`HatchGpu.world_aabb` was built by iterating `model.boundary` — but
those vertices are stored as f32 offsets from `model.world_origin`
(precision anchor for UTM-scale WCS). So the AABB was in
*origin-relative* space, not the local space `view_proj` projects
from. `aabb_offscreen` (Phase 2.3) then asked "is this rect near (0,0)
in NDC?" instead of "is this rect at the hatch's actual position?" —
which culled in-view hatches whenever the camera moved off the
origin and rendered out-of-view ones near it.
Sub-pixel LOD (`aabb_below_pixel`, Phase 3.3) survived because it
measures a projected diagonal, which is translation-invariant.
Fixes:
- Add `world_origin` back when building `HatchGpu.world_aabb`, so the
stored rect is in absolute local space.
- 25 % margin on the viewport rect in `aabb_offscreen`, matching the
wire path's `view_world_aabb` margin — keeps hatches at the edge
rendered while panning.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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