Struct ParticleBurst 

pub struct ParticleBurst { /* private fields */ }

A tiny particle burst — circles fired outward from a point that fall under gravity and fade out. Deterministic given the same seed, so a test can pin it. Advance with ParticleBurst::update, render with ParticleBurst::paint.

Implementations

impl ParticleBurst

pub fn new(origin: Pos2, count: usize, color: Color32, seed: u64) -> Self

Fire count particles from origin outward in a ring, with speeds jittered by seed (deterministic — no RNG crate).

pub fn update(&mut self, dt: f32)

Advance every particle by dt seconds (integrate velocity + gravity).

pub fn finished(&self) -> bool

All particles have aged past their lifetime — the burst is done and can be dropped.

pub fn paint(&self, painter: &Painter)

Paint each live particle as a fading circle.

Trait Implementations

impl Clone for ParticleBurst

fn clone(&self) -> ParticleBurst

Returns a duplicate of the value.

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

Performs copy-assignment from source.