什么软件能将三维面变成三维体提取物体的边界线

### 3D Surface to Solid Conversion Software with Boundary Extraction Tools For converting a three-dimensional surface model into a solid one while extracting the boundaries of objects, several pieces of specialized software can be utilized effectively. One approach involves using Computer-Aided Design (CAD) programs that offer robust geometry handling capabilities. These applications often provide comprehensive functionalities not only for transforming surfaces into solids but also for accurately identifying and isolating object edges or contours[^3]. Another solution lies within computational graphics research software which may include advanced algorithms designed specifically for such tasks as mesh processing and boundary detection on complex geometries[^1]. Additionally, certain libraries developed primarily for computer graphics purposes might contain useful functions related to this requirement. For instance, some packages support operations like constructing watertight volumes from open meshes along with tools for analyzing topological features including borders between different regions of an object[^2]. To demonstrate how these processes work programmatically: ```python import trimesh # A Python library for loading and using triangular meshes. from trimesh import creation, boolean # Load your input STL file representing just the outer shell/surface. mesh_surface = trimesh.load('input_model.stl') # Convert it into a closed volume by filling any holes present in the original data set. solid_mesh = creation.convex_hull(mesh_surface) # Extract all sharp edges where two faces meet at angles greater than specified threshold value. sharp_edges = solid_mesh.edges_sharp # Save output files after conversion & edge extraction steps have been completed successfully. solid_mesh.export('output_solid_model.stl') with open('extracted_boundaries.txt', 'w') as f: for e in sharp_edges.tolist(): f.write("%s\n" % str(e)) ``` This script uses `trimesh`, a powerful package available under MIT license suitable both academically and commercially without restrictions regarding redistribution provided proper attribution is given when required according to licensing terms.