const CLUSTER_FLOOR: (f32, f32, f32);Expand description
The debug floor: how wide and how deep, and where its front edge sits.
It is far larger than the camera can see, so the frame is floor from edge to edge: the camera looks down at more than half the vertical field of view, and a floor that ended inside the frame would put a horizon across it and hide the slices furthest away – exactly the ones a log-spaced grid packs together.