wave5-parent-child-hierarchy-dynamic

What problem does it solve?

Runtime parent/child hierarchy changes in Unity DOTS can break transform propagation or corrupt buffer iteration when structural changes occur while iterating over DynamicBuffer<Child>.

Core Features & Use Cases

• Runtime attach/detach via ECB: Uses an Entity Command Buffer to reparent safely without invalidating iteration.
• Correct DynamicBuffer<Child> handling: Provides safe iteration patterns and batch operations to detach or adjust many children efficiently.
• Transform propagation correctness: Ensures required components (like LocalTransform) exist so hierarchy world-space results aren’t silently skipped.
• Use Case: Implement weapon pickup (mount/dismount child entities), vehicle mounting (reparent character parts), or runtime character part assembly (bulk attach/detach).

Quick Start

In your system, reparent children by iterating the parent’s DynamicBuffer<Child> and issuing detach/attach structural changes through an ECB, ensuring each attached child has a LocalTransform.