Pulldraw

Pulldraw is a vector graphics tool and file format that centers on an interactive pull-based manipulation model. In Pulldraw, users shape curves by grabbing and dragging points along a path, with the system maintaining smoothness through a dynamic tension mechanism. The approach emphasizes direct, tactile control of line segments, offering real-time feedback as curves adjust to user input.

The concept emerged from design research into more expressive hand-drawn workflows and was explored through early prototypes in the mid-2010s. A community-driven implementation appeared in the late 2010s, and the project was later refined into a formal editor and accompanying file format. Pulldraw is typically presented as an open-source or community-supported tool, with ongoing experiments in interaction design and interoperability with other vector systems.

Core concepts in Pulldraw include real-time vector editing, pull-based manipulation of control points, automatic tangent continuation for smooth curves, and optional constraints to preserve geometric relationships. The editor generally supports layers, ranging from basic vector shapes to more complex paths, along with brush dynamics, pressure sensitivity for stylus input, snapping options, and keyboard-driven alternatives for precise control. The workflow is designed to facilitate sketch-to-vector refinement, making it suitable for concept art, UI prototyping, and technical illustration.

The Pulldraw file format stores vector primitives, layer structure, brush and tension parameters, and a history log of pull actions. Files typically use a dedicated extension (for example, .pdl) and are designed to be convertible to other formats such as SVG or JSON to support interoperability with other graphics tools.

Related topics include vector graphics editors, Bezier curves, SVG, and interactive drawing interfaces.