//! Vertical segments: grades and parabolic curves.
//!
//!
//! Implementation is tracked in `../PLAN.md`.
//! ## Internal split
//!
//! - `layout.rs`: profile order.
//! - `segment.rs`: gradients/arcs/parabolas.
mod layout;
mod segment;
mod transition;
pub use segment::{read_vertical_segment, VerticalSegment, VerticalSegmentType};