0.2.0

3D Marquee

A React library featuring a 3D rotating orb with a scrolling LED marquee effect. The word scrolls horizontally across the center band of the sphere, creating a seamless ticker display.

Installation

Install the package:

npm install 3d-marquee

Note: With npm 7+ and yarn, peer dependencies are automatically installed. If you're using npm 6 or earlier, you'll need to install the peer dependencies manually:

npm install 3d-marquee react react-dom three @react-three/fiber @react-three/drei @react-three/postprocessing

Peer Dependencies

The following peer dependencies are required and will be automatically installed with npm 7+:

• react: ^18.0.0 || ^19.0.0
• react-dom: ^18.0.0 || ^19.0.0
• three: >=0.158.0
• @react-three/fiber: ^8.15.11 || ^9.0.0
• @react-three/drei: ^9.92.7 || ^10.0.0
• @react-three/postprocessing: ^2.15.9 || ^3.0.0

Usage

Import and use the LedMarqueeOrbContainer component:

import { LedMarqueeOrbContainer } from '3d-marquee'

function App() {
  return (
    <div style={{ width: '100vw', height: '100vh' }}>
      <LedMarqueeOrbContainer
        word="Hello World"
        speed={0.1}
        dimColor="red"
        brightColor="blue"
      />
    </div>
  )
}

Vite Configuration

If you're using Vite, add this to your vite.config.ts to ensure React is properly deduplicated:

import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [react()],
  resolve: {
    dedupe: ['react', 'react-dom'],
  },
  optimizeDeps: {
    include: ['react', 'react-dom', '@react-three/fiber', '@react-three/drei', '@react-three/postprocessing'],
  },
})

Component API

LedMarqueeOrbContainer

The main component that includes the Canvas, lighting, controls, and post-processing effects.

Props:

• word (string, required): The text to display on the marquee
• speed (number, required): Scroll speed multiplier (higher = faster)
• dimColor (string, required): Color for inactive LEDs (e.g., "#1a261a" or "red")
• brightColor (string, required): Color for active LEDs (e.g., "#00ff4d" or "blue")
• radius (number, optional, default: 1): Sphere radius
• ledSpacing (number, optional, default: 0.0075): Spacing between LED dots
• columnSpacing (number, optional, default: 0.005): Spacing between columns

LedMarqueeOrb

The core orb component (used internally by LedMarqueeOrbContainer). You can use this directly if you need more control over the Canvas setup.

Props:

Same as LedMarqueeOrbContainer, but all props are optional with defaults.

Features

• 3D Rotating Orb: Smoothly rotating sphere with orbit controls
• LED Marquee Effect: Text scrolls horizontally across the center band
• Shader-Based Rendering: High-performance GPU-accelerated LED matrix effect
• Bloom Post-Processing: Glowing LED effect with bloom shader
• Customizable Colors: Set dim and bright LED colors via props
• Responsive Design: Full viewport canvas that adapts to screen size

Controls

• Mouse Drag: Rotate the camera around the orb
• Scroll: Zoom in/out

Development

Building the Library

To build the library for distribution:

npm run build:lib

This creates the distribution files in the dist/ directory.

Running the Demo

To run the demo/example application:

npm run dev

The application will be available at http://localhost:5173 (or the port shown in the terminal).

Building for Production

Build the production bundle:

npm run build

Preview the production build:

npm run preview

Technologies

• React 18/19: UI framework
• Vite: Build tool and dev server
• TypeScript: Type safety
• Three.js: 3D graphics library
• @react-three/fiber: React renderer for Three.js
• @react-three/drei: Useful helpers and abstractions
• @react-three/postprocessing: Post-processing effects (bloom)

Implementation Details

The LED marquee effect is implemented using a custom shader material that:

1. Samples a canvas texture containing the repeated word
2. Constrains rendering to a horizontal band around the sphere's equator
3. Quantizes UV coordinates into a grid for the LED dot matrix effect
4. Applies scrolling offset for the marquee animation
5. Uses emissive colors and bloom post-processing for the glow effect

License

MIT