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Threlte Live - 3D VRM Avatar Streaming Platform

Current Project Structure

src/
  lib/
    animation/
      - AnimationController.svelte.ts    // ✅ Gesture and animation control
    audio/
      - tts.ts                          // ✅ Text-to-speech with phoneme timing
    components/
      - VRMAvatar.svelte               // ✅ VRM avatar rendering component
      - Chat.svelte                    // ✅ Interactive chat interface
      - SceneModel.svelte              // ✅ 3D scene model wrapper
      - Scene.svelte                   // ✅ Main 3D scene container
      - OrbitController.svelte         // ✅ Camera orbit controls
    llm/
      - generative.ts                  // ✅ Google Generative AI integration
    vrm/
      - loadVRMModel.ts               // ✅ VRM model loader utility
    types/                            // ✅ TypeScript type definitions
    utils/                            // ✅ Utility functions
    mixamo/                           // ✅ Mixamo animation support
  routes/
    - +page.svelte                    // ✅ Main application page
    - +layout.svelte                  // ✅ Application layout
    api/
      - chat/                         // ✅ Chat API endpoints
      - tts/                          // ✅ Text-to-speech API
      - generate/                     // ✅ AI generation endpoints
static/
  models/
    - fish.vrm, punk.vrm, char.vrm    // ✅ VRM avatar models
    - tommy-vercetti.vrm, mika.glb    // ✅ Additional character models
  animations/                         // ✅ Animation assets

Implementation Status

✅ Completed Features

Core 3D Infrastructure

  • Threlte/Three.js Integration: Full 3D rendering pipeline with Threlte
  • VRM Avatar System: Loading and rendering VRM models with @pixiv/three-vrm
  • Scene Management: Modular scene components with orbit controls
  • Animation Controller: Gesture and expression animation system

AI & Communication

  • Google Generative AI: LLM integration for conversational AI
  • Text-to-Speech: Advanced TTS with phoneme timing for lip-sync
  • Chat Interface: Real-time chat system with AI responses
  • Lip Sync Animation: Phoneme-based facial animation (wlipsync)

Technical Foundation

  • SvelteKit 5: Modern web framework with runes
  • TypeScript: Full type safety across the codebase
  • Tailwind CSS v4: Modern utility-first styling
  • Cloudflare Adapter: Deployment ready for edge computing

🚧 In Progress

Animation & Interaction

  • Mixamo Animation Integration: Enhanced character animations
  • Gesture Recognition: Hand and body gesture detection
  • Idle Animations: Automatic idle behaviors and micro-expressions
  • Emotion System: Facial expression mapping to conversation context

Streaming & Performance

  • OBS Integration: Transparent background for streaming overlay
  • Stream Optimization: 1080p/720p rendering optimization
  • Real-time Performance: 60fps target with efficient rendering

📋 Planned Features

Phase 1: Enhanced Streaming (Q1 2025)

  • YouTube Live Integration: Direct streaming API integration
  • Stream Controls: Start/stop streaming, scene switching
  • Overlay System: Chat overlay, donation alerts, viewer count
  • Multi-camera Setup: Different camera angles and scenes

Phase 2: Advanced AI (Q2 2025)

  • Voice Recognition: Real-time speech-to-text for live interaction
  • Personality System: Configurable AI personality traits
  • Memory System: Persistent conversation memory
  • Multi-language Support: International audience support

Phase 3: Interactive Features (Q3 2025)

  • Viewer Interaction: Chat commands, polls, mini-games
  • Virtual Environment: Interactive 3D backgrounds and props
  • Avatar Customization: Real-time avatar appearance changes
  • Social Features: Follower integration, social media connectivity

Phase 4: Platform Expansion (Q4 2025)

  • Multi-platform Streaming: Twitch, Discord, custom RTMP
  • Mobile Support: Responsive design for mobile viewers
  • API Ecosystem: Third-party integrations and plugins
  • Analytics Dashboard: Stream performance and audience insights

Technical Stack

Frontend

  • Framework: SvelteKit 5 with Svelte Runes
  • 3D Engine: Three.js via Threlte
  • Styling: Tailwind CSS v4
  • VRM Support: @pixiv/three-vrm v3.4.0

Backend & APIs

  • Runtime: Node.js with TypeScript
  • AI: Google Generative AI
  • TTS: Custom phoneme-timing implementation
  • Blockchain: Solana Web3.js

Deployment

  • Platform: Cloudflare Pages/Workers
  • CDN: Cloudflare global network
  • Edge Computing: Serverless functions

Performance Targets

  • Rendering: 60fps at 1080p resolution
  • Latency: <100ms AI response time
  • Loading: <3s initial model load
  • Memory: <500MB browser memory usage
  • Streaming: 1080p@30fps or 720p@60fps output

Development Priorities

  1. Streaming Optimization: OBS integration and performance tuning
  2. Animation Enhancement: Mixamo integration and gesture system
  3. AI Personality: Enhanced conversational capabilities
  4. Live Interaction: Real-time viewer engagement features
  5. Platform Integration: YouTube Live API and multi-platform support

Getting Started

# Install dependencies
pnpm install

# Start development server
pnpm dev

# Build for production
pnpm build

The project is currently in active development with a focus on creating a production-ready 3D VRM avatar streaming platform for YouTube Live and other streaming services.