Struct ExpressionLibrary 

pub struct ExpressionLibrary { /* private fields */ }

A library of named expression presets.

Implementations

impl ExpressionLibrary

pub fn new() -> Self

Create an empty library.

pub fn add(&mut self, preset: ExpressionPreset)

Add a preset to the library (keyed by preset.name).

pub fn get(&self, name: &str) -> Option<&ExpressionPreset>

Look up a preset by name.

pub fn list_names(&self) -> Vec<&str>

Return sorted list of all preset names.

pub fn list_by_tag(&self, tag: &str) -> Vec<&ExpressionPreset>

Return all presets that carry the given tag.

pub fn count(&self) -> usize

Number of presets in the library.

pub fn default_library() -> Self

Build a default library with ~11 common facial expressions.

pub fn blend( &self, name_a: &str, name_b: &str, t: f32, ) -> Option<HashMap<String, f32>>

Linearly interpolate morph weights between two named presets.

t = 0.0 → all weights from name_a; t = 1.0 → all weights from name_b. Keys not present in a preset are treated as weight 0.0.

pub fn apply_intensity(preset: &ExpressionPreset) -> HashMap<String, f32>

Scale a preset’s weights by its intensity field.

pub fn combine(presets: &[&ExpressionPreset]) -> HashMap<String, f32>

Additively combine multiple presets (clamped to [0, 1]).

pub fn random_blend( presets: &[&ExpressionPreset], seed: u32, ) -> HashMap<String, f32>

Generate a pseudo-random blend of 2–3 presets from the given slice.

Uses a simple LCG seeded by seed to pick indices and mixing weights.

pub fn find_nearest<'a>( &'a self, weights: &HashMap<String, f32>, ) -> Option<&'a str>

Find the preset most similar to the given weight map (L2 distance).

Returns None if the library is empty.

Trait Implementations

impl Default for ExpressionLibrary

fn default() -> Self

Returns the “default value” for a type.