Franz Dietrich 00b9007f00 Implement tessellation for turtle graphics with fill support
- Added tessellation module to handle path tessellation using Lyon.
- Updated execution logic to record fill vertices and manage fill contours.
- Integrated tessellation into command execution for lines, arcs, and filled shapes.
- Enhanced TurtleState to track fill state and contours.
- Modified TweenController to handle fill commands and update drawing commands accordingly.
- Improved debug output for fill operations and tessellation processes.
2025-10-12 12:34:20 +02:00

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# turtle-lib-macroquad
The main turtle graphics library built on Macroquad with Lyon tessellation.
**See the [main README](../README.md) for complete documentation.**
## Features
**Complete Lyon Integration** - All drawing operations use GPU-optimized tessellation
- Unified rendering pipeline for lines, arcs, circles, and fills
- ~410 lines of code eliminated through architectural simplification
- Consistent high-quality rendering across all primitives
**Multi-Contour Fill System** - Advanced fill capabilities with automatic hole detection
- EvenOdd fill rule for complex shapes with holes (like cheese or yin-yang symbols)
- `pen_up()` closes current contour, `pen_down()` opens next contour
- Progressive fill preview during animations
- Support for self-intersecting paths
**Smooth Animation** - Tweening system with live rendering
- Configurable speed control
- Frame-rate independent animation
- Live fill preview during circle/arc drawing
## Quick Examples
```bash
# Run from this directory
cargo run --example square # Basic square drawing
cargo run --example yinyang # Multi-contour fills with holes
cargo run --example fill_advanced # Self-intersecting fills
cargo run --example koch # Recursive fractals
cargo run --example fill_demo # Multiple independent fills
```
## Architecture Highlights
### Rendering Pipeline
All drawing operations → Lyon tessellation → GPU mesh rendering
### DrawCommand Enum
Simplified from 5 variants to 1:
- `Mesh(MeshData)` - unified variant for all drawing operations
### Fill System
- `FillState` tracks multiple contours (completed + current)
- Pen state management automatically handles contour creation
- EvenOdd tessellation provides automatic hole detection
See [LYON_COMPLETE.md](LYON_COMPLETE.md) and [MULTI_CONTOUR_FILLS.md](MULTI_CONTOUR_FILLS.md) for implementation details.
## Status
**Stable** - Lyon integration complete, multi-contour fills working, all examples passing.
See [../README.md](../README.md) for full API documentation and project status.