Method doWrite

src/IECoreScene/PDCParticleWriter.cpp:112–264

}

void PDCParticleWriter::doWrite( const CompoundObject *operands )
{
	// write the header
	int numParticles = particleCount();

	ofstream oStream( fileName().c_str(), std::ios_base::binary | std::ios_base::out );
	if( !oStream.is_open() )
	{
		throw IOException( ( format( "Unable to open file \"%s\"." ) % fileName() ).str() );
	}

	char pdc[4] = { 'P', 'D', 'C', ' ' };
	oStream.write( pdc, 4 );

	int fileVersion = 1; fileVersion = asBigEndian( fileVersion );
	oStream.write( (const char *)&fileVersion, sizeof( fileVersion ) );

	int one = 1; one = asBigEndian( one );
	oStream.write( (const char *)&one, sizeof( one ) );

	int unused = 0; unused = asBigEndian( unused );
	oStream.write( (const char *)&unused, sizeof( unused ) );
	oStream.write( (const char *)&unused, sizeof( unused ) );

	int numParticlesReversed = asBigEndian( numParticles );
	oStream.write( (const char *)&numParticlesReversed, sizeof( numParticlesReversed ) );

	// check each attribute is of an appropriate type
	const PrimitiveVariableMap &pv = particleObject()->variables;
	vector<string> attrNames;
	particleAttributes( attrNames );
	vector<string> checkedAttrNames;
	for( vector<string>::const_iterator it = attrNames.begin(); it!=attrNames.end(); it++ )
	{
		DataPtr attr = pv.find( *it )->second.data;
		const IECore::TypeId t = attr->typeId();
		if( t==DoubleVectorDataTypeId || t==IntVectorDataTypeId || t==V3dVectorDataTypeId ||
			t==DoubleDataTypeId || t==IntDataTypeId || t==V3dDataTypeId ||
			t==FloatVectorDataTypeId || t==V3fVectorDataTypeId || t==FloatDataTypeId || t==V3fDataTypeId ||
			t==Color3fDataTypeId || t==Color3fVectorDataTypeId )
		{
			checkedAttrNames.push_back( *it );
		}
		else
		{
			msg( Msg::Warning, "PDCParticleWriter::write", format( "Attribute \"%s\" is of unsupported type \"%s\"." ) % *it % attr->typeName() );
		}
	}

	// write out the attributes
	DataCastOp castOp;
	int numAttrs = checkedAttrNames.size();
	int numAttrsReversed = asBigEndian( numAttrs );
	oStream.write( (const char *)&numAttrsReversed, sizeof( numAttrsReversed ) );
	for( vector<string>::const_iterator it = checkedAttrNames.begin(); it!=checkedAttrNames.end(); it++ )
	{
		int nameLength = it->size();
		int nameLengthReversed = asBigEndian( nameLength );