trimesh - Serbipunk/notes GitHub Wiki
Features
https://github.com/mikedh/trimesh/blob/main/README.md#features
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Import meshes from binary/ASCII STL, Wavefront OBJ, ASCII OFF, binary/ASCII PLY, GLTF/GLB 2.0, 3MF, XAML, 3DXML, etc.
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Import and export 2D or 3D vector paths from/to DXF or SVG files (不理解这2个格式)
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Import geometry files using the GMSH SDK if installed (BREP, STEP, IGES, INP, BDF, etc) (不理解)
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Export meshes as binary STL, binary PLY, ASCII OFF, OBJ, GLTF/GLB 2.0, COLLADA, etc.
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Export meshes using the GMSH SDK if installed (Abaqus INP, Nastran BDF, etc)
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Preview meshes using pyglet or in- line in jupyter notebooks using three.js （值得看一下three.js）
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Automatic hashing of numpy arrays for change tracking using MD5, zlib CRC, or xxhash
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Internal caching of computed values validated from hashes
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Calculate face adjacencies, face angles, vertex defects(顶点缺陷), etc. 面片相关计算
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Calculate cross sections （交叉区域）, i.e. the slicing operation used in 3D printing。 物体关系相关计算
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Slice meshes with one or multiple arbitrary planes and return the resulting surface 细分面片
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Split mesh based on face connectivity using networkx (), graph-tool, or scipy.sparse 细分面片(networkx 图论工具)
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Calculate mass properties, including volume, center of mass, moment of inertia, principal components of inertia vectors and components 堆属性算法
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Repair simple problems with triangle winding, normals, and quad/tri holes (修复工具么？)
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Convex hulls of meshes (面片结构的凸包)
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Compute rotation/translation/tessellation(镶嵌) invariant identifier and find duplicate meshes （mesh的去重）
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Determine if a mesh is watertight(水密性), convex, etc.
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Uniformly sample the surface of a mesh
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Ray-mesh queries including location, triangle index, etc.
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Boolean operations on meshes (intersection, union, difference) using OpenSCAD or Blender as a back end. Note that mesh booleans in general are usually slow and unreliable （几乎不可用特性）
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Voxelize watertight meshes (体素化) （INTRESTING）
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Volume mesh generation (TETgen) using Gmsh SDK
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Smooth watertight meshes using laplacian smoothing algorithms (Classic, Taubin, Humphrey) （表面平滑）
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Subdivide faces of a mesh （细分）
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Minimum volume oriented bounding boxes for meshes （取得外接盒）
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Minimum volume bounding spheres （取得外界椭球）
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Symbolic integration of functions over triangles （？？联想不到）
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Calculate nearest point on mesh surface and signed distance (计算最近点)
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Determine if a point lies inside or outside of a well constructed mesh using signed distance （点、物体关系）
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Primitive objects (Box, Cylinder, Sphere, Extrusion) which are subclassed Trimesh objects and have all the same features (inertia, viewers, etc) （基础几何形状）
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Simple scene graph and transform tree which can be rendered (pyglet window, three.js in a jupyter notebook, pyrender) or exported. （可渲染的场景树）
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Many utility functions, like transforming points, unitizing vectors, aligning vectors, tracking numpy arrays for changes, grouping rows, etc.