Struct SubMeshCollection 

pub struct SubMeshCollection {
    pub sub_meshes: Vec<SubMesh>,
    pub ids_are_materials: bool,
}

Collection of sub-meshes from an element, preserving per-item identity

Fields

sub_meshes: Vec<SubMesh>

ids_are_materials: bool

What SubMesh::geometry_id MEANS here: false (default) an IfcRepresentationItem, true an IfcMaterial (only layers.rs builds those). Uniform across the collection, which is why it lives on it.

Deliberately NOT geometry_class == GEOM_CLASS_LAYER_SLICE, which cannot answer it: that class is stamped from is_material_layer_sliceable, a static check made BEFORE the geometry runs, while try_layered_sub_meshes can still return None and fall through to the rep-item path — so rep-item ids can carry class 3 (#3199). SCOPE: it decides only which FIELD emit_sub_meshes emits the id under — five style lookups in element.rs still read geometry_id as a rep item on BOTH paths, safe only by express-id uniqueness (#3211).

Implementations

impl SubMeshCollection

pub fn new() -> Self

Create a new empty collection

pub fn of_materials() -> Self

geometry_ids are IfcMaterial ids. Only layers.rs builds these.

pub fn add(&mut self, geometry_id: u32, mesh: Mesh)

Add a sub-mesh

pub fn add_textured( &mut self, geometry_id: u32, mesh: Mesh, uvs: Vec<f32>, texture: TextureAttachment, )

Add a textured sub-mesh (#1781).

pub fn is_empty(&self) -> bool

Check if collection is empty

pub fn len(&self) -> usize

Get number of sub-meshes

pub fn into_combined_mesh(self) -> Mesh

Merge all sub-meshes into a single mesh (loses per-item identity)

pub fn iter(&self) -> impl Iterator<Item = &SubMesh>

Iterate over sub-meshes

Trait Implementations

impl Clone for SubMeshCollection

fn clone(&self) -> SubMeshCollection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SubMeshCollection

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

Formats the value using the given formatter.

impl Default for SubMeshCollection

fn default() -> SubMeshCollection

Returns the “default value” for a type.