- 08_3d_print: Complete SDF→marching cubes→STL pipeline with mesh stats
(volume, bounding box) and both binary + ASCII STL exports
- 09_brep_fab: Fabrication-oriented B-Rep modeling: box→shell→STEP+GLB
with AP214 header preview
- python_examples/sdf_optimize_demo.py: SDF parameter optimization
from point clouds with analytic gradient descent
- Update examples/CMakeLists.txt to include new subdirectories
- Add __pycache__/ to .gitignore