#  [](https://www.npmjs.com/package/@thi.ng/geom-isec)  [](https://mastodon.thi.ng/@toxi) > [!NOTE] > This is one of 214 standalone projects, maintained as part > of the [@thi.ng/umbrella](https://codeberg.org/thi.ng/umbrella/) ecosystem > and anti-framework. > > 🚀 Please help me to work full-time on these projects by [sponsoring > me](https://codeberg.org/thi.ng/umbrella/src/branch/develop/CONTRIBUTING.md#donations). > Thank you! ❤️ - [About](#about) - [3D tests](#3d-tests) - [Status](#status) - [Installation](#installation) - [Dependencies](#dependencies) - [API](#api) - [Authors](#authors) - [License](#license) ## About 2D/3D shape intersection checks. This is a support package for [@thi.ng/geom](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/geom). | Type | Circle | Line | Poly | Ray | Rect | Tri | |--------|:------:|:----:|:----:|:---:|:----:|:---:| | Circle | ✓ | | | | | | | Line | | ✓ | | | | | | Point | ✓ | ✓ | ✓ | | ✓ | ✓ | | Ray | ✓ | ✓ | ✓ | | ✓ | | | Rect | ✓ | | | | ✓ | | ### 3D tests | Type | AABB | Plane | Point | Ray | Sphere | |--------|:----:|:-----:|:-----:|:---:|:------:| | AABB | ✓ | | | | ✓ | | Plane | | ✓ | | | | | Point | ✓ | | | | ✓ | | Ray | ✓ | ✓ | | | ✓ | | Sphere | | | | | ✓ | Current implementations partially based on [toxiclibs](http://toxiclibs.org) (Java) and Clojure version of [thi.ng/geom](http://thi.ng/geom). ## Status **STABLE** - used in production [Search or submit any issues for this package](https://codeberg.org/thi.ng/umbrella/issues?q=%5Bgeom-isec%5D) ## Installation ```bash yarn add @thi.ng/geom-isec ``` ESM import: ```ts import * as isec from "@thi.ng/geom-isec"; ``` Browser ESM import: ```html ``` [JSDelivr documentation](https://www.jsdelivr.com/) For Node.js REPL: ```js const isec = await import("@thi.ng/geom-isec"); ``` Package sizes (brotli'd, pre-treeshake): ESM: 3.27 KB ## Dependencies - [@thi.ng/api](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/api) - [@thi.ng/geom-closest-point](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/geom-closest-point) - [@thi.ng/math](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/math) - [@thi.ng/vectors](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/vectors) Note: @thi.ng/api is in _most_ cases a type-only import (not used at runtime) ## API [Generated API docs](https://docs.thi.ng/umbrella/geom-isec/) ```ts import * as isec from "@thi.ng/geom-isec"; const res = isec.intersectLineLine([0, 0], [100, 50], [50, 100], [50, -100]); // { type: 4, isec: [ 50, 25 ], alpha: 0.5, beta: 0.375, det: -20000 } res.type === isec.IntersectionType.INTERSECT // true ``` ## Authors - [Karsten Schmidt](https://thi.ng) If this project contributes to an academic publication, please cite it as: ```bibtex @misc{thing-geom-isec, title = "@thi.ng/geom-isec", author = "Karsten Schmidt", note = "https://thi.ng/geom-isec", year = 2013 } ``` ## License © 2013 - 2026 Karsten Schmidt // Apache License 2.0