Package: polymesh
PolyMesh- A Python Library for Polygonal MeshesWarningPolyMesh is in the early stages of it's lifetime, and some concepts may change in the future. If you seek long-term stability, wait until version 1.0, which is planned to be released if the core concepts all seem to sit and the documentation covers all major concepts.ThePolyMeshlibrary aims to provide the tools to build and analyse poligonal meshes with complex topologies. Meshes can be built like a dictionary, using arbitarily nested layouts and then be translated to other formats includingVTKandPyVista. For plotting, there is also support forK3D,MatplotlibandPlotly.The data model is built aroundAwkward, which makes it possible to attach nested, variable-sized data to the points or the cells in a mesh, also providing interfaces to other popular libraries likePandasorPyArrow. Implementations are fast as implementations rely on the vector math capabilities ofNumPy, while other computationally sensitive calculations are JIT-compiled usingNumba.Here and there we also useNetworkX,SciPy,SymPyandscikit-learn.NoteImplementation of the performance critical parts of the library rely on the JIT-compilation capabilities of Numba. This means that the library performs well even for large scale problems, on the expense of a longer first call.HighlightsClasses to handle points, pointclouds, reference frames and jagged topologies.Array-like mesh composition with a Numba-jittable database model. Join or split meshes, attach numerical data and save to and load from disk.Simplified and preconfigured plotting facility using PyVista.Grid generation in 1, 2 and 3 dimensions for arbitrarily structured Lagrangian cells.A mechanism for all sorts of geometrical and topological transformations.A customizable nodal distribution mechanism to effortlessly pass around data between points and cells.Generation ofPseudo Peripheral Nodes,Rooted Level StructuresandAdjancency Matricesfor arbitrary polygonal meshes.Symbolic shape function generation for arbitrarily structured Lagrangian cells in 1, 2 and 3 dimensions.Connections to popular third party libraries.Projects using PolyMeshSigmaEpsilon- A Python library for computational solid mechanics.PyAxisVM- The official Python package ofAxisVM, a popular structural analysis and design software.DocumentationThedocumentationis built withSphinxusing thePyData Sphinx Themeand hosted onReadTheDocs. Check it out for the user guide, an ever growing set examples, and the API Reference.InstallationPolyMesh can be installed from PyPI usingpipon Python >= 3.7:>>> pip install polymeshTesting>>> python -m unittestHow to contribute?Contributions are currently expected in any the following ways:finding bugs
If you run into trouble when using the library and you think it is a bug, feel free to raise an issue.feedback
All kinds of ideas are welcome. For instance if you feel like something is still shady (after reading the user guide), we want to know. Be gentle though, the development of the library is financially not supported yet.feature requests
Tell us what you think is missing (with realistic expectations).examples
If you've done something with the library and you think that it would make for a good example, get in touch with the developers and we will happily inlude it in the documention.sharing is caring
If you like the library, share it with your friends or colleagues so they can like it too.AcknowledgementsAlthoughPolymeshworks withoutVTKorPyVistabeing installed, it is highly influenced by these libraries and works best with them around. Also shout-out for the developers ofNumPy,Scipy,Numba,Awkwardand all the third-party libraries involved in the project. Whithout these libraries the concept of writing performant, yet elegant Python code would be much more difficult.A lot of the packages mentioned on this document here and the introduction have a citable research paper. If you use them in your work through PolyMesh, take a moment to check out their documentations and cite their papers.Also, funding of these libraries is partly based on the size of the community they are able to support. If what you are doing strongly relies on these libraries, don't forget to press the :star: button to show your support.LicenseThis package is licensed under theMIT license.