CameraSyncSystem

Syncs CameraComponent authoring values to the live THREE.js camera object each frame, handling both perspective and orthographic projection modes.

Overview

CameraSyncSystem runs every frame and is responsible for:

Updating fov, near, far, and zoom on THREE.PerspectiveCamera from the component values.
Updating left, right, top, bottom, near, far, and zoom on THREE.OrthographicCamera.
Clamping all values to safe ranges (near ≥ 0.001, far > near, fov in [1, 179], zoom ≥ 0.001) so an invalid inspector value never breaks the camera projection matrix.
Normalizing orthographic bounds so that right > left and top > bottom are always satisfied.
Calling updateProjectionMatrix() whenever a change is detected.

Component	Access
`CameraComponent`	Read + sanitize (clamps written back to component fields)
`Object3DRef`	Read (the live THREE.js camera object)

Projection type — the system checks the concrete type of the object in Object3DRef (instanceof THREE.PerspectiveCamera / THREE.OrthographicCamera) and applies the matching update path. If neither type matches, the entity is skipped.
Aspect ratio — perspective cameras auto-update aspect from window.innerWidth / window.innerHeight each frame when a window is available.
Change detection — property values are compared before writing to avoid redundant updateProjectionMatrix() calls on every frame.