Struct AnimationChannelBuilder 

pub struct AnimationChannelBuilder {
    pub node_index: usize,
    pub path: String,
    pub interpolation: Interpolation,
    pub keyframes: Vec<Keyframe>,
}

Builder for a single animation channel (translation / rotation / scale).

Fields

node_index: usize

Target node index.

path: String

Target path: “translation”, “rotation”, or “scale”.

interpolation: Interpolation

Interpolation mode.

keyframes: Vec<Keyframe>

Ordered keyframes (should be sorted by time).

Implementations

impl AnimationChannelBuilder

pub fn new( node_index: usize, path: impl Into<String>, interpolation: Interpolation, ) -> Self

Create a new channel builder.

pub fn push(self, time: f32, value: Vec<f32>) -> Self

Append a keyframe.

pub fn duration(&self) -> f32

Duration of the channel (time of the last keyframe, or 0 if empty).

pub fn len(&self) -> usize

Number of keyframes.

pub fn is_empty(&self) -> bool

True if there are no keyframes.

pub fn times(&self) -> Vec<f32>

Collect all time stamps.

pub fn values_flat(&self) -> Vec<f32>

Collect all value payloads flattened into one Vec.

pub fn to_json_fragments( &self, sampler_index: usize, times_accessor: usize, values_accessor: usize, ) -> (String, String)

Serialize sampler + channel pair to JSON fragments.