A system component responsible for parsing, optimising, and executing queries against a data store or knowledge base, including spatial queries in 3D environments. Query processors translate declarative query expressions into efficient execution plans, leveraging indexing structures such as octrees, k-d trees, R-trees, and scene graph hierarchies to minimise retrieval latency.
Semantic Classification
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QueryProcessor
QueryProcessor enables efficient searching and retrieval of spatially-organized data in Metaverse environments where traditional flat database queries prove insufficient for 3D hierarchical structures. These systems support spatial queries like range searches finding all objects within a spherical radius, nearest-neighbor searches locating closest interactive elements, ray-cast queries determining object intersection along sight lines, and volumetric queries selecting content within arbitrary 3D regions. Implementation leverages specialized data structures including octrees recursively subdividing 3D space into eight children, k-d trees optimizing nearest-neighbor searches, R-trees grouping spatially proximate objects for efficient range queries, and scene graph hierarchies with bounding volume hierarchies (BVH) enabling rapid culling. Advanced processors handle dynamic environments where objects move continuously, requiring incremental updates without full reconstruction. Query optimization techniques include spatial hashing for constant-time approximation, caching frequently-accessed results, predictive loading based on user trajectory, and level-of-detail systems returning simplified results for distant queries. Asset discovery systems extend spatial queries with semantic search, tag-based filtering, and content recommendation based on usage patterns and similarity metrics.
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https://www.khronos.org/opengl/wiki/Scene_Graph - OpenGL scene graph architecture patterns
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https://doc.cgal.org/latest/Spatial_searching/index.html - CGAL spatial searching algorithms
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https://postgis.net/ - PostGIS spatial database extension for PostgreSQL
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https://docs.unity3d.com/Manual/OcclusionCulling.html - Unity spatial culling and queries
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