Struct OrigamiPattern 

pub struct OrigamiPattern {
    pub vertices: Vec<Vec3>,
    pub fold_lines: Vec<FoldLine>,
    pub facets: Vec<OrigamiFacet>,
}

A complete crease pattern: vertices, fold lines, and facets.

The pattern stores both the flat (reference) configuration and can compute fold angles from an input folded state.

Fields

vertices: Vec<Vec3>

Vertices in the flat (unfolded) configuration.

fold_lines: Vec<FoldLine>

All crease lines.

facets: Vec<OrigamiFacet>

All planar facets.

Implementations

impl OrigamiPattern

pub fn new() -> Self

Create an empty pattern.

pub fn add_vertex(&mut self, v: Vec3) -> usize

Add a vertex, returning its index.

pub fn add_fold_line(&mut self, fl: FoldLine) -> usize

Add a fold line, returning its index.

pub fn add_facet(&mut self, facet: OrigamiFacet) -> usize

Add a facet, returning its index.

pub fn dihedral_angle(n1: &Vec3, n2: &Vec3) -> f64

Compute the fold angle of crease i given two face normals on either side.

Returns the dihedral angle in radians.

pub fn set_fold_parameter(&mut self, t: f64)

Set all fold angles proportionally to t ∈ [0, 1], where 0 = flat and 1 = maximum angle (π for mountain/valley).

pub fn degrees_of_freedom(&self) -> usize

Return the total number of degrees of freedom (independent fold angles).

For a generic crease pattern this is F - 1 by Euler’s formula, where F is the number of interior vertices.

pub fn gaussian_curvature_at(&self, _vi: usize) -> f64

Compute approximate Gaussian curvature at vertex vi using the angle deficit.

Returns None if the vertex index is out of range or has no adjacent facets.

Trait Implementations

impl Clone for OrigamiPattern

fn clone(&self) -> OrigamiPattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OrigamiPattern

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

Formats the value using the given formatter.

impl Default for OrigamiPattern

fn default() -> Self

Returns the “default value” for a type.