Enum FaceGroups 

#[non_exhaustive]
pub enum FaceGroups<'a> {
    Single,
    PerTriangle(&'a [FaceGroup]),
    Planar,
}

The face groups of one mesh.

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.

Single

Every triangle is in FaceGroup(0).

PerTriangle(&'a [FaceGroup])

One id per triangle; the length equals the triangle count.

Planar

The planar patches of the mesh (ADR 0106). Two triangles are in one group when a chain of triangles joins them in which every two consecutive triangles share an edge that has exactly these two triangles and whose model-space normals are parallel and point the same way. Parallel and same-facing is decided exactly as n1 × n2 = 0 in all three components and n1 · n2 > 0; no tolerance enters. A group’s id is FaceGroup(i) for the smallest triangle index i in it, so it does not depend on the view or on the winding of the whole mesh. Providers resolve the groups before use.

Implementations

impl FaceGroups<'_>

pub fn of(&self, triangle: usize) -> FaceGroup

The group of triangle triangle.

Panics

Panics for PerTriangle when triangle is out of range; providers check the length first. Panics for Planar, whose groups depend on the geometry; providers resolve it first.

Trait Implementations

impl<'a> Clone for FaceGroups<'a>

fn clone(&self) -> FaceGroups<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for FaceGroups<'a>

impl<'a> Debug for FaceGroups<'a>

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

Formats the value using the given formatter.

impl<'a> Eq for FaceGroups<'a>

impl<'a> PartialEq for FaceGroups<'a>

fn eq(&self, other: &FaceGroups<'a>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<'a> StructuralPartialEq for FaceGroups<'a>