Squared distance optimizations across 30 files:
- Convert glm::length() comparisons to glm::dot() (no sqrt)
- Use glm::inversesqrt() for check-then-normalize patterns (1 rsqrt vs 2 sqrt)
- Defer sqrt to after early-out checks in collision/movement code
- Hottest paths: camera_controller (21), weather particles, WMO collision,
transport movement, creature interpolation, nameplate culling
Container and algorithm improvements:
- std::map<string> → std::unordered_map for asset/DBC/MPQ/warden caches
- std::mutex → std::shared_mutex for asset_manager and mpq_manager caches
- std::sort → std::partial_sort in lighting_manager (top-2 of N volumes)
- Double-lookup find()+operator[] → insert_or_assign in game_handler
- Add reserve() for per-frame vectors: weather, swim_effects, WMO/M2 collision
Threading and synchronization:
- Replace 1ms busy-wait polling with condition_variable in character_renderer
- Move timestamp capture before mutex in logger
- Use memory_order_acquire/release for normal map completion signaling
API additions:
- DBC getStringView()/getStringViewByOffset() for zero-copy string access
- Parse creature display IDs from SMSG_CREATURE_QUERY_SINGLE_RESPONSE
Two bugs in loadPatchArchives():
1. isLetterPatch detection was inverted (rfind != 0 is false for all
"patch-*" entries), making the disable flags non-functional
2. Patch file lookup used exact std::filesystem::exists() which is
case-sensitive on Linux — Patch-A.MPQ wouldn't match patch-a.mpq
Now scans the data directory once and builds a case-insensitive lookup
map, so any case variant (Patch-A.MPQ, patch-a.mpq, PATCH-A.MPQ) is
found correctly.
Loads speech-enUS.MPQ, expansion-speech-enUS.MPQ, and lichking-speech-enUS.MPQ
which contain NPC voice/creature sound files. These MPQs were present but not
being loaded, causing all .ogg NPC greeting sounds to show as NOT FOUND.
