities;
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using System.Collections;
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using System.Collections.Generic;
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using TowerDefense.Agents;
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using UnityEngine;
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/// <summary>
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/// 游戏内的电弧效果处理，这个主要是显示从A点电击到B点的电弧特效
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/// </summary>
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public class LightBoltEffect : AgentEffect
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{
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/// <summary>
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/// 电弧的播放特效
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/// </summary>
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protected GameObject m_LightBoltFx;
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/// <summary>
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/// 电弧击中的效果
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/// </summary>
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protected GameObject m_LightHitFx;
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/// <summary>
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/// 删除Timer.
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/// </summary>
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protected Timer m_DestroyTimer;
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/// <summary>
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/// 用于备份粒子系统的默认Scale，在设置完Parent之后，会有对自己Scale的设置，从而导致还回内存池之后,
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/// LocalScale会缩小的情况发生。
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/// </summary>
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protected Vector3 m_BackScale;
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protected Vector3 m_BackScale1;
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/// <summary>
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/// 在srcAgent和dstAgent之间播放一个闪电弧。
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/// </summary>
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/// <param name="maxPlaySec"></param>
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/// <param name="lightBoltPrefab"></param>
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/// <param name="lightHit"></param>
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/// <param name="srcAgent"></param>
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/// <param name="dstAgent"></param>
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public void Initialize(float maxPlaySec, GameObject lightBoltPrefab ,GameObject lightHit, Agent srcAgent,Agent dstAgent )
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{
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m_LightBoltFx = Poolable.TryGetPoolable(lightBoltPrefab);
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if (!m_LightBoltFx) return;
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m_BackScale = m_LightBoltFx.transform.localScale;
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m_LightBoltFx.transform.SetParent(transform, true);
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// 获取位置和放置方向，播放当前的特效
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Vector3 offsetPos = dstAgent.position - srcAgent.position;
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m_LightBoltFx.transform.localPosition = Vector3.zero;
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float xScale = offsetPos.magnitude / 10.0f;
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if (xScale < 1) xScale = 1;
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xScale *= 0.5f;
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m_LightBoltFx.transform.localScale = new Vector3(xScale, 1.0f, 1.0f);
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// 解决 Look rotation viewing vector is zero 这个异常的Bug.
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if (offsetPos.magnitude < 0.0001f)
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{
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offsetPos.y = 1;
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}
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// 旋转方向的处理:
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Quaternion look = Quaternion.LookRotation(offsetPos, Vector3.up);
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m_LightBoltFx.transform.rotation = look;
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// 处理其它相关的内容.
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var particle = m_LightBoltFx.GetComponent<ParticleSystem>();
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if (particle)
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{
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particle.Simulate(0.0f);
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particle.Play();
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}
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// 处理LightHitEffect.
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m_LightHitFx = Poolable.TryGetPoolable(lightHit);
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m_BackScale1 = m_LightHitFx.transform.localScale;
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m_LightHitFx.transform.SetParent(transform, true);
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m_LightHitFx.transform.localPosition = Vector3.zero;
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m_LightHitFx.transform.localScale = new Vector3(2.0f, 2.0f, 2.0f);
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particle = m_LightHitFx.GetComponent<ParticleSystem>();
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if (particle)
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{
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particle.Simulate(0.0f);
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particle.Play();
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}
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// 死亡后直接去除.
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m_Agent.removed += OnRemoved;
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m_DestroyTimer = new Timer(maxPlaySec, RemoveEffect);
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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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/// <summary>
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/// 获取新的Vec相对于(0,0,1)绕Y轴的旋转角度.
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/// </summary>
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/// <param name="vec3rot"></param>
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/// <returns></returns>
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protected float getYRotAngle( Vector3 vec3rot)
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{
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return 0;
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}
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// Update is called once per frame
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void Update()
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{
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if( m_DestroyTimer != null )
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m_DestroyTimer.Tick( Time.deltaTime );
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}
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protected void RemoveEffect()
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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 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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m_Agent.navMeshNavMeshAgent.speed = m_Agent.originalMovementSpeed;
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if (m_LightBoltFx != null)
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{
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var particle = m_LightBoltFx.GetComponent<ParticleSystem>();
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if (particle)
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particle.Stop();
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Poolable.TryPool(m_LightBoltFx);
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m_LightBoltFx.transform.localScale = m_BackScale;
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m_LightBoltFx = null;
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}
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if( m_LightHitFx != null)
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{
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var particle = m_LightHitFx.GetComponent<ParticleSystem>();
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if (particle)
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particle.Stop();
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Poolable.TryPool(m_LightHitFx);
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m_LightHitFx.transform.localScale = m_BackScale1;
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m_LightHitFx = null;
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}
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Destroy(this);
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}
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}
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