pub fn band_contour(contour: f32) -> f32Expand description
The contour depth the fragment sites are handed: clamped to [0, 1], with a
non-finite binding falling back to none.
The contour itself has no CPU definition to be canonical — it is drawn from
fwidth, which exists only in a fragment shader — so the WGSL is the
implementation and its two copies are what the drift test compares. This is the
part of it that can live on the CPU.