feat: add era-based camp soundscapes

src/game/audio/SoundDirector.ts

@@ -380,9 +380,6 @@ export class SoundDirector {
 
   private setLoopTargetVolume(channel: LoopChannel, volume: number) {
     channel.targetVolume = Number.isFinite(volume) ? Math.min(1, Math.max(0, volume)) : channel.defaultVolume;
-    if (channel.current && !channel.transition.active) {
-      channel.current.volume = channel.targetVolume;
-    }
   }
 
   private requestLoopChannel(channel: LoopChannel, key?: string) {

src/game/audio/audioAssets.ts

@@ -1,4 +1,8 @@
 import battlePrepUrl from '../../assets/audio/bgm/battle-prep.mp3';
+import campFrontierUrl from '../../assets/audio/bgm/camp-frontier.mp3';
+import campGrandStrategyUrl from '../../assets/audio/bgm/camp-grand-strategy.mp3';
+import campRallyUrl from '../../assets/audio/bgm/camp-rally.mp3';
+import campWayfarerUrl from '../../assets/audio/bgm/camp-wayfarer.mp3';
 import militiaThemeUrl from '../../assets/audio/bgm/militia-theme.mp3';
 import oathThemeUrl from '../../assets/audio/bgm/oath-theme.mp3';
 import storyDarkUrl from '../../assets/audio/bgm/story-dark.mp3';
@@ -15,13 +19,28 @@ import strategyCastUrl from '../../assets/audio/sfx/strategy-cast.mp3';
 import swordSlashUrl from '../../assets/audio/sfx/sword-slash.mp3';
 import uiSelectUrl from '../../assets/audio/sfx/ui-select.mp3';
 import victoryFanfareUrl from '../../assets/audio/sfx/victory-fanfare.wav';
+import campfireAmbienceUrl from '../../assets/audio/ambience/campfire-ambience.mp3';
+import mountainWindAmbienceUrl from '../../assets/audio/ambience/mountain-wind-ambience.mp3';
+import nanzhongNightAmbienceUrl from '../../assets/audio/ambience/nanzhong-night-ambience.mp3';
+import riverNightAmbienceUrl from '../../assets/audio/ambience/river-night-ambience.mp3';
 
 export const musicTracks = {
   'title-theme': titleThemeUrl,
   'story-dark': storyDarkUrl,
   'oath-theme': oathThemeUrl,
   'militia-theme': militiaThemeUrl,
-  'battle-prep': battlePrepUrl
+  'battle-prep': battlePrepUrl,
+  'camp-rally': campRallyUrl,
+  'camp-wayfarer': campWayfarerUrl,
+  'camp-grand-strategy': campGrandStrategyUrl,
+  'camp-frontier': campFrontierUrl
+} as const;
+
+export const ambienceTracks = {
+  'campfire-ambience': campfireAmbienceUrl,
+  'river-night-ambience': riverNightAmbienceUrl,
+  'mountain-wind-ambience': mountainWindAmbienceUrl,
+  'nanzhong-night-ambience': nanzhongNightAmbienceUrl
 } as const;
 
 export const effectTracks = {
@@ -40,4 +59,5 @@ export const effectTracks = {
 } as const;
 
 export type MusicTrackKey = keyof typeof musicTracks;
+export type AmbienceTrackKey = keyof typeof ambienceTracks;
 export type EffectTrackKey = keyof typeof effectTracks;

src/game/data/campSoundscapes.ts

@@ -0,0 +1,119 @@
+import type { AmbienceTrackKey, MusicTrackKey } from '../audio/audioAssets';
+import type { CampSkinId } from './campSkins';
+
+export type CampMusicGroupId = 'rally' | 'wayfarer' | 'grand-strategy' | 'frontier';
+
+export type CampAmbienceId = 'campfire' | 'river-night' | 'mountain-wind' | 'nanzhong-night';
+
+export type CampMusicTrackKey = Extract<
+  MusicTrackKey,
+  'camp-rally' | 'camp-wayfarer' | 'camp-grand-strategy' | 'camp-frontier'
+>;
+
+export type CampAmbienceTrackKey = Extract<
+  AmbienceTrackKey,
+  'campfire-ambience' | 'river-night-ambience' | 'mountain-wind-ambience' | 'nanzhong-night-ambience'
+>;
+
+export type CampMusicGroupDefinition = {
+  id: CampMusicGroupId;
+  trackKey: CampMusicTrackKey;
+  label: string;
+  volume: number;
+};
+
+export type CampAmbienceDefinition = {
+  id: CampAmbienceId;
+  trackKey: CampAmbienceTrackKey;
+  label: string;
+  volume: number;
+};
+
+export type CampSoundscapeMapping = {
+  musicGroupId: CampMusicGroupId;
+  ambienceId: CampAmbienceId;
+};
+
+export type CampSoundscape = {
+  skinId: CampSkinId;
+  music: CampMusicGroupDefinition;
+  ambience: CampAmbienceDefinition;
+};
+
+export const campMusicGroups: Record<CampMusicGroupId, CampMusicGroupDefinition> = {
+  rally: {
+    id: 'rally',
+    trackKey: 'camp-rally',
+    label: '결의와 출정',
+    volume: 0.22
+  },
+  wayfarer: {
+    id: 'wayfarer',
+    trackKey: 'camp-wayfarer',
+    label: '유랑의 밤',
+    volume: 0.18
+  },
+  'grand-strategy': {
+    id: 'grand-strategy',
+    trackKey: 'camp-grand-strategy',
+    label: '대업의 계책',
+    volume: 0.2
+  },
+  frontier: {
+    id: 'frontier',
+    trackKey: 'camp-frontier',
+    label: '변경과 북벌',
+    volume: 0.2
+  }
+};
+
+export const campAmbienceDefinitions: Record<CampAmbienceId, CampAmbienceDefinition> = {
+  campfire: {
+    id: 'campfire',
+    trackKey: 'campfire-ambience',
+    label: '장작불',
+    volume: 0.12
+  },
+  'river-night': {
+    id: 'river-night',
+    trackKey: 'river-night-ambience',
+    label: '밤의 강물',
+    volume: 0.1
+  },
+  'mountain-wind': {
+    id: 'mountain-wind',
+    trackKey: 'mountain-wind-ambience',
+    label: '산바람',
+    volume: 0.09
+  },
+  'nanzhong-night': {
+    id: 'nanzhong-night',
+    trackKey: 'nanzhong-night-ambience',
+    label: '남중의 밤',
+    volume: 0.11
+  }
+};
+
+export const campSoundscapeMapping: Record<CampSkinId, CampSoundscapeMapping> = {
+  'yellow-turban': { musicGroupId: 'rally', ambienceId: 'campfire' },
+  'anti-dong': { musicGroupId: 'rally', ambienceId: 'campfire' },
+  xuzhou: { musicGroupId: 'wayfarer', ambienceId: 'campfire' },
+  wandering: { musicGroupId: 'wayfarer', ambienceId: 'campfire' },
+  wolong: { musicGroupId: 'wayfarer', ambienceId: 'mountain-wind' },
+  'red-cliffs': { musicGroupId: 'grand-strategy', ambienceId: 'river-night' },
+  'jing-yi': { musicGroupId: 'grand-strategy', ambienceId: 'river-night' },
+  'hanzhong-shuhan': { musicGroupId: 'grand-strategy', ambienceId: 'mountain-wind' },
+  'jingzhou-crisis': { musicGroupId: 'grand-strategy', ambienceId: 'river-night' },
+  'yiling-baidi': { musicGroupId: 'grand-strategy', ambienceId: 'river-night' },
+  nanzhong: { musicGroupId: 'frontier', ambienceId: 'nanzhong-night' },
+  northern: { musicGroupId: 'frontier', ambienceId: 'mountain-wind' }
+};
+
+export function getCampSoundscape(skinId: CampSkinId): CampSoundscape {
+  const mapping = campSoundscapeMapping[skinId];
+  return {
+    skinId,
+    music: campMusicGroups[mapping.musicGroupId],
+    ambience: campAmbienceDefinitions[mapping.ambienceId]
+  };
+}

src/game/scenes/CampScene.ts

@@ -16,6 +16,7 @@ import { compareUnitStrategyCoverage, getUnitStrategyCoverage, getUnitStrategyNa
 import { getUnitClass, terrainRules, type TerrainType, type UnitClassKey } from '../data/battleRules';
 import { defaultBattleScenario, getBattleScenario, type BattleScenarioDefinition, type BattleScenarioId } from '../data/battles';
 import { getSortieFlow } from '../data/campaignFlow';
+import { getCampSoundscape, type CampSoundscape } from '../data/campSoundscapes';
 import {
   campaignPortraitKeysByUnitId,
   portraitAssetEntriesForKey,
@@ -11070,6 +11071,7 @@ export class CampScene extends Phaser.Scene {
   private campSkinSeal?: Phaser.GameObjects.Arc;
   private campSkinBadge?: Phaser.GameObjects.Rectangle;
   private campSkinSummary?: Phaser.GameObjects.Text;
+  private campSoundscape?: CampSoundscape;
   private campSkinRenderedTextureKey?: string;
   private campSkinUsedFallback = false;
   private campSkinTransitionRevision = 0;
@@ -11206,6 +11208,7 @@ export class CampScene extends Phaser.Scene {
       nextBattleId: sortieFlow.nextBattleId,
       currentBattleId: this.currentCampBattleId()
     });
+    this.campSoundscape = getCampSoundscape(this.campSkinSelection.skin.id);
     this.campSkinBackdrop = undefined;
     this.campSkinWash = undefined;
     this.campSkinVignette = undefined;
@@ -11223,7 +11226,12 @@ export class CampScene extends Phaser.Scene {
     this.sortieItemAssignments = this.normalizedSortieItemAssignments(this.campaign.sortieItemAssignments);
     this.selectedDialogueId = this.availableCampDialogues()[0]?.id ?? campDialogues[0].id;
     this.selectedVisitId = this.availableCampVisits()[0]?.id ?? campVisits[0].id;
-    soundDirector.playMusic('militia-theme');
+    soundDirector.playSoundscape({
+      musicKey: this.campSoundscape.music.trackKey,
+      ambienceKey: this.campSoundscape.ambience.trackKey,
+      musicVolume: this.campSoundscape.music.volume,
+      ambienceVolume: this.campSoundscape.ambience.volume
+    });
     this.input.keyboard?.on('keydown-ESC', () => this.handleEscapeKey());
     this.input.keyboard?.on('keydown-ENTER', (event: KeyboardEvent) => this.handleSortieEnterKey(event));
     this.input.keyboard?.on('keydown', (event: KeyboardEvent) => this.handleSaveSlotKey(event));
@@ -21673,6 +21681,20 @@ export class CampScene extends Phaser.Scene {
       campaignProgress: this.campaignTimelineProgress(),
       campBattleId: this.currentCampBattleId(),
       campTitle: this.currentCampTitle(),
+      campSoundscape: this.campSoundscape
+        ? {
+            skinId: this.campSoundscape.skinId,
+            musicGroupId: this.campSoundscape.music.id,
+            musicKey: this.campSoundscape.music.trackKey,
+            musicLabel: this.campSoundscape.music.label,
+            musicVolume: this.campSoundscape.music.volume,
+            ambienceId: this.campSoundscape.ambience.id,
+            ambienceKey: this.campSoundscape.ambience.trackKey,
+            ambienceLabel: this.campSoundscape.ambience.label,
+            ambienceVolume: this.campSoundscape.ambience.volume
+          }
+        : null,
+      audio: soundDirector.getDebugState(),
       campSkin: this.campSkinSelection
         ? {
             id: this.campSkinSelection.skin.id,