# 3D Geometry Implementation List
## High Priority
### Core Geometry Types
- [x] 3D Bezier curve (bezier_curve3d): Currently only 2D version exists
- [x] 3D NURBS curve (nurbs_curve3d): Currently only 2D version exists
- [x] Line segment (line_segment): Finite length line segment implementation
- [x] Triangle mesh: Surface representation composed of triangles
- [x] Polygon face: Arbitrary polygon face implementation
- [x] Cube: Basic cube implementation
- [x] Boolean operations: Union, intersection, difference operations between solids
- [x] Advanced intersection detection: Curve-surface, surface-surface intersections
- [x] Collision detection: Collision detection between solids
- [x] Distance calculation: Distance from point to surface, surface to surface
### Topological Operations
- [x] Topological operations: Topological modifications of solids (e.g., edge splitting, face merging)
- [x] Complete BREP implementation: More comprehensive boundary representation
- [x] Solid decomposition: Breaking down complex solids into simpler parts
- [x] Geometric validation: Checking validity of geometric models (e.g., manifoldness, self-intersections)
## Medium Priority
### Additional Geometry Types
- [x] Polyline: Continuous curve composed of multiple line segments
- [x] B-spline curve: Spline type other than Bezier and NURBS
- [x] Catmull-Rom spline: Interpolating spline curve
- [x] Prism: Polygonal prism
- [x] Pyramid: Polygonal pyramid
- [x] Polyhedron: Solid composed of multiple polygonal faces
- [x] CSG representation: Constructive Solid Geometry representation
### Point Cloud Processing
- [x] Point cloud processing: Loading, saving, filtering, sampling operations for point clouds
- [x] Point clustering: Distance or density-based point clustering algorithms
- [x] Point set topology analysis: Analysis of connection relationships between points
### Surface Operations
- [x] Mesh subdivision algorithms: More subdivision methods (e.g., Loop subdivision, Catmull-Clark subdivision)
- [x] Surface reconstruction: Reconstructing surfaces from point clouds or other data
- [x] Surface clipping: Clipping operations on surfaces
- [x] UV parameterization: UV coordinate mapping for surfaces
### Advanced Operations
- [x] Geometric constraint solving: Generating geometric shapes that satisfy specific constraints
- [x] Parametric modeling: Parameter-based model generation and modification
- [x] Mesh optimization: Improving mesh quality
- [x] Geometric data exchange: Supporting import/export of more file formats
## Low Priority
### Specialized Geometry
- [x] Implicit surfaces: Surfaces defined by mathematical equations
- [x] Fractal geometry: Generation and representation of fractal shapes
# Advanced Features & Further Improvements
## High Priority
- [x] Core Topology Tools: Complete implementation of IndexedMapOfShape, ListOfShape, SequenceOfShape
- [x] Robust Boolean Operations: Enhance BSP tree algorithm for complex boundaries and collisions
- [x] Advanced Validation System: Add TopoDS_Validator with detailed error reporting
- [x] Topological Naming & History: Support shape modification history tracking and naming consistency
- [x] Parametric Modeling Support: Parametric models with dynamic updates
- [x] Advanced Mesh Generation: High-quality mesh generation for all shape types
- [x] Multi-Threaded Operations: Parallel processing for complex models
- [x] Standards Compliance: Comprehensive STEP/IGES standard support
## Medium Priority
- [x] Advanced Fillet/Chamfer: Support edge selection, radius control, G1/G2 continuity
- [x] Advanced Offset Operations: Support variable thickness and shell operations
- [x] WebAssembly Optimization: Browser optimization and bindings
- [x] Advanced Shape Repair Tools: Automatic topology repair
- [x] Plugin System: Support for third-party plugin extensions
- [x] Constraint Solving: Geometric constraint solving
- [x] Multi-Resolution Modeling: Multi-resolution modeling and LOD
- [x] Benchmarking: Performance benchmarking and optimization
- [x] Comprehensive Documentation: Complete API documentation and examples
- [x] Test Coverage: Enhanced test coverage
## Low Priority
- [x] GPU-Accelerated Operations: GPU acceleration for BSP tree and mesh operations
- [x] Cloud-Native Features: CRDT collaborative editing and cloud storage
- [x] Machine Learning Integration: ML feature recognition and optimization
- [x] Real-time Collaborative Editing: Real-time collaborative editing
- [x] AI Integration: Geometric feature recognition and model repair
- [x] Adaptive LOD System: Distance/complexity adaptive LOD
- [x] Surface Fitting & Analysis: Point cloud fitting and surface analysis
- [x] Advanced Intersection Algorithms: Curve/surface adaptive subdivision and numerical stability
- [x] Advanced Visualization: GPU-driven rendering, real-time global illumination
- [x] Modern File Format Support: Full support for glTF/USD/3MF and other new formats
- [x] Neural Rendering: AI-driven rendering
- [x] Virtual Texture System: Virtual textures for large datasets
- [x] Mesh Quality Repair: Automatic detection and repair
- [x] Post-processing Toolchain: Post-processing toolchain
- [x] Simulation Ecosystem Integration: Integration with simulation systems
- [x] Incremental Compilation / Hot Reload: Hot reload and incremental compilation