Class NodeFactory

Wire up the picking system. When set, all subsequent node creations will also create shadow pick-scene nodes.

Invalidate the cached pick buffer (call after geometry updates). Also invalidates the picking system's world-AABB cache, since geometry changes can move the bounding box. (Camera-only motion does NOT need to invalidate boxes and reaches markDirty() via the controls 'change' event, not this method.)

Retroactively register already-loaded scene nodes with the picking system.

This — not the per-node factory — is the path production actually takes. The scene loads before picking is wired up (initPicking traverses the finished scene to decide whether any node declares labels, and only then constructs the PickingSystem and calls setPickingSystem), so at node-creation time this.pickingSystem is still null on a first load. A geometry type wired into createEmptyXNode but missing HERE is unpickable in every real scene, and appears to work only on a SECOND dataset load. Hence the table above rather than an else if chain: adding a geometry type is a compile error at one place instead of a branch someone forgets.

Rebuild picking-system registrations after a WebGL context-restore event. The pick materials in pickingSystem.nodeMap were compiled against the now-dead WebGL context, so we drop the registrations (without disposing — see PickingSystem.clearRegistrationsForRebuild) and re-create them via registerExistingSceneNodes, which produces fresh pick materials against the new context.

Mirror of MaterialManager.rebuildAfterContextRestore — both are called from SceneManager.contextRestoredHandler in the order post-processing → materials → nodes.

Also re-uploads geometry GPU buffers for every POOLED geometry type. A context loss zeroes the GPU-side storage — the element textures + aSortedIndex (gsplats, points, and lines alike since the lines texture-storage migration) — while the CPU mirror survives, so we mark everything full-dirty (empty ranges → three's full upload) and clear the append-fast-path flag gpuPrefixIntact (depth-sorting Phase 4 Stage 2). The flag is load-bearing: without it the next commit could take the append path and DOWNGRADE the pending full upload to a suffix-only partial, leaving the prefix stale. This runs unconditionally (picking may be disabled).

Create a THREE.Mesh (instanced points) placeholder with an empty geometry.

Create a THREE.Mesh (instanced lines) placeholder with empty instance buffers.

Create a THREE.Mesh (instanced gsplats) placeholder with empty instance buffers.

Create an empty placeholder for a mesh node — a plain THREE.Mesh with an indexed BufferGeometry, not an instanced quad.

attrs is the COMPOSED effective attrs and leafAttrs the node's RAW ones — the same two-bag arrangement the three siblings use, needed for exactly one decision: telling a leaf-authored colormap window from an inherited ancestor gain (resolveColormapWindow). The order is reversed from the siblings' because the raw bag is optional here, and it defaults to attrs, which is right whenever no ancestor authored a gain.

Registers a pick node like the three siblings do, with its own pick material pair: mesh picking keys on gl_VertexID rather than an element-texture texel (spec §6.5), so it could not reuse theirs.

Validate points data for edge cases and malformed data. Logs detailed diagnostics to browser console for debugging.