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refactor: make instance type metadata opaque

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Amp-Thread-ID: https://ampcode.com/threads/T-019f9d91-77c1-7206-a60f-ed6554ce92ab

Co-authored-by: Heaust Azure <heaust.azure@gmail.com>
This commit is contained in:
Amp
2026-07-29 06:13:25 +00:00
co-authored by heaust
parent 092b319d75
commit 0e866596c0
11 changed files with 110 additions and 166 deletions
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tests/snapshot-bvh.test.js
+8 -7
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@@ -79,26 +79,26 @@ test("snapshot reader refreshes memory after pinning", () => {
}
});
function bvhSnapshot({ pickable = [1, 1], shifted = false } = {}) {
function bvhSnapshot({ metadata = [0, 0x80000000], shifted = false } = {}) {
const count = 2;
return { instanceCount: count, streams: {
instanceSlot: Uint32Array.from([5, 6]), instanceGeneration: Uint32Array.from([1, 1]),
instanceMeshSlot: Uint32Array.from([2, 2]), instanceMeshGeneration: Uint32Array.from([4, 4]),
instanceType: Uint32Array.from(pickable.flatMap(x => [x, ...Array(15).fill(0)])),
instanceType: Uint32Array.from(metadata.flatMap(x => [x, ...Array(15).fill(0)])),
instanceWorldMin: Float32Array.from(shifted ? [10, -1, -1, 4, -1, -1] : [2, -1, -1, 4, -1, -1]),
instanceWorldMax: Float32Array.from(shifted ? [12, 1, 1, 6, 1, 1] : [3, 1, 1, 6, 1, 1]),
}};
}
test("BVH preserves topology for visibility/refit and reports world distances", () => {
test("BVH ignores opaque instance metadata during refit and picking", () => {
const bvh = new DerivedBvh();
bvh.update(bvhSnapshot());
assert.equal(bvh.rebuilds, 1);
assert.equal(bvh.pick([0, 0, 0], [2, 0, 0], Infinity, 2)[0].distance, 2);
bvh.update(bvhSnapshot({ pickable: [0, 1], shifted: true }));
bvh.update(bvhSnapshot({ metadata: [0xffffffff, 0], shifted: true }));
assert.equal(bvh.rebuilds, 1);
assert.equal(bvh.refits, 1);
assert.deepEqual(bvh.pick([0, 0, 0], [1, 0, 0], Infinity, 2).map(hit => hit.slot), [6]);
assert.deepEqual(bvh.pick([0, 0, 0], [1, 0, 0], Infinity, 2).map(hit => hit.slot), [6, 5]);
});
class WorkerMock extends EventTarget {
@@ -108,7 +108,7 @@ class WorkerMock extends EventTarget {
reply(data) { this.dispatchEvent(new MessageEvent("message", { data })); }
}
test("renderer pick returns gated instances and exact epoch", async () => {
test("renderer pick returns instance metadata handles and exact epoch", async () => {
const scene = snapshotFixture();
const ring = 8192;
const ringHeader = new Int32Array(scene.memory.buffer, ring, 16);
@@ -124,7 +124,8 @@ test("renderer pick returns gated instances and exact epoch", async () => {
const result = await picking;
assert.equal(result.epoch, 1);
assert.equal(result.hits[0].distance, 2);
assert.equal(typeof result.hits[0].instance.setVisible, "function");
assert.equal(typeof result.hits[0].instance.setType, "function");
assert.equal(result.hits[0].instance.setVisible, undefined);
client.dispose();
assert.equal(bvhWorker.terminated, true);
});