Update README

README.md

@@ -10,42 +10,118 @@ A free and open-source 2D multimedia editor combining vector animation, audio pr
 
 ![Video Editing View](screenshots/video.png)
 
-## Current Features
+## Features
 
 **Vector Animation**
+- GPU-accelerated vector rendering with Vello
 - Draw and animate vector shapes with keyframe-based timeline
 - Non-destructive editing workflow
+- Paint bucket tool for automatic fill detection
 
 **Audio Production**
-- Multi-track audio recording
-- MIDI sequencing with synthesized and sampled instruments
-- Integrated DAW functionality
+- Real-time multi-track audio recording and playback
+- Node graph-based effects processing
+- MIDI sequencing with synthesizers and samplers
+- Comprehensive effects library (reverb, delay, EQ, compression, distortion, etc.)
+- Custom audio engine with lock-free design for glitch-free playback
 
 **Video Editing**
-- Basic video timeline and editing (early stage)
-- FFmpeg-based video decoding
+- Video timeline and editing with FFmpeg-based decoding
+- GPU-accelerated waveform rendering with mipmaps
+- Audio integration from video soundtracks
 
 ## Technical Stack
 
-- **Frontend:** Vanilla JavaScript
-- **Backend:** Rust (Tauri framework)
-- **Audio:** cpal + dasp for audio processing
-- **Video:** FFmpeg for encode/decode
+**Current Implementation (Rust UI)**
+- **UI Framework:** egui (immediate-mode GUI)
+- **GPU Rendering:** Vello + wgpu (Vulkan/Metal/DirectX 12)
+- **Audio Engine:** Custom real-time engine (`daw-backend`)
+  - cpal for cross-platform audio I/O
+  - symphonia for audio decoding
+  - dasp for node graph processing
+- **Video:** FFmpeg 8 for encode/decode
+- **Platform:** Cross-platform (Linux, macOS, Windows)
+
+**Legacy Implementation (Deprecated)**
+- Frontend: Vanilla JavaScript
+- Backend: Rust (Tauri framework)
 
 ## Project Status
 
-Lightningbeam is under active development. Current focus is on core functionality and architecture. Full project export is not yet fully implemented.
+Lightningbeam is under active development on the `rust-ui` branch. The project has been rewritten from a Tauri/JavaScript prototype to a pure Rust application to eliminate IPC bottlenecks and achieve better performance for real-time video and audio processing.
 
-### Known Architectural Challenge
+**Current Status:**
+- ✅ Core UI panes (Stage, Timeline, Asset Library, Info Panel, Toolbar)
+- ✅ Drawing tools (Select, Draw, Rectangle, Ellipse, Paint Bucket, Transform)
+- ✅ Undo/redo system
+- ✅ GPU-accelerated vector rendering
+- ✅ Audio engine with node graph processing
+- ✅ GPU waveform rendering with mipmaps
+- ✅ Video decoding integration
+- 🚧 Export system (in progress)
+- 🚧 Node editor UI (planned)
+- 🚧 Piano roll editor (planned)
 
-The current Tauri implementation hits IPC bandwidth limitations when streaming decoded video frames from Rust to JavaScript. Tauri's IPC layer has significant serialization overhead (~few MB/s), which is insufficient for real-time high-resolution video rendering.
+## Getting Started
 
-I'm currently exploring a full Rust rewrite using wgpu/egui to eliminate the IPC bottleneck and handle rendering entirely in native code.
+### Prerequisites
+
+- Rust (stable toolchain via [rustup](https://rustup.rs/))
+- System dependencies:
+  - **Linux:** ALSA development files, FFmpeg 8
+  - **macOS:** FFmpeg (via Homebrew)
+  - **Windows:** FFmpeg 8, Visual Studio with C++ tools
+
+See [docs/BUILDING.md](docs/BUILDING.md) for detailed setup instructions.
+
+### Building and Running
+
+```bash
+# Clone the repository
+git clone https://github.com/skykooler/lightningbeam.git
+# Or from Gitea
+git clone https://git.skyler.io/skyler/lightningbeam.git
+
+cd lightningbeam/lightningbeam-ui
+
+# Build and run
+cargo run
+
+# Or build optimized release version
+cargo build --release
+```
+
+### Documentation
+
+- **[CONTRIBUTING.md](CONTRIBUTING.md)** - Development setup and contribution guidelines
+- **[ARCHITECTURE.md](ARCHITECTURE.md)** - System architecture overview
+- **[docs/BUILDING.md](docs/BUILDING.md)** - Detailed build instructions and troubleshooting
+- **[docs/AUDIO_SYSTEM.md](docs/AUDIO_SYSTEM.md)** - Audio engine architecture and development
+- **[docs/UI_SYSTEM.md](docs/UI_SYSTEM.md)** - UI pane system and tool development
+- **[docs/RENDERING.md](docs/RENDERING.md)** - GPU rendering pipeline and shaders
 
 ## Project History
 
-Lightningbeam evolved from earlier multimedia editing projects I've worked on since 2010, including the FreeJam DAW. The current JavaScript/Tauri iteration began in November 2023.
+Lightningbeam evolved from earlier multimedia editing projects I've worked on since 2010, including the FreeJam DAW. The JavaScript/Tauri prototype began in November 2023, and the Rust UI rewrite started in late 2024 to eliminate performance bottlenecks and provide a more integrated native experience.
 
 ## Goals
 
-Create a comprehensive FOSS alternative for 2D-focused multimedia work, integrating animation, audio, and video editing in a unified workflow.
+Create a comprehensive FOSS alternative for 2D-focused multimedia work, integrating animation, audio, and video editing in a unified workflow. Lightningbeam aims to be:
+
+- **Fast:** GPU-accelerated rendering and real-time audio processing
+- **Flexible:** Node graph-based audio routing and modular synthesis
+- **Integrated:** Seamless workflow across animation, audio, and video
+- **Open:** Free and open-source, built on open standards
+
+## Contributing
+
+Contributions are welcome! Please see [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.
+
+## License
+
+[License information to be added]
+
+## Links
+
+- **GitHub:** https://github.com/skykooler/lightningbeam
+- **Gitea:** https://git.skyler.io/skyler/lightningbeam