Yesod: self-hosted WebXR rooms

Start a room in a world and hang out in VR from the headset's browser:
A-Frame + Networked-A-Frame over EasyRTC, with a coturn relay that can hide
everyone's IP address. Ships with the Campfire, Temple, Cabin, Balcony and
Test room worlds.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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diff --git a/public/index.html b/public/index.html
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+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Yesod</title>
+  <meta name="description" content="Shared rooms in VR.">
+  <style>
+    /* Browser-default monospace, centered. */
+    #lobby, #hud, #banner { font-family: monospace; }
+    input, button, select { font: inherit; }
+
+    #lobby { position: fixed; inset: 0; z-index: 10; overflow-y: auto; padding: 1em; box-sizing: border-box; background: Canvas; color: CanvasText; text-align: center; }
+    #lobby pre { margin: 1.5em 0; }
+    #lobby form, #rooms-view { display: flex; flex-direction: column; align-items: center; gap: 1.6em; margin: 1.6em 0; }
+    #lobby fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
+    #lobby label.field, #lobby legend { display: block; margin: 0 auto 0.6em; padding: 0; }
+    #lobby input[type="text"], #lobby input[type="password"] { width: 22ch; padding: 0.35em 0.5em; }
+    #lobby p { margin: 0; }
+    #lobby .heading { font-weight: bold; }
+    #lobby button { padding: 0.45em 1.4em; }
+    #lobby button.primary { padding: 0.45em 2em; }
+    .buttons button + button { margin-left: 0.6em; }
+    #password-hint { color: GrayText; }
+    .error { color: #b00020; }
+    #setup-error { margin: -0.6em 0 0; }
+
+    .choice { position: relative; cursor: pointer; }
+    .choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
+    .choice:has(input:focus-visible) { outline: 1px dotted CanvasText; outline-offset: 3px; }
+
+    /* Avatar, world and mode tiles: a thin frame on hover, a dark one when chosen. */
+    .avatars .choice, .worlds .choice, .modes .choice { display: flex; flex-direction: column; align-items: center; border: 1px solid transparent; }
+    .avatars .choice:hover, .worlds .choice:hover, .modes .choice:hover { border-color: #ccc; }
+    .avatars .choice:has(input:checked), .worlds .choice:has(input:checked), .modes .choice:has(input:checked) { border-color: CanvasText; }
+
+    .avatars { display: grid; grid-template-columns: repeat(4, 9em); gap: 0.6em; justify-content: center; }
+    .avatars .choice { gap: 0.4em; padding: 0.5em 0.2em; }
+    .avatars img { width: 7em; height: 7em; background: #eee; }
+
+    .worlds { display: flex; flex-wrap: wrap; gap: 0.6em; justify-content: center; }
+    .worlds .choice { width: 16em; gap: 0.3em; padding: 0.5em; }
+    .worlds img { width: 16em; height: 9em; object-fit: cover; background: #eee; margin-bottom: 0.2em; }
+    .worlds span, .modes span { color: GrayText; font-size: 0.9em; }
+
+    .modes { display: flex; flex-wrap: wrap; gap: 0.6em; justify-content: center; }
+    .modes .choice { width: 16em; gap: 0.4em; padding: 0.8em 0.6em; }
+    .modes svg { width: 3em; height: 2em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
+
+    .toggle { display: flex; flex-direction: column; align-items: center; gap: 0.4em; max-width: 30em; }
+    .toggle label { cursor: pointer; }
+    .toggle input { margin: 0 0.4em 0 0; vertical-align: -0.1em; }
+    .toggle span { color: GrayText; font-size: 0.9em; }
+
+    .colors { display: flex; gap: 0.8em; justify-content: center; }
+    .colors .choice span { display: block; width: 1.8em; height: 1.8em; border-radius: 50%; border: 1px solid rgba(0, 0, 0, 0.25); }
+    .colors .choice:has(input:checked) span { outline: 2px solid CanvasText; outline-offset: 2px; }
+
+    /* Open rooms: picture, what and who, and a Join button. */
+    .rooms { list-style: none; margin: 0; padding: 0; width: min(36em, 100%); }
+    .rooms li { display: flex; align-items: center; gap: 1em; padding: 0.7em 0; border-top: 1px solid #ddd; text-align: left; }
+    .rooms li:last-child { border-bottom: 1px solid #ddd; }
+    .rooms img { width: 7em; height: 3.9em; object-fit: cover; background: #eee; flex: none; }
+    .rooms .about { flex: 1; min-width: 0; line-height: 1.5; }
+    .rooms .about span { display: block; color: GrayText; overflow-wrap: anywhere; }
+    .rooms svg { width: 0.85em; height: 0.85em; margin-left: 0.4em; vertical-align: -0.05em; fill: none; stroke: currentColor; stroke-width: 2.5; }
+    .rooms button { flex: none; }
+
+    /* "My screen": what you're sharing, its sound, and who's here. */
+    #share-view { display: flex; flex-direction: column; align-items: center; gap: 1.2em; margin: 1.6em 0; }
+    #share-preview { width: min(36em, 100%); aspect-ratio: 16 / 9; background: #000; }
+    #share-status, #share-people { color: GrayText; }
+    #sound-field { display: flex; flex-direction: column; align-items: center; gap: 0.5em; max-width: 34em; }
+    #share-sound { max-width: min(30em, 90vw); padding: 0.3em; }
+    #sound-hint { color: GrayText; font-size: 0.9em; }
+
+    #hud { position: fixed; left: 1em; bottom: 1em; z-index: 10; }
+    #hud p, #banner { display: table; margin: 0.4em 0; padding: 0.2em 0.5em; background: Canvas; color: CanvasText; }
+    #hud button { margin-right: 0.4em; padding: 0.3em 0.9em; }
+    #banner { position: fixed; z-index: 20; top: 1em; left: 50%; transform: translateX(-50%); }
+    .vr-only, body.xr-capable .desktop-only { display: none !important; }
+    body.xr-capable .vr-only { display: table !important; }
+    /* A white ring and dot, outlined in black so it shows on light and dark alike. */
+    #crosshair { position: fixed; z-index: 10; top: 50%; left: 50%; box-sizing: border-box; width: 18px; height: 18px; margin: -9px 0 0 -9px; border: 2px solid #fff; border-radius: 50%; box-shadow: 0 0 0 1.5px rgba(0, 0, 0, 0.8), inset 0 0 0 1.5px rgba(0, 0, 0, 0.8); pointer-events: none; }
+    #crosshair::after { content: ''; position: absolute; top: 50%; left: 50%; width: 4px; height: 4px; margin: -2px 0 0 -2px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 1.5px rgba(0, 0, 0, 0.8); }
+    [hidden] { display: none !important; }
+
+    @media (max-width: 40em) { .avatars { grid-template-columns: repeat(3, 9em); } }
+    @media (max-width: 30em) {
+      .avatars { grid-template-columns: repeat(2, 9em); }
+      .rooms img { width: 4.5em; height: 4.5em; }
+    }
+  </style>
+
+  <!-- Everything is served from this server; no third-party CDNs. -->
+  <script>window.AFRAME_CDN_ROOT = new URL('assets/aframe/', location.href).href;</script>
+  <script src="vendor/aframe-1.7.1.min.js"></script>
+  <script src="socket.io/socket.io.min.js"></script>
+  <script src="easyrtc/easyrtc.js"></script>
+  <script src="vendor/networked-aframe-0.14.3.min.js"></script>
+
+  <script src="js/world.js"></script>
+  <script src="js/components/player-info.js"></script>
+  <script src="js/components/voice-level.js"></script>
+  <script src="js/components/nametag.js"></script>
+  <script src="js/components/vrm-avatar.js"></script>
+  <script src="js/components/locomotion.js"></script>
+  <script src="js/components/wield.js"></script>
+  <script src="js/components/hand-tilt.js"></script>
+  <script src="js/components/campsite.js"></script>
+  <script src="js/components/temple.js"></script>
+  <script src="js/components/testroom.js"></script>
+  <script src="js/components/cabin.js"></script>
+  <script src="js/components/balcony.js"></script>
+  <script src="js/components/chess.js"></script>
+  <script src="js/components/screens.js"></script>
+  <script src="js/share.js"></script>
+  <script src="js/astro.js"></script>
+  <script src="js/components/sky.js"></script>
+  <script src="js/components/ambience.js"></script>
+  <script src="js/schemas.js"></script>
+</head>
+<body>
+  <main id="lobby">
+<pre>
+---+---+---+---+---+---+---+---
+
+<b id="site-name">Yesod</b>
+</pre>
+
+    <section id="rooms-view">
+      <p class="heading">Open rooms</p>
+      <ul id="room-list" class="rooms"></ul>
+      <p id="no-rooms" hidden>No one's in a room right now.</p>
+      <p id="rooms-error" class="error" role="alert" hidden></p>
+      <button id="start-btn" class="primary" type="button">Start a room</button>
+    </section>
+
+    <form id="setup-form" autocomplete="off" hidden>
+      <p id="setup-title" class="heading"></p>
+
+      <fieldset id="world-field">
+        <legend>World</legend>
+        <div id="world-grid" class="worlds"></div>
+      </fieldset>
+
+      <fieldset id="mode-field">
+        <legend>Who can come</legend>
+        <div class="modes">
+          <label class="choice"><input type="radio" name="mode" value="open" aria-label="Open room">
+            <svg viewBox="0 0 48 32" aria-hidden="true"><circle cx="16" cy="9" r="5"/><path d="M6 29c0-6 4.5-10 10-10s10 4 10 10"/><circle cx="33" cy="10" r="4.5"/><path d="M28 19.5c1.5-.7 3.2-1 5-1 5.5 0 9 3.8 9 10.5"/></svg>
+            <b>Open room</b><span>Listed here so anyone can join. Add a password to keep it to people you tell.</span></label>
+          <label class="choice"><input type="radio" name="mode" value="solo" aria-label="Just me">
+            <svg viewBox="0 0 48 32" aria-hidden="true"><circle cx="24" cy="9" r="5"/><path d="M14 29c0-6 4.5-10 10-10s10 4 10 10"/></svg>
+            <b>Just me</b><span>Runs on this device only. Nothing is listed or shared.</span></label>
+        </div>
+      </fieldset>
+
+      <fieldset id="as-field" hidden>
+        <legend>Join as</legend>
+        <div class="modes">
+          <label class="choice"><input type="radio" name="as" value="me" aria-label="Me">
+            <svg viewBox="0 0 48 32" aria-hidden="true"><circle cx="24" cy="9" r="5"/><path d="M14 29c0-6 4.5-10 10-10s10 4 10 10"/></svg>
+            <b>Me</b><span>With an avatar, in a headset or on this computer.</span></label>
+          <label class="choice"><input type="radio" name="as" value="screen" aria-label="My screen">
+            <svg viewBox="0 0 48 32" aria-hidden="true"><rect x="9" y="3" width="30" height="19" rx="1.5"/><path d="M24 22v5M17 29h14"/></svg>
+            <b>My screen</b><span>Show a screen, window or tab from this computer on a big screen in the room.</span></label>
+        </div>
+      </fieldset>
+
+      <div id="password-field">
+        <label class="field" for="password">Password <span id="password-hint">(optional)</span></label>
+        <input id="password" name="password" type="password" maxlength="64" autocapitalize="none" spellcheck="false">
+      </div>
+
+      <div id="name-field">
+        <label class="field" for="name">Name</label>
+        <input id="name" name="name" type="text" maxlength="20">
+      </div>
+
+      <fieldset id="avatar-field">
+        <legend>Avatar</legend>
+        <div id="avatar-grid" class="avatars"></div>
+      </fieldset>
+
+      <fieldset id="color-field">
+        <legend>Color</legend>
+        <div id="color-row" class="colors"></div>
+      </fieldset>
+
+      <div id="hide-ip-field" class="toggle" hidden>
+        <label><input id="hide-ip" name="hideIp" type="checkbox"> Hide my IP address</label>
+        <span>Your voice and movement go through this server, so others in the room only see its address. Turn off for a little less delay.</span>
+      </div>
+
+      <p id="setup-error" class="error" role="alert" hidden></p>
+      <p class="buttons"><button id="back-btn" type="button">Back</button> <button id="go-btn" class="primary" type="submit"></button></p>
+    </form>
+
+    <section id="share-view" hidden>
+      <p id="share-title" class="heading"></p>
+      <video id="share-preview" muted playsinline autoplay hidden></video>
+      <p id="share-status" role="status"></p>
+      <p class="buttons"><button id="share-btn" class="primary" type="button">Share screen</button> <button id="stop-share-btn" type="button" hidden>Stop sharing</button></p>
+      <div id="sound-field" hidden>
+        <label for="share-sound">Sound</label>
+        <select id="share-sound"></select>
+        <button id="sound-btn" type="button">Choose a sound input…</button>
+        <span id="sound-hint"></span>
+      </div>
+      <p id="share-people">No one else here</p>
+      <p class="buttons"><button id="share-leave-btn" type="button">Leave</button></p>
+    </section>
+
+<pre>
+---+---+---+---+---+---+---+---
+</pre>
+  </main>
+
+  <div id="hud" hidden>
+    <p><button id="vr-btn" type="button" hidden>Enter VR</button> <button id="mic-btn" type="button" aria-pressed="false">Mic on</button> <button id="link-btn" type="button" hidden>Copy link</button> <button id="leave-btn" type="button">Leave</button></p>
+    <p id="people" hidden>No one else here</p>
+    <p class="desktop-only">Click to look · Esc to free mouse · WASD walk · Space jump · C sit/stand · M mute<span class="world-action" hidden> · V <span></span></span><span class="world-tools" hidden> · F pick up · hold click to draw · Backspace erase your last line</span><span class="world-chess" hidden> · F pick up a chess piece, F again to put it where you look</span><span class="screen-hint" hidden> · G move a screen, scroll to resize it</span></p>
+    <p class="vr-only">Left stick walk · right stick turn · A jump · X sit/stand · Y/B mute<span class="world-action" hidden> · reach for the <span></span>, then trigger</span><span class="world-tools" hidden> · grip to hold · trigger to draw · empty hand + trigger to erase</span><span class="world-chess" hidden> · grip to pick up a chess piece</span><span class="screen-hint" hidden> · point at a screen and grip to move it, grip with your other hand too to resize</span></p>
+  </div>
+
+  <p id="banner" role="status" hidden></p>
+  <div id="crosshair" hidden></div>
+
+  <a-scene
+    networked-scene="app: yesod; room: lobby; adapter: easyrtc; audio: true; connectOnLoad: false; debug: false"
+    renderer="antialias: true; colorManagement: true; foveationLevel: 1"
+    background="color: #000000"
+    loading-screen="enabled: false"
+    xr-mode-ui="enabled: false"
+  >
+    <a-assets timeout="30000">
+      <!-- Remote people: the rig carries who they are and their avatar body. -->
+      <template id="rig-template">
+        <a-entity vrm-avatar></a-entity>
+      </template>
+
+      <!-- Remote head: voice comes from here, name floats above it. -->
+      <template id="head-template">
+        <a-entity class="remote-head" voice-level networked-audio-source="refDistance: 2; rolloffFactor: 0.7; distanceModel: inverse">
+          <a-entity nametag position="0 0.42 0"></a-entity>
+        </a-entity>
+      </template>
+    </a-assets>
+
+    <!-- The world you pick is added from its template (see worlds.json), so the
+         lobby doesn't download worlds nobody chose. -->
+
+    <!-- You. Your own body is hidden from yourself; others see your avatar. -->
+    <a-entity id="rig" player-info locomotion wield screens
+              networked="template: #rig-template; attachTemplateToLocal: false">
+      <a-entity id="player" camera="near: 0.05" position="0 1.6 0"
+                look-controls="pointerLockEnabled: true; magicWindowTrackingEnabled: false"
+                networked="template: #head-template; attachTemplateToLocal: false"></a-entity>
+      <a-entity id="left-hand" hand-tilt
+                networked-hand-controls="hand: left; handModelStyle: lowPoly"
+                networked="template: #left-hand-default-template">
+        <a-text id="wrist-text" value="" align="center" width="0.5" color="#ffe2c4"
+                position="0 0.06 0.06" rotation="-30 0 0"></a-text>
+      </a-entity>
+      <a-entity id="right-hand" hand-tilt
+                networked-hand-controls="hand: right; handModelStyle: lowPoly"
+                networked="template: #right-hand-default-template"></a-entity>
+    </a-entity>
+  </a-scene>
+
+  <template id="world-campfire">
+    <!-- Away from the fire it's nearly dark; the sky brightens these when the Moon is up. -->
+    <a-entity id="ambient-light" light="type: hemisphere; color: #6a79a8; groundColor: #1c2416; intensity: 0.025"></a-entity>
+    <a-entity id="moon-light" light="type: directional; color: #b9c6ff; intensity: 0.02" position="-20 30 -12"></a-entity>
+    <a-entity id="sky" sky></a-entity>
+    <a-entity id="ambience" ambience></a-entity>
+    <a-entity id="campsite" campsite data-world="campsite"></a-entity>
+  </template>
+
+  <template id="world-temple">
+    <a-entity id="ambient-light" light="type: hemisphere; color: #8a7a68; groundColor: #1a1410; intensity: 0.12"></a-entity>
+    <a-entity id="moon-light" light="type: directional; color: #b9c6ff; intensity: 0.02" position="-20 30 -12"></a-entity>
+    <!-- The temple comes before the sky so it can point the sky toward Boleskine. -->
+    <a-entity id="temple" temple="fireSound: assets/sounds/fire.ogg" data-world="temple"></a-entity>
+    <a-entity id="sky" sky></a-entity>
+  </template>
+
+  <template id="world-cabin">
+    <!-- The fire does most of the lighting; the sky keeps the real Moon in the window. -->
+    <a-entity id="ambient-light" light="type: hemisphere; color: #8a6e58; groundColor: #2a1c12; intensity: 0.22"></a-entity>
+    <a-entity id="moon-light" light="type: directional; color: #b9c6ff; intensity: 0.02" position="0 10 -30"></a-entity>
+    <a-entity id="sky" sky="pinMoon: true; moonBearing: 175; moonAltitude: 7; moonSize: 2.5"></a-entity>
+    <a-entity id="cabin" cabin="fireSound: assets/sounds/fire.ogg" data-world="cabin">
+      <!-- The cabin builds the chess table and its chairs around wherever the board is. -->
+      <a-entity chess="table: 0.4; height: 0.62" position="0.6 0.62 0"></a-entity>
+    </a-entity>
+  </template>
+
+  <template id="world-balcony">
+    <!-- An overcast day: soft light from everywhere, a little more from above. -->
+    <a-entity light="type: hemisphere; color: #e2e7ec; groundColor: #6d7276; intensity: 1.6"></a-entity>
+    <a-entity light="type: directional; color: #f4f2ee; intensity: 0.5" position="-3 10 -4"></a-entity>
+    <a-entity id="balcony" balcony="windSound: assets/sounds/wind.ogg" data-world="balcony"></a-entity>
+  </template>
+
+  <template id="world-testroom">
+    <a-entity light="type: hemisphere; color: #ffffff; groundColor: #ececec; intensity: 2.2"></a-entity>
+    <a-entity light="type: directional; color: #ffffff; intensity: 1.2" position="1.5 3 2"></a-entity>
+    <a-entity id="testroom" testroom data-world="testroom">
+      <a-entity chess position="0 0.75 0"></a-entity>
+    </a-entity>
+  </template>
+
+  <script src="js/app.js"></script>
+</body>
+</html>