Struct ParticleEmitter 

pub struct ParticleEmitter {
    pub position: [f32; 3],
    pub emit_rate: f32,
    pub emit_accumulator: f32,
    pub initial_velocity: [f32; 3],
    pub velocity_spread: f32,
    pub lifetime_min: f32,
    pub lifetime_max: f32,
    pub mass: f32,
    pub active: bool,
}

Emits new particles into a ParticleBuffer over time.

Fields

position: [f32; 3]

World-space spawn origin.

emit_rate: f32

Target emission rate in particles per second.

emit_accumulator: f32

Fractional particle accumulator (sub-frame carry).

initial_velocity: [f32; 3]

Base initial velocity of emitted particles.

velocity_spread: f32

Cone half-angle (radians) for random velocity spread.

lifetime_min: f32

Minimum particle lifetime in seconds.

lifetime_max: f32

Maximum particle lifetime in seconds.

mass: f32

Mass assigned to emitted particles.

active: bool

Whether this emitter is currently active.

Implementations

impl ParticleEmitter

pub fn new(pos: [f32; 3], rate: f32, vel: [f32; 3], lifetime: f32) -> Self

Create a new emitter. lifetime is used as both min and max.

pub fn emit( &mut self, buffer: &mut ParticleBuffer, dt: f32, rng_seed: u64, ) -> usize

Emit particles for a time-step dt. Returns how many were spawned.