CNewParticleEffect *CNewParticleEffect::CreateOrAggregate( CBaseEntity *pOwner, CParticleSystemDefinition *pDef,
Vector const &vecAggregatePosition, const char *pDebugName,
int nSplitScreenSlot )
{
CNewParticleEffect *pAggregateTarget = NULL;
// see if we should aggregate
bool bCanAggregate = ( pOwner == NULL ) && ( pDef->m_flAggregateRadius > 0.0 ) && ( cl_aggregate_particles.GetInt() != 0 );
if ( bCanAggregate )
{
CParticleSystemDefinition *pDefFallback = pDef;
do
{
float flAggregateDistSqr = ( pDefFallback->m_flAggregateRadius * pDefFallback->m_flAggregateRadius ) + 0.1;
for( CParticleCollection *pSystem = pDefFallback->FirstCollection(); pSystem; pSystem = pSystem->GetNextCollectionUsingSameDef() )
{
CNewParticleEffect *pEffectCheck = static_cast<CNewParticleEffect *>( pSystem );
if ( ! pEffectCheck->m_bDisableAggregation )
{
float flDistSQ = vecAggregatePosition.DistToSqr( pEffectCheck->m_vecAggregationCenter );
if ( ( flDistSQ < flAggregateDistSqr ) &&
( pSystem->m_nMaxAllowedParticles - pSystem->m_nActiveParticles > pDefFallback->m_nAggregationMinAvailableParticles ) &&
( pEffectCheck->m_nSplitScreenUser == nSplitScreenSlot ) )
{
flAggregateDistSqr = flDistSQ;
pAggregateTarget = pEffectCheck;
}
}
}
pDefFallback = pDefFallback->GetFallbackReplacementDefinition();
} while ( pDefFallback );
}
if ( ! pAggregateTarget )
{
// we need a new one
pAggregateTarget = new CNewParticleEffect( pOwner, pDef );
pAggregateTarget->SetDrawOnlyForSplitScreenUser( nSplitScreenSlot );
pAggregateTarget->SetDynamicallyAllocated( true );
}
else
{
// just reset the old one
pAggregateTarget->Restart( RESTART_RESET_AND_MAKE_SURE_EMITS_HAPPEN );
}
if ( bCanAggregate )
{
pAggregateTarget->m_vecAggregationCenter = vecAggregatePosition;
}
pAggregateTarget->m_pDebugName = pDebugName;
pAggregateTarget->m_bDisableAggregation = false;
return pAggregateTarget;
}
