# Glass Resize Arrow

> Lumen pack asset: a diagonal resize arrow in frosted, halftone-printed glass. Its shaft stretches out on a springy ease, holds, then pulls back in, as if a corner were being dragged. Raymarched in WebGL with refraction and bevel highlights. Five tints or your own colors. Zero dependencies; any number share one WebGL context.

- Slug: `lumen-resize`
- Category: [Asset packs](https://www.assembli.design/category/asset-packs.md)
- Subcategory: [Lumen](https://www.assembli.design/category/asset-packs/lumen.md) (`lumen`)
- Type: component
- Tags: 3d, webgl, raymarching, asset, glass, icon, arrow, resize, expand, scale
- npm dependencies: none
- shadcn/ui dependencies: none
- Added: 2026-10-21
- Live preview: https://www.assembli.design/preview/lumen-resize
- Page: https://www.assembli.design/components/lumen-resize

## 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/lumen-resize/lumen-resize.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/lumen-resize
```

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

## Code

> Component source needs an Assembli subscription ($12/month) 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.