Struct Elevated3

pub struct Elevated3 {
    pub plan: Box<Curve2>,
    pub elevation: ElevationLaw,
}

A planar curve carrying an independent elevation law.

This is the composition an alignment centreline actually is: the plan is exact – including the transition spirals a Curve2::Intrinsic holds – and the vertical profile is exact, and neither is approximated to pair them. Evaluation is parameterised by PLAN DISTANCE, which is the parameter both halves are authored against.

Composition rather than re-encoding: a Curve3::BSpline fitted through the pair would lose both. Storing the two laws keeps each one’s own exactness and lets a consumer recover either half unchanged.

Only a plan whose parameter is arc length (line, circle, intrinsic) can carry a law. A B-spline’s parameter is not a distance, so evaluators refuse an elevated B-spline plan rather than reinterpret the law (ADR 0060).

Fields

plan: Box<Curve2>

Horizontal layout. Boxed to keep Curve3 small.

elevation: ElevationLaw

Height as a function of distance along plan.

Implementations

impl Elevated3

pub fn new(plan: Curve2, elevation: ElevationLaw) -> Self

Pair a planar curve with an elevation law.

Trait Implementations

impl Clone for Elevated3

fn clone(&self) -> Elevated3

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Elevated3

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

Formats the value using the given formatter.

impl PartialEq for Elevated3

fn eq(&self, other: &Elevated3) -> 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 StructuralPartialEq for Elevated3