gcode-preview is a TypeScript library for rendering 3D-print toolpath previews from G-code files in web applications. It parses G-code command streams, interprets motion and extrusion commands, organizes the resulting paths into layers and tool segments, and renders them as either flat colored lines or volumetric tubes using Three.js. The library is structured as a pipeline of independently testable modules: a line-oriented parser, a stateful interpreter, a job/path model, and a Three.js scene manager. A Vue 3 demo application is included to exercise the library, but the repository is fundamentally a reusable npm package with ESM and UMD builds, unit tests, Firebase-hosted demo infrastructure, and publishing CI.
MatterControl is a comprehensive, open-source desktop application for controlling and enhancing 3D printing workflows. It integrates slicing, printer management, 3D model design and editing, library management, and G-code streaming into a single GUI built on the MatterHackers Agg framework. The codebase is large (2000+ files) and spans multiple subprojects: printer communication (serial, TCP/IP, X3G), slicing engines (MatterSlice, gsSlicer, SLA), 3D design tools (primitives, boolean operations, path editing), and a plugin system. The architecture follows a monolithic desktop application pattern with heavy use of custom UI widgets and a decorator-based G-code processing pipeline. While feature-rich and historically active, the project shows signs of technical drift: reliance on an older .NET Framework (4.7.2), a bundled port of SQLite (Community.CsharpSqlite), and numerous obsolete or versioned classes (e.g., `MirrorObject3D` → `MirrorObject3D_2`). The codebase contains many reusable patterns (e.g., GCodeStream decorators, UIField hierarchy, plugin system) but extraction would require significant effort due to tight coupling with the MatterControl domain model.
This repository is an Inkscape extension (gcodetools) that converts SVG vector paths into G-code for CNC machines. It supports a wide range of manufacturing processes including path-to-Gcode export, area clearing (pocketing), engraving with shaped cutters, lathe turning, plasma/laser cutting, box cutter path preparation, graffiti plotting, and bender operations. The extension is activated through Inkscape's extension menu and presents a multi-tabbed interface defined by .inx descriptor files. The core logic resides in a monolithic Python script (gcodetools-dev.py, ~3500 lines) that implements geometric algorithms such as biarc interpolation, cubic superpath offsetting, curvature-based clipping, and a genetic algorithm for part arrangement. The system also includes a post-processor that allows users to apply custom transformations (scale, flip, regex) to the generated G-code via Python expressions. External dependencies include Inkscape's inkex module, Python 2, and optionally numpy/scipy. The codebase is heavily tied to the Inkscape extension API and is not designed as a standalone library. It is primarily targeted at CNC hobbyists and small workshops, with documentation and support in Russian and English.