forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 4.8
bca8958025
Computed snaps (midpoint/nearest/perpendicular/intersection/extension/ apparent/grid) reconstructed the snap point from f32 `wire.points` (absolute high half), so at UTM-scale they landed ~0.5 m off the geometry while endpoint/center (sourced from f64 key_vertices/snap_pts) stayed correct. Now they rebuild each vertex from points + points_low (the double-single low residual) and run the geometry in f64: - snap() cursor + geometry helpers (nearest_on_segment, perp_foot, seg_intersect_xy, extension_snap) are DVec3; wp_f64() reconstructs each vertex; midpoint uses f64 key_vertices directly (was downcast to f32). - snap callers pass the precise DVec3 cursor. Snap capture at deep zoom: the wire-AABB cull compared a sub-millimetre snap radius against f32 bounds quantized by ~1 ulp (~0.7 m at 5.7e6), wrongly excluding wires under the cursor. Pad the cull by the bound's own f32 quantization so it never rejects an in-range wire. Rubber-band previews (line/circle/arc/ellipse/rect/polygon) built f32 absolute points with an empty points_low, so the wire pass (relative-to- eye) drew them ~0.5 m off the cursor at UTM. Add WireModel::solid_f64, which splits f64 points into the double-single high/low pair; previews now track the cursor exactly. Known: snapping at extreme zoom on large drawings spikes CPU (per-move snap cost) — deferred. Co-Authored-By: Claude Opus 4.8 <[email protected]>