#  [](https://www.npmjs.com/package/@thi.ng/geom-subdiv-curve)  [](https://mastodon.thi.ng/@toxi) > [!NOTE] > This is one of 216 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) - [Available subdivision schemes](#available-subdivision-schemes) - [Chaikin subdivision](#chaikin-subdivision) - [Cubic subdivision](#cubic-subdivision) - [Dyn-Levin-Gregory subdivision](#dyn-levin-gregory-subdivision) - [Displacement subdivision](#displacement-subdivision) - [Split at midpoints](#split-at-midpoints) - [Split at thirds](#split-at-thirds) - [Status](#status) - [Related packages](#related-packages) - [Installation](#installation) - [Dependencies](#dependencies) - [API](#api) - [Authors](#authors) - [License](#license) ## About Freely customizable, iterative nD subdivision curves for open / closed geometries. This is a support package for [@thi.ng/geom](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/geom). Based in principle on: - [Generating subdivision curves with L−systems on a GPU](http://algorithmicbotany.org/papers/subgpu.sig2003.pdf) - Clojure version [thi.ng/geom-clj](http://thi.ng/geom-clj). ### Available subdivision schemes The following schemes are available as presets and their effects illustrated. #### Chaikin subdivision [`SUBDIV_CHAIKIN`](https://docs.thi.ng/umbrella/geom-subdiv-curve/variables/SUBDIV_CHAIKIN.html) is supported for open & closed geometries.   #### Cubic subdivision [`SUBDIV_CUBIC`](https://docs.thi.ng/umbrella/geom-subdiv-curve/variables/SUBDIV_CUBIC.html) is only supported for closed geometries (at current).  #### Dyn-Levin-Gregory subdivision [`SUBDIV_DLG`](https://docs.thi.ng/umbrella/geom-subdiv-curve/variables/SUBDIV_DLG.html) is only supported for closed geometries (at current).  #### Displacement subdivision [`SUBDIV_DISPLACE`](https://docs.thi.ng/umbrella/geom-subdiv-curve/variables/SUBDIV_DISPLACE.html) is a higher order, customizable subdivision and supported for open & closed geometries.   #### Split at midpoints [`SUBDIV_MID`](https://docs.thi.ng/umbrella/geom-subdiv-curve/variables/SUBDIV_MID.html) is supported for open & closed geometries.   #### Split at thirds [`SUBDIV_THIRDS`](https://docs.thi.ng/umbrella/geom-subdiv-curve/variables/SUBDIV_THIRDS.html) is supported for open & closed geometries.   ## Status **STABLE** - used in production [Search or submit any issues for this package](https://codeberg.org/thi.ng/umbrella/issues?q=%5Bgeom-subdiv-curve%5D) ## Related packages - [@thi.ng/geom-splines](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/geom-splines) - nD cubic & quadratic curve analysis, conversion, interpolation, splitting ## Installation ```bash yarn add @thi.ng/geom-subdiv-curve ``` ESM import: ```ts import * as gsc from "@thi.ng/geom-subdiv-curve"; ``` Browser ESM import: ```html ``` [JSDelivr documentation](https://www.jsdelivr.com/) For Node.js REPL: ```js const gsc = await import("@thi.ng/geom-subdiv-curve"); ``` Package sizes (brotli'd, pre-treeshake): ESM: 802 bytes ## Dependencies - [@thi.ng/transducers](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/transducers) - [@thi.ng/vectors](https://codeberg.org/thi.ng/umbrella/src/branch/develop/packages/vectors) ## API [Generated API docs](https://docs.thi.ng/umbrella/geom-subdiv-curve/) ```ts import * as gsc from "@thi.ng/geom-subdiv-curve"; gsc.subdivide([[0,0], [100,0], [100,100], [0,100]], [gsc.SUBDIV_CHAIKIN], true); ``` ## Authors - [Karsten Schmidt](https://thi.ng) If this project contributes to an academic publication, please cite it as: ```bibtex @misc{thing-geom-subdiv-curve, title = "@thi.ng/geom-subdiv-curve", author = "Karsten Schmidt", note = "https://thi.ng/geom-subdiv-curve", year = 2016 } ``` ## License © 2016 - 2026 Karsten Schmidt // Apache License 2.0