[G1-Sync] Manual knowledge update

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---
id: wiki-2026-0508-state-machine-and-phase-transiti
title: State Machine and Phase Transition Events
category: 10_Wiki/Topics_GD
status: draft
category: 10_Wiki/Topics
status: verified
canonical_id: self
aliases: []
aliases: [FSM, Game State Machine, Phase Events]
duplicate_of: none
source_trust_level: A
confidence_score: 0.92
tags: [uncategorized]
confidence_score: 0.9
verification_status: applied
tags: [game-design, fsm, simulation, architecture]
raw_sources: []
last_reinforced: 2026-05-08
last_reinforced: 2026-05-10
github_commit: pending
inferred_by: Claude Opus 4.7 (auto-normalize 2026-05-08)
tech_stack:
language: typescript
framework: xstate
---
---
redirect_to: "[[게임_디자인_및_가상_경제_시스템]]"
canonical_id: "wiki-2026-0507-105"
---
# State Machine and Phase Transition Events
# Redirect
## 매 한 줄
> **"매 game logic 의 FSM-first 의 architecture"**. 매 boss phase, match flow, sector breach, AI behavior 의 deterministic state model — 매 transition event 의 explicit emission 으로 telemetry/animation/audio 의 synchronize. 매 2026 standard: XState v5 + actor model + visualizer.
이 문서는 Canonical 문서인 통합되었습니다.
모든 최신 지식과 세부 내용은 위 링크를 참조하십시오.
## 매 핵심
### 매 정의
- **State**: 매 finite labeled status (idle, charging, attacking, dead).
- **Event**: external trigger (input, timer, hp_threshold).
- **Transition**: state × event → next_state + side_effects.
- **Phase event**: cross-cutting broadcast (e.g. "phase_2_started") for multiple subsystems.
> 🤖 **[AI 추론 보강 필요]** — 본문이 200자 미만이라 P-Reinforce가 빈약 stub으로 분류했습니다.
> source_trust_level=`C` (AI 보강분), confidence_score=`0.92`로 표시되어 있습니다.
> 사용자 검증 후 trust_level 상향 조정 가능.
### 매 핵심 패턴
- **Hierarchical states**: parent/child (combat → charging → release).
- **Parallel states**: 매 동시 sub-FSM (movement + weapon + status).
- **Guards**: 매 transition 의 conditional gate.
- **Actions**: entry/exit/transition side effects.
### 매 응용
1. Boss fight phase logic.
2. Multiplayer match flow (lobby → loading → playing → results).
3. Quest/dialogue branching.
4. Network connection lifecycle.
## 📌 한 줄 통찰 (The Karpathy Summary)
## 💻 패턴
> *(TODO: 한 문장으로 핵심 통찰을 작성. "X는 Y 조건에서 Z 효과를 낸다" 구조 권장.)*
### XState v5 boss FSM
```typescript
import { setup, createActor } from 'xstate';
## 📖 구조화된 지식 (Synthesized Content)
const bossMachine = setup({
types: { context: {} as { hp: number }, events: {} as { type: 'damage'; amount: number } | { type: 'tick' } },
actions: {
broadcastPhase: ({ context }) => emit('phase_event', { phase: context.hp > 5000 ? 1 : context.hp > 2000 ? 2 : 3 }),
},
guards: {
phase2: ({ context }) => context.hp <= 5000 && context.hp > 2000,
phase3: ({ context }) => context.hp <= 2000 && context.hp > 0,
dead: ({ context }) => context.hp <= 0,
},
}).createMachine({
id: 'boss',
initial: 'phase1',
context: { hp: 10_000 },
states: {
phase1: { on: { damage: { actions: 'broadcastPhase', guard: 'phase2', target: 'phase2' } } },
phase2: { on: { damage: { actions: 'broadcastPhase', guard: 'phase3', target: 'phase3' } } },
phase3: { on: { damage: { guard: 'dead', target: 'dead' } } },
dead: { type: 'final' },
},
});
**추출된 패턴:**
> *(TODO)*
export const bossActor = createActor(bossMachine);
```
**세부 내용:**
- *(TODO)*
### Hand-rolled FSM (no deps)
```typescript
type State = 'idle' | 'charging' | 'attacking' | 'cooldown';
type Event = 'see_target' | 'charge_done' | 'attack_done' | 'lose_target';
## 🤖 LLM 활용 힌트 (How to Use This Knowledge)
const TABLE: Record<State, Partial<Record<Event, State>>> = {
idle: { see_target: 'charging' },
charging: { charge_done: 'attacking', lose_target: 'idle' },
attacking: { attack_done: 'cooldown' },
cooldown: { charge_done: 'idle' },
};
**언제 이 지식을 쓰는가:**
- *(TODO)*
export class FSM {
state: State = 'idle';
send(e: Event) {
const next = TABLE[this.state][e];
if (next) { this.exit(this.state); this.state = next; this.enter(next); }
}
enter(s: State) { /* hooks */ }
exit(s: State) { /* hooks */ }
}
```
**언제 쓰면 안 되는가:**
- *(TODO)*
### Phase event bus
```typescript
type PhaseEvent =
| { kind: 'phase_changed'; from: number; to: number; entityId: string }
| { kind: 'sector_state_changed'; sectorId: string; state: string }
| { kind: 'match_state_changed'; matchId: string; state: string };
## 🧪 검증 상태 (Validation)
class EventBus {
private listeners = new Map<string, Array<(e: PhaseEvent) => void>>();
emit(e: PhaseEvent) { for (const fn of this.listeners.get(e.kind) ?? []) fn(e); }
on(kind: PhaseEvent['kind'], fn: (e: PhaseEvent) => void) {
const arr = this.listeners.get(kind) ?? [];
arr.push(fn); this.listeners.set(kind, arr);
}
}
export const bus = new EventBus();
```
- **정보 상태:** draft
- **출처 신뢰도:** A
- **검토 이유:** *(P-Reinforce Phase 1 자동 정규화. 본문 검증 필요.)*
### Guard with cooldown
```typescript
export function withCooldown(ms: number) {
let last = 0;
return () => {
const now = Date.now();
if (now - last < ms) return false;
last = now;
return true;
};
}
```
## 🧬 중복 검사 (Duplicate Check)
### Parallel states (movement + weapon)
```typescript
import { setup, createMachine } from 'xstate';
- **기존 유사 문서:** *(TODO: 인덱서 클러스터 리포트 참조)*
- **처리 방식:** UPDATE (자동 정규화)
- **처리 이유:** Phase 1 정규화 — 옛 템플릿/누락 필드 보강.
const player = createMachine({
id: 'player',
type: 'parallel',
states: {
movement: {
initial: 'idle',
states: {
idle: { on: { move: 'running' } },
running: { on: { stop: 'idle' } },
},
},
weapon: {
initial: 'unarmed',
states: {
unarmed: { on: { equip: 'armed' } },
armed: { on: { fire: 'cooldown' } },
cooldown: { after: { 500: 'armed' } },
},
},
},
});
```
## ⚠️ 모순 및 업데이트 (Contradictions & Updates)
### FSM 의 telemetry
```typescript
export function logTransition(from: string, to: string, event: string) {
console.log(JSON.stringify({ ts: Date.now(), kind: 'fsm.transition', from, to, event }));
}
```
- **과거 데이터와의 충돌:** 없음
- **정책 변화:** 없음
## 매 결정 기준
| 상황 | Approach |
|---|---|
| 매 simple 3-state | Hand-rolled enum + switch. |
| 매 hierarchical / parallel | XState v5 + visualizer. |
| 매 networked sync | Authoritative server FSM + delta replication. |
| 매 hot path AI | Behavior Tree (FSM 의 not 적합). |
## 🔗 지식 연결 (Graph)
**기본값**: XState v5 for non-trivial; enum FSM for simple.
- **Parent:** [[10_Wiki/Topics]]
- **Related:** *(TODO: 최소 2개)*
- **Opposite / Trade-off:** *(TODO)*
- **Raw Source:** 직접 입력
## 🔗 Graph
- 부모: [[Fixed Time Step vs Variable Time Step]] · [[Procedural Rhetoric (In Gaming)]]
- 변형: [[Stage-Director-and-World-Tension-Scaling]] · [[Staggered-Firing-Logic-and-Phase-Offset]]
- 응용: [[War-Commander-Combat-Ecosystem]] · [[Sector]]
- Adjacent: [[Player-Experience-Modeling]] · [[Roguelike Procedural Generation]]
## 🕓 변경 이력 (Changelog)
## 🤖 LLM 활용
**언제**: FSM 의 design review, unreachable state 의 detect, transition coverage 의 audit.
**언제 X**: 매 hot loop transition (deterministic code).
| 날짜 | 변경 내용 | 처리 방식 | 신뢰도 |
|------|-----------|-----------|--------|
| 2026-05-08 | P-Reinforce Phase 1 정규화 (frontmatter + 헤더 표준화) | UPDATE | A |
## ❌ 안티패턴
- **Boolean flag soup**: 매 implicit state — combinatorial bug surface.
- **Missing exit action**: 매 leak 의 timer/listener.
- **Unbounded events**: 매 event queue 의 backlog — frame stall.
## 🧪 검증 / 중복
- Verified: XState v5 docs (2025), GDC AI Summit talks, Unreal Behavior Tree docs.
- 신뢰도 A.
## 🕓 Changelog
| 날짜 | 변경 |
|---|---|
| 2026-05-08 | Phase 1 |
| 2026-05-10 | Manual cleanup — XState v5 boss + parallel state + bus 추가 |