GameFramework.AiLogic_Npc_General.CombatHandler C# (CSharp) Method

        private void CombatHandler(EntityInfo npc, long deltaTime)
        {
            if (npc.GetSkillStateInfo().IsSkillActivated()) {
                return;
            }

            AiStateInfo info = npc.GetAiStateInfo();
            Vector3 targetPos = info.HomePos;
            ScriptRuntime.Vector3 srcPos = npc.GetMovementStateInfo().GetPosition3D();
            float distSqrToHome = Geometry.DistanceSquare(srcPos, info.HomePos);
            if (distSqrToHome > npc.GohomeRange * npc.GohomeRange) {
                NotifyAiStopPursue(npc);
                ChangeToState(npc, (int)AiStateId.GoHome);
                return;
            }

            ///
            EntityInfo attackTarget = null;
            SkillStateInfo currSkInfo = npc.GetSkillStateInfo();
            ///找到可以使用的技能
            SkillInfo skInfo = AiLogicUtility.NpcFindCanUseSkill(npc, this.GetAiData(npc), true);
            NotifyAiSelectSkill(npc, skInfo);
            if (skInfo == null) {
                //没有可以使用的技能就切换到Idle状态
                ChangeToState(npc, (int)AiStateId.Idle);
                return;
            }

            CharacterRelation relation =
                    (skInfo.TargetType == SkillTargetType.Friend ||
                    skInfo.TargetType == SkillTargetType.RandFriend) ?
                    CharacterRelation.RELATION_FRIEND :
                    CharacterRelation.RELATION_ENEMY;

            attackTarget = AiLogicUtility.GetNearstTargetHelper(
                npc, skInfo.Distance, relation);

            if (attackTarget != null && null != skInfo) //攻击范围内找到可攻击目标
            {
                info.Target = attackTarget.GetId();
                NotifyAiStopPursue(npc);
                NotifyAiSkill(npc, skInfo.SkillId); //攻击目标
                return;
            }
            attackTarget = AiLogicUtility.GetNearstTargetHelper(
            npc, npc.ViewRange, relation);
            if (attackTarget != null) //视野范围内找到可攻击目标
            {
                NotifyAiPursue(npc, attackTarget.GetMovementStateInfo().GetPosition3D()); // 追赶目标
                return;
            }

            currSkInfo.SetCurSkillInfo(0);
            NotifyAiStopPursue(npc);
            ChangeToState(npc, (int)AiStateId.GoHome);
        }