Enum AnisoSeedMode 

pub enum AnisoSeedMode {
    AutoSeedFromGeometry,
    Literal,
}

How the Matérn forward design build interprets an exactly all-zero aniso_log_scales vector.

Variants

AutoSeedFromGeometry

All-zero η is the κ-optimizer / scale_dims seeding sentinel: replace it with geometry-derived contrasts from the knot cloud ([auto_seed_aniso_contrasts]). This is the default for every internal build entry; the optimizer’s analytic ψ-gradient is computed against the same auto-seeded design, so value/gradient stay consistent. Note that by the time the κ-optimizer rebuilds a frozen design the center strategy has usually been resolved to UserProvided, so center provenance cannot be used to distinguish this from a genuine literal request — the mode must be carried explicitly.

Literal

All-zero η is an explicit isotropic request and is honored literally ([centered_aniso_contrasts]): the design reduces to the closed-form isotropic Matérn and varies continuously through η = 0. The public matern_basis FFI (and its input-location jet/Hessian) selects this so a caller’s explicit isotropic request is not hijacked into a data-driven anisotropic kernel (#1042).

Trait Implementations

impl Clone for AnisoSeedMode

fn clone(&self) -> AnisoSeedMode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for AnisoSeedMode

impl Debug for AnisoSeedMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for AnisoSeedMode

impl PartialEq for AnisoSeedMode

fn eq(&self, other: &AnisoSeedMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for AnisoSeedMode