Struct CAEmitterLayerBuilder 

pub struct CAEmitterLayerBuilder { /* private fields */ }

Builder for a particle emitter layer.

let emitter = CAEmitterLayerBuilder::new()
    .position(320.0, 320.0)
    .shape(EmitterShape::Point)
    .particle(|p| p
        .birth_rate(100.0)
        .lifetime(5.0)
        .velocity(80.0)
        .color(Color::CYAN)
    )
    .build();

Implementations

impl CAEmitterLayerBuilder

pub fn new() -> Self

Create a new emitter layer builder.

pub fn position(self, x: f64, y: f64) -> Self

Set the emitter position.

pub fn size(self, width: f64, height: f64) -> Self

Set the emitter size (for Line, Rectangle, etc.).

pub fn shape(self, shape: EmitterShape) -> Self

Set the emitter shape.

pub fn mode(self, mode: EmitterMode) -> Self

Set the emitter mode.

pub fn render_mode(self, mode: RenderMode) -> Self

Set the render mode.

pub fn birth_rate(self, rate: f32) -> Self

Set the overall birth rate multiplier.

This multiplies the birth rate of all cells. Use 0.0 to pause emission, 1.0 for normal rate.

pub fn particle<F>(self, configure: F) -> Self

where F: FnOnce(CAEmitterCellBuilder) -> CAEmitterCellBuilder,

Add a particle type using a closure to configure it.

Example

.particle(|p| p
    .birth_rate(100.0)
    .lifetime(10.0)
    .velocity(100.0)
)

pub fn cell(self, cell: Retained<CAEmitterCell>) -> Self

Add a pre-built cell directly.

Prefer using .particle() for most cases.

pub fn build(self) -> Retained<CAEmitterLayer>

Build the CAEmitterLayer.

Trait Implementations

impl Default for CAEmitterLayerBuilder

fn default() -> Self

Returns the “default value” for a type.