G Code Tool Radius Compensation

Purpose and use case: This tool computes radius compensated toolpaths in the XY plane for CNC operations, enabling accurate contouring and pocketing when the tool radius affects the intended path. It targets NC programmers, machinists, CAM engineers, and educators who need reliable offsets to drive G41/G42 style behavior or to produce ready to export coordinates. Conceptually, the tool offsets each segment by the tool radius along the normal direction toward the chosen side, while preserving path order and geometry. It supports both straight and arc segments, applying proper joins at corners to maintain continuity and minimize gouge or overcut. By exporting compensated coordinates or a G code snippet, it integrates into CAM pipelines or controller workflows and reduces manual offset calculations. Unique value lies in robust handling of mix of segment types, arc offset logic, and tunable tolerance to balance precision with performance. Use cases include milling a contour with a 6 mm endmill, offsetting pocket outlines for clean walls, or training on cutter compensation concepts without editing raw toolpaths.