# @thi.ng/geom-isec > 2D/3D shape intersection checks Latest version **4.0.95** (published 2026-08-25) · Apache-2.0 license · 0 weekly downloads ## Install ```sh npm install @thi.ng/geom-isec pnpm add @thi.ng/geom-isec yarn add @thi.ng/geom-isec bun add @thi.ng/geom-isec ``` ## Health **Score 70/100 (B)** — status: active. Positive: has types; esm support; no vulnerabilities; recently updated; high maintenance score; high quality score. Warnings: low downloads. ## Facts | | | |---|---| | Version | 4.0.95 | | Published | 2026-08-25 | | First published | 2019-02-05 | | Weekly downloads | 0 | | License | Apache-2.0 | | TypeScript types | bundled | | Module format | ESM | | Node | >=18 | | Dependencies | 4 | | Unpacked size | 51.3 KB | | Known vulnerabilities | 0 | | Install scripts | no | | Author | Karsten Schmidt | | Maintainers | thi.ng | | Keywords | 2d, 3d, bbox, circle, geometry, intersection, line, ray, rect, sphere, typescript | ## Links - npm: https://www.npmjs.com/package/@thi.ng/geom-isec - Repository: https://codeberg.org/thi.ng/umbrella - Homepage: https://thi.ng/geom-isec - Funding: https://github.com/sponsors/postspectacular - npm.io page: https://npm.io/package/@thi.ng/geom-isec ## Dependencies (4) - [@thi.ng/api](https://npm.io/package/@thi.ng/api.md) ^8.12.28 - [@thi.ng/math](https://npm.io/package/@thi.ng/math.md) ^5.15.17 - [@thi.ng/vectors](https://npm.io/package/@thi.ng/vectors.md) ^8.7.0 - [@thi.ng/geom-closest-point](https://npm.io/package/@thi.ng/geom-closest-point.md) ^2.1.223 ## Alternatives - [@openai/codex-sdk](https://npm.io/package/@openai/codex-sdk.md) — 731.4K weekly downloads - [babel-plugin-transform-react-jsx](https://npm.io/package/babel-plugin-transform-react-jsx.md) — 565.0K weekly downloads - [babel-helper-remove-or-void](https://npm.io/package/babel-helper-remove-or-void.md) — 508.5K weekly downloads - [@pnpm/store-controller-types](https://npm.io/package/@pnpm/store-controller-types.md) — 186.9K weekly downloads - [react-native-signature-canvas](https://npm.io/package/react-native-signature-canvas.md) — 155.6K weekly downloads ## Recent versions - 4.0.95 (latest) — 2026-08-25 - 4.0.94 — 2026-07-21 - 4.0.93 — 2026-07-02 - 4.0.92 — 2026-06-05 - 4.0.91 — 2026-05-23 - 4.0.90 — 2026-05-20 - 4.0.88 — 2026-05-11 - 4.0.87 — 2026-05-08 - 4.0.85 — 2026-04-26 - 4.0.84 — 2026-04-18 - 4.0.83 — 2026-04-09 - 4.0.82 — 2026-04-02 - 4.0.81 — 2026-03-21 - 4.0.80 — 2026-03-19 - 4.0.79 — 2026-03-11 - … 312 more at https://npm.io/package/@thi.ng/geom-isec/versions ## README # ![@thi.ng/geom-isec](https://codeberg.org/thi.ng/umbrella/media/branch/develop/assets/banners/thing-geom-isec.svg?3aa44d2b) [![npm version](https://img.shields.io/npm/v/@thi.ng/geom-isec.svg)](https://www.npmjs.com/package/@thi.ng/geom-isec) ![npm downloads](https://img.shields.io/npm/dm/@thi.ng/geom-isec.svg) [![Mastodon Follow](https://img.shields.io/mastodon/follow/109331703950160316?domain=https%3A%2F%2Fmastodon.thi.ng&style=social)](https://mastodon.thi.ng/@toxi) > [!NOTE] > This is one of 217 standalone projects. LLM-free, human-made and > cared for software, 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 --- _Source: https://npm.io/package/@thi.ng/geom-isec · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._