# Wall

> Wall segment with door/window openings and a fixed collider.

## Add it

```bash
npx @runek/cli add wall
```

Pulls `@react-three/rapier@^2.2.0`, `@runek/core@^0.15.0`.

## Use it

```tsx
import { Wall } from './runek/Wall'

<Wall position={[0, 0, 0]} />
```

Or as a node in a world file ([worlds as data](https://runek.nullorder.org/docs/worlds-as-data.md)):

```json
{ "type": "Wall", "props": { "position": [0, 0, 0] } }
```

## Props

| Prop | Type | Default | Description |
|---|---|---|---|
| `position` | `[x, y, z]` | `[0, 0, 0]` | Position [x, y, z] in units (1 unit = 1 m, Y-up). |
| `rotation` | `[x, y, z]` | `[0, 0, 0]` | Euler rotation [x, y, z] in radians. |
| `seed` | `number` |  | Accepted for the component contract; this component has no seeded variation yet. |
| `width` | `number` | `4` | Length along the wall's local X axis, in units. |
| `height` | `number` | `3` | Height, in units. |
| `thickness` | `number` | `0.2` | Thickness, in units. |
| `color` | `color` | palette `wall` | Defaults to the world palette's `wall` slot. |
| `openings` | `WallOpening[]` |  | Holes cut into the wall (doors, windows). Must not overlap horizontally. |

### `WallOpening`

| Prop | Type | Default | Description |
|---|---|---|---|
| `offset` | `number` |  | Horizontal center offset from the wall center, in units. |
| `width` | `number` | **required** |  |
| `height` | `number` | **required** |  |
| `sill` | `number` |  | Height of the opening's base above the wall base, in units. |

## Migrate

**v0.11.0 → v0.12.0.** The single `opening` prop became `openings`, an array, so one wall can carry a door and windows together. The `WallOpening` shape itself is unchanged (`offset`, `width`, `height`, `sill`).

**v0.11.0**

```tsx
<Wall
  width={9}
  opening={{ width: 1, height: 2.1 }}
/>
```

**v0.12.0**

```tsx
<Wall
  width={9}
  openings={[
    { width: 1, height: 2.1 },
    { offset: 3, width: 1.3, height: 1.2, sill: 1 },
  ]}
/>
```

- Mechanical migration: wrap the object in an array — `opening={X}` becomes `openings={[X]}`; in world files, `"opening": {…}` becomes `"openings": [{…}]`.
- Openings are laid out by `offset` (center offset from the wall center, in units) and must not overlap horizontally.

## Registry manifest

[https://runek.nullorder.org/r/components/wall.json](https://runek.nullorder.org/r/components/wall.json): Self-contained JSON: inlined source plus resolved dependencies, exactly what `runek add wall` fetches.

Browse the whole catalog in the **[gallery →](https://runek.nullorder.org/gallery)**.