Method Spawn

trinity/Tr2RuntimeInstanceData.cpp:558–652

-------------------------------------------------------------------------------------- Description: Spawns particles into the particle system. --------------------------------------------------------------------------------------

//   Spawns particles into the particle system.
// --------------------------------------------------------------------------------------
void Tr2RuntimeInstanceData::Spawn()
{
	CCP_STATS_ZONE( __FUNCTION__ );

	if( m_particleSystem && m_particleSystem->IsValid() &&
		!m_layout.m_items.empty() && m_data )
	{
		// Validate geometry vertex declaration against particle system element declaration
		const Tr2ParticleElementDataMap& particleElements = m_particleSystem->GetElementDeclaration();
		std::vector<DeclarationMapping> geometryDeclarationMap;
		for( auto i = particleElements.begin(); i != particleElements.end(); ++i )
		{
			bool found = false;
			for( const auto& item : m_layout.m_items )
			{
				unsigned usageIndex = 0;
				if( i->first.m_type == Tr2ParticleElementDeclarationName::CUSTOM )
				{
					usageIndex = i->second.m_usageIndex;
				}
				if( item.m_usage == i->first.GetD3DUsage() && item.m_usageIndex == usageIndex )
				{
					DeclarationMapping mapping;
					mapping.inOffset = item.m_offset;
					mapping.buffer = i->second.m_bufferType;
					mapping.offset = i->second.m_offset;
					mapping.length = i->second.m_dimension;

					if( item.m_dataType >= m_layout.FLOAT32_1 + int( i->second.m_dimension ) - 1 &&
						item.m_dataType <= m_layout.FLOAT32_4 )
					{
						mapping.isFloat16 = false;
					}
					else if( ( item.m_dataType == m_layout.FLOAT16_2 && i->second.m_dimension <= 2 ) ||
							 item.m_dataType == m_layout.FLOAT16_4 )
					{
						CCP_LOGWARN(
							"Particle elements \"%s\" has FLOAT16 type in Tr2RuntimeInstanceData \"%s\", this degrades emitter performance",
							i->first.GetName().c_str(),
							m_name.c_str() );
						mapping.isFloat16 = true;
					}
					else
					{
						CCP_LOGERR( "Incompatible type for particle elements \"%s\" in Tr2RuntimeInstanceData \"%s\"",
									i->first.GetName().c_str(),
									m_name.c_str() );
						return;
					}
					geometryDeclarationMap.push_back( mapping );
					found = true;
					break;
				}
			}
			if( !found )
			{
				CCP_LOGERR( "No data for particle elements \"%s\" in Tr2RuntimeInstanceData \"%s\"",
							i->first.GetName().c_str(),