forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 4.7
de37ee04bf
Three changes to make paper-space viewports render correctly on UTM-scale drawings whose viewports were saved with default view_target=(0, 0, 0) and a view_center pointing at empty WCS: 1. **Auto-fit fallback.** When the saved view's WCS rect doesn't overlap the IQR-bounded content cluster (`world_offset ± local_extent_max`), override `view_center` with `world_offset` and recompute `view_height` to fit the cluster into the paper viewport. Matches AutoCAD's silent auto-fit-on-open for stale / uninitialized viewports; without it those viewports rendered blank. 2. **f64 projection inner loop.** The previous f32 path computed `(wire_offset_rel - target_offset_rel).dot(view_right) - view_center` by subtracting values at ~5e6 magnitude (f32 ULP ~0.5 m) to land on a small paper offset. The cancellation produced centimetre-scale jitter on paper output even when the model was clean. Reconstruct the wire WCS coord, subtract the display center, and dot-project in f64; cast to f32 only at the final paper position where magnitudes are bounded by the viewport rect. 3. **examples/inspect_viewports.rs** — diagnostic that dumps every viewport's saved view fields (view_target, view_center, view_height vs paper height, custom_scale, status flags) plus drawing-level insertion_units and model-space extents. Used to verify that acadrust's DWG reader reads view_height correctly; the `view_height == vp.height` patterns observed on real files turn out to be genuine "default 1:1" file content rather than a reader bug (a round-trip test through DwgWriter / DwgReader survives all per-viewport values). Also: switch the `acadrust` patch from `HakanSeven12/acadrust@feat/ expose-blockrecord-is-loaded` (a stale branch with the abandoned is_loaded experiment) to `hakanaktt/acadrust@main`. Upstream main now carries the layout paper-dimensions and mirrored-arc fixes that this branch used to add — plus PR #20's DXF reading fixes that the old branch was missing. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>