Struct Face 

pub struct Face<S: Scalar> {
    pub surface: NurbSurface3D<S>,
    pub outer: BoundaryType,
    pub holes: Vec<BoundaryType>,
    pub shell: ShellId,
}

A trimmed patch of surface: everything inside outer and outside every loop in holes.

The two are deliberately separate fields rather than one list with the outer loop by convention at index 0. A face always has exactly one outer boundary — that is what makes it a face — while holes are a genuinely variable collection, and encoding that in the type means no code has to re-establish it. It also removes a whole class of bug where a hole is accidentally treated as the outer loop (or vice versa) after a split/merge reorders the list.

Fields

surface: NurbSurface3D<S>

outer: BoundaryType

holes: Vec<BoundaryType>

shell: ShellId

Implementations

impl<S: Scalar> Face<S>

pub fn boundaries(&self) -> impl Iterator<Item = BoundaryType> + '_

Every boundary, outer loop first.

pub fn boundaries_mut(&mut self) -> impl Iterator<Item = &mut BoundaryType> + '_

Every boundary, outer loop first, for in-place rewriting — used by the operations that re-anchor or rename boundaries wholesale (a vertex being merged away, a loop’s anchor coedge being deleted) without caring which kind each one is.

pub fn boundary(&self, index: BoundaryIndex) -> Option<BoundaryType>

The boundary index names, or None if it names a hole this face does not have.

pub fn set_boundary( &mut self, index: BoundaryIndex, boundary: BoundaryType, ) -> bool

Re-anchor the boundary index names on a different loop. Needed after any restructuring that rewires next/prev, since the previous anchor may no longer sit on the ring the boundary now describes.

Trait Implementations

impl<S: Clone + Scalar> Clone for Face<S>

fn clone(&self) -> Face<S>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S: Debug + Scalar> Debug for Face<S>

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

Formats the value using the given formatter.