# `Labs.geometry`

> Contract 2.0.0 · package sha256 `a857eca95b35921109faf997094bb4192f12527d9d0fcd4be7e97f06425bad6e` · generated from `configurator-runtime.d.ts` by `services/onsite-scripter/scripts/build-contract-docs.mjs`; edit the source, not this file.

Property of [`Labs`](Labs.md) · labs · since 2.0.0 · called as `session.labs.geometry`

```ts
readonly geometry: {
  read(query: Query, attributes: readonly GeometryAttribute[], options?: {
    from?: 'authored' | 'current';
    signal?: AbortSignal;
  }): Promise<GeometryData<C>[]>;
  write(query: Query, data: GeometryWrite | null, options?: C & SignalOption): Promise<Report>;
};
```

Read and write vertex data of loaded and created meshes.

## Members

| Member | Summary |
| --- | --- |
| [`read`](Labs.geometry.read.md) | Engine query (not an asset load, so it is allowed inside [`beforeCommit`](Session.beforeCommit.md); cache its result by [`describe(node).asset.version`](AssetInfo.version.md), or by `asset.url` when the version is null (unstamped)). |
| [`write`](Labs.geometry.write.md) | Copy-on-write per part, local space. |

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `geometry` names no product |
| 2. A precedent | pass: [Unity Mesh.vertices](https://docs.unity3d.com/ScriptReference/Mesh-vertices.html) (row `G9`); [Unity Mesh.GetIndices](https://docs.unity3d.com/ScriptReference/Mesh.GetIndices.html) (row `G9`); [Unity Mesh.SetVertices](https://docs.unity3d.com/ScriptReference/Mesh.SetVertices.html) (row `K54`) |
| 3. Two apps, or labs | labs: it graduates when a second app uses it; apps today: app-b362a81c85, app-bcb7ef21da, app-f9a32142f1 |
| 4. The cheaper fix first | decided per need in Appendix B: rows `G9`, `K54` at tier asset, labs (a member only where no rule, data, asset or app code serves the need) |