Struct Emitter 

pub struct Emitter {

    pub origin: Option<EmitterOrigin>,
    pub rate: f32,
    pub life: EmitterRange,
    pub direction: EmitterDirection,
    pub speed: EmitterSpeed,
    pub spawn_radius: EmitterRange,
    pub shape: EmitterShape,
    pub length: EmitterRange,
    pub color: String,
    pub width: f32,
    pub seed: u64,
    pub timing: TimingConfig,
    pub style: CssStyle,
    pub timeline: Vec<TimelineStep>,
}

A radial particle field with a real per-particle lifecycle: born, travelling, dying and immediately respawned, continuously, so the field at any instant is a mix of ages rather than one cohort.

Every particle’s state is derived in closed form from (seed, index, time) — nothing is simulated frame-to-frame — so any instant renders independently and byte-identically no matter how it is reached (render, still --time, or the same frame twice). Supersedes the deprecated particle, whose fixed compositions had no lifecycle at all.

Fields

origin: Option<EmitterOrigin>

Point particles are born around, in the emitter’s own box, in pixels from its top-left corner. Defaults to the box centre.

rate: f32

Average number of particles born per second. Combined with life, this sets how many particles are alive at any instant (concurrency = rate * average lifetime) — there is no separate particle count to keep in sync by hand.

life: EmitterRange

Lifetime range in seconds, [min, max]. Each particle draws its own lifetime once, deterministically, from seed and its index.

direction: EmitterDirection

speed: EmitterSpeed

spawn_radius: EmitterRange

Ring, in pixels from origin, particles are born on: [min, max].

shape: EmitterShape

length: EmitterRange

Streak length range in pixels, [min, max]. Unused when shape is dot.

color: String

Particle color as a hex string.

width: f32

Stroke width in pixels for a streak, diameter for a dot.

seed: u64

Deterministic seed: the same seed and the same instant always paint the same pixels.

timing: TimingConfig

style: CssStyle

timeline: Vec<TimelineStep>

Trait Implementations

impl Animatable for Emitter

fn animation_effects(&self) -> &[AnimationEffect]

fn timeline_steps(&self) -> &[TimelineStep]

impl Debug for Emitter

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Emitter

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for Emitter

fn schema_name() -> String

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl Painter for Emitter

fn paint_content( &self, canvas: &Canvas, layout: &BoxLayout, _props: &AnimatedProperties, ctx: &PaintCtx, )

fn intrinsic_size( &self, _available: AvailableSize, _ctx: &MeasureCtx, ) -> Option<(f32, f32)>

impl Serialize for Emitter

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Styled for Emitter

fn style_config(&self) -> &CssStyle

impl StyledMut for Emitter

fn style_config_mut(&mut self) -> &mut CssStyle

impl Timed for Emitter

fn timing(&self) -> (Option<f64>, Option<f64>)