Enum PinchPolicy 

#[non_exhaustive]
pub enum PinchPolicy {
    Refuse,
    Accept,
}

How a triangulation treats rings that touch at a single point (#262): a hole touching the outer ring or another hole at a vertex, an outer ring pinched at a vertex, or a vertex lying on another ring’s edge.

The region such rings bound is valid, but the surface an extrusion builds over it is not a two-manifold: the walls of the two rings meet along one edge, which four faces then share. So solids refuse it and regions and surface patches accept it.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Refuse

Refuse touching rings with InvalidInput naming them. For anything that must close into a two-manifold: extrusion and loft caps.

Accept

Triangulate the region the touching rings bound. For 2D regions and planar surface patches: a plan footprint that is a union of shadows touching at a corner, a space-boundary surface, a planar face of a B-rep (whose edges are the ring edges either way).

Trait Implementations

impl Clone for PinchPolicy

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 PinchPolicy

impl Debug for PinchPolicy

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

Formats the value using the given formatter.

impl Eq for PinchPolicy

impl Hash for PinchPolicy

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PinchPolicy

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PinchPolicy