Engine API

Phase order

Systems run once per fixed tick in this exact order:

#	Phase	Constant	Description
1	`input`	`PHASE.INPUT`	Sample input devices (keyboard, mouse, gamepad) at the top of the frame.
2	`prePhysics`	`PHASE.PRE_PHYSICS`	Apply forces/intents to rigid bodies before the physics step.
3	`physics`	`PHASE.PHYSICS`	Step the Rapier physics world (fixed timestep).
4	`postPhysics`	`PHASE.POST_PHYSICS`	Read physics results back; sync transforms from bodies to Object3D.
5	`gameLogic`	`PHASE.GAME_LOGIC`	General gameplay behavior.
6	`animation`	`PHASE.ANIMATION`	Advance animation graphs / mixers.
7	`preRender`	`PHASE.PRE_RENDER`	Final per-frame fixups (cameras, HUD state) before drawing.
8	`render`	`PHASE.RENDER`	Draw the frame.