/// <summary>
/// Reads an FBX document from the stream
/// </summary>
/// <returns>The top-level node</returns>
/// <exception cref="FbxException">The FBX data was malformed
/// for the reader's error level</exception>
public FbxDocument Read()
{
// Read header
bool validHeader = ReadHeader(stream.BaseStream);
if (errorLevel >= ErrorLevel.Strict && !validHeader)
{
throw new FbxException(stream.BaseStream.Position,
"Invalid header string");
}
var document = new FbxDocument {
Version = (FbxVersion)stream.ReadInt32()
};
// Read nodes
FbxNode nested;
do
{
nested = ReadNode(document);
if (nested != null)
{
document.AddNode(nested);
}
} while (nested != null);
// Read footer code
var footerCode = new byte[footerCodeSize];
stream.BaseStream.Read(footerCode, 0, footerCode.Length);
if (errorLevel >= ErrorLevel.Strict)
{
var validCode = GenerateFooterCode(document);
if (!CheckEqual(footerCode, validCode))
{
throw new FbxException(stream.BaseStream.Position - footerCodeSize,
"Incorrect footer code");
}
}
// Read footer extension
var dataPos = stream.BaseStream.Position;
var validFooterExtension = CheckFooter(stream, document.Version);
if (errorLevel >= ErrorLevel.Strict && !validFooterExtension)
{
throw new FbxException(dataPos, "Invalid footer");
}
return(document);
}
/// <summary>
/// Reads a full document from the stream
/// </summary>
/// <returns>The complete document object</returns>
public FbxDocument Read()
{
var ret = new FbxDocument();
// Read version string
const string versionString = @"; FBX (\d)\.(\d)\.(\d) project file";
AsciiTokenParser.TryConsumeWhiteSpace(_fbxAsciiFileInfo);
bool hasVersionString = false;
if (AsciiTokenParser.TryParseCommentToken(_fbxAsciiFileInfo, out var commentToken))
{
var match = Regex.Match(commentToken.Value, versionString);
hasVersionString = match.Success;
if (hasVersionString)
{
ret.Version = (FbxVersion)(
int.Parse(match.Groups[1].Value) * 1000 +
int.Parse(match.Groups[2].Value) * 100 +
int.Parse(match.Groups[3].Value) * 10
);
}
}
if (!hasVersionString && _errorLevel >= ErrorLevel.Strict)
{
throw new FbxException(_fbxAsciiFileInfo, "Invalid version string; first line must match \"" + versionString + "\"");
}
FbxNode node;
while ((node = ReadNode()) != null)
{
ret.AddNode(node);
}
return(ret);
}
