{"id":34543779,"url":"https://github.com/ameli/extract-boundary","last_synced_at":"2026-05-27T12:03:54.387Z","repository":{"id":6451612,"uuid":"7691173","full_name":"ameli/extract-boundary","owner":"ameli","description":"Extract boundary of 2D grids","archived":false,"fork":false,"pushed_at":"2022-10-26T01:54:13.000Z","size":1808,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2023-04-06T13:56:30.523Z","etag":null,"topics":["boundary-detection","mesh-processing","paraview-plugin","visualization","vtk"],"latest_commit_sha":null,"homepage":"https://ameli.github.io/extract-boundary/","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"other","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/ameli.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.txt","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2013-01-18T17:44:27.000Z","updated_at":"2023-03-05T14:46:47.000Z","dependencies_parsed_at":"2023-01-11T17:00:39.277Z","dependency_job_id":null,"html_url":"https://github.com/ameli/extract-boundary","commit_stats":null,"previous_names":[],"tags_count":0,"template":null,"template_full_name":null,"purl":"pkg:github/ameli/extract-boundary","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ameli%2Fextract-boundary","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ameli%2Fextract-boundary/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ameli%2Fextract-boundary/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ameli%2Fextract-boundary/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/ameli","download_url":"https://codeload.github.com/ameli/extract-boundary/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ameli%2Fextract-boundary/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":33564876,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-05-27T02:00:06.184Z","response_time":53,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["boundary-detection","mesh-processing","paraview-plugin","visualization","vtk"],"created_at":"2025-12-24T06:53:43.947Z","updated_at":"2026-05-27T12:03:54.382Z","avatar_url":"https://github.com/ameli.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Extract Boundary\n\nThis program extracts all __inner__ and __outer__ boundaries of 2D grids and identifies __zero-velocity__ boundary points. Moreover, __inward__ or __outward__ normal vectors on boundary points are calculated. You can use 2D grids with __any type of cell__ and various file extensions such as `*.vtk` and `*.vtu`.\n\n## User Guide\nPlease refer to [Documentation page](https://ameli.github.io/extract-boundary) or [doc/UserGuide.pdf](https://github.com/ameli/extract-boundary/raw/main/doc/UserGuide.pdf).\n\n## Quick installation\nYou may install by building source or getting the ready package from Ubuntu repos.\n\n### 1. Building from source\n\nJust download the [installer](https://raw.github.com/ameli/extract-boundary/main/installer) and do the following:\n\n    $ sudo chmod +x installer\n    $ sudo ./installer\n\n### 2. Ubuntu Package\n\nFor Ubuntu users, the package has been added to the Ubuntu repository. Type in terminal:\n\n    $ sudo add-apt-repository ppa:ameli/extractboundary\n    $ sudo apt-get update\n    $ sudo apt-get install extractboundary\n\n## Sample Usage\n\nYou may use the code either in command line or as a ParaView plugin.\n\n### 1. Command Line\n\n* Specifying input and output paths within files:\n\n    `$ extractboundary /InputPath/InputData.vtk /OutputPath/OutputData.vtk`\n\n* No output file is specifies. Default name will be used for output file:\n\n    `$ extractboundary InputData.vtk`\n\n* Using options: \n    * outward normals (with -n)\n    * search all inner and outer boundaries (with -s)\n    * identify zero-velocity points (with -z)\n\n    `$ extractboundary InputData.vtk OutputData.vtk -n outward -s all -z`\n\n### 2. ParaView Plugin\n\nIn ParaView, from _tools_ menu open _Manage Plugins_. Then load [`bin/libExtractBoundary.so`](https://github.com/ameli/extract-boundary/raw/main/bin/libExtractBoundary.so) file. Next, in _Filters_ menu go to _Extensions_ and apply _Extract Boundary_ filter to your pipeline.\n\nYou may refer to [UserGuide](https://github.com/ameli/extract-boundary/raw/main/doc/UserGuide.pdf) or [wiki](https://github.com/ameli/extract-boundary/wiki/Extract-Boundary) for picture illustrations.\n\n## License\n\nIts free and open source under GNU/zlib license. Please see [LICENSE.txt](https://raw.github.com/ameli/extract-boundary/main/LICENSE.txt) for terms.\n\n## Author\n\nSiavash Ameli  \n[Shadden Research Group](http://shaddenlab.berkeley.edu/)  \nUniversity of California, Berkeley\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fameli%2Fextract-boundary","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fameli%2Fextract-boundary","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fameli%2Fextract-boundary/lists"}