ECS Entities

ECS Entities

Entities are represented as:

const entityId = {
  index: 0,
  generation: 0
}

Allocation Model

EntityManager uses:

• generations[]
• alive[]
• freeIndices[]

Destroyed indices are reused, generation increments on destroy.

Safety Model

isAlive(entity) validates both index and generation.

Stale entity handles fail safely.

Iteration

iterAlive() yields only living entity IDs.

Notes

• aliveCount tracks current live entities.
• Reuse behavior is covered by tests for generation bump correctness.