Struct Placement 

pub struct Placement {
    pub matrix: [f64; 16],
}

A product’s placement, composed from its IfcLocalPlacement chain.

Which frame this is in, because the crate contains three and a bare [f64; 16] cannot tell them apart:

• Column-major 4×4 (nalgebra’s as_slice order). Translation is at indices 12, 13, 14 — not 3, 7, 11. The instancing path uses ROW-major (mat4_to_row_major); this is not that.
• Translation is in metres: the file’s length unit scale is applied. The basis is unitless.
• No RTC rebase. Georeferenced models are shifted toward the origin for f32 precision before meshing; this is not shifted.
• No Z-up → Y-up conversion. The glTF and OBJ exporters map (x, y, z) → (x, z, −y); this does not.

So: the IFC world frame, which is the frame the file itself is in and not the frame any exporter emits. A consumer combining this with exported geometry has to account for the last two itself.

Fields

matrix: [f64; 16]

Column-major 4×4.

Implementations

impl Placement

pub fn translation(&self) -> [f64; 3]

The translation, in metres.

Trait Implementations

impl Clone for Placement

fn clone(&self) -> Placement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Placement

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

Formats the value using the given formatter.

impl PartialEq for Placement

fn eq(&self, other: &Placement) -> 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 Placement

impl StructuralPartialEq for Placement