# `GeometryData.joints`

> 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 [`GeometryData`](GeometryData.md) · labs, `@experimental` · since 2.0.0

```ts
readonly joints?: Uint16Array;
```

Four joint indices per vertex (skinned meshes).

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `joints` names no product |
| 2. A precedent | pass (through its owner [`GeometryData`](GeometryData.md)): [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`) |
| 3. Two apps, or labs | labs (`@experimental` at a stable path, reached through `has()` or `supports()`): it graduates when a second app uses it; apps today: app-bcb7ef21da, app-f9a32142f1 |
| 4. The cheaper fix first | decided per need in Appendix B: rows `G9` (through its owner [`GeometryData`](GeometryData.md)) at tier labs (a member only where no rule, data, asset or app code serves the need) |