Struct Delta 

pub struct Delta {
    pub id: VisualStateId,
    pub keyframe_ref: VisualStateId,
    pub prev_delta_ref: Option<VisualStateId>,
    pub timestamp: StateTime,
    pub delta_type: DeltaType,
    pub face_delta: Option<FaceDelta>,
    pub pose_delta: Option<PoseDelta>,
    pub scene_delta: Option<SceneDelta>,
    pub sequence: u64,
}

Delta - Changes since last keyframe or delta

Fields

id: VisualStateId

Delta identifier

keyframe_ref: VisualStateId

Reference to keyframe this delta is based on

prev_delta_ref: Option<VisualStateId>

Reference to previous delta (if any)

timestamp: StateTime

Timestamp

delta_type: DeltaType

What changed

face_delta: Option<FaceDelta>

Face delta (if changed)

pose_delta: Option<PoseDelta>

Pose delta (if changed)

scene_delta: Option<SceneDelta>

Scene delta (if changed)

sequence: u64

Sequence number

Implementations

impl Delta

pub fn from_states( prev: &VisualState, curr: &VisualState, keyframe_ref: VisualStateId, ) -> Self

Create a delta from two visual states

pub fn is_empty(&self) -> bool

Is this an empty delta (no changes)?

pub fn estimated_size(&self) -> usize

Estimated size in bytes

pub fn apply(&self, base: &VisualState) -> VisualState

Apply this delta to a visual state

Trait Implementations

impl Clone for Delta

fn clone(&self) -> Delta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Delta

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

Formats the value using the given formatter.