feat: add Cesium semantic inspection mode

scripts/build-area.js

@@ -324,6 +324,7 @@ function exportCesium(area) {
     "--metadata",
     area.outputs.metadata,
   ], "cesium");
+  const semanticAssets = semanticAssetRecords(area);
   writeCesiumPreview(area);
   const finished = Date.now();
   const digest = glbDigest(area.outputs.glb);
@@ -340,6 +341,7 @@ function exportCesium(area) {
     outputs: {
       glb: fileRecord(area.outputs.glb),
       metadata: fileRecord(area.outputs.metadata),
+      semanticAssets,
     },
     summary: {
       glb: glbSummary(digest),
@@ -349,6 +351,19 @@ function exportCesium(area) {
   });
 }
 
+function semanticAssetRecords(area) {
+  const metadata = JSON.parse(fs.readFileSync(area.outputs.metadata, "utf8"));
+  const assets = Array.isArray(metadata.assets) ? metadata.assets : [];
+  const records = {};
+  for (const asset of assets) {
+    if (asset.category !== "semantic") continue;
+    const file = path.join(area.outputs.areaDir, asset.url);
+    ensureFile(file, `Cesium semantic asset '${asset.id}'`);
+    records[asset.id] = fileRecord(file);
+  }
+  return records;
+}
+
 function compressCesiumGlb(area) {
   ensureFile(area.outputs.glb, "Cesium GLB");
   ensureFile(area.outputs.metadata, "Cesium metadata");