# krzysztofzablocki/LineDrawing

Beatiful and fast smooth line drawing algorithm for iOS - as seen in Foldify.

Repository: https://github.com/krzysztofzablocki/LineDrawing
Canonical: https://ross.abutalabs.com/products/linedrawing
Homepage: http://twitter.com/merowing_
Language: Objective-C
License: NOASSERTION
License Family: other
Last push: 2022-07-19T10:36:02+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5245, "days_push": 1506, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1290, forks 207 (observed 2026-08-28T04:04:15.462078+00:00)

## What it is
An Objective-C library implementing a fast, smooth line drawing algorithm for iOS, using OpenGL for anti-aliased lines with speed-based stroke width. Originally created for the Foldify app and inspired by the Paper app's drawing style.

## Use cases
- draw smooth lines in an ios app
- implement a sketching or drawing feature like paper app
- render anti-aliased strokes with opengl
- add velocity-based stroke width to a drawing app
- build a finger-painting or doodle ui

## When to choose
- you need smooth, anti-aliased freehand drawing on iOS
- you want Paper-style speed-dependent stroke width
- you're already using Cocos2d or OpenGL in your iOS app

## When to avoid
- you need drawing on Android or cross-platform
- your project uses Swift/UIKit only and you don't want OpenGL/Cocos2d dependencies
- you need vector or text annotation features rather than freehand strokes

## Facets
- artifact type: library
- maturity: maintenance
- function: graphics, image-processing
- domain: mobile-development, graphics
- platform: cpp
- tags: objective-c, drawing, opengl, cocos2d, smooth-lines, stylus-drawing, game-development, ios, mobile

## Member repositories
- krzysztofzablocki/LineDrawing (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:15.462078+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:55:39.068962+00:00, confidence not recorded.
  - readme: https://github.com/krzysztofzablocki/LineDrawing (fetched 2026-08-28T04:04:15.462078+00:00, sha 6a19bd2adf75)
- Data as of 2026-08-30T08:39:29.467469+00:00.