The moving-fixture divergence was the building degrade ladder:
GfxObjDegradeInfo::get_degrade @0x0051e4b0 (Ghidra-verified - BN's
FPU-flag pseudo-C misread BOTH arm selection and one formula) slides
each level's threshold from ideal toward MAX as the multiplier
approaches 1, and the live client runs the positive arm at ~0.99, so
level 0's portal-bearing BSP survives to ~max_dist (48 for the Holtburg
cottages), not ideal (24). The recon note's "deg_mul = -0.99" was a
sign misread; the negative arm's threshold slides toward MIN and
contradicts the fixtures from both directions. With the two-arm port,
holtburg-walkout, holtburg-transitions, and holtburg-walkabout pass
every pairable frame - the walkout-F2 microscope's prediction
(103,100 | 100x3 | 124 through the cottage exit views) landed exactly.
Also this round, falsified and reverted: a BN-driven swap of the
portal walker's negative/in-plane arms (Ghidra shows side 1 = negative
EMITS, side 2 = in-plane does not - the original port was correct; the
swap broke four fixtures). The walker docs and unit tests now pin the
Ghidra-verified truth table.
Parked with findings: foundry-entry F67 (right flood set, one
plane-side classification at the +/-eps boundary orders 11d before
116/118) and doorway-still (retail shows zero floods at a pose one
meter from walkout-F2's flooding pose; multi-portal clip boundary).
Suites: Walk 124/3 skips; hermetic 6,687/0.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The offline degrade probe proved the mechanism: every Holtburg building
carries PORT nodes ONLY in its level-0 GfxObj (out to ~24-48 m); every
degraded level has zero. Retail walks the CURRENT degrade level BSP
(part->gfxobj[deg_level]) - that is what limits look-in punches to the
nearest buildings. WalkBuilding gains the degrade ladder +
SelectDrawingBsp (band pick; UpdateViewerDistance hysteresis is a port
TODO), the walk selects per viewer distance, the adapter builds
per-level BSPs, and the stab-list load rule (CLandBlock::init_buildings
@0052fd80: a full-res block loads exactly its buildings portal stab
cells) replaces load-everything in the landscape builder. The sweep now
shows clean rosters with all far-building punches gone; remaining
deltas: the near buildings 001a/0022 (50 m/28 m center distance vs the
48 m band edge - sphere-adjusted distance/hysteresis to port) and the
one ring-1 frustum boundary pair (aab50002/a9b3003c).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
WalkBuildingPortals transcribes the portal-only drawing-BSP walk
(BSPTREE/BSPNODE::build_draw_portals_only @0x00539860/@0x0053c100,
BSPPORTAL::portal_draw_portals_only @0x0053d870 - opposite-child-first
= far-to-near emission, IN_PLANE PORT arm emits nothing),
PView::DrawPortal @0x005a5ab0 (stab add/remove_views around the
look-in, DrawCells on pass-2 success), and the CBldPortal
PView::ConstructView overload @0x005a59a0 (side must EQUAL the authored
portal_side, clip survival, Visible destination, punch on pass 1, flood
recursion on pass 2). Punch surfaces via the pass sink for FW1
conformance; the depth-fan submission itself is FW2. Six tests: BSP
emission order both viewer sides, in-plane suppression, pass-1
punch-no-flood, pass-2 flood + DC event, sidedness rejection, unloaded
destination skip.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
