forked from 1b-agent/opencadstudio-upstream
Christopher OverbeckandClaude Opus 5
1ac9309f85
Retaining a line's length added a P2PDistance constraint, whose gradient divides by the current distance. For a zero-length line the solver got a NaN Jacobian and its SVD fallback never returned, freezing the editor (e.g. ECONSTRAINT on a line drawn by clicking one point twice). Hold coincident endpoints together with per-axis differences instead. Control-point splines read without knots are given a degree their control points can carry (at most n - 1) and a clamped knot vector when a drawing loads. Generating knots for fewer points than the degree underflowed during DWG write: a panic in debug builds, an unbounded allocation in release, and reachable from autosave. A lone control point with no knots or fit points is purged as corrupt. Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>