# Bridge

> Plank deck spanning a gap, optionally arched, with railings and slab colliders that follow the deck.

## Add it

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

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

## Use it

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

<Bridge position={[0, 0, 0]} seed={1} />
```

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

```json
{ "type": "Bridge", "props": { "position": [0, 0, 0], "seed": 1 } }
```

## 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. |
| `length` | `number` | `6` | Span along local X, in units. |
| `width` | `number` | `2` | Walkway width along local Z, in units. |
| `arch` | `number` | `0` | Arch rise at the center, in units (0 = flat). |
| `rails` | `boolean` | `true` | Side railings. |
| `color` | `color` | palette `wood` | Deck color; defaults to the world palette's `wood` slot. |
| `seed` | `number` | `1` | Seed for the deterministic variation: same seed, same result. |

## Registry manifest

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

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