wave4-entity-index-in-query-scatter-pattern

What problem does it solve?

It solves the challenge of safely writing per-entity computed results into a shared NativeArray from a parallel Entities job without collisions or locks.

Core Features & Use Cases

• Stable per-entity indexing: Uses [EntityIndexInQuery] so each entity writes to its own pre-allocated array slot.
• Lock-free parallel scatter → downstream gather: Supports a two-phase workflow where scatter runs in parallel and a later phase consumes the results.
• Capacity correctness: Emphasizes sizing the array from query.CalculateEntityCount() to prevent out-of-bounds writes in Burst.

Use it when you have a parallel IJobEntity that must produce a result per entity for an inter-job pipeline (for example, computing and storing positions/derived data for a later job that reads them).

Quick Start

Use the [EntityIndexInQuery] index in a Burst-compiled IJobEntity to scatter into a NativeArray sized from query.CalculateEntityCount() for a downstream gather phase.