Struct FrameLawBounds 

#[non_exhaustive]
pub struct FrameLawBounds {
    pub point: [f64; 2],
    pub tangent: [f64; 2],
    pub lateral: [f64; 2],
    pub up: [f64; 2],
    pub measure: f64,
    pub point_error: f64,
    pub axis_error: f64,
    pub forward: f64,
}

Certified suprema, over a span of station distance, of the derivatives of a section frame law in that distance; see the module documentation.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

point: [f64; 2]

sup |O'| and sup |O''| of the basis point.

tangent: [f64; 2]

sup |T'| and sup |T''| of the unit tangent.

lateral: [f64; 2]

sup |L'| and sup |L''| of the lateral axis.

up: [f64; 2]

sup |U'| and sup |U''| of the up axis.

measure: f64

How far the distance a frame is read at may lie from the distance asked for (see the measure).

point_error: f64

How far a frame’s point read at a distance may lie from the exact frame law’s point at the distance it truly stands at: zero where the frame is read in closed form, a certified bound where it is read by quadrature (FrameLaw, #316).

axis_error: f64

How far each of a read frame’s axes may lie from the exact frame law’s, likewise.

forward: f64

A certified lower bound over the span of O'.N, N the frame’s tangent: one in arc length and in plan distance, the horizontal floor rho under the plan reading of an arc-length space curve, times a placement’s smallest column length, less rounding (#361).

Implementations

impl FrameLawBounds

pub fn is_straight(&self) -> bool

Whether the frame is constant and the point moves on a straight line: every second derivative, and every axis’s first, is zero.

Trait Implementations

impl Clone for FrameLawBounds

fn clone(&self) -> FrameLawBounds

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FrameLawBounds

impl Debug for FrameLawBounds

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

Formats the value using the given formatter.

impl PartialEq for FrameLawBounds

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FrameLawBounds