fn sample_set(
fixed: &Volume<'_>,
mask: Option<&[u8]>,
max_samples: usize,
) -> Vec<Sample>Expand description
Pick the fixed voxels the metric looks at: the smallest integer stride whose masked sample
count fits max_samples.
Striding rather than blurring is deliberate at the finest level — it keeps full spatial detail at a bounded cost. Coarse levels are already blurred and decimated, which is where the smooth cost landscape comes from.