Method UpdateSourceData

trinity/Tr2ShLightingManager.cpp:394–437

-------------------------------------------------------------------------------------- Description: Updates packed secondary source data. --------------------------------------------------------------------------------------

//   Updates packed secondary source data.
// --------------------------------------------------------------------------------------
void Tr2ShLightingManager::UpdateSourceData()
{
	CCP_STATS_ZONE( __FUNCTION__ );

	m_sourceCount = 0;
	size_t dataSize = sizeof( SourceData ) * ( ( m_sources.size() + m_lights.size() + 3 ) / 4 ) * 4;
	if( m_sourceData.size() < dataSize )
	{
		m_sourceData.resize( "Tr2ShLightingManager.m_sourceData", dataSize );
	}
	if( m_sourceData.empty() )
	{
		return;
	}
	float maxLight = MaxVectorComponent( m_sunColor );
	SourceData* data = reinterpret_cast<SourceData*>( m_sourceData.get() );
	for( auto it = m_sources.begin(); it != m_sources.end(); ++it )
	{
		if( *it->radius > 0 )
		{
			data->position = *it->position;
			data->radius = *it->radius;
			data->albedo = *reinterpret_cast<const Vector3*>( it->albedo ) * m_secondaryIntensity;
			data->cutoffMultiplier = 1;
			data->emissive = *reinterpret_cast<const Vector3*>( it->emissive ) * m_secondaryIntensity;
			data->maxColorComponent = std::max( MaxVectorComponent( data->albedo ) * maxLight, MaxVectorComponent( data->emissive ) );
			++data;
			++m_sourceCount;
		}
	}
	for( auto it = m_lights.begin(); it != m_lights.end(); ++it )
	{
		Color color;
		( *it )->GetLight( data->position, data->radius, color );
		data->albedo = Vector3( 0, 0, 0 );
		data->cutoffMultiplier = 0;
		data->emissive = *reinterpret_cast<const Vector3*>( &color ) * m_primaryIntensity;
		data->maxColorComponent = MaxVectorComponent( data->emissive );
		++data;
		++m_sourceCount;
	}
	memset( data, 0, dataSize - sizeof( SourceData ) * ( m_sources.size() + m_lights.size() ) );
	CCP_STATS_ADD( shLightingSecondarySources, m_sourceCount );
}