LowLevel

Low-level infrastructure utilities that operate beneath Unity's standard MonoBehaviour lifecycle. These classes provide compiler polyfills and direct access to Unity's Player Loop for injecting custom update phases.

Architecture

Injection Flow

Classes

Class	Description
IsExternalInit	Compiler polyfill enabling C# 9 init accessors in Unity's .NET Standard 2.1
PlayerLoopInjector	Static utility for injecting custom PlayerLoopSystem entries into Unity's Player Loop

Enums

Enum	Description
UnityPlayerLoopType	Friendly names for Unity's 8 top-level Player Loop phases
PlayerLoopInjector.InjectionOrder	Whether to prepend or append to the target phase's subsystem list

Key Concepts

Player Loop Injection

Unity's Player Loop defines the order of all per-frame operations (input, physics, rendering, etc.). PlayerLoopInjector allows inserting custom PlayerLoopSystem entries at the beginning or end of any phase — enabling frame-precise update timing without MonoBehaviour overhead.

All injected loops are automatically removed on application quit to prevent stale references.

Compiler Polyfill

IsExternalInit is a zero-cost polyfill that enables the C# 9 init keyword in projects targeting .NET Standard 2.1 (Unity's default). It has no runtime behavior.