Struct SizeOverLifetime 

pub struct SizeOverLifetime {
    pub start: f64,
    pub end: f64,
}

Linear nonnegative size multiplier over normalized lifetime.

Fields

start: f64

Birth multiplier.

end: f64

End-of-life multiplier.

Trait Implementations

impl Clone for SizeOverLifetime

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SizeOverLifetime

impl Debug for SizeOverLifetime

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

Formats the value using the given formatter.

impl ParticleModifier for SizeOverLifetime

fn apply( &self, particle: &mut Particle, _: f32, _: Time, _: &mut Random, ) -> Result<(), ValidationError>

Updates one live particle; index and canonical age remain engine-owned.

fn resets_color(&self) -> bool

Requests birth-color restoration before the ordered modifier chain. Multiplicative lifetime energy curves use this to avoid frame-count accumulation.

fn work(&self) -> u64

Conservative per-particle operator work charged before replay.

fn apply_event( &self, particle: &mut Particle, step_seconds: f32, time: Time, random: &mut Random, ) -> Result<bool, ValidationError>

Optional predicted-step collision response, preserving the original callback API.