Add audio

app/page.tsx

@@ -9,6 +9,7 @@ import { ObserverControls } from "@/src/components/ObserverControls";
 import { InspectorControls } from "@/src/components/InspectorControls";
 import { SettingsProvider } from "@/src/components/SettingsProvider";
 import { ObserverCamera } from "@/src/components/ObserverCamera";
+import { AudioProvider } from "@/src/components/AudioContext";
 
 // three.js has its own loaders for textures and models, but we need to load other
 // stuff too, e.g. missions, terrains, and more. This client is used for those.
@@ -35,9 +36,11 @@ function MapInspector() {
       <main>
         <SettingsProvider>
           <Canvas shadows>
-            <ObserverControls />
-            <Mission key={missionName} name={missionName} />
-            <ObserverCamera />
+            <AudioProvider>
+              <ObserverControls />
+              <Mission key={missionName} name={missionName} />
+              <ObserverCamera />
+            </AudioProvider>
             <EffectComposer>
               <N8AO intensity={3} aoRadius={3} quality="performance" />
             </EffectComposer>

src/components/AudioContext.tsx

@@ -0,0 +1,66 @@
+import {
+  createContext,
+  useContext,
+  useEffect,
+  useState,
+  ReactNode,
+} from "react";
+import { useThree } from "@react-three/fiber";
+import { AudioListener, AudioLoader } from "three";
+
+interface AudioContextType {
+  audioLoader: AudioLoader | null;
+  audioListener: AudioListener | null;
+}
+
+const AudioContext = createContext<AudioContextType | undefined>(undefined);
+
+/**
+ * AudioProvider initializes the AudioLoader and AudioListener for spatial audio.
+ * Must be rendered inside the Canvas component.
+ */
+export function AudioProvider({ children }: { children: ReactNode }) {
+  const { camera } = useThree();
+  const [audioContext, setAudioContext] = useState<AudioContextType>({
+    audioLoader: null,
+    audioListener: null,
+  });
+
+  useEffect(() => {
+    // Create audio loader
+    const audioLoader = new AudioLoader();
+
+    // Create listener if not already present
+    let listener = camera.children.find(
+      (child) => child instanceof AudioListener
+    ) as AudioListener | undefined;
+
+    if (!listener) {
+      listener = new AudioListener();
+      camera.add(listener);
+    }
+
+    setAudioContext({
+      audioLoader,
+      audioListener: listener,
+    });
+  }, [camera]);
+
+  return (
+    <AudioContext.Provider value={audioContext}>
+      {children}
+    </AudioContext.Provider>
+  );
+}
+
+/**
+ * Hook to access audio resources (AudioLoader and AudioListener).
+ * Must be used within an AudioProvider.
+ */
+export function useAudio(): AudioContextType {
+  const context = useContext(AudioContext);
+  if (context === undefined) {
+    throw new Error("useAudio must be used within AudioProvider");
+  }
+  return context;
+}

src/components/AudioEmitter.tsx

@@ -0,0 +1,147 @@
+import { useEffect, useRef } from "react";
+import { useThree } from "@react-three/fiber";
+import { PositionalAudio, Audio } from "three";
+import { ConsoleObject, getPosition, getProperty } from "../mission";
+import { audioToUrl } from "../loaders";
+import { useAudio } from "./AudioContext";
+import { useSettings } from "./SettingsProvider";
+
+export function AudioEmitter({ object }: { object: ConsoleObject }) {
+  const fileName = getProperty(object, "fileName")?.value ?? "";
+  const volume = parseFloat(getProperty(object, "volume")?.value ?? "1");
+  const minDistance = parseFloat(
+    getProperty(object, "minDistance")?.value ?? "1"
+  );
+  const maxDistance = parseFloat(
+    getProperty(object, "maxDistance")?.value ?? "1"
+  );
+  const minLoopGap = parseFloat(
+    getProperty(object, "minLoopGap")?.value ?? "0"
+  );
+  const maxLoopGap = parseFloat(
+    getProperty(object, "maxLoopGap")?.value ?? "0"
+  );
+  const is3D = parseInt(getProperty(object, "is3D")?.value ?? "0");
+
+  const [z, y, x] = getPosition(object);
+  const { scene } = useThree();
+  const { audioLoader, audioListener } = useAudio();
+  const { audioEnabled } = useSettings();
+  const soundRef = useRef<PositionalAudio | null>(null);
+  const loopTimerRef = useRef<NodeJS.Timeout | null>(null);
+  const loopGapIntervalRef = useRef<NodeJS.Timeout | null>(null);
+
+  useEffect(() => {
+    if (!fileName || !audioLoader || !audioListener || !audioEnabled) {
+      if (!fileName) {
+        console.warn("AudioEmitter: No fileName provided");
+      }
+      if (!audioLoader) {
+        console.warn("AudioEmitter: No audio loader available");
+      }
+      if (!audioListener) {
+        console.warn("AudioEmitter: No audio listener available");
+      }
+      return;
+    }
+
+    const audioUrl = audioToUrl(fileName);
+
+    let sound;
+
+    // Configure distance properties
+    if (is3D) {
+      sound = new PositionalAudio(audioListener);
+      sound.position.set(x - 1024, y, z - 1024);
+      sound.setDistanceModel("exponential");
+      sound.setRefDistance(minDistance / 25);
+      sound.setMaxDistance(maxDistance / 50);
+      sound.setVolume(volume);
+    } else {
+      sound = new Audio(audioListener);
+      sound.setVolume(Math.min(volume, 0.5));
+    }
+
+    soundRef.current = sound;
+
+    // Setup looping with gap
+    const setupLooping = () => {
+      if (minLoopGap > 0 || maxLoopGap > 0) {
+        const gapMin = Math.max(0, minLoopGap);
+        const gapMax = Math.max(gapMin, maxLoopGap);
+        const gap =
+          gapMin === gapMax
+            ? gapMin
+            : Math.random() * (gapMax - gapMin) + gapMin;
+
+        sound.loop = false;
+
+        // Check periodically when audio ends. onEnded wasn't working
+        const checkLoop = () => {
+          if (sound.isPlaying === false) {
+            loopTimerRef.current = setTimeout(() => {
+              try {
+                sound.play();
+                setupLooping();
+              } catch (err) {}
+            }, gap);
+          } else {
+            loopGapIntervalRef.current = setTimeout(checkLoop, 100);
+          }
+        };
+        loopGapIntervalRef.current = setTimeout(checkLoop, 100);
+      } else {
+        sound.setLoop(true);
+      }
+    };
+
+    // Load and play audio
+    audioLoader.load(
+      audioUrl,
+      (audioBuffer: any) => {
+        sound.setBuffer(audioBuffer);
+
+        try {
+          sound.play();
+          setupLooping();
+        } catch (err) {}
+      },
+      undefined,
+      (err: any) => {}
+    );
+
+    // Add to scene
+    scene.add(sound);
+
+    return () => {
+      if (loopTimerRef.current) {
+        clearTimeout(loopTimerRef.current);
+      }
+      if (loopGapIntervalRef.current) {
+        clearTimeout(loopGapIntervalRef.current);
+      }
+      try {
+        sound.stop();
+      } catch (e) {
+        // May fail if already stopped
+      }
+      sound.disconnect();
+      scene.remove(sound);
+    };
+  }, [
+    fileName,
+    volume,
+    minLoopGap,
+    maxLoopGap,
+    is3D,
+    minDistance,
+    maxDistance,
+    audioLoader,
+    audioListener,
+    audioEnabled,
+    scene,
+  ]);
+
+  // Render debug visualization and invisible marker
+  return null;
+}

src/components/InspectorControls.tsx

@@ -27,6 +27,8 @@ export function InspectorControls({
     setSpeedMultiplier,
     fov,
     setFov,
+    audioEnabled,
+    setAudioEnabled,
   } = useSettings();
 
   return (
@@ -56,6 +58,17 @@ export function InspectorControls({
         />
         <label htmlFor="fogInput">Fog?</label>
       </div>
+      <div className="CheckboxField">
+        <input
+          id="audioInput"
+          type="checkbox"
+          checked={audioEnabled}
+          onChange={(event) => {
+            setAudioEnabled(event.target.checked);
+          }}
+        />
+        <label htmlFor="audioInput">Audio?</label>
+      </div>
       <div className="Field">
         <label htmlFor="fovInput">FOV</label>
         <input

src/components/SettingsProvider.tsx

@@ -6,6 +6,7 @@ type PersistedSettings = {
   fogEnabled?: boolean;
   speedMultiplier?: number;
   fov?: number;
+  audioEnabled?: boolean;
 };
 
 export function useSettings() {
@@ -16,6 +17,7 @@ export function SettingsProvider({ children }: { children: React.ReactNode }) {
   const [fogEnabled, setFogEnabled] = useState(true);
   const [speedMultiplier, setSpeedMultiplier] = useState(1);
   const [fov, setFov] = useState(90);
+  const [audioEnabled, setAudioEnabled] = useState(false);
 
   const value = useMemo(
     () => ({
@@ -25,8 +27,10 @@ export function SettingsProvider({ children }: { children: React.ReactNode }) {
       setSpeedMultiplier,
       fov,
       setFov,
+      audioEnabled,
+      setAudioEnabled,
     }),
-    [fogEnabled, speedMultiplier, fov]
+    [fogEnabled, speedMultiplier, fov, audioEnabled]
   );
 
   // Read persisted settings from localStoarge.

src/components/renderObject.tsx

@@ -9,8 +9,10 @@ import { TSStatic } from "./TSStatic";
 import { StaticShape } from "./StaticShape";
 import { Item } from "./Item";
 import { Turret } from "./Turret";
+import { AudioEmitter } from "./AudioEmitter";
 
 const componentMap = {
+  AudioEmitter,
   InteriorInstance,
   Item,
   SimGroup,

src/loaders.ts

@@ -58,6 +58,10 @@ export function textureToUrl(name: string) {
   }
 }
 
+export function audioToUrl(fileName: string) {
+  return getUrlForPath(`audio/${fileName}`);
+}
+
 export async function loadDetailMapList(name: string) {
   const url = getUrlForPath(`textures/${name}`);
   const res = await fetch(url);