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diag(render): flap re-diagnosed as portal-flood re-clip DRIFT; physics + camera REFUTED

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The 2026-06-08 AM "physics rest micro-jitter" diagnosis is refuted with primary
evidence (door-recheck 216K standstill records: 0 position re-snaps; player
byte-stable during the flap). Two adversarial verification sub-agents confirmed:

- Retail roots the render at the camera viewer_cell (swept from the player via
  SmartBox::update_viewer 0x453ce0; DrawInside(viewer_cell) 0x453aa0) and toggles
  DrawInside / LScape::draw -- so acdream's eye-cell rooting + inside/outside
  toggle are RETAIL-FAITHFUL. The locked-design "root at player cell" is wrong.
- The flap is render membership instability, eye-motion-driven: the visible-cell
  set oscillates (8<->3) as the eye sweeps monotonically. Root = the
  re-enqueue-on-growth DRIFT (PortalVisibilityBuilder.cs:322, MaxReprocessPerCell
  =16) re-clipping each grown cell every round -> sub-cm eye jitter flips membership.

Fix (spec, not yet implemented): verbatim port of retail's enqueue-once flood
(ConstructView + AddViewToPortals): enqueue once on first discovery, clip each
cell's portals once, union late growth in place (AddToCell) + draw-reorder
(FixCellList), never re-enqueue. Kills the drift; rooting/camera/seal untouched.

This commit lands VERIFIED GROUNDWORK + design only:
- spec: docs/superpowers/specs/2026-06-08-portal-flood-enqueue-once-port-design.md
- findings: docs/research/2026-06-08-flap-physics-diagnosis-REFUTED-its-render-membership.md
- [pv-input] probe gains rawPlayer + yaw (disambiguates the varying input)
- 4 GREEN physics rest-stability tests (prove rest is bit-stable -> flap not physics)
- apparatus: launch-flap-capture.ps1, analyze_flap_live.py, find_burst.py
- captured fixtures: tests/.../Fixtures/flap-doorway/0xA9B4017{0..5}.json

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-06-08 11:21:46 +02:00
parent d6aa526dd3
commit 6c3a96b26e
14 changed files with 8231 additions and 1 deletions
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8
src/AcDream.App/Rendering/GameWindow.cs
View file

@ -7569,8 +7569,14 @@ public sealed class GameWindow : IDisposable
{
var vp = envCellViewProj;
char pvOutRoot = ReferenceEquals(clipRoot, _outdoorNode) ? 'Y' : 'n';
// 2026-06-08: disambiguate the idle flap. eye=camera eye-point (drives the flood);
// player=RenderPosition (Lerp of physics, what the eye chases); rawPlayer=raw physics
// body Position; yaw=camera/player heading (F8 rad to catch micro-drift). If the flood
// flickers while idle, exactly one of {eye, player, rawPlayer, yaw} is the varying input.
var pvRawPlayer = _playerController?.Position ?? playerViewPos;
float pvYaw = _playerController?.Yaw ?? 0f;
Console.WriteLine(System.FormattableString.Invariant(
$"[pv-input] outRoot={pvOutRoot} flood={pvFrame.OrderedVisibleCells.Count} eye=({camPos.X:F6},{camPos.Y:F6},{camPos.Z:F6}) player=({playerViewPos.X:F6},{playerViewPos.Y:F6},{playerViewPos.Z:F6}) vp=[{vp.M11:F6} {vp.M13:F6} {vp.M22:F6} {vp.M31:F6} {vp.M33:F6} {vp.M41:F6} {vp.M42:F6} {vp.M43:F6}]"));
$"[pv-input] outRoot={pvOutRoot} flood={pvFrame.OrderedVisibleCells.Count} eye=({camPos.X:F6},{camPos.Y:F6},{camPos.Z:F6}) player=({playerViewPos.X:F6},{playerViewPos.Y:F6},{playerViewPos.Z:F6}) rawPlayer=({pvRawPlayer.X:F6},{pvRawPlayer.Y:F6},{pvRawPlayer.Z:F6}) yaw={pvYaw:F8} vp=[{vp.M11:F6} {vp.M13:F6} {vp.M22:F6} {vp.M31:F6} {vp.M33:F6} {vp.M41:F6} {vp.M42:F6} {vp.M43:F6}]"));
}
sigPvFrame = pviewResult.PortalFrame;