Struct Tread 

pub struct Tread { /* private fields */ }

One tread: an upward-facing horizontal face of a flight.

front and back are the positions along the flight’s walking line where the line climbs onto the tread and leaves it; the front edge is the nosing. A service may add the nosing edge itself, the tread’s extent across the walking line and whether the riser below it is closed.

Implementations

impl Tread

pub fn try_new( elevation: ElevationInterval, front: ElevationInterval, back: ElevationInterval, ) -> Result<Self, WalkingSurfaceError>

A tread at elevation spanning front to back along the walking line.

pub fn with_sides( self, left: ElevationInterval, right: ElevationInterval, ) -> Result<Self, WalkingSurfaceError>

The tread with the positions of its sides along across its walking direction: the flight’s for a straight flight, the direction square to its nosing for a turning flight’s tread. A service states them only where the tread fills the rectangle between its front, back and sides, so the width holds all along its depth; a winder has none.

pub fn with_nosing(self, nosing: PlanSegment) -> Self

The tread with its nosing edge in plan.

pub fn with_riser_below(self, riser: RiserClosure) -> Self

The tread with whether the riser below it closes the step.

pub fn sides(&self) -> Option<(ElevationInterval, ElevationInterval)>

The positions of the tread’s sides across its walking direction, when measured.

pub fn width(&self) -> Option<MeasuredInterval>

The tread’s width across its walking direction, when its sides were measured. Nothing is deducted for handrails.

pub fn elevation(&self) -> ElevationInterval

Elevation of the tread’s surface.

pub fn front(&self) -> ElevationInterval

Position of the front edge (the nosing) along the walking line.

pub fn back(&self) -> ElevationInterval

Position of the back edge along the walking line.

pub fn nosing(&self) -> Option<PlanSegment>

The nosing edge in plan, when measured.

pub fn riser_below(&self) -> RiserClosure

Whether the riser below the tread closes the step.

pub fn depth(&self) -> MeasuredInterval

The tread’s depth along the walking line, back less front.

pub fn is_exact(&self) -> bool

Whether every position of the tread is known exactly.

Trait Implementations

impl Clone for Tread

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Tread

impl Debug for Tread

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

Formats the value using the given formatter.

impl PartialEq for Tread

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Tread