Strip core to render data and render graphs

Move glTF, picking, camera controls, and conventional handles into addons. Keep camera and material mutations in SIMD-aligned shared SOA rows and synchronize material updates directly into GPU buffers.

Amp-Thread-ID: https://ampcode.com/threads/T-01a01380-b478-77d0-84a0-102880a5c5ae
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

tests/gltf-import.test.js

@@ -2,7 +2,9 @@ import test from "node:test";
 import assert from "node:assert/strict";
 
 import { GltfImporter } from "@yawn/gltf-import";
+import { gltfToRenderDataPacket } from "../addons/gltf-import/src/gltf.js";
 import { writeSharedUpload } from "../addons/gltf-import/src/shared-upload.js";
+import { createCubeGeometry, encodeGeometryGlb } from "../examples/render-graph-studio/demo-loadouts.js";
 
 class WorkerMock extends EventTarget {
   messages = [];
@@ -18,7 +20,7 @@ test("glTF addon stages fetched bytes in shared SOA and commits only metadata",
   const memory = new SharedArrayBuffer(4096);
   const descriptor = {
     id: 9,
-    name: "upload.gltf",
+    name: "upload.renderData",
     domain: "fixed",
     scalar: "u32",
     lanes: 4,
@@ -36,8 +38,8 @@ test("glTF addon stages fetched bytes in shared SOA and commits only metadata",
   const calls = [];
   const core = {
     async allocateArray(layout) { calls.push(["allocate", layout]); return array; },
-    async commitGlbUpload(value, byteLength, options) {
-      calls.push(["commit", value, byteLength, options]);
+    async commitRenderDataUpload(value, byteLength) {
+      calls.push(["commit", value, byteLength]);
       return { meshes: [] };
     },
   };
@@ -54,7 +56,7 @@ test("glTF addon stages fetched bytes in shared SOA and commits only metadata",
   worker.reply({ type: "allocate", request: 1, byteLength: 20 });
   await tick();
   assert.deepEqual(calls[0], ["allocate", {
-    name: "upload.gltf", domain: "fixed", scalar: "u32", lanes: 4, stride: 16, length: 2,
+    name: "upload.renderData", domain: "fixed", scalar: "u32", lanes: 4, stride: 16, length: 2,
   }]);
   assert.equal(worker.messages[1].buffer, memory);
   assert.equal(worker.messages[1].descriptor, descriptor);
@@ -65,7 +67,25 @@ test("glTF addon stages fetched bytes in shared SOA and commits only metadata",
   worker.reply({ type: "ready", request: 1, byteLength: bytes.byteLength });
   assert.deepEqual(await loading, { meshes: [] });
   assert.deepEqual(new Uint8Array(memory, 64, 20), bytes);
-  assert.deepEqual(calls[1], ["commit", array, 20, { framing: "interior" }]);
+  assert.deepEqual(calls[1], ["commit", array, 20]);
   importer.dispose();
   assert.equal(worker.terminated, true);
 });
+
+test("glTF parsing produces a format-neutral typed render-data packet in the addon", async () => {
+  const glb = encodeGeometryGlb(createCubeGeometry());
+  const packet = await gltfToRenderDataPacket(
+    new Uint8Array(glb),
+    "https://example.test/scene.glb",
+  );
+  const header = new DataView(packet.buffer, packet.byteOffset, packet.byteLength);
+  assert.equal(header.getUint32(0, true), 0x50445259);
+  assert.equal(header.getUint32(4, true), 1);
+  const metadataLength = header.getUint32(8, true);
+  const payloadLength = header.getUint32(12, true);
+  const metadata = JSON.parse(new TextDecoder().decode(packet.subarray(16, 16 + metadataLength)));
+  assert.equal(metadata.geometries.length, 1);
+  assert.equal(metadata.occurrences.length, 9);
+  assert.deepEqual(metadata.geometries[0].instanceType.slice(0, 2), [5, 0]);
+  assert.equal(((16 + metadataLength + 3) & ~3) + payloadLength, packet.byteLength);
+});