ToonCurvejs

ToonCurvejs is a JavaScript library for creating and rendering cartoon-style curves and outlines in web graphics. It provides tools to define curves using common representations such as Bezier and Catmull-Rom and to render them with a toon or cel-shaded appearance on HTML5 canvas or WebGL contexts.

Core features include curve construction and editing, path tessellation, programmable stroke styles with variable width and end caps, cel shading options, edge outlines, gradient fills, and export of curves to SVG or JSON. It ships with a WebGL rendering pipeline and a canvas fallback for broad compatibility, and supports animation by updating control points.

The API centers on a ToonCurvejs object with methods to add curves, set control points, configure rendering options, and render to a target drawing surface. Typical workflows involve creating a curve, applying a material or shader, optionally binding to a WebGL context, and drawing in an animation loop.

ToonCurvejs was released by an open-source team in the early 2020s and has evolved through multiple releases. It is distributed under an open-source license, with contributions from individual developers and organizations. Documentation and examples are hosted on its official repository.

The library is used in web illustration and animation projects seeking a hand-drawn aesthetic, and it aims for broad browser compatibility and active community support.