+++
date = "2024-08-28"
tags = ["vrm","three"]
title = "theatre.jsを使ってみる"
+++

three.jsをGUIで調整するためのlibです。reactのexampleがあるのでreactで書きます。

ちなみに、最近は色々なprojectがreactばかりになってきたのでreactを使っています。ただ、vueのほうがわかりやすいのでvueをおすすめしておきます。jsに近いほどよいですね。最初はjs+html+cssが一番ですけど。

```sh
$ nvm use 21

# https://www.theatrejs.com/docs/latest/getting-started/with-react-three-fiber
$ npx create-react-app theatre --template typescript
$ npm install --save react three @react-three/fiber @theatre/core @theatre/studio @theatre/r3f
$ npm install --save-dev @types/three
```

```json:package.json
{
  "name": "vite-react-typescript-starter",
  "private": true,
  "version": "0.0.0",
  "type": "module",
  "scripts": {
    "dev": "vite",
    "build": "tsc -b && vite build",
    "lint": "eslint .",
    "preview": "vite preview"
  },
  "dependencies": {
    "@theatre/core": "^0.6.1",
    "@theatre/r3f": "^0.7.2",
    "@theatre/studio": "^0.6.1",
    "react": "^18.3.1",
    "react-dom": "^18.3.1"
  },
  "devDependencies": {
    "@eslint/js": "^9.9.1",
    "@types/react": "^18.3.4",
    "@types/react-dom": "^18.3.0",
    "@vitejs/plugin-react": "^4.3.1",
    "eslint": "^9.9.1",
    "eslint-plugin-react-hooks": "^5.1.0-rc.0",
    "eslint-plugin-react-refresh": "^0.4.11",
    "globals": "^15.9.0",
    "typescript": "^5.5.3",
    "typescript-eslint": "^8.3.0",
    "vite": "^5.4.2"
  }
}
```

```ts:src/main.tsx
import './index.css'
import { createRoot } from 'react-dom/client'
import React, { useEffect } from 'react'
import { Canvas } from '@react-three/fiber'
import studio from '@theatre/studio'
import extension from '@theatre/r3f/dist/extension'
import { SheetProvider, editable as e, PerspectiveCamera } from '@theatre/r3f'
import { getProject } from '@theatre/core'
import demoProjectState from './state.json'

studio.initialize()
studio.extend(extension)

//const demoSheet = getProject('Demo Project', { state: demoProjectState }).sheet('Demo Sheet')
const demoSheet = getProject('Demo Project').sheet('Demo Sheet')
const App = () => {
  useEffect(() => {
    demoSheet.project.ready.then(() => demoSheet.sequence.play({ iterationCount: Infinity, range: [0, 1] }))
  }, [])

  return (
    <Canvas>
      <SheetProvider sheet={demoSheet}>
        <PerspectiveCamera theatreKey="Camera" makeDefault position={[0, 0, 0]} fov={75} />
        <ambientLight />
        <e.pointLight theatreKey="Light" position={[1, 1, 1]} />
        <e.mesh theatreKey="Cube">
          <boxGeometry args={[1, 1, 1]} />
          <meshStandardMaterial color="orange" />
        </e.mesh>
      </SheetProvider>
    </Canvas>
  )
}

createRoot(document.getElementById('root')!).render(<App />)
```

```sh
$ npm run dev
```

https://github.com/AndrewPrifer/CodropsCameraFlyThroughTutorial/