fix: handle skip connection missing lods

seung-lab · Nov 8, 2023 · 735cac2 · 735cac2
1 parent d6dc9b3
commit 735cac2
Show file tree

Hide file tree

Showing 2 changed files with 10 additions and 5 deletions.
diff --git a/src/neuroglancer/datasource/graphene/backend.ts b/src/neuroglancer/datasource/graphene/backend.ts
@@ -150,6 +150,10 @@ function decodeMultiscaleManifestChunk(chunk: GrapheneMultiscaleManifestChunk, r
     clipUpperBound: vec3.clone(response.clipUpperBound),
   }
   chunk.fragmentIds = response.fragments;
+  chunk.manifest.clipLowerBound.fill(0);
+  chunk.manifest.clipUpperBound.fill(100000);
+  chunk.manifest.octree[5*(response.fragments.length-1) + 4] &= 0x7FFFFFFF;
+  chunk.manifest.octree[5*(response.fragments.length-1) + 3] |= 0x80000000;
 }
 
 async function decodeMultiscaleFragmentChunk(

diff --git a/src/neuroglancer/mesh/multiscale.ts b/src/neuroglancer/mesh/multiscale.ts
@@ -153,12 +153,13 @@ export function getDesiredMultiscaleMeshChunks(
 
       if (priorLodScale === 0 || pixelSize * detailCutoff < priorLodScale) {
         let lodScale = lodScales[lod];
-        if ((childBeginAndVirtual & (1 << 31)) !== 0) {
-          lodScale = 0;
-        }
-
         if (lodScale !== 0) {
-          callback(lod, row, lodScale / pixelSize, (childEndAndEmpty >>> 31));
+          const virtual = (childBeginAndVirtual >>> 31);
+          if (virtual) {
+            lodScale = 0;
+          }
+          const empty = (childEndAndEmpty >>> 31);
+          callback(lod, row, lodScale / pixelSize, empty | virtual);
         }
 
         if (lod > 0 && (lodScale === 0 || pixelSize * detailCutoff < lodScale)) {