Pick a normalization divisor for widening Uint8 / Uint16 source data
to Float32 while preserving the GPU-shader-visible [0, 1] range that
the interleaved era's per-attribute normalized: true flag produced.
Shared by the pool adapter and the non-pool factory so both paths
widen identically. See widen-to-float32.ts for context.
Pick a normalization divisor for widening Uint8 / Uint16 source data to Float32 while preserving the GPU-shader-visible [0, 1] range that the interleaved era's per-attribute
normalized: trueflag produced. Shared by the pool adapter and the non-pool factory so both paths widen identically. Seewiden-to-float32.tsfor context.