private void ReadElementInstanceBinary( PLYElementDescription elementDescription )
{
string elementName = elementDescription.ElementName;
foreach( string propertyName in elementDescription.PropertyNames )
{
int listLength = ReadListLength( elementDescription, propertyName );
OnPropertyBegin( elementName, propertyName, listLength );
PLYScalarType dataType = elementDescription.PropertyDataType( propertyName );
for( int i = 0; i < listLength; ++i )
{
switch( dataType )
{
case PLYScalarType.BYTE:
{
byte val = ReadByteBinary();
OnByteRead( elementName, propertyName, i, val );
break;
}
case PLYScalarType.INT:
{
int val = ReadIntBinary();
OnIntRead( elementName, propertyName, i, val );
break;
}
case PLYScalarType.FLOAT:
{
float val = ReadFloatBinary();
OnFloatRead( elementName, propertyName, i, val );
break;
}
case PLYScalarType.DOUBLE:
{
double val = ReadDoubleBinary();
OnDoubleRead( elementName, propertyName, i, val );
break;
}
default:
throw new NotImplementedException( "Sorry, I need to implement reading other types" );
}
}
OnPropertyEnd( elementName, propertyName, listLength );
}
}
private int ReadListLength( PLYElementDescription elementDescription, string propertyName )
{
int listLength = 1;
if( elementDescription.IsList( propertyName ) )
{
PLYScalarType lengthType = elementDescription.PropertyLengthType( propertyName );
switch( lengthType )
{
case PLYScalarType.CHAR:
listLength = ( int )( ReadCharBinary() );
break;
case PLYScalarType.BYTE:
listLength = ( int )( ReadByteBinary() );
break;
case PLYScalarType.SHORT:
listLength = ( int )( ReadShortBinary() );
break;
case PLYScalarType.USHORT:
listLength = ( int )( ReadUShortBinary() );
break;
case PLYScalarType.INT:
listLength = ReadIntBinary();
break;
case PLYScalarType.UINT:
listLength = ( int )( ReadUIntBinary() );
break;
default:
throw new InvalidDataException( "List length must be an integer type." );
}
}
return listLength;
}
private void ReadElementDeclarations()
{
PLYElementDescription currentElement = null;
string line = streamReader.ReadLine();
dataBegin += 1 + line.Length;
while( line != null && line != "end_header" )
{
string[] delimiters = new string[] { " " };
string[] tokens = line.Split( delimiters, StringSplitOptions.RemoveEmptyEntries );
switch( tokens[ 0 ] )
{
// on a comment, do nothing
case "comment":
break;
// on an element declaration
// append the previous one (unless it's the first)
// and create a new one
case "element":
if( currentElement != null )
{
plyHeader.AddElementDescription( currentElement );
}
// and parse the new one
if( tokens.Length != 3 )
{
throw new InvalidDataException( "Invalid element declaration: " + line );
}
string elementName = tokens[ 1 ];
int nInstances = int.Parse( tokens[ 2 ] );
currentElement = new PLYElementDescription( elementName, nInstances );
break;
// on a property declaration
// append the property to the current element
case "property":
if( tokens.Length < 3 )
{
throw new InvalidDataException( "Invalid property declaration: " + line );
}
// read the property type
string propertyType = tokens[ 1 ];
if( propertyType == "list" )
{
if( tokens.Length < 5 )
{
throw new InvalidDataException( "Invalid property declaration: " + line );
}
PLYScalarType lengthType = scalarTypeFromString( tokens[ 2 ] );
if( lengthType == PLYScalarType.FLOAT ||
lengthType == PLYScalarType.DOUBLE )
{
throw new InvalidDataException( "List length must be an integer type. Found: " + tokens[ 2 ] );
}
PLYScalarType dataType = scalarTypeFromString( tokens[ 3 ] );
string propertyName = tokens[ 4 ];
currentElement.AddListProperty( propertyName, lengthType, dataType );
}
else
{
PLYScalarType dataType = scalarTypeFromString( propertyType );
string propertyName = tokens[ 2 ];
currentElement.AddScalarProperty( propertyName, dataType );
}
break;
}
line = streamReader.ReadLine();
dataBegin += 1 + line.Length;
}
if( currentElement != null )
{
plyHeader.AddElementDescription( currentElement );
}
}