Enum TriangulationError

#[non_exhaustive]
pub enum TriangulationError {
    TooFewPoints,
    AllPointsCollinear,
    VertexUnplaceable {
        index: u32,
    },
    ConstraintOutOfRange {
        index: u32,
    },
    CrossingConstraints {
        a: u32,
        b: u32,
    },
}

Why a triangulation could not be produced.

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.

TooFewPoints

Fewer than three points were supplied, so no triangle exists.

AllPointsCollinear

Every input point is collinear, so the triangulation has zero area.

Reported rather than returning an empty triangulation: a caller that asked to triangulate a degenerate polygon has a bug upstream, and an empty result would hide it.

VertexUnplaceable

A vertex could not be placed in any triangle during insertion.

Indicates a corrupted adjacency rather than bad input. Reported so a missing vertex surfaces as an error instead of as a silent hole in an otherwise valid-looking mesh.

Fields

index: u32

Index of the vertex that could not be placed.

ConstraintOutOfRange

A constraint referenced a vertex index that does not exist.

Fields

index: u32

The offending index.

CrossingConstraints

A constraint could not be recovered after insertion.

Only reachable when two constraints cross: an edge cannot survive if another required edge passes through it. The crossing point would have to be inserted as a vertex, which changes the caller’s input, so this is reported instead of silently repaired.

Fields

a: u32

First endpoint of the constraint that could not be recovered.

b: u32

Second endpoint.

Trait Implementations

impl Clone for TriangulationError

fn clone(&self) -> TriangulationError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TriangulationError

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

Formats the value using the given formatter.

impl Display for TriangulationError

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

Formats the value using the given formatter.

impl Error for TriangulationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for TriangulationError

fn eq(&self, other: &TriangulationError) -> 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 Copy for TriangulationError

impl Eq for TriangulationError

impl StructuralPartialEq for TriangulationError