97 lines
3.6 KiB
C#
97 lines
3.6 KiB
C#
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/// ---------------------------------------------
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/// Ultimate Character Controller
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/// Copyright (c) Opsive. All Rights Reserved.
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/// https://www.opsive.com
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/// ---------------------------------------------
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namespace Opsive.UltimateCharacterController.Demo.AI
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{
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using Opsive.UltimateCharacterController.Character;
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using Opsive.UltimateCharacterController.Character.Abilities.Items;
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using Opsive.UltimateCharacterController.Utility;
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using UnityEngine;
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/// <summary>
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/// An extremely simple AI agent that will attack at a fixed interval.
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/// </summary>
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public class MeleeAgent : MonoBehaviour
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{
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[Tooltip("The interval that the agent should attack.")]
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[SerializeField] protected MinMaxFloat m_AttackInterval = new MinMaxFloat(2, 4);
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[Tooltip("The target must be within the specified distance before the agent can attack.")]
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[SerializeField] protected float m_TargetDistance = 3;
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[Tooltip("Attack immediately if the character is within the close distance.")]
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[SerializeField] protected float m_ImmediateAttackDistance = 1.5f;
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[Tooltip("The delay between immediate attacks to prevent the agent from attacking too often.")]
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[SerializeField] protected float m_ImmediateAttackDelay = 0.75f;
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private Transform m_Transform;
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private UltimateCharacterLocomotion m_CharacterLocomotion;
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private AgentMovement m_AgentMovement;
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private Use m_UseAbility;
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private LocalLookSource m_LocalLookSource;
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private float m_AttackTime;
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private float m_NextAttackTime;
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/// <summary>
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/// Initializes the default values.
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/// </summary>
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private void Start()
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{
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m_Transform = transform;
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m_CharacterLocomotion = GetComponent<UltimateCharacterLocomotion>();
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m_AgentMovement = m_CharacterLocomotion.GetAbility<AgentMovement>();
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m_UseAbility = m_CharacterLocomotion.GetAbility<Use>();
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m_LocalLookSource = GetComponent<LocalLookSource>();
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m_AgentMovement.Enabled = false;
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enabled = false;
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}
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/// <summary>
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/// Attacks the target when within distance.
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/// </summary>
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public void Update()
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{
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var attack = false;
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var distance = (m_LocalLookSource.Target.position - m_Transform.position).sqrMagnitude;
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if (m_AttackTime + m_ImmediateAttackDelay < Time.time && distance < m_ImmediateAttackDistance * m_ImmediateAttackDistance) {
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attack = true;
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} else if (m_NextAttackTime < Time.time && distance < m_TargetDistance * m_TargetDistance) {
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attack = true;
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}
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if (attack) {
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m_CharacterLocomotion.TryStartAbility(m_UseAbility);
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m_AttackTime = Time.time;
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m_NextAttackTime = Time.time + m_AttackInterval.RandomValue;
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}
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}
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/// <summary>
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/// Starts the attack.
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/// </summary>
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public void Attack()
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{
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if (m_AgentMovement == null) {
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return;
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}
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// The agent should be able to move while attacking.
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if (!m_AgentMovement.Enabled) {
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m_AgentMovement.Enabled = true;
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}
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enabled = true;
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m_NextAttackTime = Time.time + m_AttackInterval.RandomValue;
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}
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/// <summary>
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/// Cancels the attack.
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/// </summary>
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public void CancelAttack()
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{
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m_AgentMovement.Enabled = false;
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enabled = false;
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}
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}
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}
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