ue-mass-entity

Mass Entity enables massive crowd simulations in Unreal Engine by using an archetype-based ECS with cache-friendly data layouts and parallel processing to maintain performance across tens of thousands of entities. It supports ISM rendering to minimize performance costs.

Archetype-based ECS data modeling composes per-entity fragments, tags, shared fragments, and chunk data to maximize memory locality for large-scale simulations. This cache-friendly layout allows efficient batch creation and query-driven iteration over massive entity sets.

To set up a basic Mass Entity processor, spawn a small entity setup using a config asset and a spawner, then implement a processor using FMassEntityQuery to filter and mutate the target subset of entities. You can apply changes via deferred commands during iteration to maintain memory safety.

Yes, Mass Entity supports MassCrowd integration with ZoneGraph to handle lane navigation and density management for crowds. This allows complex entity setups to leverage ZoneGraph-based density controls within Unreal Engine projects.

Mass Entity supports ISM-based rendering and LOD transitions to render mass scenes with minimal performance cost. You can configure instanced rendering to efficiently display tens of thousands of entities simultaneously in Unreal Engine.

Deferred mutations apply changes via deferred commands during query-driven iteration to maintain memory safety and performance. This prevents data corruption when filtering and mutating large entity sets in parallel within the archetype-based ECS processing model.