private void ReadHeader()
{
plyHeader = new PLYHeader();
string magic = streamReader.ReadLine();
if( magic != "ply" )
{
throw new InvalidDataException( "PLY files must have \"ply\" as the first line." );
}
dataBegin += 1 + magic.Length;
string formatLine = streamReader.ReadLine();
string[] delimiters = new string[] { " " };
string[] formatTokens = formatLine.Split( delimiters, StringSplitOptions.RemoveEmptyEntries );
dataBegin += 1 + formatLine.Length;
if( formatTokens.Length != 3 )
{
throw new InvalidDataException( "Invalid format line: " + formatLine );
}
if( formatTokens[ 0 ] != "format" )
{
throw new InvalidDataException( "Invalid format line: " + formatLine );
}
switch( formatTokens[ 1 ] )
{
case "ascii":
fileMode = PLYFileMode.ASCII;
break;
case "binary_little_endian":
fileMode = PLYFileMode.BINARY_LITTLE_ENDIAN;
break;
case "binary_big_endian":
fileMode = PLYFileMode.BINARY_BIG_ENDIAN;
throw new InvalidDataException( "Reading binary_big_endian is not supported." );
default:
throw new InvalidDataException( "Invalid format line: " + formatLine );
}
}
// event triggers
private void OnHeaderRead( PLYHeader plyHeader )
{
if( HeaderRead != null )
{
HeaderRead( plyHeader );
}
}