Camera
constCamera:BuiltinComponentDef<CameraData>
Defined in: ecs/component.ts:925
What a viewport draws and from where. One camera per render target;
priority breaks the tie and isActive takes one out.
@beta: clearFlags is a bitmask whose C++ enum has no TypeScript spelling,
and cullingMask names layers no exported constant identifies — so two of
these fields are typed number for want of the vocabulary, not by design.