pub fn gradient_curve3(
model: &Model,
entity: EntityId,
units: AlignmentUnits,
) -> AlignmentResult<Curve3>Expand description
The exact 3D centreline of entity, an IfcAlignment.
Same composition the graph lowering uses, returned directly so a caller
can pass it to a CurveEvaluator. Returning the curve rather than a
point keeps evaluation the caller’s choice: this crate stores exact
geometry and never computes on it.