Model space held a full, camera-independent, un-culled wire set with a
stable content id, so pan/zoom re-drew without re-tessellating or
re-uploading and idle frames collapsed to a single blit. Paper did none of
that: the sheet was camera-keyed (full re-tess every pan/zoom), content
viewports re-baked per zoom step with their own frustum cull + LOD, and a
per-frame wire_force_nonce forced a GPU re-upload every frame AND poisoned
render_signature so paper never hit the single-blit scene cache.
Route every space through one Scene::resident_wires_for(block, anno, frozen):
the full, un-culled, LOD-free set per (block, ambient bg, anno, frozen) key,
held resident and stamped with a stable WIRE_CONTENT_GEN id. Model tiles,
BEDIT, the paper sheet (a thin border-drop + printable-area dressing over the
resident base) and paper content viewports all share it. When annotation is
inert (PSLTSCALE off and no annotative entity, cached per epoch) the per-
viewport scale is normalized away so every viewport reuses one tessellation.
Result: paper pan/zoom does zero re-tessellation and zero wire re-upload, and
paper now hits the single-blit scene cache exactly like model. Deletes
wire_force_nonce, the per-viewport height/view wire cache, and view_cull_aabb.
Tradeoff (deliberate, matches model): no cull/LOD anywhere.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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