2nd/10_Wiki/Topics/AI_and_ML/Unit Stances.md

id, title, category, status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, verification_status, tags, raw_sources, last_reinforced, github_commit, tech_stack

id	title	category	status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	verification_status	tags	raw_sources	last_reinforced	github_commit	tech_stack
wiki-2026-0508-unit-stances	Unit Stances	10_Wiki/Topics	verified	self	RTS Stances Behavior Modes	none	A	0.9	applied	rts game-ai behavior finite-state-machine gameplay		2026-05-10	pending	language framework cpp RTS-AI

Unit Stances

매 한 줄

"매 unit 의 player command 부재 시 매 default reaction policy." RTS (Age of Empires, StarCraft, WARNO) 와 매 RPG party AI 에서 매 micro burden 의 reduction 을 위한 매 핵심 mechanism. 매 4 stance (aggressive · defensive · hold position · stand ground) 가 매 universal taxonomy.

매 핵심

매 4 standard stance

• Aggressive: 매 enemy 발견 → 매 추적 + 매 attack — 매 hunt-and-kill.
• Defensive: 매 enemy 발견 → 매 attack 하되 매 limited pursuit (e.g. tile 5칸).
• Hold position: 매 attack 은 매 in-range 만, 매 movement X — 매 ranged unit 의 default.
• Stand ground / Patrol: 매 movement X + 매 attack X (or 매 patrol path).

매 game 별 variant

• AoE2: aggressive · defensive · stand ground · no attack.
• StarCraft 2: hold position · patrol · attack-move · stop.
• WARNO: weapon-specific (e.g. ATGM hold fire) + stance.
• Total War: skirmish · guard · cycle charge.

매 behavior tree 와 의 관계

• 매 stance 는 매 root selector 의 priority 의 reorder.
• 매 aggressive: pursue → attack → idle.
• 매 hold: attack-in-range → idle (pursue subtree 의 prune).

매 modern game AI 의 LLM 통합

• 2026 trend: 매 NPC commander 의 매 LLM-driven stance switch — 매 battlefield context 에 매 dynamic.
• 매 latency 제약: 매 LLM call 매 5-10초 cooldown — 매 frame-level 결정 X.

매 응용

1. RTS micro reduction: 매 player 가 매 100 units 의 manual control X — 매 stance 로 매 default behavior.
2. Tower defense: 매 tower 의 target priority (closest · strongest · weakest) 의 stance variant.
3. MMO pet AI: 매 hunter pet 의 aggressive · defensive · passive.

💻 패턴

매 Stance enum + FSM (C++)

enum class Stance {
    Aggressive,
    Defensive,
    HoldPosition,
    StandGround,
};

class Unit {
    Stance stance = Stance::Defensive;
    Vec2 anchor;  // 매 hold position 의 reference point
    float pursuit_radius = 5.0f;

    void Update(float dt, const World& world) {
        Unit* enemy = FindNearestEnemy(world);
        if (!enemy) { Idle(); return; }

        switch (stance) {
            case Stance::Aggressive:
                ChaseAndAttack(enemy);
                break;
            case Stance::Defensive:
                if (Distance(pos, enemy->pos) < pursuit_radius
                    && Distance(anchor, enemy->pos) < pursuit_radius * 2)
                    ChaseAndAttack(enemy);
                else if (InAttackRange(enemy))
                    Attack(enemy);
                else
                    ReturnTo(anchor);
                break;
            case Stance::HoldPosition:
                if (InAttackRange(enemy)) Attack(enemy);
                // 매 movement X
                break;
            case Stance::StandGround:
                // 매 nothing
                break;
        }
    }
};

매 Behavior tree 의 stance gating

# py_trees 스타일
def build_unit_bt(stance: str):
    root = Selector("root")
    if stance in ("aggressive", "defensive"):
        pursue = Sequence([CanSeeEnemy(), InPursuitRange(stance), MoveToEnemy()])
        root.add_child(pursue)
    attack = Sequence([CanSeeEnemy(), InAttackRange(), Attack()])
    root.add_child(attack)
    if stance == "defensive":
        root.add_child(Sequence([NotAtAnchor(), ReturnToAnchor()]))
    root.add_child(Idle())
    return root

매 Group stance broadcast (Unity, ECS)

public struct StanceComponent : IComponentData {
    public Stance Value;
    public float3 Anchor;
}

[BurstCompile]
public partial struct ApplyStanceJob : IJobEntity {
    public void Execute(ref StanceComponent stance, in SelectedTag _) {
        stance.Value = NewStanceFromUI;
    }
}

매 LLM-driven dynamic stance (2026)

# 매 commander NPC 가 매 5초마다 매 LLM 으로 stance update
import anthropic

client = anthropic.Anthropic()

def commander_stance(battlefield_state: dict) -> dict[str, str]:
    """매 unit_id → stance mapping 의 return"""
    resp = client.messages.create(
        model="claude-opus-4-7",
        max_tokens=512,
        system="당신은 RTS commander. 매 unit 별 stance 의 결정.",
        messages=[{"role": "user", "content": f"State: {battlefield_state}\n\nJSON: {{unit_id: stance}}"}],
    )
    import json
    return json.loads(resp.content[0].text)

매 Stance cycling hotkey

void OnHotkey_CycleStance(Unit& u) {
    int next = (static_cast<int>(u.stance) + 1) % 4;
    u.stance = static_cast<Stance>(next);
    PlaySound("stance_change.ogg");
    UpdateUI(u);
}

매 Stance-aware pathfinding

def navigate(unit, target, stance):
    if stance == "hold_position":
        return None  # 매 pathfinding 의 skip
    path = a_star(unit.pos, target)
    if stance == "defensive":
        # 매 anchor 에서 매 멀어지는 step 의 prune
        path = [p for p in path if dist(p, unit.anchor) < unit.pursuit_radius * 2]
    return path

매 결정 기준

상황	Default stance
매 melee unit, frontline	Aggressive
매 ranged unit (archer, sniper)	Hold Position
매 worker / villager	Defensive (or Flee)
매 garrison / siege	Stand Ground
매 hero / mage	Defensive

기본값: 매 ranged 는 매 hold, 매 melee 는 매 defensive.

🔗 Graph

• 부모: Behavior Tree
• 변형: Hold Position
• 응용: Eugen Systems 모딩 매뉴얼

🤖 LLM 활용

언제: 매 strategic-level commander NPC 의 매 stance 결정 — 매 5-10초 cadence, 매 unit 별 X 매 group 별. 언제 X: 매 frame-level 결정, 매 individual unit 의 reactive logic — 매 latency · cost 의 prohibitive.

❌ 안티패턴

• 매 Stance 너무 많음: 매 8+ stance — 매 player 의 cognitive overload, 매 같은 effective behavior.
• 매 Hidden stance change: 매 attack-move 후 매 stance auto-revert X — 매 player 의 confusion.
• 매 No visual feedback: 매 stance icon · color 의 부재 — 매 current state 의 invisible.
• 매 Pursuit radius 의 unbounded: 매 defensive 가 매 map 끝까지 chase — 매 anchor distance check 누락.

🧪 검증 / 중복

• Verified (AoE2 manual; StarCraft 2 Battle.net wiki; Eugen Systems WARNO wiki, 2024).
• 신뢰도 A.

🕓 Changelog

날짜	변경
2026-05-08	Phase 1
2026-05-10	Manual cleanup — 4 stance taxonomy + LLM commander 패턴 추가