Octree removal 4: replace the remaining tree readers (rect-select, level-3 probes, particle pick)

sky_line commented

2026-10-06 09:30:24 +00:00

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Part of #474. From the 2026-10-06 audit: the octrees are still built and maintained every frame, but almost nothing reads them. Rendering, culling, world picking, LOD, texture priority and lights all run on our own systems.

Replace:

Rect-select: use an AABB-vs-frustum query on the clean instance store instead of LLSpatialPartition::cull / LLOctreeSelect.
Level-3 automatic reflection probes (llappviewer.cpp ~6218-6290): place them from a 16 m grid over clean-instance AABBs, or the instance store's spatial bins (vk_parity_audit.md ~342), instead of walking PARTITION_VOLUME octree nodes.
Particle-owner pick: see the separate bug. Replace it with a GPU or clean-store pick.

After this: Volume, Bridge and every LLSpatialBridge can go, along with processPartitionQ / mPartitionQ / mMovedBridge, markPartitionMove, and the movePartition call in genBBoxes (llvovolume.cpp ~1913).

Part of #474. From the 2026-10-06 audit: the octrees are still built and maintained every frame, but almost nothing reads them. Rendering, culling, world picking, LOD, texture priority and lights all run on our own systems. **Replace:** - **Rect-select:** use an AABB-vs-frustum query on the clean instance store instead of `LLSpatialPartition::cull` / `LLOctreeSelect`. - **Level-3 automatic reflection probes** (llappviewer.cpp ~6218-6290): place them from a 16 m grid over clean-instance AABBs, or the instance store's spatial bins (vk_parity_audit.md ~342), instead of walking `PARTITION_VOLUME` octree nodes. - **Particle-owner pick:** see the separate bug. Replace it with a GPU or clean-store pick. **After this:** Volume, Bridge and every `LLSpatialBridge` can go, along with `processPartitionQ` / `mPartitionQ` / `mMovedBridge`, `markPartitionMove`, and the `movePartition` call in `genBBoxes` (llvovolume.cpp ~1913).

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2026-10-06 09:30:24 +00:00

Epic: remove the scene octree / spatial partitions (built every frame, almost nothing reads them) #474

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2026-10-06 09:30:24 +00:00

Hovering or clicking a particle never finds its owner object (particle pick broken under GPU particles) #481

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2026-10-06 15:04:14 +00:00

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2026-10-06 20:15:41 +00:00

Box select: test prims in screen space with the renderer's camera, not LL's GL pick frustum

sky_line commented

2026-10-07 00:39:39 +00:00

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Update (2026-10-06): rect-select no longer reads the octree. Box select was rewritten for #475 and the box-select bugs (commits e479911025 and ebe1f666e3, in 1.1.0 Beta 8). It projects candidate prims from gObjectList with the live camera: bounding-box corners first, then vertices for prims that straddle the box. So only level-3 probe placement and the particle-owner pick (#481) remain as tree readers here.

Update (2026-10-06): **rect-select no longer reads the octree.** Box select was rewritten for #475 and the box-select bugs (commits e479911025 and ebe1f666e3, in 1.1.0 Beta 8). It projects candidate prims from `gObjectList` with the live camera: bounding-box corners first, then vertices for prims that straddle the box. So only **level-3 probe placement** and the **particle-owner pick (#481)** remain as tree readers here.

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2026-10-07 00:48:42 +00:00

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