Struct ParticlePool 

pub struct ParticlePool {
    pub slots: Vec<GpuParticle>,
    /* private fields */
}

Fixed-capacity particle pool with a free list for O(1) emit/recycle.

Fields

slots: Vec<GpuParticle>

All particle slots.

Implementations

impl ParticlePool

pub fn new(capacity: usize) -> Self

Create a pool with the given capacity.

pub fn capacity(&self) -> usize

Total capacity of the pool.

pub fn alive_count(&self) -> usize

Number of currently alive particles.

pub fn free_count(&self) -> usize

Number of free slots.

pub fn emit(&mut self, particle: GpuParticle) -> Option<usize>

Emit a particle from the pool. Returns the slot index, or None if the pool is full.

pub fn recycle_dead(&mut self)

Recycle all dead particles back to the free list.

pub fn alive_iter(&self) -> impl Iterator<Item = &GpuParticle>

Iterate over all alive particles (immutable).

pub fn alive_iter_mut(&mut self) -> impl Iterator<Item = &mut GpuParticle>

Iterate over all alive particles (mutable).