GitLab

Features:
- Gerber RS-274X parser with multi-layer support
- Excellon drill file support
- Bitmap image input (PNG/JPG/BMP)
- 600 DPI default rasterization
- Solid watertight mesh generation
- Unit conversion (inch/mm)
- Mesh simplification
- Binary/ASCII STL export

Bitmap mode:
- Threshold-based conversion (default 50%)
- Convert any image to 3D model
- Emboss height configurable

Technical:
- Pure C99 implementation
- stb_image for bitmap loading
- Complete perimeter wall generation
- Top/bottom face + side walls