Add relations management to GroundTruthData and update Worker components

- Introduced new properties and methods in GroundTruthData for handling relations, including `needsRelationsUpload`, `relationsDenseBySmallId`, and `pendingRelationsPairs`.
- Implemented logic to mark relations as dirty and upload relations conditionally based on changes in diplomacy.
- Updated Worker.worker.ts to synchronize relations updates with the renderer, optimizing performance by only refreshing when necessary.
- Enhanced WorkerTerritoryRenderer with methods to mark relations dirty, ensuring proper resource management during updates.

src/client/graphics/webgpu/core/GroundTruthData.ts

@@ -113,6 +113,10 @@ export class GroundTruthData {
   private paletteMaxSmallId = 0;
   private ownerIndexWidth = 1;
   private relationsSize = 1;
+  private needsRelationsUpload = true;
+  private relationsDenseBySmallId: Uint32Array | null = null;
+  private pendingRelationsPairs: Set<bigint> = new Set();
+  private readonly relationWriteScratch = new Uint8Array(256);
 
   private constructor(
     private readonly device: GPUDevice,
@@ -720,6 +724,8 @@ export class GroundTruthData {
     }
     this.needsPaletteUpload = false;
 
+    const prevMaxSmallId = this.paletteMaxSmallId;
+
     let maxSmallId = 0;
     let nextPaletteWidth = 0;
     let row0: Uint8Array | null = null;
@@ -780,6 +786,10 @@ export class GroundTruthData {
     }
 
     this.paletteMaxSmallId = maxSmallId;
+    if (this.paletteMaxSmallId !== prevMaxSmallId) {
+      // Relations/owner-index textures depend on maxSmallId.
+      this.needsRelationsUpload = true;
+    }
 
     let textureRecreated = false;
     if (nextPaletteWidth !== this.paletteWidth) {
@@ -819,6 +829,16 @@ export class GroundTruthData {
   }
 
   uploadRelations(): boolean {
+    if (!this.needsRelationsUpload && this.pendingRelationsPairs.size > 0) {
+      return this.uploadRelationsPartial();
+    }
+    if (!this.needsRelationsUpload) {
+      return false;
+    }
+
+    this.needsRelationsUpload = false;
+    this.pendingRelationsPairs.clear();
+
     const players = this.game
       .playerViews()
       .filter((p) => p.smallID() > 0)
@@ -852,6 +872,7 @@ export class GroundTruthData {
       dense++;
       denseBySmallId[id] = dense;
     }
+    this.relationsDenseBySmallId = denseBySmallId;
 
     const ownerIndexBytesPerRow = align(this.ownerIndexWidth * 4, 256);
     const ownerIndexPaddedU32 = new Uint32Array(ownerIndexBytesPerRow / 4);
@@ -916,6 +937,69 @@ export class GroundTruthData {
     return textureRecreated;
   }
 
+  private uploadRelationsPartial(): boolean {
+    if (!this.relationsDenseBySmallId || !this.relationsTexture) {
+      // No stable mapping/texture yet: fall back to a full rebuild.
+      this.needsRelationsUpload = true;
+      this.pendingRelationsPairs.clear();
+      return false;
+    }
+
+    const denseBySmallId = this.relationsDenseBySmallId;
+    const size = this.relationsSize;
+    const scratch = this.relationWriteScratch;
+    const bytesPerRow = 256;
+
+    const writeTexel = (x: number, y: number, value: number) => {
+      if (x <= 0 || y <= 0 || x >= size || y >= size) {
+        return;
+      }
+      scratch.fill(0);
+      scratch[0] = value & 0xff;
+      this.device.queue.writeTexture(
+        { texture: this.relationsTexture, origin: { x, y } },
+        scratch,
+        { bytesPerRow, rowsPerImage: 1 },
+        { width: 1, height: 1, depthOrArrayLayers: 1 },
+      );
+    };
+
+    const computeCode = (aSmall: number, bSmall: number): number => {
+      if (aSmall === bSmall) return 0;
+      const aAny: any = (this.game as any).playerBySmallID?.(aSmall);
+      const bAny: any = (this.game as any).playerBySmallID?.(bSmall);
+      if (!aAny || !bAny || !aAny.isPlayer?.() || !bAny.isPlayer?.()) {
+        return 0;
+      }
+      if (aAny.hasEmbargo?.(bAny)) {
+        return 2;
+      }
+      if (aAny.isFriendly?.(bAny) || bAny.isFriendly?.(aAny)) {
+        return 1;
+      }
+      return 0;
+    };
+
+    for (const key of this.pendingRelationsPairs) {
+      const aSmall = Number(key >> 32n);
+      const bSmall = Number(key & 0xffffffffn);
+      const aDense = denseBySmallId[aSmall] ?? 0;
+      const bDense = denseBySmallId[bSmall] ?? 0;
+      if (aDense === 0 || bDense === 0) {
+        continue;
+      }
+
+      const code = computeCode(aSmall, bSmall);
+      writeTexel(aDense, bDense, code);
+      if (aDense !== bDense) {
+        writeTexel(bDense, aDense, code);
+      }
+    }
+
+    this.pendingRelationsPairs.clear();
+    return false;
+  }
+
   uploadDefensePosts(): void {
     if (!this.needsDefensePostsUpload) {
       return;
@@ -1287,6 +1371,26 @@ export class GroundTruthData {
     this.needsPaletteUpload = true;
   }
 
+  markRelationsDirty(): void {
+    this.needsRelationsUpload = true;
+    this.pendingRelationsPairs.clear();
+  }
+
+  markRelationsPairDirty(aSmallId: number, bSmallId: number): void {
+    if (aSmallId <= 0 || bSmallId <= 0) {
+      return;
+    }
+    if (!this.relationsDenseBySmallId) {
+      // No mapping yet: ensure a full rebuild occurs.
+      this.needsRelationsUpload = true;
+      return;
+    }
+    const a = Math.min(aSmallId, bSmallId);
+    const b = Math.max(aSmallId, bSmallId);
+    const key = (BigInt(a) << 32n) | BigInt(b);
+    this.pendingRelationsPairs.add(key);
+  }
+
   setPaletteOverride(
     paletteWidth: number,
     maxSmallId: number,

src/core/worker/Worker.worker.ts

@@ -4,7 +4,15 @@ import { PastelTheme } from "../configuration/PastelTheme";
 import { PastelThemeDark } from "../configuration/PastelThemeDark";
 import { FetchGameMapLoader } from "../game/FetchGameMapLoader";
 import { PlayerID } from "../game/Game";
-import { ErrorUpdate, GameUpdateViewData } from "../game/GameUpdates";
+import {
+  AllianceExpiredUpdate,
+  AllianceRequestReplyUpdate,
+  BrokeAllianceUpdate,
+  EmbargoUpdate,
+  ErrorUpdate,
+  GameUpdateType,
+  GameUpdateViewData,
+} from "../game/GameUpdates";
 import { loadTerrainMap, TerrainMapData } from "../game/TerrainMapLoader";
 import { createGameRunner, GameRunner } from "../GameRunner";
 import { ClientID, GameStartInfo, PlayerCosmetics } from "../Schemas";
@@ -40,22 +48,75 @@ function gameUpdate(gu: GameUpdateViewData | ErrorUpdate) {
     return;
   }
 
+  // Keep renderer-side adapter in sync (palette/relations/etc).
+  (renderer as any)?.updateGameView?.(gu);
+
+  // Uploading relations is expensive; only refresh when diplomacy changes,
+  // and only for the affected player pairs.
+  const updates = gu.updates;
+  let relationsChanged = false;
+  if (renderer) {
+    const markPair = (aSmallId: number, bSmallId: number) => {
+      const r: any = renderer as any;
+      if (r?.markRelationsPairDirty) {
+        r.markRelationsPairDirty(aSmallId, bSmallId);
+        relationsChanged = true;
+      } else if (r?.markRelationsDirty) {
+        // Fallback for older/other renderers.
+        r.markRelationsDirty();
+        relationsChanged = true;
+      }
+    };
+
+    for (const e of updates[GameUpdateType.EmbargoEvent] as EmbargoUpdate[]) {
+      markPair(e.playerID, e.embargoedID);
+    }
+    for (const e of updates[
+      GameUpdateType.AllianceRequestReply
+    ] as AllianceRequestReplyUpdate[]) {
+      if (e.accepted) {
+        markPair(e.request.requestorID, e.request.recipientID);
+      }
+    }
+    for (const e of updates[
+      GameUpdateType.BrokeAlliance
+    ] as BrokeAllianceUpdate[]) {
+      markPair(e.traitorID, e.betrayedID);
+    }
+    for (const e of updates[
+      GameUpdateType.AllianceExpired
+    ] as AllianceExpiredUpdate[]) {
+      markPair(e.player1ID, e.player2ID);
+    }
+  }
+
   // Flush simulation-derived dirty tiles into the renderer before running
   // compute passes for this tick.
   if (renderer && dirtyTiles) {
+    let didWork = false;
+    if (relationsChanged) {
+      didWork = true;
+    }
     if (dirtyTilesOverflow) {
       dirtyTilesOverflow = false;
       dirtyTiles.clear();
       renderer.markAllDirty();
+      didWork = true;
     } else {
-      const tiles = dirtyTiles.drain(dirtyTiles.pendingCount());
-      for (const tile of tiles) {
-        renderer.markTile(tile);
+      const pending = dirtyTiles.pendingCount();
+      if (pending > 0) {
+        const tiles = dirtyTiles.drain(pending);
+        for (const tile of tiles) {
+          renderer.markTile(tile);
+        }
+        didWork = true;
       }
     }
 
     // Run compute passes at simulation tick cadence (not at render FPS).
-    renderer.tick();
+    if (didWork) {
+      renderer.tick();
+    }
   }
 
   sendMessage({

src/core/worker/WorkerTerritoryRenderer.ts

@@ -441,6 +441,14 @@ export class WorkerTerritoryRenderer {
     this.resources.markPaletteDirty();
   }
 
+  markRelationsDirty(): void {
+    this.resources?.markRelationsDirty();
+  }
+
+  markRelationsPairDirty(aSmallId: number, bSmallId: number): void {
+    this.resources?.markRelationsPairDirty(aSmallId, bSmallId);
+  }
+
   setPaletteFromBytes(
     paletteWidth: number,
     maxSmallId: number,