Struct InstanceMeshRef 

pub struct InstanceMeshRef<'a> {
    pub positions: &'a [f32],
    pub normals: &'a [f32],
    pub indices: &'a [u32],
    pub origin: [f64; 3],
    pub instance_meta: Option<&'a InstanceMeta>,
    pub entity_id: u32,
    pub color: [f32; 4],
    pub item_id: Option<u32>,
}

A borrowed view of a mesh for collation/encoding — lets callers feed geometry from any owner (geometry’s Mesh, processing’s MeshData) WITHOUT cloning the vertex data (cloning 219k meshes’ geometry risks the build-container OOM).

Fields

positions: &'a [f32]

normals: &'a [f32]

indices: &'a [u32]

origin: [f64; 3]

instance_meta: Option<&'a InstanceMeta>

entity_id: u32

Per-occurrence entity id (used only by the encoder).

color: [f32; 4]

Per-occurrence RGBA (used only by the encoder).

item_id: Option<u32>

The IfcRepresentationItem this occurrence’s geometry was tessellated from (MeshData::geometry_item_id) — the host’s drill-to-source link, used only by the encoder. Option like every other link in the chain (RawInstanceOccurrence, InstanceRecord, DecodedInstance::item_id), so no caller can pass a meaningful-looking 0; the encoder collapses None to the wire’s 0 once, where that sentinel is a wire fact.

Implementations

impl<'a> InstanceMeshRef<'a>

pub fn from_mesh(m: &'a Mesh) -> Self

Build a view over a geometry Mesh (encoder id/colour default to 0).