using System.Collections.Generic;
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using ActionGameFramework.Health;
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using ActionGameFramework.Helpers;
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using ActionGameFramework.Projectiles;
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using Core.Utilities;
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using TowerDefense.Affectors;
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using TowerDefense.Level;
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using UnityEngine;
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using UnityEngine.Events;
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namespace TowerDefense.Towers.TowerLaunchers
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{
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/// <summary>
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/// Rapid fire launcher, launchers a homing projectile
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/// </summary>
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public class SuperTowerLauncher : HomingLauncher
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{
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/// <summary>
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/// How long the tower will stay active
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/// </summary>
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public float towerLifeSpan = 10;
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/// <summary>
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/// Angle, in degrees, to rotate, on the x axis, the fire vector by
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/// </summary>
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public float fireVectorXRotationAdjustment = 45.0f;
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/// <summary>
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/// Fires when the max amount of projectiles has been reached
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/// </summary>
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public UnityEvent death;
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/// <summary>
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/// Timer to invoke a unity event when it elapses
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/// </summary>
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protected Timer m_LifeTimer;
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/// <summary>
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/// Finds a random enemy in a list and fires from a random point
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/// </summary>
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/// <param name="enemies">
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/// The list of enemies to sample from
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/// </param>
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/// <param name="attack">
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/// The object used to attack
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/// </param>
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/// <param name="firingPoints"></param>
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public override void Launch(List<Targetable> enemies, GameObject attack, Transform[] firingPoints,int maxAttack = 1)
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{
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var poolable = Poolable.TryGetPoolable<Poolable>(attack);
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if (poolable == null)
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{
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return;
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}
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Targetable enemy = enemies[Random.Range(0, enemies.Count)];
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Transform firingPoint = GetRandomTransform(firingPoints);
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Launch(enemy, poolable.gameObject, firingPoint);
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}
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public override void Launch(Targetable enemy, GameObject attack, Transform firingPoint,int idx = 0)
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{
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var homingMissile = attack.GetComponent<HomingLinearProjectile>();
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if (homingMissile == null)
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{
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Debug.LogError("No HomingLinearProjectile attached to attack object");
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return;
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}
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Vector3 startingPoint = firingPoint.position;
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Vector3 targetPoint = Ballistics.CalculateLinearLeadingTargetPoint(
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startingPoint, enemy.position,
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enemy.velocity, homingMissile.startSpeed,
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homingMissile.acceleration);
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homingMissile.SetHomingTarget(enemy);
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var attackAffector = GetComponent<AttackAffector>();
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Vector3 direction = attackAffector.towerTargetter.turret.forward;
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Vector3 binormal = Vector3.Cross(direction, Vector3.up);
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Quaternion rotation = Quaternion.AngleAxis(fireVectorXRotationAdjustment, binormal);
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Vector3 adjustedFireVector = rotation * direction;
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homingMissile.FireInDirection(startingPoint, adjustedFireVector);
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PlayParticles(fireParticleSystem, startingPoint, targetPoint);
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}
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/// <summary>
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/// Subscribes to Level Manager onStateChanged
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/// If waves have already begun, then begin death timer
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/// </summary>
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protected virtual void OnEnable()
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{
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if (!LevelManager.instanceExists)
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{
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return;
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}
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LevelState currentState = LevelManager.instance.levelState;
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if (currentState == LevelState.SpawningEnemies || currentState == LevelState.AllEnemiesSpawned)
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{
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m_LifeTimer = new Timer(towerLifeSpan, OnLifeTimerElapsed);
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}
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else
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{
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LevelManager.instance.levelStateChanged += OnLevelStateChanged;
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}
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}
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/// <summary>
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/// Unsubscribe from Level Manager onStateChanged
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/// </summary>
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protected virtual void OnDisable()
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{
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if (LevelManager.instanceExists)
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{
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LevelManager.instance.levelStateChanged -= OnLevelStateChanged;
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}
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}
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/// <summary>
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/// Tick the timer
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/// </summary>
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protected void Update()
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{
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if (m_LifeTimer == null)
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{
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return;
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}
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m_LifeTimer.Tick(Time.deltaTime);
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}
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/// <summary>
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/// Invoke the UnityEvent once the timer elapses
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/// </summary>
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protected void OnLifeTimerElapsed()
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{
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death.Invoke();
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}
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/// <summary>
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/// Checks the current state, if within a valid state, start the death timer
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/// </summary>
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/// <param name="previousState">
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/// The previous state the the LevelManager was in
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/// </param>
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/// <param name="currentState">
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/// The current state the LevelManager was in
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/// </param>
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void OnLevelStateChanged(LevelState previousState, LevelState currentState)
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{
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if (currentState == LevelState.SpawningEnemies || currentState == LevelState.AllEnemiesSpawned)
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{
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m_LifeTimer = new Timer(towerLifeSpan, OnLifeTimerElapsed);
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}
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}
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}
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}
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