Ampandheaust
0e6d7e367c
Add shared-data and bundle invalidation signals, and have handles publish them automatically for SAB and graph mutations. Document the raw core worker protocol in a dedicated VitePress site and simplify the glTF import and picking example. Amp-Thread-ID: https://ampcode.com/threads/T-01a01ff8-b91f-724f-8952-f07c6b5042fd Co-authored-by: Heaust Azure <heaust.azure@gmail.com>
1.5 KiB
glTF import and picking
Import off-thread
The shared importer worker fetches and parses glTF/GLB, then the response hydrates Mesh and PBRMaterial handles attached to your scene.
import { importGltf } from "@yawn/handles";
const meshes = await importGltf(scene, "/models/sponza.glb");
meshes[0].position[1] = 0.5;
The importer handles triangle primitives, external/data buffers, standard vertex attributes, indices, node transforms, and metallic-roughness values. Application-specific extensions remain application policy.
Pick in the BVH worker
const picking = new Picking(scene);
await picking.ready;
canvas.addEventListener("click", async () => {
const hits = await picking.pick([0, 0, 4], [0, 0, -1]);
const nearest = hits[0];
if (nearest) console.log(nearest.id, nearest.distance);
});
The worker reads shared node positions and mesh bounds, updates its BVH when the shared frame counter changes, and returns all AABB hits sorted by distance. You can shortlist or run an exact test afterward.
If row allocations relocated since Picking was created, refresh its shared descriptors:
await picking.refresh();
The playground below imports the repository's full LFS-backed sponza.glb in the importer worker, preserves its authored transforms, places an arc camera in its coordinate system, and sends a real ray to the BVH worker. Click the preview to pick again.