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>

1 files changed, 85 insertions, 0 deletions

diff --git a/tools/portraits/render.html b/tools/portraits/render.html
new file mode 100644
index 0000000..8e0a26e
--- /dev/null
+++ b/tools/portraits/render.html
@@ -0,0 +1,85 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>render</title>
+<body style="margin:0">
+<script src="/vendor/aframe-1.7.1.min.js"></script>
+<script>
+// Renders a transparent head-and-torso portrait of each avatar, arms relaxed,
+// three-quarter view, and POSTs each PNG back to the helper server.
+const SLUGS = (new URLSearchParams(location.search).get('slugs') ||
+  'oldmoustache,bigbro,lilbro,teddy,froggy,astronaut,polybot,wizzir').split(',');
+const SIZE = 384;
+
+const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true, preserveDrawingBuffer: true });
+renderer.setPixelRatio(1);
+renderer.setSize(SIZE, SIZE);
+renderer.outputColorSpace = THREE.SRGBColorSpace;
+renderer.setClearColor(0x000000, 0);
+document.body.appendChild(renderer.domElement);
+
+const loader = new THREE.GLTFLoader();
+const load = (url) => new Promise((res, rej) => loader.load(url, res, undefined, rej));
+
+function relaxArms(bone) {
+  const shoulder = new THREE.Vector3(), wrist = new THREE.Vector3(), q = new THREE.Quaternion(), pq = new THREE.Quaternion();
+  for (const [side, sign] of [['left', -1], ['right', 1]]) {
+    const upper = bone(`${side}UpperArm`), hand = bone(`${side}Hand`);
+    if (!upper || !hand) continue;
+    upper.getWorldPosition(shoulder);
+    hand.getWorldPosition(wrist);
+    const from = wrist.sub(shoulder).normalize();
+    const to = new THREE.Vector3(sign * 0.28, -1, -0.12).normalize();
+    q.setFromUnitVectors(from, to);
+    const world = upper.getWorldQuaternion(new THREE.Quaternion()).premultiply(q);
+    upper.parent.getWorldQuaternion(pq).invert();
+    upper.quaternion.copy(pq).multiply(world);
+    upper.updateMatrixWorld(true);
+  }
+}
+
+async function renderOne(slug) {
+  const gltf = await load(`/assets/avatars/${slug}.vrm`);
+  const vrm = gltf.parser.json.extensions.VRM;
+  const nodes = new Map();
+  gltf.scene.traverse((o) => {
+    const a = gltf.parser.associations.get(o);
+    if (a && a.nodes !== undefined) nodes.set(a.nodes, o);
+    if (o.isMesh) o.frustumCulled = false;
+  });
+  const bone = (name) => {
+    const hb = vrm.humanoid.humanBones.find((b) => b.bone === name);
+    return hb ? nodes.get(hb.node) : null;
+  };
+
+  const scene = new THREE.Scene();
+  scene.add(gltf.scene);
+  scene.add(new THREE.HemisphereLight(0xffffff, 0x444444, 2));
+  gltf.scene.updateMatrixWorld(true);
+  relaxArms(bone);
+
+  const top = new THREE.Box3().setFromObject(gltf.scene).max.y;
+  const hips = bone('hips').getWorldPosition(new THREE.Vector3()).y;
+  const bottom = hips - (top - hips) * 0.05;
+  const centerY = (top + bottom) / 2;
+  const height = (top - bottom) * 1.2;
+
+  const camera = new THREE.PerspectiveCamera(28, 1, 0.01, 100);
+  const dist = (height / 2) / Math.tan(THREE.MathUtils.degToRad(14));
+  const yaw = THREE.MathUtils.degToRad(22);
+  camera.position.set(Math.sin(yaw) * dist, centerY + height * 0.04, -Math.cos(yaw) * dist);
+  camera.lookAt(0, centerY, 0);
+
+  renderer.render(scene, camera);
+  const blob = await new Promise((res) => renderer.domElement.toBlob(res, 'image/png'));
+  await fetch(`/save/${slug}`, { method: 'POST', body: blob });
+}
+
+(async () => {
+  const results = {};
+  for (const slug of SLUGS) {
+    try { await renderOne(slug); results[slug] = 'ok'; } catch (e) { results[slug] = String(e); }
+  }
+  window.results = results;
+  document.title = 'done';
+})();
+</script>