Method SpawnParticles

trinity/Particle/Tr2DynamicEmitter.cpp:150–210

-------------------------------------------------------------------------------------- Description: Implements ITr2GenericEmitter interface. Spawns particles. Arguments: arguments - Update arguments position - Position of the "parent" particle (if the emitter owning this generator is "emit during life" or "emit on death" emitter and parent particle has position element); otherwise is nullptr. velo

//		defined rate value.
// --------------------------------------------------------------------------------------
void Tr2DynamicEmitter::SpawnParticles( const UpdateArguments& arguments,
										const Vector3* position,
										const Vector3* velocity,
										float rateModifier )
{
	CCP_STATS_ZONE( __FUNCTION__ );

	if( !m_isValid || m_particleSystem == nullptr )
	{
		return;
	}
	if( m_declarationHash != m_particleSystem->GetElementDeclarationHash() )
	{
		m_isValid = false;
		return;
	}

	// spawn rate
	if( m_rate <= 0 )
	{
		return;
	}
	m_accumulatedRate += m_rate * rateModifier;
	int32_t count = int32_t( m_accumulatedRate );
	m_accumulatedRate -= floor( m_accumulatedRate );
	if( m_maxParticles >= 0 && int32_t( m_emittedParticles ) + count > m_maxParticles )
	{
		count = std::max( m_maxParticles - int32_t( m_emittedParticles ), 0 );
	}
	m_emittedParticles += count;

	// update position if we have any
	Vector3 transformedEmitterPos( 0.f, 0.f, 0.f );
	if( position )
	{
		transformedEmitterPos = *position;
	}

	float* particle[Tr2ParticleElementData::COUNT];
	for( int32_t i = 0; i < count; ++i )
	{
		if( !m_particleSystem->InsertParticle( particle ) )
		{
			// Particle system is full
			return;
		}

		// build an interpolated position "between frames"
		XMFLOAT4A interpolatedEmitterPos( transformedEmitterPos.x, transformedEmitterPos.y, transformedEmitterPos.z, 1.f );

		// let every attached generator have it's way with the new particle
		for( auto it = m_generators.begin(); it != m_generators.end(); ++it )
		{
			( *it )->Generate( reinterpret_cast<Vector3*>( &interpolatedEmitterPos ), velocity, particle );
		}
		m_particleSystem->DoneInsertingParticle();
	}