Struct LightSettings 

pub struct LightSettings {

    pub open: bool,
    pub active: bool,
    pub color: Color32,
    pub density: usize,
    pub radius_min: f32,
    pub radius_max: f32,
    pub intensity: f32,
    pub motion: LightMotion,
    pub wind: Vec2,
    pub flicker: f32,
    pub lifetime_min: f32,
    pub lifetime_max: f32,
    pub layer: ParticleLayer,
}

User-facing knobs for Light.

The defaults are deliberately neutral — a warm white, low density, wide soft radii, gentle flicker and multi-second lifetimes — so the effect can be tuned to a particular screen instead of shipping one screen’s look.

Fields

open: bool

Settings-window visibility. Default false (the example opens it).

active: bool

Whether the effect is drawn at all.

color: Color32

Mote color.

density: usize

Number of motes.

radius_min: f32

Minimum mote radius in pixels.

radius_max: f32

Maximum mote radius in pixels.

intensity: f32

Global intensity multiplier in 0.0..=1.0.

motion: LightMotion

Motion model.

wind: Vec2

Global wind vector (x = horizontal, y = vertical).

flicker: f32

Flicker depth in 0.0..=1.0 (0 disables flicker).

lifetime_min: f32

Minimum mote lifetime in seconds.

lifetime_max: f32

Maximum mote lifetime in seconds.

layer: ParticleLayer

Layer the effect is painted on.

Implementations

impl LightSettings

pub fn reset(&mut self)

Knobs back to defaults; open is preserved (a reset must not close the window).

pub fn show_window(&mut self, ctx: &Context) -> Option<Response>

Themed floating settings window; returns the window’s outer Response when open.

Window chrome plus a vertical scroll area around Self::body_ui, so a viewport shorter than the controls scrolls instead of clipping them.

pub fn body_ui(&mut self, ui: &mut Ui)

Draw the settings controls into ui — no window chrome.

Render them in your own container (egui::Window, SidePanel, ScrollArea, …) instead of using Self::show_window. If that container can be shorter than the controls, wrap it in an egui::ScrollArea.

Trait Implementations

impl Clone for LightSettings

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LightSettings

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

Formats the value using the given formatter.

impl Default for LightSettings

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for LightSettings

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LightSettings