# Coin

> Bijou pack: a thick metal coin with a reeded edge, a glass lens on each face and a boss through the middle, standing on its edge. It turns slowly like a drum, carrying its beads up the side until they spill back over the boss. A tap tosses it up end over end, beads flying, and it lands back on its edge. Raymarched in WebGL, with real bead physics.

- Slug: `bijou-coin`
- Category: [Asset packs](https://www.assembli.design/category/asset-packs.md)
- Subcategory: [Bijou](https://www.assembli.design/category/asset-packs/bijou.md) (`bijou`)
- Type: component
- Tags: 3d, webgl, raymarching, physics, glass, metal, beads, coin, token, drum, toss, flip
- npm dependencies: none
- shadcn/ui dependencies: none
- Live preview: https://www.assembli.design/preview/bijou-coin
- Page: https://www.assembli.design/components/bijou-coin

![Coin preview](https://www.assembli.design/thumbnails/bijou-coin-light.png)

## Props

Other props pass through to the root element.

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `palette` | `BijouPalette` |  | A preset palette. Every piece in the pack reads the same colors. |
| `colors` | `Partial<BijouColors>` |  | Override any color of the palette, as any CSS color. |
| `studio` | `string` |  | The studio the piece floats in, as any CSS color: what the metal and glass reflect. By default it's a pale warm grey, or near black on dark surfaces. |
| `finish` | `BijouFinish` |  | How the metal is finished. Changing it crossfades. |
| `speed` | `number` |  | Idle motion speed. 0 holds still, though the beads still settle; reduced motion always holds. |
| `interactive` | `boolean` |  | Lean toward the cursor, drag to turn and fling, tap for the piece's trick. The beads feel all of it. |
| `poke` | `number` |  | Change this value to play the piece's tap trick on cue. |
| `shadow` | `boolean` |  | The soft shadow the piece casts on the floor beneath it. |
| `surface` | `"auto" \| "light" \| "dark"` |  | What the piece sits on. "auto" follows the page theme; set "light" or "dark" when it sits on its own backdrop. |
| `rotate` | `Vec3` |  | Extra rotation of the resting pose in degrees: [pitch, yaw, roll]. |

## Install

One-time setup (needs a subscription):

1. Add the registry to the project's `components.json`: `{"@assembli":{"url":"https://www.assembli.design/r/{name}.json","headers":{"Authorization":"Bearer ${ASSEMBLI_API_KEY}"}}}` (merge into `"registries"`).
2. Put an API key from https://www.assembli.design/account in `.env.local` as `ASSEMBLI_API_KEY=asm_…`.

Then install with the shadcn CLI (writes `components/bijou-coin/bijou-coin.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/bijou-coin
```

Registry item JSON: https://www.assembli.design/r/bijou-coin.json (send `Authorization: Bearer <api key>`)

## Code

> Component source needs an Assembli subscription ($12/month or $96/year) and an API key sent as `Authorization: Bearer <key>`. To get one without copying anything, POST https://www.assembli.design/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://www.assembli.design/api/agent/token for the key. Or subscribe at https://www.assembli.design/pricing and create a key at https://www.assembli.design/account.