rg1/client/Battle/BehaviorTree/Action/TryCastAbilityExplicitAction.cs

using BehaviorDesigner.Runtime;
using BehaviorDesigner.Runtime.Tasks;
using GAS.Runtime;
using UnityEngine;

namespace CoreGame.Render
{
    /// <summary>
    /// 释放明确的技能
    /// </summary>
    [TaskDescription("释放明确的技能")]
    public class TryCastAbilityExplicitAction : Action
    {
        [BehaviorDesigner.Runtime.Tasks.Tooltip("能力id")]
        [SerializeField] private int gaCid;
        [BehaviorDesigner.Runtime.Tasks.Tooltip("是否优先使用已经授予的技能")]
        [SerializeField] private bool useHasGrantGa = true;
        [BehaviorDesigner.Runtime.Tasks.Tooltip("释放完是否移除技能，默认false")]
        [SerializeField] private bool dropAbilityWhenEnd = false;
        private bool m_HasAttach = false;
        private CombatEntity m_OwnerEnt;
        private int m_GaSeq;
        private bool m_HasActiveGa;

        // 重置
        public override void OnAwake()
        {
            m_OwnerEnt = null;
            m_GaSeq = -1;
            m_HasAttach = false;
            m_HasActiveGa = false;
        }
        public override void OnStart()
        {
            if (m_HasAttach == false)
            {
                m_OwnerEnt = Owner.GetEntity<CombatEntity>();
                if (useHasGrantGa)
                {
                    m_GaSeq = m_OwnerEnt.abilitySystem.AbilityContainer.GetUniqueAbilitySpecByGaid(gaCid);
                }

                // 如果没有授予技能，尝试授予技能
                if (m_GaSeq <= 0)
                {
                    var ctx = AbilitySrv.AttachActiveAbility(m_OwnerEnt, gaCid);
                    if (ctx != null)
                    {
                        m_GaSeq = ctx.gaSeq;
                        ctx.dropAbilityWhenEnd = dropAbilityWhenEnd;
                        if (dropAbilityWhenEnd)
                            ctx.abilitySpec.RegisterUnGrantAbility(OnUnGrantAbility);
                    }
                }
                
                if (m_GaSeq > 0)
                {
                    m_HasAttach = true;
                }
            }
            
            // 尝试激活技能
            m_HasActiveGa = m_OwnerEnt.abilitySystem.TryActivateAbility_WithSeq(m_GaSeq);
        }
        
        private void OnUnGrantAbility(AbilitySpec abilitySpec)
        {
            if (m_HasAttach)
            {
                m_HasAttach = false;
            }
        }

        public override TaskStatus OnUpdate()
        {
            if (m_HasActiveGa == false)
            {
                return TaskStatus.Failure;
            }
            
            var abilitySpecs = m_OwnerEnt.abilitySystem.AbilityContainer.AbilitySpecs();
            if (abilitySpecs.TryGetValue(m_GaSeq, out var abilitySpec))
            {
                var ret = abilitySpec.CanActivate();
                if (ret == AbilityActivateResult.FailHasActivated)
                {
                    return TaskStatus.Running;
                }
                
                return TaskStatus.Success;
            }

            return TaskStatus.Failure;
        }


    }
}