npm package: @playcanvas/supersplat-viewer
Description: Viewer for https://superspl.at
Author: PlayCanvas
Latest version: 1.19.1

# SuperSplat Viewer

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| [User Manual](https://developer.playcanvas.com/user-manual/gaussian-splatting/editing/supersplat/import-export/#html-viewer-htmlzip) | [Blog](https://blog.playcanvas.com) | [Forum](https://forum.playcanvas.com) |

This is the official viewer for [SuperSplat](https://superspl.at).

<img width="1114" height="739" alt="supersplat-viewer" src="https://github.com/user-attachments/assets/15d2c654-9484-4265-a279-99acb65e38c9" />

The web app compiles to a simple, self-contained static website.

The app supports a few useful URL parameters (though please note these are subject to change):

| Parameter | Description | Default |
| --------- | ----------- | ------- |
| `settings` | URL of the `settings.json` file | `./settings.json` |
| `content` | URL of the scene file (`.ply`, `.sog`, `.meta.json`, `.lod-meta.json`) | `./scene.compressed.ply` |
| `skybox` | URL of an equirectangular skybox image | |
| `poster` | URL of an image to show while loading | |
| `noui` | Hide UI | |
| `noanim` | Start with animation paused | |
| `ministats` | Show runtime CPU/GPU performance graphs | |
| `unified` | Force unified rendering mode | |
| `aa` | Enable antialiasing (not supported in unified mode) | |

The web app source files are available as strings for templating when you import the package from npm:

```ts
import { html, css, js } from '@playcanvas/supersplat-viewer';

// logs the source of index.html
console.log(html);

// logs the source of index.css
console.log(css);

// logs the source of index.js
console.log(js);
```

## Local Development

To initialize a local development environment for SuperSplat Viewer, ensure you have [Node.js](https://nodejs.org/) 18 or later installed. Follow these steps:

1. Clone the repository:

   ```sh
   git clone https://github.com/playcanvas/supersplat-viewer.git
   cd supersplat-viewer
   ```

2. Install dependencies:

   ```sh
   npm install
   ```

3. Start the development build and local web server:

   ```sh
   npm run develop
   ```

4. Open your browser at http://localhost:3000.

## Settings Schema

The `settings.json` file has the following schema (defined in TypeScript and taken from the SuperSplat editor):


```typescript
type AnimTrack = {
    name: string,
    duration: number,
    frameRate: number,
    target: 'camera',
    loopMode: 'none' | 'repeat' | 'pingpong',
    interpolation: 'step' | 'spline',
    smoothness: number,
    keyframes: {
        times: number[],
        values: {
            position: number[],
            target: number[],
        }
    }
};

type ExperienceSettings = {
    camera: {
        fov?: number,
        position?: number[],
        target?: number[],
        startAnim: 'none' | 'orbit' | 'animTrack',
        animTrack: string
    },
    background: {
        color?: number[]
    },
    animTracks: AnimTrack[]
};
```

### Example settings.json

```json
{
  "background": {"color": [0,0,0,0]},
  "camera": {
    "fov": 1.0,
    "position": [0,1,-1],
    "target": [0,0,0],
    "startAnim": "orbit"
  },
  "animTracks": []
}
```