Struct PlanarAssignment 

pub struct PlanarAssignment {
    pub slots: Vec<Option<usize>>,
    pub representatives: Vec<[f32; 4]>,
}

The result of grouping a list of reflection planes into a bounded number of distinct slots: slots[i] is the slot a plane maps to (None when the budget is exhausted by earlier distinct planes, i.e. it falls back to the probe cube), and representatives is the deduplicated plane per slot (representatives.len() is the number of mirror renders the frame needs).

Fields

slots: Vec<Option<usize>>

Per-reflector plane slot, None when the reflector fell back to a probe.

representatives: Vec<[f32; 4]>

One representative plane per assigned slot.