radar: draw the MAP GEOMETRY -- staticEntities was empty on two stacked gates

Playtester DOS-binary comparison: our radar showed blips + wedge but NO map
outlines (the DOS reference draws the whole arena).  MapDisplay::DrawStatic
was always a faithful, working drawer of the rtype-18 GaugeImage outlines
(the same records docs/MAPS.html renders) -- it drew nothing because
staticEntityList was empty, from TWO stacked port regressions; fixing either
alone is insufficient:

1. GaugeRenderer::RebuildEntityGrid (per frame) Clear()ed BOTH grids and
   refilled from the DYNAMIC host iterators only -- the 528 static-flagged
   (0x20C) UnscalableTerrain map placements, which carry most arena outlines
   (arenall: 59 static vs 3 dynamic), were structurally excluded, and the
   wipe also destroyed anything the interest feed contributed.
2. The notify feed's static gate was transcribed as
   Terrain::GetClassDerivations() -- but the shipped content has ZERO Terrain
   records (census: 1008x UnscalableTerrain + 789x CulturalIcon, both
   deriving from Entity in our headers), so the predicate was dead code and
   rejected 100% of map geometry.  @0x4e6ef8 was almost certainly
   UnscalableTerrain's derivation (or the shipped machine's MUNGA derived
   UnscalableTerrain from Terrain).  [T3 on which; the corrected gate is
   what the content requires.]

FIX:
  - staticEntities is now PERSISTENT: filled ONCE per mission inside
    RebuildEntityGrid (AllEntityIterator; keep UnscalableTerrain-derived
    entities carrying a rtype-18 GaugeImage -- covers the static walls AND
    the dynamic CulturalIcon props the 2026-07-12 phantom-red-pip fix routed
    here).  Deterministic whether or not the interest feed delivers.
  - Per-frame RebuildEntityGrid now rebuilds only the MOVING grid (Mover
    filter + dead-mech skip unchanged).
  - Lifecycle: cleared + refill-armed at LinkToEntity (the pod process hosts
    many missions); the gate-corrected remove-notify prunes destroyed
    statics; the gate-corrected add-notify is guarded pre-fill so nothing
    double-adds.
  - BT_RADAR_LOG=1 prints '[radar] static grid filled: N'.

Verified live (glass, DEV.EGG): fill reports 326 map entities; structure
outlines now draw on the radar at the correct zoom; blips + sweep wedge
unregressed.  KB: GAUGE_COMPOSITE row 24 + the Phase-4 staticEntities
deferral resolved.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/GAUGE_COMPOSITE.md

@@ -629,7 +629,8 @@ attributes published on Emitter+Myomers — see the AUDIT finding A addendum bel
 Byte-exact re-base of the PoweredSubsystem:HeatSink LEAF (Sensor/Emitter/Myomers) → radarPercent heat penalty
 (delete the sensor.cpp:287-288 guard — ✅ LANDED: the guard is deleted and the leaf is byte-exact,
 sensor.cpp:407-413) + the raw-offset cluster reads (partially locked since — MechWeapon byte-exact);
-radar pip/name symbology + staticEntities (task #17, under reconstruction 2026-07-12);
+radar pip/name symbology + staticEntities (task #17: pips landed the real L4GaugeImage path;
+✅ staticEntities RESOLVED 2026-08-13, branch radar-static-geometry — see row 24);
 CycleDisplayMode→ModeManager mask (✅ RESOLVED 2026-07-19, Gitea #6 [T2]: @4d1ae4 relabeled the
 NotifyOfDisplayModeChange override (vtbl+0x4C) and made virtual; desktop 'N'/pad RightThumb →
 CycleDisplayModeNow; secondary schematic swap dama→crit→heat pixel-verified via
@@ -687,7 +688,7 @@ reconfigure/externalConfigure); parse-skip list EMPTY ([gskip]=0), all 50 attr b
 | 21 | Eng myomer page: seek-step lamp | Myomers@0x320 INFERRED (ctor @004c8df4 not in the decomp export) | marked in code | T3 | CORRECT (best-effort; flagged) |
 | 22 | Eng page: linked heat-sink number (hs+0x1d4 guarded raw) | PrepEngr numeric #2 | marked BEST-EFFORT (guarded) | T3 | CORRECT (guarded; flagged) |
 | 23 | sec: radar map (wedge/blips/scale) | Mech Radar* attrs; wedge ← Torso::currentTwist@0x1D8 (Gitea #1) | #1 [T2]; LIVE: blips + wedge render, zoom via SetTargetRange | T2 | CORRECT |
-| 24 | sec: radar pip/name symbology | GetVideoObject/LookUpPip/GetNameID | task #17 under reconstruction — cross-blip stand-in | T3 | DEFERRED-FEED |
+| 24 | sec: radar pip/name symbology + MAP GEOMETRY | GetVideoObject/LookUpPip/GetNameID; MapDisplay::DrawStatic ← staticEntities | pips: the real L4GaugeImage path landed (task #17). **Map geometry RESOLVED 2026-08-13** (branch radar-static-geometry, playtester DOS comparison): DrawStatic was always faithful but staticEntities was EMPTY — (1) the per-frame RebuildEntityGrid Clear()+dynamic-only refill structurally excluded the 528 static-flagged UnscalableTerrain placements (arenall: 59 static vs 3 dynamic), and (2) the notify gate was transcribed as Terrain, which matches ZERO shipped records (1008 UnscalableTerrain + 789 CulturalIcon derive from Entity — @0x4e6ef8 was almost certainly UnscalableTerrain's derivation). Fix: staticEntities is now persistent, filled once per mission (AllEntityIterator, UnscalableTerrain-derived + rtype-18 pip; `[radar] static grid filled: N` under BT_RADAR_LOG), reset at LinkToEntity, pruned by the gate-corrected remove notify. Verified live: 326 entities filled, arena outlines draw | T2 | CORRECT |
 | 25 | sec: headingPointer needle + numeric | YawPitchRoll decomposition (engine-convention port of euler[0]) | LIVE: 089→120 while turning under BT_GOTO | T2 | CORRECT |
 | 26 | sec: numericSpeed | LinearSpeed (abs(adv)/dt) | LIVE: 0 parked → 176-182 walking | T2 | CORRECT (units question stays open) |
 | 27 | sec: digitalClock MISSION TIME | engine mission clock (format enum arg) | LIVE: 09:19→06:04 counting | T0/T2 | CORRECT |

engine/MUNGA/GAUGREND.cpp

@@ -2798,6 +2798,7 @@ GaugeRenderer::GaugeRenderer():
 {
 	Test_Tell("GaugeRenderer::GaugeRenderer()\n");
 	Check_Pointer(this);
+	staticEntitiesFilled = False;	// radar map geometry: filled per mission
 
 	int
 		i;
@@ -3015,6 +3016,13 @@ void
 
 	Test_Tell("GaugeRenderer::LinkToEntity(" << entity << ")\n");
 
+	// RADAR MAP GEOMETRY (2026-08-13): a new mission link invalidates the
+	// persistent static grid -- clear it and let the next RebuildEntityGrid
+	// refill from the new mission's entities (the pod process hosts many
+	// missions back to back; stale pointers must not cross rounds).
+	staticEntities.Clear();
+	staticEntitiesFilled = False;
+
 	//
 	//--------------------------------------------------------------------
 	// Inform all gauges
@@ -3613,7 +3621,6 @@ void
 	Check(this);
 
 	movingEntities.Clear();
-	staticEntities.Clear();
 
 	if (application == NULL)
 	{
@@ -3629,13 +3636,18 @@ void
 	// projectiles that AllEntityIterator would flood the grid with -- iterate the
 	// dynamic masters (the local + AI/dummy vehicles) plus the dynamic replicants
 	// (peer vehicles in multiplayer).
-	// CLASSIFICATION (the phantom-red-pip fix, 2026-07-12): the dynamic
-	// iterators ALSO surface non-Mover world entities (the map's CulturalIcon
-	// props, class 0x5E, register dynamic on this port) -- unsorted, they drew
-	// through the radar's MOVING loop as RED contacts ("multiple pips with one
-	// player").  Sort by Mover derivation: vehicles into the moving grid (red
-	// pips), everything else into the static grid (the dim silhouette layer
-	// DrawStatic draws) -- the follow-up the old note deferred.
+	//
+	// STATIC GRID SPLIT (2026-08-13, the missing-radar-map-geometry fix): the
+	// per-frame rebuild used to Clear() + refill staticEntities from the SAME
+	// dynamic iterators -- which structurally excluded the map's STATIC-flagged
+	// UnscalableTerrain placements (528 of the 1071 outlined map records; on the
+	// arena maps essentially every wall/building), so MapDisplay::DrawStatic had
+	// nothing to draw and the radar showed no map.  staticEntities is now
+	// PERSISTENT: filled ONCE per mission below (every UnscalableTerrain-derived
+	// entity carrying a rtype-18 GaugeImage -- static AND dynamic, so the
+	// CulturalIcon props the 2026-07-12 phantom-red-pip fix routed here still
+	// arrive), pruned by NotifyOfBecomingUninterestingEntity, reset at
+	// LinkToEntity.  The per-frame loops below rebuild only the MOVING grid.
 	{
 		HostManager::DynamicMasterEntityIterator master_iterator(host_manager);
 		master_iterator.First();
@@ -3655,8 +3667,6 @@ void
 				if (st != 2 && st != 9)
 					movingEntities.Add(entity);
 			}
-			else
-				staticEntities.Add(entity);
 		}
 	}
 	{
@@ -3671,10 +3681,43 @@ void
 				if (st != 2 && st != 9)
 					movingEntities.Add(entity);
 			}
-			else
-				staticEntities.Add(entity);
 		}
 	}
+
+	//
+	// THE ONE-TIME STATIC FILL.  Authoritative regardless of the interest
+	// feed's health: walk EVERY entity once per mission and keep the
+	// UnscalableTerrain-derived ones that carry a gauge representation (the
+	// rtype-18 GaugeImage in their model list -- the same records
+	// docs/MAPS.html renders).  The class gate is UnscalableTerrain, NOT
+	// Terrain: the shipped content has ZERO Terrain records -- its map
+	// geometry is 1008x UnscalableTerrain + 789x CulturalIcon (a subclass),
+	// and our headers derive UnscalableTerrain from Entity, so the old
+	// Terrain gate matched nothing (see the btl4grnd.cpp note on @0x4e6ef8).
+	// Clear() first so any pre-fill interest-feed adds can't duplicate.
+	//
+	if (!staticEntitiesFilled)
+	{
+		staticEntities.Clear();
+		HostManager::AllEntityIterator all_iterator(host_manager);
+		Entity *entity;
+		int kept = 0;
+		while ((entity = all_iterator.ReadAndNext()) != NULL)
+		{
+			if (!entity->IsDerivedFrom(*UnscalableTerrain::GetClassDerivations()))
+				continue;
+			if (application->GetResourceFile()->SearchList(
+					entity->GetResourceID(),
+					ResourceDescription::GaugeImageStreamResourceType) == NULL)
+				continue;
+			staticEntities.Add(entity);
+			++kept;
+		}
+		staticEntitiesFilled = True;
+		if (getenv("BT_RADAR_LOG"))
+			DEBUG_STREAM << "[radar] static grid filled: " << kept
+				<< " map entities with gauge outlines\n" << std::flush;
+	}
 	Check_Fpu();
 }
 

engine/MUNGA/GAUGREND.h

@@ -673,6 +673,11 @@ protected:
 	GraphicsPort *graphicsPort[maximumGraphicsPorts];
 	GaugeEntityList movingEntities;
 	GaugeEntityArray staticEntities;
+	// RADAR MAP GEOMETRY (2026-08-13): staticEntities is PERSISTENT, filled
+	// ONCE per mission by RebuildEntityGrid's authoritative walk (and pruned by
+	// NotifyOfBecomingUninterestingEntity).  Reset at LinkToEntity so a pod
+	// process that hosts many missions refills per round.
+	Logical staticEntitiesFilled;
 	LampManager *lampManager;
 	GaugeAlarmManager *gaugeAlarmManager;
 

game/reconstructed/btl4grnd.cpp

@@ -362,7 +362,21 @@ void
 		{
 			movingEntities.Add(entity);			// FUN_004434f4, this+0x94
 		}
-		else if (entity->IsDerivedFrom(*Terrain::GetClassDerivations()))	// 0x4e6ef8
+		//
+		// GATE CORRECTED 2026-08-13 (the missing-radar-map-geometry fix): this
+		// was transcribed as Terrain::GetClassDerivations() -- but the shipped
+		// content has ZERO Terrain records (census: 1008x UnscalableTerrain +
+		// 789x CulturalIcon, both deriving from Entity in our headers), so the
+		// Terrain predicate was dead code and rejected 100% of map geometry.
+		// The binary's @0x4e6ef8 must have been UnscalableTerrain's derivation
+		// (or the shipped-machine MUNGA derived UnscalableTerrain from
+		// Terrain).  [T3 on which; the corrected gate matches the content.]
+		// The add is guarded on the one-time fill (GAUGREND RebuildEntityGrid)
+		// not having run -- post-fill notifications would double-add, and the
+		// fill's Clear()+walk supersedes any pre-fill adds.
+		//
+		else if (!staticEntitiesFilled
+			&& entity->IsDerivedFrom(*UnscalableTerrain::GetClassDerivations()))
 		{
 			staticEntities.Add(entity);			// FUN_00443864, this+0xb0
 		}
@@ -409,7 +423,10 @@ void
 		{
 			movingEntities.Remove(entity);		// FUN_00443510, this+0x94
 		}
-		else if (entity->IsDerivedFrom(*Terrain::GetClassDerivations()))	// 0x4e6ef8
+		// Gate corrected 2026-08-13 to match the ADD side (see the note there):
+		// UnscalableTerrain, not Terrain.  Post-fill this is the prune path for
+		// a destroyed/expiring static -- it leaves the persistent radar grid.
+		else if (entity->IsDerivedFrom(*UnscalableTerrain::GetClassDerivations()))
 		{
 			staticEntities.Remove(entity);		// FUN_00443930, this+0xb0
 		}