# `math.mat4.decompose`

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

Method of [`math.mat4`](math.mat4-value.md) · stable · since 2.0.0

```ts
decompose(m: Mat4): {
  position: Point3;
  quaternion: Quat;
  scale: Point3;
};
```

The pose of a matrix, with one rotation (a quaternion); a mirroring matrix puts its −1 on `scale.x`, and a sheared one decomposes approximately, as [`Pose.scale`](Pose.scale.md) says.

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `decompose` names no product |
| 2. A precedent | not recorded: no ledger row (coverage.json) names this member or its owner |
| 3. Two apps, or labs | not recorded: no ledger row names this member or its owner |
| 4. The cheaper fix first | not recorded per member (Appendix B decides it per need) |