Struct MeshGeometryKey 

pub(crate) struct MeshGeometryKey {
    positions_hash: u64,
    indices_hash: u64,
    normals_hash: u64,
}

Content-hash fallback used by BOTH writers: collate_rotation_aware_placements runs first, this catches what it did not place. Two meshes with bit-identical (origin-relative) positions, indices AND normals collapse onto one shape.

Normals are keyed because the flat layout emits the shared shape’s normals for every occurrence; /optimized ships none, so the stricter key can only split a group whose normals differ, which the pipeline never produces (normals derive from positions/indices) — no /optimized behaviour change.

Fields

positions_hash: u64

Hash of the quantized positions.

indices_hash: u64

Hash of the indices.

normals_hash: u64

Hash of the normals.

Trait Implementations

impl Clone for MeshGeometryKey

fn clone(&self) -> MeshGeometryKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Hash for MeshGeometryKey

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MeshGeometryKey

fn eq(&self, other: &MeshGeometryKey) -> 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 Copy for MeshGeometryKey

impl Eq for MeshGeometryKey

impl StructuralPartialEq for MeshGeometryKey