# ifc-alignment
IFC4X3 linear positioning: `IfcAlignment` with its horizontal, vertical and
cant layouts, referents and stationing, and linear placement. Alignment
curves, transition spirals included, are lowered exactly into the
format-neutral Axiolid geometry model; nothing is tessellated or numerically
integrated.
```bash
cargo add ifc-alignment
```
The [`openbim-ifc`](https://crates.io/crates/openbim-ifc) facade also provides it behind its
`alignment` feature.
- API documentation: [docs.rs/ifc-alignment](https://docs.rs/ifc-alignment)
- Reference page: [openbimrs.github.io/ifc](https://openbimrs.github.io/ifc/reference/crates/ifc-alignment)
- Source and issues: [github.com/openbimrs/ifc](https://github.com/openbimrs/ifc)
## Design notes
- This crate is the geometric bridge for alignments, not a road or rail
application. Product workflows (corridors, cross-sections, track
design) and rendering policy stay out of it and belong to the
application that composes it.