Struct SurfaceCurvature 

pub struct SurfaceCurvature {
    pub max: f64,
    pub min: f64,
    pub max_direction: Direction,
    pub min_direction: Direction,
    pub normal: Direction,
}

A surface’s curvature at one place: the principal curvatures and the directions they are taken in, with the mean and Gaussian curvatures they combine to.

What curvature display, zebra analysis and a fillet’s seat all ask. The principal directions are unit tangents in space, perpendicular to each other; at an umbilic (where every direction curves the same, as everywhere on a sphere or a plane) they are any perpendicular pair in the tangent plane, and SurfaceCurvature::is_umbilic says so.

Fields

max: f64

The largest normal curvature.

min: f64

The smallest normal curvature.

max_direction: Direction

The tangent direction of the largest.

min_direction: Direction

The tangent direction of the smallest.

normal: Direction

The unit normal the curvatures are signed against: positive where the surface curves towards it.

Implementations

impl SurfaceCurvature

pub fn mean(&self) -> f64

The mean curvature, (max + min) / 2.

pub fn gaussian(&self) -> f64

The Gaussian curvature, max · min.

pub fn is_umbilic(&self, tol: Tolerances) -> bool

Whether the two principal curvatures are equal to within tol’s angular resolution of their size, so no direction is principal above another.

Trait Implementations

impl Clone for SurfaceCurvature

fn clone(&self) -> SurfaceCurvature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SurfaceCurvature

impl Debug for SurfaceCurvature

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

Formats the value using the given formatter.

impl PartialEq for SurfaceCurvature

fn eq(&self, other: &SurfaceCurvature) -> 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 SurfaceCurvature