pub fn lambda1024(p: &ImplicitPoint) -> Option<Lam>Expand description
The I512 homogeneous lambda of an implicit point (the value cached per Vid).
Computed at the coarse (2^16) scale; a point whose defining coords are on the
FINE welded-seam grid (k/2^36) is recomputed at the fine scale and its
denominator absorbs the 2^20 scale ratio — real·2^16 = λ_fine/(d_fine·2^20)
— so every cached lambda lives in ONE homogeneous convention and any two are
directly comparable in the Vid predicates below.