ParticlePool< T, MaxN > Struct Template Reference

Fixed-capacity particle pool with O(1) swap-remove. More...

#include <ParticlePool.hpp>

Public Member Functions
T *	spawn ()
	Allocate a new slot (zero-initialised). Returns nullptr when full.
void	kill (uint32_t i)
	O(1) swap-remove. Does NOT preserve order.
void	update (auto fn)
	Iterate all live particles.
const T *	rawData () const
	Pointer to the contiguous live data for GPU upload.
uint32_t	liveCount () const
bool	empty () const
bool	full () const

Public Attributes
std::array< T, MaxN >	data {}
uint32_t	count = 0

Detailed Description

template<typename T, uint32_t MaxN>
struct ParticlePool< T, MaxN >

Fixed-capacity particle pool with O(1) swap-remove.

Particles are stored in a contiguous array[0..count-1]. Calling kill(i) swaps data[i] with data[count-1] and decrements count — stable ordering is NOT preserved (intentional; no sort needed for upload).

Usage: auto* p = pool.spawn(); // nullptr when full pool.update([](T& p) -> bool { return p.lifetime > 0; }); pool.kill(i);

Member Function Documentation

empty()

template<typename T , uint32_t MaxN>

bool ParticlePool< T, MaxN >::empty ( ) const

inline

full()

template<typename T , uint32_t MaxN>

bool ParticlePool< T, MaxN >::full ( ) const

inline

kill()

template<typename T , uint32_t MaxN>

void ParticlePool< T, MaxN >::kill ( uint32_t  i )

inline

O(1) swap-remove. Does NOT preserve order.

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liveCount()

template<typename T , uint32_t MaxN>

uint32_t ParticlePool< T, MaxN >::liveCount ( ) const

inline

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rawData()

template<typename T , uint32_t MaxN>

const T * ParticlePool< T, MaxN >::rawData ( ) const

inline

Pointer to the contiguous live data for GPU upload.

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spawn()

template<typename T , uint32_t MaxN>

T * ParticlePool< T, MaxN >::spawn ( )

inline

Allocate a new slot (zero-initialised). Returns nullptr when full.

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update()

template<typename T , uint32_t MaxN>

void ParticlePool< T, MaxN >::update ( auto  fn )

inline

Iterate all live particles.

fn(T& p) → bool: return false to kill. Iterates backwards so kill() inside fn doesn't skip elements.

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Member Data Documentation

count

template<typename T , uint32_t MaxN>

uint32_t ParticlePool< T, MaxN >::count = 0

data

template<typename T , uint32_t MaxN>

std::array<T, MaxN> ParticlePool< T, MaxN >::data {}

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The documentation for this struct was generated from the following file:

• src/client/particles/ParticlePool.hpp