wave5-stateful-physics-event-buffers

What problem does it solve?

This Skill helps you detect Enter, Stay, and Exit semantics for Unity Physics trigger and collision events without manually tracking overlap history across fixed simulation ticks.

Core Features & Use Cases

• Stateful trigger tracking: Uses DynamicBuffer<StatefulTriggerEvent> to reliably count or react to overlap lifecycles (Enter/Exit) and optionally handle per-frame persistence (Stay).
• Stateful collision tracking: Applies the same pattern to collision event lifecycles via Unity Physics stateful collision event buffers.
• Correct ECS scheduling: Guides the required fixed-step system ordering so you read buffers after the corresponding buffer system runs.

Use when you need gameplay logic like portal/pickup activation, damage zone lifecycle handling, landing detection, or impact response that must distinguish first contact from ongoing contact and final contact.

Quick Start

Add StatefulTriggerEventBufferAuthoring to your trigger-zone entities, ensure your system runs in FixedStepSimulationSystemGroup and is ordered after StatefulTriggerEventBufferSystem, then iterate DynamicBuffer<StatefulTriggerEvent> in a Burst job and branch on StatefulEventState.Enter and StatefulEventState.Exit.