using ActionGameFramework.Health;
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using TowerDefense.Agents;
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using UnityEngine;
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namespace TowerDefense.Affectors
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{
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/// <summary>
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/// Uses a trigger to attach and remove <see cref="AgentSlower" /> components to agents
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/// </summary>
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public class SlowAffector : PassiveAffector
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{
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/// <summary>
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/// A normalized value to slow agents by
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/// </summary>
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[Range(0, 1)]
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public float slowFactor;
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/// <summary>
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/// The slow factor for displaying to the UI
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/// </summary>
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public string slowFactorFormat = "<b>Slow Factor:</b> {0}";
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/// <summary>
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/// The particle system that plays when an entity enters the sphere
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/// </summary>
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public ParticleSystem enterParticleSystem;
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public GameObject slowFxPrefab;
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/// <summary>
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/// The audio source that plays when an entity enters the sphere
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/// </summary>
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public AudioSource audioSource;
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/// <summary>
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/// Subsribes to the relevant targetter events
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/// </summary>
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protected void Awake()
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{
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towerTargetter.targetEntersRange += OnTargetEntersRange;
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towerTargetter.targetExitsRange += OnTargetExitsRange;
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}
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/// <summary>
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/// Unsubsribes from the relevant targetter events
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/// </summary>
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void OnDestroy()
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{
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towerTargetter.targetEntersRange -= OnTargetEntersRange;
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towerTargetter.targetExitsRange -= OnTargetExitsRange;
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}
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/// <summary>
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/// Attaches a <see cref="AgentSlower" /> to the agent
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/// </summary>
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/// <param name="target">The agent to attach the slower to</param>
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protected void AttachSlowComponent(Agent target)
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{
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var slower = target.GetComponent<AgentSlower>();
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if (slower == null)
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{
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slower = target.gameObject.AddComponent<AgentSlower>();
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}
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slower.Initialize(slowFactor, slowFxPrefab, target.appliedEffectOffset, target.appliedEffectScale);
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if (enterParticleSystem != null)
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{
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enterParticleSystem.Play();
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}
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if (audioSource != null)
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{
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audioSource.Play();
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}
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}
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/// <summary>
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/// Removes the <see cref="AgentSlower" /> from the agent once it leaves the area
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/// </summary>
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/// <param name="target">The agent to remove the slower from</param>
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protected void RemoveSlowComponent(Agent target)
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{
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if (target == null)
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{
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return;
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}
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var slowComponent = target.gameObject.GetComponent<AgentSlower>();
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if (slowComponent != null)
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{
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slowComponent.RemoveSlow(slowFactor);
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}
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}
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/// <summary>
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/// Fired when the targetter aquires a new targetable
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/// </summary>
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protected void OnTargetEntersRange(Targetable other)
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{
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var agent = other as Agent;
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if (agent == null)
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{
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return;
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}
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AttachSlowComponent(agent);
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}
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/// <summary>
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/// Fired when the targetter aquires loses a targetable
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/// </summary>
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protected void OnTargetExitsRange(Targetable other)
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{
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var searchable = other as Agent;
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if (searchable == null)
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{
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return;
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}
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RemoveSlowComponent(searchable);
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}
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}
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}
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